Abb. 1: Regler Nr. 14

Abb. 2: Regler Nr. 15

5-Kanal Anschlu

Subwoofer Amp Ein-/Ausgang

+12V Masse Remote

Abb. 3: Regler Nr. 25

Abb. 4: Regler Nr. 26

Technische Daten HXA 500 MK II / HXA 500 Q MK II Ausgangsleistung pro Kanal an 4 Ohm. 4 x 60/80 Watt RMS/Musik Ausgangsleistung Subwoofer an 4 Ohm. 1 x 150/250 Watt RMS/Musik Ausgangsleistung Subwoofer an 2 Ohm. 1 x 250/400 Watt RMS/Musik Frequenzbereich. 20 Hz - 20 kHz, +/- 0,2 dB Klirrfaktor. < 0,009% TIM. < 0,016% Geruschspannungsabstand. > 100 dB Eingangsimpedanz. 10 kOhm Eingangsempfindlichkeit. 700 mV - 8 V Aktive Frequenzweiche (standard). Hoch- und Tiefpass 85Hz/12db Oct.und Full Range umschaltbar Zuschaltbarer RCA Ein-/Ausgang fr Subwoofer-Signal. Regelbare aktive Subwoofer-Frequenzweiche. 50 Hz bis 250 Hz, 12dB Oct. mit integriertem parametrischem Equalizer Sicherung.2 x 30 Ampere Abmessungen (H x B x T) in mm. 31,5 x 200 x 432 Gewicht netto. 3,6 kg

Abb. 5: Regler Nr. 27

Abb. 6: Regler Nr. 28
congratulations on your purchase of this high-quality HELIX amplifier, made in Germany. This new Helix amplifiers highlights best quality, excellent manufacturing and state-of-the-art technology. They are the optimum completion of HELIX series by AUDIOTEC FISCHER. To find out how Helix amplifiers work best for you, read this manual carefully and follow the instructions for installation. We guarantee that this product has been checked for proper functioning before shipping. We wish you a lot of fun with your new HELIX amplifier. Yours AUDIOTEC FISCHER Team General installation instructions for HELIX amplifiers Before you start installation, disconnect the car battery at the minus pole. We would urge you to have the installation work carried out by a specialist as verification of correct installation and connection of the unit is a prerequisite for warranty cover of the HELIX amplifier. Install your amplifier at a dry location where there is sufficient air circulation to ensure adequate cooling of the equipment. For safety reasons, the amplifier must be secured in a professional manner. This is performed by means of four fixing screws screwed into a mounting surface offering sufficient retention and stability. Before drilling the holes for the screws, carefully examine the area around the installation position and make sure that there are no electrical cables or components, hydraulic brake lines or any part of the petrol tank located behind the mounting surface - otherwise these could be damaged. You should be aware of the fact that such components may also be concealed in the double-skin trim panels/mouldings.

The HELIX amplifiers may only be installed in motor vehicles which have a 12-volt minus pole connected to the chassis ground. Any other system could cause damage to the amplifier and the electrical system of the vehicle. The plus cable from the battery for the complete system should be provided with a main fuse at a distance of max. 30 cm from the battery. The value of the fuse is calculated from the maximum total current input of the car audio system. Install the cabling in a manner which precludes any danger of the leads being exposed to shear, crushing or rupture forces. If there are sharp edges in the vicinity (e.g. holes in the bodywork) all cables must be cushioned and protected to prevent fraying. Never lay the power supply cables adjacent to leads and lines connecting other vehicle equipment (fan motors, fire detection modules, gas lines etc.). In order to ensure safe installation, use only high-quality connections and materials. Ask your dealer for HELIX accessories.
HCC 1 HCC 2 HCC 3 HCC 4 HCC 5
85 Hz HP/LP 85 Hz HP/LP incl. subsonic LP: 60-500 Hz / HP: 60-700 Hz LP: 300 Hz-5 kHz / HP: 500 Hz-7 kHz LP: 300 Hz-5 kHz / HP: 60-700 Hz for bandpass HCC 6 LP: 120-250 Hz / HP: 60-90 Hz for bandpass (kickbass)

Crosscards HCC

Hz 500 Pot.: LP1/LP2
-10 -dB 0 variabel -500 1K 2K 5K 10K Hz

300 Hz 5K Pot.: LP1/LP2

HELIX Cross Cards (HCCs) HCC1 is inserted as standard in every HELIX Precision Line amplifier. To expand the operation range of your HELIX amplifier, your dealer will provide the following HCCs as optional equipment: Valid for all modules: low pass: red LED is on high pass: yellow LED is on full range: green LED is on bandpass: red and yellow LEDs are on (switchposition low pass)

60 Hz 700 Pot.: HP1/HP2

-1K 2K 5K 10K Hz

500 Hz 7K Pot.: HP1/HP2

-1K Hz

50 Hz 90 Pot.: HP1/HP2

ENGLISH

Dear Customer,

General instruction for connecting the amplifiers
Warning: The impedance of the woofer in bridged mode must not be lower than 3 ohms! 17 - 18 Plug-in frequency crossover modules The HXA 400 MK II are equipped as standard with an 85 Hz/12 dB Oct. frequency module. Other plug-in modules compatible with HELIX HXA 500 MK II/ HXA 500Q MK II such as variable high-pass/low-pass frequency modules, are available on request. The individual functions of the frequency modules are visually displayed by colored LEDs. These have the following meanings for all modules: yellow = high pass green = full range red = low pass red and yellow = band pass If required the plug-in frequency crossover modules are available with a 28 Hz/18 dB Oct. subsonic filter. 19 Speaker connection terminals for channels A and B

20 Speaker connection terminals for channels C and D 21 - 23 CPS-Color Protection System The LEDs show the operation status of the amp. Green = O.K.; yellow = the speakers wires are shorted to ground; red = over heated. If the amp shuts off due to overheating it will take some time (depending on the outside temperature) until it switches on again. Important notice Never connect the speaker wires to the chassis of the vehicle. This can destroy your amplifier. All speaker systems must be connencted in-phase, this means plus to plus and minus to minus. The plus pole is normally marked on the speaker. In addition, the amplifire can operate channels A and B as well as C and D in stereo or mono mode (bridged). Besides from stereo and mono mode, the amp can be connected for tri-mode use, which means that two stereo speakers can be operated with one pair of wires (AB or CD) and have a third speaker connected in mono mode. Please see basic instruction sheet for various speaker connections.
1 Connecting the remote lead The remote lead is connected to the automatic antenna (aerial positive) output of the head unit (radio). This is only activated if the head unit is switched ON. Thus the amplifier is switched on and off with the head unit. 2 Connecting the ground cable The ground cable should be connected to a central ground reference point (this is located where the negative terminal of the battery is grounded at the metal body of the vehicle), or to a bright bare-metal location on the vehicle chassis, i.e. an area which has been cleaned of all paint residues. 3 Connecting the battery cable Connect the +12 V cable to the positive terminal of the battery. Recommended cross section: min. 10mm2. 4 Fuses The input fuses are connected in parallel and provide protection against an internal equipment fault, i.e. the system must be additionally protected by a further line fuse located in the vicinity of the battery (max. distance from battery: 30 cm). The fuse ratings are 2 x 30 amperes, both must be installed as the amplifier protection rating is 60 amperes (2 x 30 A).
5 - 8 Signal inputs The HXA 400 MK II has RCA connections for cinch cables leading from the pre-amplifier outputs, the line outputs of the head unit or the outputs of a pre-amplifier/equalizer, e.g. HXE 100. These connectors are goldplated in order to ensure better signal transmission. 9 - 12 Level controls for input sensitivity These controls can be used to match the input sensitivity of the individual channels - A to D - to the output voltage of the connected head unit. These controls are not volume controls and are solely intended for the purpose of sensitivity trimming. The control range extends from 330 mV to 8,4 V. 13 Selector switch for channels A and B For switching the plug-in frequency crossover modules to high pass, full range or low pass. 14 Selector switch for channels C and D For switching the plug-in frequency crossover modules to high pass, full range or low pass. 15 - 16 Mono/Stereo Selector For switching the amplifier into 4 - channel operation mode both switches must be in stereo position. To use the amp in 3- channel mode (front / sub), the front channel has to be set in stereo and the sub channel to mono/ bridged.

Technical specifications HXA 400 MK II Cont. power rating at 4 Ohm per channel. 4 x 65/85 W RMS/max. power Cont. power rating at 2 Ohm per channel. 4 x 100/150 Watts RMS/max. power Cont. power rating bridged at 4 Ohm. 2 x 200/300 Watts RMS/max. power Frequency response. 20 Hz - 20 kHz, +/- 0,2 dB Total harmonic distortion (THD). < 0,009% TIM distortion. < 0,016% Signal to noise ratio. > 100 dB Input impedance. 10 kOhm Input sensitivity. 700 mV - 8 V Fuse.2 x 25 Ampere Dimensions (H x W xD) in mm. 31,5 x 200 x 336 Weight net. 2,6 kgs
1 Connecting the remote lead The remote lead is connected to the automatic antenna (aerial positive) output of the head unit (radio). This is only activated if the head unit is switched ON. Thus the amplifier is switched on and off with the head unit. 2 Connecting the ground cable The ground cable should be connected to a central ground reference point (this is located where the negative terminal of the battery is grounded at the metal body of the vehicle), or to a bright bare-metal location on the vehicle chassis, i.e. an area which has been cleaned of all paint residues. 3 Connecting the battery cable Connect the +12 V cable to the positive terminal of the battery. Recommended cross section: min. 10mm2. 4 Fuses The input fuses are connected in parallel and provide protection against an internal equipment fault, i.e. the system must be additionally protected by a further line fuse located in the vicinity of the battery (max. distance from battery: 30 cm). The fuse ratings are 2 x 30 amperes, and both must be installed as the amplifier protection rating is 60 amperes (2 x 30 A). 5 - 8 Signal inputs The HXA 500 MK II/HXA 500Q MK II have RCA connectors for cinch cables leading from the pre-amplifier outputs, the line outputs of the head unit or the outputs of a pre-amplifier/equalizer, e.g. HXE 100. These connectors are gold-plated in order to ensure better signal transmission. High power outputs of radios or similar units cannot be connected directly on the amplifier. 9 Signal input selector If only one stereo signal is available (i.e. 2 cinch leads connected), the inputs can be connected from A to C and from B to D by setting the selector switch to position 2. When the selector is set to position 1, all the inputs are separate.

5-10 - 15

Connecting the remote lead Connecting the ground cable Connecting the battery cable Fuses Signal inputs Signal input selector Level controls for input sensitivity

- 22 23

Subwoofer amplifier input selector Plug - in frequency crossover modules
Speaker connection terminal for the subwoofer Setting the center frequencies Level control for raising the cut - off frequencies Band width adjustment Phase control CPS-Colour Protection System Bridged Selector
Selectors switch channels A and B 26 Selectors switch channels C and D Cinch input and output Speaker connection terminals for channels A and B Speaker connection terminals for channels C and D 29 - 31 32
Active low pass filter Level control for subwoofer amplifier
10 - 13 Level controls for input sensitivity These controls can be used to match the input sensitivity of the individual channels - A to D - to the output voltage of the connected head unit. These controls are not volume controls and are solely intended for the purpose of sensitivity trimming. The control range extends from 700 mV to 8 V. 14 Active low pass filter This control enables the frequency range of the integrated subwoofer amplifier to be infinitely variable from 50 to 250 Hz low-pass. (see Fig. 1) 15 Level control for the subwoofer amplifier This control enables the level of the subwoofer to be adjusted to requirements independently of the other channels. (see Fig. 2) 16 Subwoofer amplifier input selector Setting A The subwoofer amplifier operates with the summation signal of the 4 inputs with allowance for the input level of the individual channels. The frequency range is adjusted with the aid of low pass filter 14. Additionaly a mono-summation signal is also available at cinch socket 21 for driving e.g. a centerspeaker-amplifier. Setting B (only HXA 500 MK II) Cinch socket 21, is connected as the input of the subwoofer amplifier. The signal can be adjusted with the aid of the integrated active crossover controls (controls 14 and 15). Setting B (only HXA 500Q MK II) Cinch socket 21, is connected as the input of the subwoofer amplifier. The signal can be adjusted with the aid of the integrated parametric equalizer (controls 25 to 28) and with the aid of the active crossover controls (control 14 and 15). Setting C (only HXA 500 MK II) Cinch socket 21 is connected as a direct input of the subwoofer amplifier. This is expedient if there is a signal available specially for the subwoofer amplifier, e.g. supplied from an equalizer or head unit.
Setting C (only HXA 500 Q MK II) Cinch socket 21 is connected with the parametric equalizer of the subwoofer amplifier. 17 - 18 Plug-in frequency crossover modules The HXA 500 MK II/HXA 500Q MK II are equipped as standard with an 85 Hz/12 dB Oct. frequency module. Other plug-in modules compatible with all HELIX Precision Line amplifiers such as variable highpass/low-pass frequency modules, are available on request. The individual functions of the frequency modules are visually displayed by colored LEDs. These have the following meanings for all modules: yellow = high pass green = full range red = low pass If required the plug-in frequency crossover modules are available with a 28 Hz/18 dB Oct. subsonic filter. For additional frequency modules see page 7. 19 Selector switch for channels A and B For switching the plug-in frequency crossover modules to high pass, full range or low pass. 20 Selector switch for channels C and D For switching the plug-in frequency crossover modules to high pass, full range or low pass. 21 Cinch input and output The cinch socket is employed, as indicated in the description relating to Selector 16, either as a fifth input of the subwoofer amplifier (selector positions B and C) or as an output (selector position A). 22 Speaker connection terminals for channels A and B 23 Speaker connection terminals for channels C and D

24 Speaker connection terminal for the subwoofer This connection consists of two positive terminals and two ground terminals in order to allow a higher cable cross section or to enable two subwoofers to be connected in parallel. The impedance minimum of all connected loudspeakers must not be higher than 2 ohms (in bridged mode of the channels AB / CD, 4 ohms). With the use of ported woofer enclosures this value can be passed very easy. In this case please ask the manufacturer of the woofer. Important notice! Never connect the speaker cables to the vehicle ground (chassis). This can destroy your amplifier. Ensure that all the speaker systems are correctly connected, i.e. plus to plus and minus to minus. The plus pole is indicated on most speakers. Parametric equalizer of the HXA 500Q MK II The HXA 500Q MK II amplifier features a highly innovative integrated parametric equalizer for the subwoofer amplifier. This means a wide range of possibilities for individual adaptation of the subwoofer. Besides the HXA 500Q MK II has an integrated subsonic filter 26 Hz/ 30 dB Oct. 25 Setting the center frequencies Control 25 can be used to select a frequency of 50 - 150 Hz on the preset low-pass frequency band (see control 14). This center frequency can be raised using control 26, by between 0 and 9 dB. This is desirable if certain frequencies of the subwoofer are to be enhanced (kick bass) or corrected. (see Fig. 3) 26 Level control for raising the cut-off frequencies This control enables the center frequency set at control 25 to be raised from between 0 and 9 dB. (see Fig. 4) 27 Band width adjustment Control 27 can be used to enhance the Q of the frequency set at control 25. The resultant band width can be infinitely varied from 10 to 110 Hz. (see Fig. 5)
The bandwidth remains constant if the centre frequency (control 25) is changed. 28 Phase Control This control enables the phase of the bass signal to be shifted by 180 in order to achieve optimum delay equalization with the other channels. (see Fig. 6) Important notice! Incorrect adjustment of the parametric equalizer can have a considerable deleterious effect on sound quality. In such cases, consult your BRAX/HELIX dealer. If this is not immediately possible, turn controls 25 to 28 completely counter-clockwise so that the subwoofer amplifier operates in the linear mode. 29 - 31 CPS-Colour Protection System The LEDs show the operation status of the amplifier. Green (control 29) = O.K.; yellow (control 30) = the speakers wires are shorted to ground; red (control 31) = over heated. If the amp shuts off due to overheating it will take some time (depending on the outside temperature) until it switches on again. 32 Bridge selector To run the satellite channels A+B and C+D in bridged mode, the control 32 must be setted at position B and control 9 at position 2. The signal inputs 8+7 and level controls 10+13 have to be used as input. If the variable modules HCC 3 - HCC 6 are inserted and the amplifier is running in bridged mode the controls (HP+LP) which turn to the output transistors, are in operation. Important notice: The impedance in bridged mode must not be lower than 4 ohms!

Fig. 1: Control No. 14

Fig. 2: Control No. 15

5-channel connection

Subwoofer Amp In-/Output

+12V Ground Remote

Fig. 3: Control No. 25

Fig. 4: Control No. 26

Technical specifications Cont. power rating at 4 Ohm per channel. 4 x 60/80 W RMS/max. power Cont. power rating subwoofer at 4 Ohm. 1 x 150/250 W RMS/max. power Cont. power rating subwoofer at 2 Ohm. 1 x 250/400 W RMS/max. power Frequency response. 20 Hz - 20 kHz, +/- 0,2 dB Total harmonic distortion (THD). < 0,009% TIM distortion. < 0,016% Signal to noise ratio. > 100 dB Input impedance. 10 kOhm Input sensitivity. 700 mV - 8 V Active crossover (standard). high- and lowpass 85Hz/12db oct.and full range switchable Add-on operating RCA in/output connector for subwoofer signal. Adjustable active subwoofer-crossover. 50 Hz bis 250 Hz, 12dB Oct. with integrated parametric equalizer Fuse.2 x 30 Ampere Dimensions (H x W x D) in mm. 31,5 x 200 x 432 Weight net. 3,6 kgs

Fig. 5: Control No. 27

Fig. 6: Control No. 28
AUDIOTEC FISCHER GMBH Gewerbegebiet Lake II Hnegrben 26 D-57392 Schmallenberg Tel.: ++49 (0) 29 72-0 Fax: ++49 (0) 29 72-88 E-mail: info@audiotec-fischer.com Internet: www.audiotec-fischer.com

Output 2

bridged

Output 1

Channel D+C
Level adjustment mono stereo

Channel B+A

15Hz 1kHz

1kHz 5kHz

1kHz 17 5kHz
Pos. 1 = 15Hz - 1kHz Pos. 2 = 1kHz - 5kHz

Valid only for HXA 40X

High pass Full range Low pass Channel D+C
High pass Full range Low pass Channel B+A

BASIC INSTRUCTION SHEET

4-Channel mode
SPEAKER CONNECTIONS 3-Channel mode

2-Channel mode

-- + -- +

Speaker output

Speaker output Speaker output AT 2 OHM WE RECOMMEND TO USE THE COOLING FAN HXF 30
AUDIOTEC FISCHER HUENEGRAEBEN 26 D-57392 SCHMALLENBERG GERMANY
on speaker protection temperature protection

D Channel Input

B Channel Input
A Ground +12 V Remote Fuse 30 A
Schalter 12: Position 1+3

Schalter 12: Position 2

Wichtiger Hinweis! Verbinden Sie niemals die Lautsprecherleitungen mit der Kfz-Masse (Chassis). Dieses kann Ihren Verstrker zerstren. Achten Sie darauf, da alle Lautsprechersysteme phasenrichtig angeschlossen sind, d.h. Plus zu Plus und Minus zu Minus. Der Pluspol ist bei den meisten Lautsprechern gekennzeichnet. Important! Do not ground speaker output terminal to vehicle chassis.This can destroy your amplifier. Please pay attention to connect all loudspeakers in proper phase, i.e. plus to plus and minus to minus.

dB 0 -5 -10 -1K Hz

Hochpass/Tiefpass 90Hz Highpass/Lowpass 90Hz

HXA 40X

dB 0 variabel -5 -10 -1K Hz

450 1K

Schalter 15/16 auf Position 1 Schalter 13/14 auf Lowpass Tiefpass: 15Hz - 1kHz Switch 15/16 at Position 1 Switch 13/14 at Lowpass Lowpass: 15Hz - 1kHz

No.17/18

dB 0 variabel -5 -10 -1K 2K 5K 10K Hz

1,8 1,5 1,3 1K

2,7 3,3 4K 5K
Schalter 15/16 auf Position 2 Schalter 13/14 auf Lowpass Tiefpass: 1kHz - 5kHz Switch 15/16 at Position 2 Switch 13/14 at Lowpass Lowpass: 1kHz - 5kHz

Schalter 15/16 auf Position 1 Schalter 13/14 auf Highpass Hochpass: 15Hz - 1kHz Switch 15/16 at Position 1 Switch 13/14 at Highpass Highpass: 15Hz - 1kHz
Schalter 15/16 auf Position 2 Schalter 13/14 auf Highpass Hochpass: 1kHz - 5kHz Switch 15/16 at Position 2 Switch 13/14 at Highpass Highpass: 1kHz - 5kHz

ENGLISH

Dear Customer, congratulations for purchasing this high-quality Helix amplifier, made in Germany. This new Helix amplifiers highlights best quality, excellent manufacturing and stateof-the-art technology. They are the optimum completion of Helix Performance Line by Audiotec Fischer. To find out how Helix amplifiers work best for you, read this manual carefully and follow the instructions for installation. We guarantee that this product has been checked for proper functioning before shipping. We wish you a lot of fun with your new Helix amplifier. Yours, Audiotec Fischer Team Installation Instructions Before you start installation, disconnect the car battery at the minus pole. We would urge you to have the installation work carried out by an authorized specialist as verification of correct installation and connection is a prerequisite for warranty cover of the Helix amplifiers. Install your amplifier at a dry location with sufficient air circulation to ensure adequate cooling of the equipment. For safety reasons, the amplifier must be secured in a professsional manner. For this use the attached four fixing screws and fix them into a mounting surface offering sufficient stability. Before drilling the holes for the screws, carefully examine the area around the installation position and make sure that there
Before drilling the holes for the screws, carefully examine the area around the installation position and make sure that there are no electrical cables or components, hydraulic brake lines or any part of the tank located behind the mounting surface otherwise these could be damaged. You should be aware of the fact that such components may also be concealed in the double-skin trim panels/ mouldings. Instruction for connecting the amplifier The Helix HXA 40/ HXA 40X may only be installed in motor vehicles which have a 12-volt minus pole connected to the chassis ground. Any other system could cause damage to the amplifier and the electrical system of the vehicle. The plus cable from the battery for the complete system should be provided with a main fuse at a distance of max. 30 cm from the battery. The value of the fuse is calculated from the max. total current input of the car audio system. Install the cabling in a manner which precludes any danger of the leads being exposed to shear, crushing or rupture forces. If there are sharp edges in the vicinity (e.g. holes in the bodywork) all cables must be cushioned and protected to prevent fraying. Never lay the power supply cables adjacent to leads and lines connecting other vehicle equipment (fan motors, fire detection modules, gas lines etc.). In order to ensure safe installation use only high quality connectors and materials. Ask your dealer for Brax and Helix accessories.

1 Connecting the remote wire The remote wire is connected to the automatic antenna (aerial positive) output of the head unit (radio). This is only activated if the head unit is switched ON. Thus the amplifier is switched on and off with the head unit. 2 Connecting the battery cable Connect the +12 V cable to the positive terminal of the battery. Recommended cross section: 10 mm2. 3 Connecting the ground cable The ground cable should be connected to a central ground reference point (this is located where the negative terminal of the battery is grounded at the metal body of the vehicle), or to a bright bare-metal location on the vehicle chassis, i.e. an area which has been cleaned of all paint residues. 4 Fuse The input fuse provides protection against internal equipment fault, i.e. the system must be additionally protected by a further line fuse located near the battery (max. distance from the battery: 30 cm/ 12 inch). The fuse value of the amplifier is 30 Ampere. 5 - 8 Signal inputs The HXA 40/ HXA 40X have RCA connectors for cinch cables leading from the pre-amplifier outputs, the line outputs of the head units or the outputs of a pre-amplifier/ equalizer, e.g. HXE 100. These connectors are gold-plated in order to ensure better signal transmission. 9 Green LED When the green LED is on the amplifier is in operation. 10 Yellow LED If the yellow LED is on there is a malfunction in the amplifier or a short-circuit at the loudspeakers. 11 Red LED The red LED turns on when the amplifier is overheated. 13 Selector switch for channels A and B For switching the frequency crossover to highpass, lowpass or full range. 14 Selector switch for channels C and D For switching the frequency crossover to highpass, lowpass or full range. 19 - 20 Switch for mono/ bridged and stereo With this switch the channels A and B (19) and C and D (29) can be bridged to mono. In this case the total impedance of the connected speakers must be 4 ohm or higher. In stereo mode the connected total impedance per channel can be 2 ohm or higher. In mono mode the total input signal of both channels cannot be higher than 8.5 V ! 21 - 24 Level adjustment for input sensitivity These controls can be used to match the input sensitivity of the individual channels A to D to the output voltage of the connected head unit. These controls are not volume controls and are solely intended for the purpose of sensitivity trimming. The adjustment range extends from 350 mV to 8.5 V.

controls and are solely intended for the purpose of sensitivity trimming. The adjustment range extends from 350 mV to 8.5 V. 25 Speaker connection terminal for channels A and B 26 Speaker connection terminal for channels C and D Integrated active crossover of HXA 40 The HXA 40 has an integrated active crossover of 90 Hz/ 12 dB Oct. The operating mode can be selected with the switches 13 and 14.

Only for HXA 40X:

12 Selector for signal inputs Position 1: If there is only one stereo signal provided, use switch 12 at position 1 only for the inputs A and B (only this input RCA connectors can be used at position 1). Position 2: In this position all four inputs of the amplifier can be used. On both positions the residual signal from channel C and D is applied at the RCA outputs 27 (C) and 28 (D). Example: HXA 40/ HXA 40X channel C and D highpass =RCA output 27 lowpass channel C =RCA output 28 lowpass channel D Position 3: Full active operating mode The HXA 40X can be used in this operating mode for a full active system. In this case the inputs A and B (only these can be used in this mode), controlled by the switches 13 and 15 with the use of controller 17, the frequencies for the speaker outputs A and B will be specified. The signal which is not processed from both channels (remaining signal from A and B) will be supplied to the channels C and D. At this channels C and D the remaining signal will be specified with the switches 14 and 16 and controller 18. The signal that remains of channel C and D is supplied to the RCA connectors 27 and 28 where it can be used for connecting an additional amplifier. Example: If A and B are used as highpass at 4 kHz, the frequencies up to 4 kHz are provided to the channels C and D. If the frequencies are used for highpass, i.g. 180 Hz, the channnels C and D get a bandpass signal from 180 Hz to 4 kHz. The frequencies up to 180 Hz are provided to the outputs 27 and 28 for connecting an additional subwoofer amplifier. 15 - 16 Switch for selecting the frequencies range With this switch the adjustment range of the potentiometers 17 and 18 can be selected from 15 Hz to 1 kHz at position 1 and from 1 kHz to 5 kHz at position 2. 17 - 18 Frequency controller Frequency adjustment controller for the channels A+B (controller 17) and C+D (controller 18). 27 - 28 RCA outputs The RCA outputs supply the residual signal for connecting an additional amplifier. (look at point 12).
Technical Specifications: Cont. Power rating at 4 Ohm p. channel Cont. Power rating at 2 Ohm p. channel Cont. Power bridged into a 4 Ohm load Frequency Response Total Harmonic Distortion (THD) TIM Distortion Signal to Noise Ratio Input Impedance Input Sensitivity Fuse Dimensions (HxWxD) in mm Weight net HXA 40 Switchable Frequency Crossover HXA 40X Adjustable Crossover 4x60/80 Watts RMS/Max. Power 4x90/125 Watts RMS/Max. Power 2x180/250 Watts RMS Max. Power 20Hz-20kHz,+/-0,2dB <0,009% <0,016% >100dB 10kOhm 350mV-8,5V 30 Ampere 31,5x218x295 2,4kgs Highpass/Lowpass 90Hz and Full Range Frequency range 15Hz-5000Hz HP/LP Also to use for bandpass