3002.3_.11 _1_

Stereo

Amplifier

Operating Instructions

Owner's

Record
are located on the bottom below. this product. of the unit.
The model and serial numbers
Record the serial number in the space provided Refer to these numbers Model No. XM-754HX whenever Serial No.
you call upon your Sony dealer regarding

XM-754HX

Sony Corporation 1997 Printed in Japan

Features

Maximmn power output ot IYUwaits pu_ chaJ,wl (at 4 _). This unit can be used as a bridging amplifier with a maximum output of 400 watts. Direct connection can be made with the speaker output of your car audio if it is not equipped with a line output (High level input connection). Built-in variable LPF (Low-pass filter), HPF (Highpass filter) and low boost circuit. Possible to switch between HI-CURRENT mode (12 _) and HI-VOLTAGE mode (2 - 4 f2). Protection circuit and indicator provided. Pulse power supply* for stable, regulated output power.
Ne\\ from t lrt'uit which directly. lenlo\es the soullc stage, lesistancL' and drives the final MOS FET output the speaker
* Pulse power supply This unit has a built-in power regulator which couw'rts the power supplied by the DC 12 V ear battery into high speed pulses using a semiconductor switch. These pulses are stepped up by the built-in pulse transformer and separated into both positive and negative power supplies before being converted into direct current again. This is to regulate fluctuating voltage from the car battery. This light weight power supply system provides a highly efficient power supply with a low impedance output.
Location and Function of Controls
[] [] MODE indicator Indicates HI-CURRENT mode or Eli-VOLTAGE mode.

MODE PowER/PR61:EcT'ER.

POWER/PROTECTOR indicator OVER CURRENT lights up in green during normal operation. I he colo_ will change from green to amber when receiving a powerful signal. OFF SET lights up green during normal operation. The color will change from green to amber when the voltage going out to the Speaker terminal or the Pin Jack is too high. THERMAL lights up in green during normal operation. The color will change from green to amber when the temperature rises to an unsafe level. The color will return to green when the temperature returns to normal. LEVEL adjustment control The input level can be adjusted with this control when using source equipment made by other manufacturers. Turn it to MAX when the output level of the car audio seems low. LOW BOOST level control Turn this control to boost the frequencies dB.

Troubleshooting Guide

The following checklist through will assist in the correction the checklist below, refer ol most pzobJcms to the connection which and } ou ma} c_lvuu*ltct procedures. *_ith } uuJ u*.t, Before Problem The POWER/PROTECTOR indicator does not light up. going operating Cause/Solution The fuse is blown. --_ Replace the fuse with a new one. connected. ---* Fasten the ground lead securely

[HbCURRENT

HI'VOLTAGEJ[OVERCURRENT

OFFSET

THERMAL
The ground lead is not securely to a metal point of the car.
FILTER LEVEL LOWB00ST LPF OFF HPF
The voltage going into the remote terminal is too low. The connected master unit is not turned on. ---* Turn on the master The system employs too many amplifiers. ---+ Use a relay. Check the battery
The OVER in amber. CURRENT indicator light up

voltage

(10.5 - 16 V). outputs are short-circuited. cord and ground _ Rectify
Turn off the power switch. The speaker the cause of the short-circuit. Turn off the power securely connected. switch.

around

40 Hz to a maximum
The OFFSET amber. The THERMAL amber. indicator lights up in

Make sure the speaker

lead are
Cut-off frequency adjustment control Sets the cut-off frequency (50-200 Hz) for the low-pass

or high-pass

filters.

indicator

lights
FILTER selector switch When the switch is in the LPF position, the filter is set to low-pass. the HPF position, the filter is set to high-pass.

When in

Alternator noise is heard.
The unit heats up abnormally. Use speakers with suitable impedance. - HI-CURRENT mode: 1 to 8 fL - HI-VOLTAGE mode: 2 to 8 ft. Use HI-CURRENT mode to reduce generated heat. Make sure to place the unit in a well ventilated location. The power connecting leads are installed Keep the leads away from the cords. The ground lead is not securely to a metal point of the car. connected. too close to the RCA pm cords. ---+ Fasten the ground -+
HI-CURRENT/HI-VOLTAGE mode switch (located on the bottom of the unit) Remove the bottom cover to access the switch. In HI-CURRENT mode the speaker impedance is 1 to 2 fL This mode sends a signal via parallel circuits for a powerful sound In HI-VOLTAGE mode the speaker impedance is 2 to 4 f_. In this mode you can enjoy clear sound with the dynamic range.

lead securely

Negative speaker leads are touching from the car chassis. The sound is muffled. The sound is too low. The FILTER switch The level adjustment

the car chassis.

---+ Keep the leads away
is set to the "LPF" position. control is set to the "MIN" position.

LOW BOOST

, i 10 , i , i , i , i , p , i , i , i , i

Cut-off dB

frequency/Frequence

de coupure

/J/__'-d

0 _I i 1 i i i i i 10

/F,."- '.
i i i i i i i i 40 i i 7 i i _ i i

%,,.',,.,'

i i r i i i i i i i T i i i l i _ , _ I

', ,' ,","

i i i i i _ _ I , _ _ i i i i I i i i i i i i t i i i i i i i t lk

-eo 1o

. iiii;aH : 'i:i_i'i

i i i t 100

FREQUENCY
Circuit Diagram / Scheme du circuit

FILTER

Normal

._ __-_

_,_ _o_oos, I ,'-----4--- r _d_ I

(MONO)

Invened

Installation

Unit : mm (in.)

Before Installation

Mount seat. the unit either inside the t_unk o_ u* [dc'r a

Unite: mm (po.)

Choose the mounting location carefully so the unit will not interfere with the normal movements of the driver and it will not be exposed hot air from the heater. to direct sunlight where or
Do not install the unit under the floor carpet, the heat dissipation from the unit will be considerably impaired.
T,_ 50 (2) 270 (10 _h) 320 (12 _h) _-=
First, place the unit where you plan to install it, and mark the positions of the four screw holes on the surface of the mounting board (not supplied). Then drill the holes approximately 3 millimeters (ram) in diameter and mount the unit onto the board with the supplied mounting screws. The supplied mounting screws are 15 mm long. Therefore, make sure that the mounting board is thicker than 15 ram.

Connections

Precautions
This unit operation is designcd only. t_,J +t_fi,_tt_ _ _,J_,uJ_d 12 _ i)L

Caution

Before making ally __oJ_w_ tit_Ji>, discoJ u _c_t the i ground terminal of the car battery to avoid short circuits. Be sure to use speakers with an adequate power rating. If you use small capacity speakers, they may be damaged. Do not connect the O terminal of the speaker system to the car chassis, and do not connect the O terminal of the right speaker with that of the left speaker. Install the input and output cords away from the power supply lead as running them close together can generate some interference noise. This unit is a high powered amplifier. Therefore, it may not perform to its full potential if used with the speaker cords supplied with the car. If your car is equipped with a computer system for navigation or some other purpose, do not remove the ground wire from the car battery. If you disconnect the wire, the computer memory may be erased. To avoid short circuits when making connections, disconnect the +12 V power supply lead until all the other leads have been connected.

Input Connections

High Level Connection Input Connection El, _'J or Lq) (with Speaker

Connexions d'entree

High Level Connection Connexion connexion In_But Connection (with Speaker Ik-]) & I'entr_e de haut niveau (avec de haut-parleur I[_Jl)
Left speaker output Sortie de hautparleur gauche O _ ---_

Purple Mauve

Striped Ray_ / r-_ _r I= Striped Ray_

Connexion connexion

& I'entrde de haut niveau (avec de haut-parleur El, _1 ou Lq)
Use speakers with suitable impedance. -- HI-CURRENT mode: 1 to 2 _2. -HI-VOLTAGE mode: 2 to 4 _.
Striped Ray_ Front right speaker output Sortie de haut,__==_ Gray Gris Striped Ray_ White Blanc _ ==dl_(_ _ O _ parleur avant droit i Car audio Autoradio Rear right speaker output Sortie de hautparleur arri_re drit I [-J _ _,_ _ Striped Ray_ Green Vert Input cord (Not supplied) C&ble d'entr_e (Non fournis) Input cord C_ble d'entr_e (Not supplied) (Non fournis).1 ) ( *1 Input cord CAble d'entr_e (Not supplied) (Non fournis)
Right speaker output Sortie de hautparleur droit Car audio Autoradio _"_D
Do not connect any active speakers (with built-in amplifiers) to the speaker terminals of the unit. Doing so may damage the active speakers. Avoid installing the unit where: -- it would be subject to high temperatures such as from direct sunlight or hot air from the heater -- it would be exposed to rain or moisture -- it would be subject to dust or dirt. If your car is parked in direct sunlight and there is a considerable rise in temperature inside the car, allow the unit to cool down before use. When installing the unit horizontally, be sure not to cover the fins with the floor carpet etc. If this unit is placed too close to the car radio, interference may occur. In this case, relocate the amplifier away from the car radio. If no power is being supplied to the cassette player or tuner, check the connections. This power amplifier employs a protection circuit* to protect the transistors and speakers if the amplifier malfunctions. Do not attempt to test the protection circuits by covering the heat sink or connecting improper loads. Do not use the unit on a weak battery as its optimum performance depends on a good power supply. For safety reasons, keep your car audio volume moderate so that you can still hear sounds outside your car.

,_ Striped Ray6

=elf ==i _Front
Ileft speaker output Sortie de hautparleur avant gauche
Rear left ipea ker_ output Sortie de hautparleur arriere gauche

41== 41=__ Striped Ray6

Input cord (Not supplied) C&ble d'entr4e (Non fournis)

__O_1_O

Note Make sure that the right speaker output from the car audio is connected to the connector marked "REAR" on the unit.
Make the terminal connections as illustrated

below.

Remarque Assurez-vous que la sortie du haut-parleur droit de l'autoradio est raccordde au connecteur portanl l'indication "REAR" sur l"appareil.

Fuse Replacement

If the fuse blows, check the power connection and replace the fuse. If the fuse blows again after replacement, there may be an internal malfunction. such a case, consult your nearest Sony dealer. In
Line Input Connection (with Speaker Connection H, I_ or In) Connexion d'entr_e de ligne (avec connexion de haut-parleur Ell, I_ ou El}
Line Input Connexion haut-parleur
Connection d'entr_e I[_1)

(with de ligne

Speaker (avec

Connection connexion

Ikl) de
Note Tighten the screws firmly, but be careful not to apply too nluch force* as doing so may damage the screws.

Car audio Autoradio

Warning
When replacing the fuse, be sure to use one matching the amperage stated above the fuse holder. Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit.

Rear Arri_re

OUT Right Canal channel droit
* The torque value should be less than 1 N.m.
Note Make st,'rc that the hnc output from the car audio is connected to the jack marked '% (M ONO)'" on the unit. _

Left Canal

channel gauche

[_ [_]

Remarque Vdrifiez que la sortie de ligue de portant I'indication sur l'appareil. "L (MONO)"
Pass the leads through the cap, connect the leads, then cover the terminals with the cap.
*Protection circuit This aolplifier is provided with a protection circuit that operates in the following cases: -- when the unit is overheated -- when a DC current is generated - when the speaker terminals are short circuited. The color of the POWER/PROTECTOR indicator will change from green to red, and the unit will shut down. If this happens, turn off the comlected equipmen t, take out the cassette tape or disc, and determine the cause of the malfunction. If the amplifier has overheated, wait until the unit cools down before use. If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer.

l' autoradio est raccordde h la prise

Speaker Connections

4-Speaker System (with Input Connection _ or [_l)

Raccordement

3-Speaker Syst_me d'entr_e System

de haut-parleurs

(with Input Connection connexion _ or [_J)

Power C6bles

Connection Leads d'alimentation

& 4 haut-parleurs

connexion

d'entrde

& 3 haut-parleurs il_ ou r_J)
For details on the settings of switches and controls, refer to "Location and Function of Controls."
Pour plus de ddtails sur les r_;llages des c'omnluhtleu!_ el reportez-vous _ "Emplacement et fimctiou de6 commandes ".

conmlandes,

for details on the settings of switches and controls, refet to "Location and Function of Controls."

de &;tails

sur les rdglages
des commutateur,, et fonction

cl des

connnandes, comnlandes".

reportez-vous

h "Emplacement
to a metal point of the car vers une partie metallique de la carrosserie O@_O O @ Subwoofer Full range speakers (rain. 1_/2_)* Rear speakers (min. 1Q12_)* I +12 V car battery Batterie de voiture +12 V (min. 1_12_)* Haut-parleurs avant _ Droit Right Right Left Gauche _ (min. 1_212_2)* Haut-parleurs arri_re Haut-parleurs pleine gamme (min. I_Z/2_;Z)* _ Notes In this system, the volume of the subwoofer will be controlled by the car audio fader control. In this system, the output signals to the subwoofer are a combination of both the REAR L and R INPUT jacks or the REAR high level input connector signals. Droit * mode HI-CURRENT/HI-VOLTAGE * HI-CURRENT/HI-VOLTAGE mode I Subwoofer min. 2_14_)* (min. 2_/4_)*

emote output*

o@@o Left Fuse (40 A) Fusible (40 A) Front speakers (min. lf212_2)*

O@@O _

Speaker Cordon

direct

in connector directement Front Avant
de haut-parleur Left speaker
le connecteur Right speaker
Haut-parleur Left speaker Haut-parleur Black-stripedcord Cordon ray_ noir droit gauche
ortie de teTdcommande* REM OUT)

Autoradio Car audio

Haut-parleur gauche Right speaker Haut-parleur droit
r __ +G_raYGrisBlardk_trriaPeddnCird

Blanc +

Green Vert
* If you have the factory original or some other car audio without a remote out-put on the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. * Si vous disposez du modOle d'origine ou d'un autre autoradio dont l'amplijqcateur ne comporte pas de sortie de teTdcommande, raceordez la borne d'entrge de teTdcommande (REMOTE) h la prise d' alimentation accessoires. "_J Purple Mauve Notes on the power supply Connect the +12 V power supply lead only after all the other leads have been connected.

* HI-CURRENT/HI-VOLTAGE " mode HI-CURRENT/HI-VOLTAGE mode
Remarques Dans ce syst_'na', le volume du subwoofer est contr61(par le.fader de l'au toradio. Sur cet appareil, Ins signaux transmis vers le subwoofer sont constituEs des signaux des prises REAR Let R INPUT.

2-Speaker

System

Connection

I_ or r_J)

d'entr_e

Left speaker Haut-parleur gauche I Car audio Autoradio
Right speaker Haut-parleur Gray Gris droit
Be sure to connect the ground lead of the unit securely to a metal point of the car. A loose connection may cause a malfunction of the amplifier. Be sure to connect the renwte control lead of the car audio to the remote terminal. When using a car audio without a remote output on the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. Use the power supply lead with afuse attached (40 A). Place the fuse in the power supply lead as close as possible to the car battery. Make sure that the leads to be connected to the +12 Vand

me _ 2 haut-parleurs

For details on the settings of switches and controls, refer to "Location and Function of Controls." Pour plus de ddtails sur h's rdglages des connuutateur_ el commandes, reportez-vous it "Emplacement et fonction de_ commandes ".

& 2 voles

for detaqs on the settings of switches and controls, r_yer to "Location and Function of Controls."
I our plus de details sur les rdglages des commutateur_ el commandes, reportez-vous it "Emplacement et fonction des

comnlandes'.

Noir/Gris
Left speaker (min. 2_/4_)* Haut-parleur gauche (min. 2_214Q)*
Full range speakers (rain. 1_/2Q)* Haut-parleurs pleine (min. 2_/4_)* Right speaker droit Haut-parleur (min. 2_/4_)* gamme (min. 1_/212)* 1_ Right Droit Left Gauche _ Subwoofers (min. 1Q/2_)* Subwoofers (min. 1Q/2_)*
Cord diameter 0.3 - 1.25 mm (AWG 22 - 16)
GND terminals of this unit are larger than 10-Gauge (AWG10) or have a sectional area of more than 5 mm _. When using the optional RC-46 power amplifier connecting cord, consult that manual for proper use.

Flat-head screwdriver Tournevis ,_ lame plate
tion du cordon : 0,3 - 1,25 mm (AWG 22 - 16) 11 (7h6)
mode HI-CURRENT/HI-VOLTAGE Note In this system, the volume of the subwoofers will be controlled by the car audio fader control. Rernarque Dans ce syst_me, le volume des subwoofers est contr61_ par le fader de Fautoradio.
* HI-CURRENT/HI-VOLTAGE mode HI-CURRENT/HI-VOLTAGE mode Unit_ : mm (po.) Unit : mm (in.)

Specifications

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION 75 watts per channel minimum continuous average power into 4 ohms, both channels driven from 20 Hz to 20 kHz with no more than 0.04% total harmonic distortion per Car Audio Ad Hoc Committee standards.

Other Specifications

OTL (output transformerless) circuit Pulse power supply Inputs RCA pin jacks High level input connector Outputs Speaker terminals Speaker impedance 1" - 8 H (stereo) 2* - 8 H (when used as a bridging amplifier) Maximum outputs (HI-CURRENT/HI-VOLTAGE) Four speakers: 90/170 W x4(at 4H) Three speakers: 90Wx2+250Wxl / 170Wx2+ 400Wx 1 (at 4 H) Two speakers: 250/400 W x 2 (at 4 f_) Rated outputs (HI-CURRENT/HI-VOLTAGE) (supply voltage at 14.4 V) Four speakers: 35/75 W x 4 (20 Hz - 20 kHz, 0.04 % THD, at 4 H) 50/100 W x 4 (20 Hz - 20 kHz, 0.1% THE), at 2 H) Two speakers: 100/200 W x 2 (20 Hz- 20 kHz, 0.1% THD, at 4 H) Frequency response 5 Hz- 50 kHz (%_dB) Circuit system Harmonic distortion Input level adjustment 0.005 % or less (at lkHz, 4 H) range 0.2 - 4.0 V (RCA pin jacks) 0.4 - 8.0 V (High level input) 50 - 200 Hz, -12 dB/oct 50 - 200 Hz, -12 dB/oct 0 - 10 dB (40 Hz) 12 V DC car battery (negative ground) 10.5 - 16 V at rated output: 40 A (4H HI-VOLTAGE mode) Remote input: 1.5 mA Approx. 258 x 50 x 320 ram (w/h/d) (10 _/4 x 2 x 12 s/a in.) not incl. projecting parts and controls Approx. 3.5 kg (7 lb. 11 oz.) not incl. accessories Mounting screws (4), Terminal cap (1) Connecting cord for power amplifier RC46 are subject to change without
High-pass filter Low-pass filter Low boost Power requirements Power supply voltage Current drain

Dimensions

Mass Supplied Optional accessories accessories

Design notice.

specifications

HI-CURRENT only