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Table of Contents

Introduction...4
Welcome!.... Main features... Signal path.... What is Valve Reactor technology?... 5 5

Quick start...6

Setup.... 6 Checking out the preset programs... 7 Switching between the user programs.. 7

Top and rear panels...8

A. Top panel.... 8 B. Rear panel... 11
About the three operating modes..13
Preset mode (recalling preset programs)... 13 Manual mode... 13 Channel Select mode (recalling user programs).. 14
Creating and saving sounds..15
Creating a sound... Adjusting the noise reduction... Saving a program.... Checking the original values saved in a program... Restoring the factory settings... 17
Using a foot switch (VOX VFS5)..18
Foot switch operations in Channel Select mode.. 18 Foot switch operations in Preset or Manual modes.. 18
Explanation of the amps and effects.19
Amp models... 19 Effects.... 22 Reverb.... 24
Troubleshooting...25 Specifications...27 Song program list..28 Program sheet..29

Introduction

Welcome!
Thank you for purchasing the VOX VT15, VT30, VT50 or VT100 Valvetronix amp. To help you get the most out of your new amplifire, please read this manual carefully. Get ready to enjoy the VT-series amazing guitar sounds!

Main features

The VT-series use Valve Reactor technology, and feature a power amp circuit containing a 12AX7 (ECC83) dual triode valve (vacuum tube) that would normally be used in a preamp. This allows the amp to produce the true sound and feel of a bona fide all valve (tube) amp. Sophisticated modeling technology is used to provide twenty-two different amps. Twelve high-quality effects are built-in. Of these, reverb is available at all times, and three of the remaining eleven effects are multiple effects that allow you to use up to three effects simultaneously. Noise reduction can also be used simultaneously. You can create a sound using the desired amp and effect, and save it in memory as one of eight programs (two banks x four channels). Programs can be switched while you perform, either from the top panel or from a foot switch connected to the rear panel (Channel Select mode). For each amp model, three preset programs Basic Effected, and Song are provided, giving you a total of 66 programs (Preset mode). The song programs reproduce the tones of classic hits played by famous guitarists. Manual mode lets you use the VT-series as a conventional guitar amp. The physical positions of the actual knobs will be reflected by the sound. An optional VOX VFS5 foot switch (sold separately) can be connected, allowing you to switch programs or turn effects on/off with your feet. The power level control lets you adjust the output wattage of the power amp. Even with the master volume set to the maximum so that the Valve Reactor power amp is loaded, youll still be able to adjust the volume without impairing the tonal character. The external speaker out jack (VT50/VT100 only) lets you connect a guitar speaker cabinet (8 ohm) of your choice. The effect send/return jacks (VT100 only) allow you to connect your external effect processor in a loop connection.

Signal path

Your guitar sound passes through the following sections. Refer to Top and rear panels (p.8) in conjunction with this illustration.

GAIN VOLUME MASTER

VALVE REACTOR EFFECT

COMP /OCTAVE

POWER LEVEL

PRE AMP

Select one of 22

EFFECT

MODULATION /DELAY REVERB
VALVE ECC83 (12AX7) CLASS A or AB FEEDBACK CIRCUIT Circuit is determined by Pre Amp selection
What is Valve Reactor technology?
The Valve Reactor circuit used in the power amp of this VT15/30/50/100 combo amp is based on new technology. Most of the sound creation and tonal shaping is performed in the digital domain, but the Valve Reactor power amp is 100% analog. Passing the guitar signal through the analog-domain power amp stage is an important factor in capturing the feel and tone of the original amp for that model. Valve Reactors power stage is a miniature version of a true tube push/pull power amp. It uses a 12AX7 tube (dual triode; in other words, two vacuum tubes in one), and is similar to a true tube amp with an output transformer. Rather than connecting the vacuum tube directly to a speaker via an output transformer, the signal is converted by a virtual output transformer in which solid stage components emulate the output transformer, and the final output stage circuit is connected to a specially designed VariAmp power circuit. This allows the output of the power stage to be continuously varied from minimum output to maximum output. This VariAmp power circuit is completely transparent i.e., it does not modify the signal so the output tone will be the pure sound of a tube amp. The wide dynamic range seen in a conventional tube amp is also maintained. This dynamic range is a characteristic that is difficult to obtain from a solid-state amp; this is why a tube amp sounds more powerful than a solid-stage amp of the same output specifications. The output of the Valve Reactor power amp reads the constantly changing impedance curve of the connected speaker system, and feeds this information back to the vacuum tube. In response to this information, the operation of the amps tube stage will vary according to the speaker load (impedance). This too is an important element in the sound of a true tube amp. In addition to producing lively tube sound, circuitry characteristics distinctive of the full-tube power stage in the amp being modeled can also be simulated. These characteristics include class-A, class-AB, and power output. By adjusting these characteristics (except for the power output, which the user specifies), every sound of that amp model can be faithfully reproduced. This power amp technology, for which a U.S. patent has been obtained, is unique to the VOX Valvetronix amps.

Top and rear panels

In this chapter we're going to take a look at the top and rear panels of your Valvetronix amp.

A. Top panel

The illustration shows the VT100.

INPUT/PHONES section

INPUT jack This is where you plug in your guitar. PHONES jack Use this jack if you want to output directly to a mixer or recording device, or when you want to use headphones. The signal that is output from this jack is taken from directly before the Valve Reactor power amp, and the cabinet response of the guitar amp will be applied to it. NOTE: If you connect this jack, no sound will be output from the internal speaker.

Amp section

Here you can make settings for the amp. The chicken head type knobs reflect the tradition of VOX amplifiers. [AMP] switch/selector, LED Here you can select the amp mode. Each time you press the [AMP] switch, the AMP LED will change color between green and red, switching between amp banks A and B. Use the [AMP] selector to choose a model within the selected amp bank. The operation of the pre-amp, power amp (class A or AB), the response of the tone controls and their location within the circuit are all switched according to the amp model you select here, causing each of these to behave as they do in the original amp.
In Preset mode (i.e., when the PRESET LED is lit), you can recall preset programs that contain sounds and effect settings that are typical of each amp model. [GAIN] control This adjusts the pre-amp gain of the selected amp model. [VOLUME] control This adjusts the volume of the selected amp model. [TREBLE], [MIDDLE], [BASS] controls These adjust the tone for the high, mid, and low-frequency ranges. The change produced by each control will differ depending on the amp model that youve selected. [REVERB] control This adjusts the mix amount for the reverb. [MASTER] volume This adjusts the volume that is output from the pre-amp to the Valve Reactor power amp. This setting will change the amount of the Valve Reactors distortion. NOTE: The [MASTER] volume setting is not programmed. NOTE: The amount of Valve Reactor distortion is also affected by the GAIN control. For some settings, there will be almost no distortion.

Effect section

Here you can make settings for effects and noise reduction. For details on each effect, refer to Explanation of the amps and effects (p.19). [EFFECTS] selector This selects the effect type. You can use the [TAP] switch and [EDIT] knob to adjust the parameters of each effect. When you switch the effect type, the parameter settings of the effect will be initialized, and Effect Bypass will be disabled. [EDIT] knob This adjusts the parameters of each effect. The knob can adjust three different parameters when used in conjunction with the [TAP] or [BYPASS] switches as described below (when the BYPASS LED is unlit). - EDIT 1: Turn the [EDIT] knob (without holding down a switch). - EDIT 2: Turn the [EDIT] knob while holding down the [TAP] switch. - EDIT 3: Turn the [EDIT] knob while holding down the [BYPASS] switch. When the BYPASS LED is lit (i.e., when the effect is bypassed), you can adjust the sensitivity of the noise reduction by holding down the [TAP] switch and turning the [EDIT] knob. NOTE: You cant adjust effect parameters while the BYPASS LED is lit.

[TAP] switch, LED This sets the speed of modulation-type effects such as Chorus or Flanger, or the time of Delay or Tape Echo effects. The interval between two presses of the switch will be set as the time. The LED will blink at intervals of the specified speed or time. HINT: To set a precise time that matches the tempo of a song, press the switch several times in rhythm with the song. HINT: You can also adjust the speed or time setting by holding down the [TAP] switch and turning the [EDIT] knob (EDIT 2). NOTE: You cant use the [TAP] switch to set the time while the BYPASS LED is lit. The TAP LED will be unlit. [BYPASS] switch, LED If you dont want to use an effect, press this switch to turn off (bypass) the effect. This LED will be lit if the effect is bypassed. NOTE: Pressing this switch will not bypass the reverb. If you dont want to use reverb, turn the [REVERB] knob all the way to the left so that the mix amount is 0. NOTE: You cant adjust effect parameters while the BYPASS LED is lit. HINT: When the effect is bypassed, you can adjust the noise reduction sensitivity by holding down the [TAP] switch and turning the [EDIT] knob. HINT: The bypass setting is remembered even when you switch modes or programs, or when you turn off the power.
Preset/manual/channel section
[PRESET] switch, LED Use this to switch to Preset mode, and to select preset programs (P1: basic, P2: effected, P3: song). In Preset mode you can use the [AMP] switch/selector to select typical sounds (preset programs) for each amp model. The LED will be lit green, orange, or red when youre in Preset mode. [MANUAL] switch, LED Use this to switch to Manual mode. In Manual mode, the sound will reflect the physical position of all of the knobs except for the [EDIT] knob. This lets you use the VT-series just as if it was a conventional guitar amp. The LED will be lit when youre in Manual mode. [BANK] switch, LED Use this to select the channel bank. In Channel Select mode, the bank LED will be lit green or red. If you want to save a new program in a different bank, hold down the [BANK] switch for 0.5 seconds or longer (until the BANK LED starts blinking) and select the desired writing-destination bank (p.16 Saving a program).

[CHANNEL] switches, LEDs Use these to select channels. The LED of the selected channel will be lit. To save a new program, hold down the desired [CHANNEL] switch for one second or longer.

Power switch

[POWER] switch When the power is on, the indicator located above the switch will be lit.

B. Rear panel

VT15/VT30
The illustration shows the VT30.

1 VT50/VT100

(VT100 only)
1. AC power connector This is where you connect the included power cord. 2. FOOT SW (foot switch) jack You can connect an optional foot switch (VOX VFS5: sold separately) here and use it to switch programs while you perform. NOTE: You must connect or disconnect the foot switch while the power is off. Malfunctions or damage may occur if you connect or disconnect the foot switch while the power is on.
3. [POWER LEVEL] control This adjusts the output wattage of the power amp. VT15: less than 0.2W 15W VT30: less than 0.2W 30W VT50: less than 0.2W 50W VT100: less than 0.2W 100W NOTE: The power level setting is not saved in the program. This allows you to output at a range of volume levels without impairing the fat and warm sound (distinctive of classic tube amps) that is produced when you raise the drive of the Valvetronix amps power stage. Even when youre practicing in a small room, you can play without damaging the listeners eardrums or compromising the great tone. 4. EXTERNAL SPEAKER OUT jack You can connect a guitar speaker cabinet to this jack. NOTE: Sound will not be output from the internal speaker if you use the EXTERNAL SPEAKER OUT jack. NOTE: The VT15 and VT30 don't have this jack. Important: To ensure that your system works correctly, you must observe the following points. a) Don't use an external speaker whose impedance is other than 8 ohms. b) Don't connect a speaker whose rated input capacity is less than 50 watts (100 watts for the VT100). The speaker may be destroyed if you ignore this caution - not recommended! c) You must use a speaker cable to connect an external speaker. Don't use a shielded cable like the one you use to connect a guitar to an amp. d) You must turn off the power before connecting the cable. Connecting the cable while the power is turned on may damage your amp. 5. LOOP SEND jack, RETURN jack These are loop jacks that you can connect to your external effect processor. Connect the SEND jack to the input of your external effect processor. Connect the RETURN jack to the output of your external effect processor. NOTE: The VT15, VT30 and VT50 don't have this jack.
About the three operating modes
The VT-series contains three preset programs basic, effected, and song for each of its amp models (giving you a total of 66 programs). You can select these simply by switching the VT-series to Preset mode and using the [AMP] selector. There are also eight channel programs (user programs) that you are free to rewrite; use the [BANK] switch and [CHANNEL] switches or foot switch to switch between these.

Preset mode (recalling preset programs)
In Preset mode you can use the [AMP] switch/selector to recall programs for each amp model: basic programs containing typical sounds for that amp model, effected preset programs, and song preset programs that replicate tones from hit songs. Each program will automatically switch the settings for GAIN, VOLUME, TREBLE, MIDDLE, BASS, and effects.

Switching to Preset mode

If the PRESET LED is dark, youre not in Preset mode. Press the [PRESET] switch; the PRESET LED will light, and youll be in Preset mode.
Recalling a preset program
With the PRESET LED lit, operate the [AMP] switch/selector. The preset program specified for each amp model will be selected, regardless of the position of the top panel control knobs or [EFFECTS] selector. HINT: Each of the twenty-two amp models contain three preset programs: basic, effected, and song (a total of sixty-six programs). In preset mode, pressing the [PRESET] switch will make the PRESET LED cycle through green, orange, and red, switching between preset programs P1:Basic, P2:Effected, and P3:Song. The song presets recall programs that reproduce the tones of hit songs played by famous guitarists. For details on the hit songs that are programmed for each amp model, refer to the table at end of this owners manual.

Manual mode

When the VT-series is in Manual mode, it will behave like a conventional guitar amp. In other words, the sound will reflect the actual position of all the top panel selectors and control knobs (except for the [EDIT] knob).

Switching to Manual mode

If the MANUAL LED is dark, youre not in Manual mode. Press the [MANUAL] switch; the MANUAL LED will light, and youll be in Manual mode. NOTE: In Manual mode, adjusting a parameter whose setting is not determined by the position of a knob (i.e., the effect parameters and the noise reduction setting) will save that setting automatically. Those settings will be recalled the next time you enter Manual mode. However if the [EFFECT] selector is set to a different position than before, the default settings for that effect type will be loaded for the effect parameters.
Channel Select mode (recalling user programs)
In Channel Select mode you can use the [BANK] switch and [CHANNEL] switches to recall the programs that are saved in each channel of the bank; all of the amp and effect parameters will switch automatically.
Switching to Channel Select mode
If the BANK and CHANNEL LEDs are dark, youre not in Channel Select mode. Press the [BANK] switch or a [CHANNEL] switch; the BANK and CHANNEL LEDs will light, and youll be in Channel Select mode.

Switching channels

Press a [CHANNEL] switch to change channels. The program specified for that channel will be selected, regardless of the position of the top panel selectors and control knobs. If you press the [BANK] switch, the bank will change, and the channel of the same number that had been selected in the previous bank will be selected. HINT: If you connect the optional foot switch (VOX VFX5: sold separately) to the rear panel, youll be able to switch banks/channels using your foot. For details, refer to Using the foot switch (VOX VFS5) (p.18). HINT: If you want to disable the effects, press the [BYPASS] switch. The BYPASS LED will light and the effect will be bypassed (except for reverb). If you press the [BYPASS] switch once again, bypass will be cancelled and the effect will be enabled. The bypass setting is maintained even if you switch modes or programs, or turn off the power.
Creating and saving sounds
You can create a sound either by starting with an existing program thats close to what you have in mind and then editing it, or by creating the sound from scratch (i.e., from an initialized state).

Creating a sound

Heres how to create a sound from scratch. 1. Either select a program in Preset mode or Channel Select mode, or put the VT-series in Manual mode. HINT: It doesnt matter which program you select, since youre creating the sound from scratch. 2. Use the [BYPASS] switch to bypass the effect (the BYPASS LED will be lit). Turn the [REVERB] knob all the way to the left to disable the reverb. If you want to use an effect, youll add it last. 3. Use the [AMP] switch/selector to select the amp that you want to use. HINT: For details on the amp models, refer to Explanation of the amps and effects (p.19). 4. Adjust the top panel knobs such as [GAIN], [VOLUME], [TREBLE], [MIDDLE], and [BASS]. 5. While holding down the [TAP] switch, turn the [EDIT] knob to set the noise reduction. This setting is also saved in the program. For details, refer to Adjusting the noise reduction (p.16). HINT: Adjust the noise reduction so that theres no unwanted noise when youre not playing your guitar. 6. If you want to add an effect, press the [BYPASS] switch once again to defeat bypass (the BYPASS LED will be dark). 7. Select the desired effect, and adjust it as desired. For example if you want to add delay, turn the [EFFECT] selector to DELAY. If the selector is already at DELAY, turn it to some other effect type and then back to DELAY. Use the [TAP] switch and [EDIT] knob to set the delay time or delay mix (the amount of delay sound that is added). DELAY TIME: Press the [TAP] switch twice (at the desired timing interval), or turn the [EDIT] knob while holding down the [TAP] switch. (EDIT 2) DELAY MIX: Turn the [EDIT] knob (without holding down a switch). (EDIT 1) DELAY FEEDBACK: Turn the [EDIT] knob while holding down the [BYPASS] switch. (EDIT 3)

HINT: For details on the effect types, refer to Explanation of the amps and effects (p.19). 8. If you want to use reverb, turn the [REVERB] knob to adjust the reverb mix amount.
Adjusting the noise reduction
Heres how to adjust the way in which noise is suppressed. NOTE: Noise reduction is specified individually for each program. In Preset mode or Channel Select mode, the noise reduction setting will be lost if you switch to a different program or to Manual mode or turn off the power before saving. 1. Press the [BYPASS] switch to make the BYPASS LED light. 2. While holding down the [TAP] switch, turn the [EDIT] knob to adjust the sensitivity of the noise reduction. Turning the knob toward the right will produce stronger noise reduction. If the knob is turned all the way to the left, noise reduction will be off and will have no effect. NOTE: Depending on the guitar youre using, raising the noise reduction too high may cause notes to be cut off. 3. If you want to use an effect, press the [BYPASS] switch to make the BYPASS LED go dark.

Saving a program

When youve created a sound you like, heres how to save (write) it. HINT: If youre saving to a channel in the same bank, proceed from step 3. 1. Hold down the [BANK] switch for 0.5 seconds or longer. The BANK LED will blink. 2. Press the [BANK] switch to select the save-destination bank. HINT: If you decide to cancel the Write operation, press [TAP] at this point. The LED will stop blinking, and youll return to the previous mode. 3. For two seconds or longer, hold down the [CHANNEL] switch of the channel in which you want to save the sound. The program will be saved in that channel, and that bank and channel will be selected. NOTE: The program that was previously in that location will be overwritten; i.e., the program that had been in the channel you selected in step 3 will be lost. NOTE: The setting of the [BYPASS] screen is not saved in the program. NOTE: If youre creating your sound in Preset mode or Channel Select mode, the changes you made will be lost if you switch to another program or to Manual mode or turn off the power before saving.
Checking the original values saved in a program
The original value indication lets you check the parameter values that are saved in a program. When you turn a knob to change the value of a parameter, the PRESET LED (if youre in Preset mode) or the LED of the selected channel (if youre in Channel Select mode) will momentarily go dark when the edited value matches the value thats stored in the program. HINT: When youve found a program that you like, and are interested in knowing the actual settings, you can use this original value indication to find out. NOTE: The top panel [MASTER] volume and rear panel [POWER LEVEL] controls are not programmable, so the original value indication is not available for these controls. Nor will the original value indication appear when youre in Manual mode.

Restoring the factory settings
Heres how to restore all settings of the VT-series to their factory-set state. NOTE: This operation will erase all programs that had been saved to channels, and will initialize the factory-set programs. NOTE: This will also initialize the effect and noise reduction settings that you made in Manual mode. 1. Turn off the power. 2. While holding down the [CH1] and [CH4] switches, turn on the power. When the BANK and CHANNEL LEDs start blinking, release the two switches you had been holding down. HINT: If you decide to cancel initialization at this point, press the [TAP] switch. 3. Press the [BYPASS] switch. The BANK and CHANNEL LEDs will change from blinking to lit, and initialization will begin. In one or two seconds, initialization will be completed, and you will switch to Preset mode. NOTE: Never turn off the power while initialization is in progress.
Using a foot switch (VOX VFS5)
If you connect an optional foot switch (VOX VFS5: sold separately) to the rear panel [FOOT SW] jack, youll be able to switch banks/channels and turn effect bypass on/off using your foot. NOTE: You must connect or disconnect the foot switch while the power is off. Malfunctions or damage may occur if you connect or disconnect the foot switch while the power is on. NOTE: Do not press two or more foot switches simultaneously. Doing so may cause malfunctions.
Foot switch operations in Channel Select mode
Switching banks/channels (BANK, CH14 switches)
In Channel Select mode, you can press the VFS5s switches to change the bank or channel. NOTE: You cant change to Channel Select mode by pressing the VFS5s switches in Preset or Manual modes. Nor can you save a program by holding down the VFS5s CH14 switches. NOTE: Operations of the top panel will not be reflected by the VFS5s LEDs.
Foot switch operations in Preset or Manual modes
Tap to set the speed/time (CH2 switch)
In Preset or Manual modes, you can set the speed of a modulation-type effect or the time of a delay-type effect by pressing the VFS5s CH2 switch. The time will be set to the interval between two presses of this switch. NOTE: If the effect is bypassed (i.e., when the top panel BYPASS LED is lit), the CH2 switch will have no effect.
Effect bypass on/off (CH3 switch)
In Preset or Manual modes, you can press the VFS5s CH3 switch to turn effect bypass on/off.
Reverb on/off (CH4 switch)
In Preset or Manual modes, you can press the VFS5s CH4 switch to turn reverb on/off. NOTE: The reverb will turn on when you switch modes, switch programs, turn the power off, or operate the [REVERB] control. NOTE: If you save (write) a program with reverb turned off, the program will be saved with the reverb mix amount at 0.
Explanation of the amps and effects
This section explains the twenty-two amp models and the effects.

Amp models

Here we will explain the twenty-two amp models that were specially selected for the Valvetronix amp from numerous great-sounding amps. Much time was spent on selecting the amps to be modeled, and there were repeated consultations between staff members, much advice obtained from pro musicians and guitar specialists, and countless hours of listening and auditioning. The amps we ended up selecting are the best of the best, and cover a broad range of sounds from pristine clean to incredibly overdriven.

B-2: TWEED 2X12

This American-made tweed-covered 2x12" combo amp made in 1957 is known for its rich and clean tone thats ideal for classic rock, blues, and country. By raising the volume you can also produce a powerful and punchy overdrive sound.

B-3: TWEED 4X10

This models a 4x10" combo amp from 1959 that was originally designed for bass guitar. Its smooth and crisp overdrive sound will respond sensitively to your picking dynamics and to the volume of your guitar.

B-4: AC15

This models channel 2 of the VOX AC15 (1x12," 15W), which was manufactured in 1962 and was a big hit for its compact cabinet, power, and great tone along with then-popular British bands.

B-5: AC30TB

This models an AC30 amp with the top boost circuit that was included as standard starting with units produced in 1964. It delivers a smooth and refined top end, majestically deep overdrive, and a rich and brilliant clean sound.

B-6: BOUTIQUE OD

This models the overdrive channel of a 100W high-quality amp that was produced only on special order, and known as the overdrive special. The wonderful sustain obtained by raising the [GAIN] control is smooth and soulful.

B-7: AC30BM

This models the AC30BM Brian May signature model which faithfully reproduces every nuance of the legendary original AC30 from the 1950s. On the VT-series, this setting provides the screaming sound of the amp being overdriven with the treble booster turned on.

B-8: UK 80S

This models a UK-manufactured 100W single-channel head with master volume made in 1983. Turn the gain control all the way up to get that thick, snarling hard rock and heavy metal sound that dominated the 80s.

B-9: CALI METAL

This models the modern high-gain channel from a wild beast of a high-gain amp. Its deep and loose low-end, sparkling highs, and monstrous gain are ideal for guitars tuned as low as possible, or for metal acts wielding seven-string guitars.

B-10: UK 90S

This models the high-gain channel of a modern 100W amp. While individual notes are clearly defined, it delivers a monster sound thats quite aggressive and arrogant.

B-11: METAL BULL

This models a California-made amp head with a three-channel design and versatile gain switches that produce a wide variety of sounds. On the VT-series, weve modeled the lead channel that produces the ultimate high-gain tone.

Effects

The VT-series provides eleven of the most popular effects (including multiple effects) in addition to reverb. You can set the SPEED parameter of the modulation effects or the TIME parameter of the delays simply by pressing the [TAP] switch twice at the desired interval. Use the [EDIT] knob to set the most important parameters, and make additional detailed settings by turning the [EDIT] knob while holding down the [TAP] switch or [BYPASS] switch.
TYPE TAP EDIT1 [EDIT] EDIT2 [TAP+EDIT] EDIT3 [BYPASS+EDIT]
DELAY TAPE ECHO CHORUS+DELAY COMP+CHORUS OCTAVE+CHORUS CHORUS FLANGER PHASER ROTARY TREMOLO PITCH
TIME TIME DELAY TIME CHORUS SPEED CHORUS SPEED SPEED SPEED SPEED SPEED SPEED PITCH 12, 7, 5, 0, 5, 7, 12
MIX MIX DELAY MIX COMP SENS OCTAVE MIX DEPTH DEPTH DEPTH DEPTH DEPTH MIX
TIME TIME DELAY TIME CHORUS SPEED CHORUS SPEED SPEED SPEED SPEED SPEED SPEED PITCH
FEEDBACK FEEDBACK DELAY FEEDBACK CHORUS MIX CHORUS MIX MIX RESONANCE RESONANCE ----------
NOTE: In order to edit the effect parameter settings, effect bypass must be off (the BYPASS LED must be dark). If bypass is on (BYPASS LED lit), holding down the [TAP] switch and turning the [EDIT] knob will adjust the noise reduction sensitivity instead of an effect parameter. HINT: If you dont want to use an effect in a user program, set the effect type to DELAY or TAPE ECHO. Then turn the [EDIT] knob all the way to the left to minimize the MIX setting.
This models an analog delay that uses a bucket brigade device (BBD) as its delay circuit. Although its audio quality is lo-fi, it is favored for its warmth. The parameters are the same as TAPE ECHO, below.

TAPE ECHO

This models a popular analog tape echo. Originally, the echo was produced by the playback head, and the delay time was adjusted by changing the speed of the motor. TAP TIME Specifies the delay time in a range of 23.1460 [ms]. EDIT1 [EDIT] MIX Adjusts the mix amount of the delay sound. EDIT2 [TAP+EDIT] TIME Lets you use the knob to make fine adjustments in the delay time. EDIT3 [BYPASS+EDIT] FEEDBACK Adjusts the amount of feedback.

ROTARY

This models a rotary speaker. TAP SPEED EDIT1 [EDIT] EDIT2 [TAP+EDIT] DEPTH SPEED Adjusts the modulation speed in a range of 0.8.10 [Hz]. Adjusts the depth of modulation. Lets you use the knob to make fine adjustments in the speed.

TREMOLO

This models a popular tremolo circuit that was built into US-made amps. TAP SPEED Adjusts the modulation speed in a range of 2.5.10 [Hz]. EDIT1 [BYPASS+EDIT] DEPTH Adjusts the depth of tremolo. EDIT2 [TAP+EDIT] SPEED Lets you use the knob to make fine adjustments in the speed.
This is a pitch shifter that allows chords to be input, and provides a maximum pitch change of one octave upward or downward. TAP PITCH Specifies the pitch. Each time you press TAP, the pitch shift amount will cycle between 12, 7, 5, 0, 5, 7, and 12. EDIT1 [EDI T] MIX Adjusts the balance between the direct sound and effect sound. EDIT2 [TAP+EDIT] PITCH Lets you adjust the pitch in semitone steps in a range of 12 to 12.

Reverb

This simulates the spring reverb that is built into guitar amps. Use the [REVERB] knob to adjust the mix amount for the reverb sound. If you dont want to use reverb, turn the [REVERB] knob all the way to the left so that the mix amount is 0. NOTE: The VT-series reverb operates independently of the other effects. Pressing the [BYPASS] switch will not bypass the reverb.

Troubleshooting

1. Power does not turn on when you turn the [POWER] switch on
Is the power cable connected to the rear panel AC power inlet? Is the power cable connected to an AC outlet? Could the AC outlet be malfunctioning? Could the power cable be damaged?

2. No sound from the amp

Could your guitars volume be turned down? Is your guitar cable connected correctly? Could your guitar cable be broken? Could the top panel [MASTER] volume be turned down? Could headphones be connected to the top panel PHONES jack? If so, disconnect them. (If you're using the VT50/VT100) Could a cable be connected to the rear panel [EXTERNAL SPEAKER OUT] jack? Disconnect this jack if you're not using an external speaker. If you don't hear sound from a connected external speaker, make sure that your speaker cable and external speaker are not broken or malfunctioning. Check the settings of the [GAIN], [VOLUME], [TREBLE], [MIDDLE], and [BASS] controls. For some amp models, there may be no sound from the amp if the [TREBLE], [MIDDLE], and [BASS] controls are turned down, just as for the circuitry of the original amp. (VT100 users) Could a cable be connected to only the LOOP [RETURN] jack of the rear panel? Connect the cable from the LOOP [SEND] jack to your external effect unit, and connect the output of that effect unit to the LOOP [RETURN] jack. Adjust the output level of your external effect unit to an appropriate volume. If the VT-series is in Manual mode (MANUAL LED lit), could the [GAIN], [VOLUME], [TREBLE], [MIDDLE], and [BASS] controls be set to 0 or the minimum value?