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Service Manual
BRIDGEABLE POWER AMPLIFIER
ORDER NO.
CRT2636
GM-X252
Model GM-X352/X1R/UC Order No. CRT2614 Mech. Module Remarks
X1R/UC
- This service manual should be used together with the following manual(s):
EXPLODED VIEWS AND PARTS LIST
PACKING(Page 2)
- PACKING SECTION PARTS LIST
Mark No. Symbol and Description GM-X352/X1R/UC 5 Carton HHG0278 6 Contain Box HHL0278 Part No. GM-X252/X1R/UC HHG0304 HHL0304
EXTERIOR(Page 4)
- EXTERIOR SECTION PARTS LIST
Mark No. 10 11 13 16 Symbol and Description Panel Panel Heat Sink Amp Unit GM-X352/X1R/UC HNB0124 HNB0126 HNR0179 HWH0145 Part No. GM-X252/X1R/UC HNB0141 HNB0150 HNR0189 HWH0167
PIONEER CORPORATION
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2000
K-ZZS. DEC. 2000 Printed in Japan
Service Manual
BRIDGEABLE POWER AMPLIFIER
GM-X352/X1R/EW
ORDER NO.
CRT2614
GM-X352
X1R/UC,EW,ES
CONTENTS
1. 2. 3. 4. 5. SAFETY INFORMATION............................................2 EXPLODED VIEWS AND PARTS LIST ......................2 SCHEMATIC DIAGRAM.............................................6 PCB CONNECTION DIAGRAM..................................8 ELECTRICAL PARTS LIST........................................12 6. ADJUSTMENT .........................................................14 7. GENERAL INFORMATION.......................................15 7.1 DISASSEMBLY ..................................................15 8. OPERATIONS AND SPECIFICATIONS ....................16
PIONEER CORPORATION
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2000
K-ZZS. NOV. 2000 Printed in Japan
GM-X352
1. SAFETY INFORMATION
- GM-X352/X1R/UC
CAUTION This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely; you should not risk trying to do so and refer the repair to a qualified service technician. WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health & Safety Code Section 25249.6 - Proposition 65
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
2
GM-X352
NOTE:
- Parts marked by "*" are generally unavailable because they are not in our Master Spare Parts List. - Screws adjacent to mark on the product are used for disassembly.
- PACKING SECTION PARTS LIST
Mark No. * 1-1 1-2 1-3 * 1-4 2 3 4 5 6 7 Description Warranty Card Owner's Manual Owner's Manual Card Screw Polyethylene Bag Polyethylene Bag Carton Contain Box Protector GM-X352/X1R/UC Not used HRD0165 Not used ARY1048 BYC40P180FZK HEG0011 HEG0013 HHG0278 HHL0278 HHP0105 HDE0036 HNS0101 Part No. GM-X352/X1R/EW HRY1157 HRD0157 Not used Not used BYC40P180FZK HEG0011 HEG0013 HHG0278 HHL0278 HHP0105 HDE0036 HNS0101 GM-X352/X1R/ES Not used HRD0166 HRD0172 Not used BYC40P180FZK HEG0011 HEG0013 HHG0278 HHL0278 HHP0105 HDE0036 HNS0101
8 Cord Assy 9 Cover
- Owner's Manual
Model GM-X352/X1R/UC GM-X352/X1R/EW GM-X352/X1R/ES Part No. HRD0165 HRD0157 HRD0166 HRD0172 Language English, French English, Spanish, German, French, Italian, Dutch English, Spanish Portuguese(B), Arabic
3
GM-X352
2.2 EXTERIOR
A
4
GM-X352
(1) EXTERIOR SECTION PARTS LIST
Mark No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Description Screw Screw Screw Screw Screw(M3x12) Screw(M3x5) Screw(M3x8) ····· Case Panel Panel Holder Heat Sink Cover Spacer Amp Unit Terminal(CN903) Fuse(20A) Pin Jack(CN801) Terminal(CN901) Part No. BBZ30P050FMC BBZ30P060FMC BBZ30P080FMC BSZ30P050FZK CBA1323 HBA0006 HBA0011 HNB0131
See Contrast table(2) See Contrast table(2)
Mark No. 21 22 23 24 25
Description Terminal(CN905) Terminal(CN906) Connector(CN904) Holder Screw
Part No. HKE0037 HKE0037 HKM1077 HNC0082 PPZ30P100SAD HXA0322 PPZ30P100FZK
26 Light Pipe Unit 27 Screw
HNC0080
See Contrast table(2)
HNS0101 HNV0016
See Contrast table(2)
CKF1059 HEK0020 HKB0001 HKE0036
(2) CONTRAST TABLE GM-X352/X1R/UC, EW and ES are constructed the same except for the following:
Mark No. 10 11 13 16 Description Panel Panel Heat Sink Amp Unit GM-X352/X1R/UC HNB0124 HNB0126 HNR0179 HWH0145 Part No. GM-X352/X1R/EW HNB0141 HNB0146 HNR0189 HWH0144 GM-X352/X1R/ES HNB0124 HNB0126 HNR0179 HWH0146
5
1
2
3
4
GM-X352
3. SCHEMATIC DIAGRAM
3.1 AMP UNIT
Note: When ordering service parts, be sure to refer to "EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS LIST".
A
L+ R+ L- R-
A
AMP UNIT
LPF SELECT
ISOLATOR GAIN = 1
LP FILTER 80Hz - 12dB/OCT
GAIN
B
C
REGULATOR DC/DC CONVERTER
(EW,ES m
B
D
6
A
1
2
3
4
5
6
7
8
GM-X352
A
AMP GAIN = 5 - 31dB
AIN
B
C
(EW,ES model)
BFC
50µH
D
5
6
7
A
8
7
1
2
3
4
GM-X352
4. PCB CONNECTION DIAGRAM
4.1 AMP UNIT
NOTE FOR PCB DIAGRAMS
A
A AMP UNIT
1. The parts mounted on this PCB include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic diagram. 2. Viewpoint of PCB diagrams
Connector Capacitor
FUSE
SIDE A
P.C.Board
Chip Part
SIDE B
B
C
D SPEAKER INPUT
8
A
1
2
3
4
5
6
7
8
GM-X352
SIDE A
SPEAKER OUTPUT A BFC
B
C
R GAIN L INPUT LPF D
A
5 6 7 8
9
1
2
3
4
GM-X352
A
A
AMP UNIT
B
C
D
10
A
1 2
3
4
5
6
7
8
GM-X352
SIDE B
A
B
C
D
A
5 6 7 8
11
GM-X352
5. ELECTRICAL PARTS LIST
NOTE:
- Parts whose parts numbers are omitted are subject to being not supplied. - The part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS.....) CKS....., CCS....., CSZS.....
=====Circuit Symbol and No.===Part Name --- ----------------------------------------------Part No. ------------------------=====Circuit Symbol and No.===Part Name --- ----------------------------------------------D D D D D D D L L L T TH TH S S VR 902 954 955 956 957 958 959 801 802 901 951 951 953 101 951 101 Diode Diode Diode Diode Diode Diode Diode Ferri-Inductor Ferri-Inductor Choke Coil 50µH Transformer Thermistor Thermistor Switch(LPF SELECT) Switch(BFC)(EW,ES model) Volume 10k(A) Fuse 20A Part No. ------------------------ERA15-02VH 1SS133 1SS133 FML22S FML22R HZS16L(1) HZS16L(1) CTF1007 CTF1007 CTH1218 HTT0012 CCX1013 CCX1035 CSH1021 HSH-156 CCS1241 HEK0020
HWH0145(GM-X352/X1R/UC) A Unit Number :: HWH0144(GM-X352/X1R/EW) Unit Name
MISCELLANEOUS
IC IC IC IC IC IC Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q D D D D D D D D D 101 151 651 801 802 951 151 152 154 155 156 251 252 254 255 256 601 602 605 606 651 652 653 654 655 656 657 658 659 951 952 953 956 957 960 961 601 602 651 652 653 654 655 656 901 IC IC IC IC IC IC Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor FET FET Transistor Transistor Diode Diode Diode Diode Diode LED Diode Diode Diode NJM4558MD NJM2068M PA2027A NJM2068M NJM2068M UPC494C 2SA992 2SC1845 2SC1845 2SD2438 2SB1587 2SA992 2SC1845 2SC1845 2SD2438 2SB1587 2SD1768S 2SD1768S 2SC2412K 2SC2412K 2SA1037K 2SC2412K 2SC2412K 2SC2412K 2SA1037K 2SC2458 2SA1048 2SB1243 DTA124ES DTA114ES 2SA1048 2SA1048 STP55NE06FP STP55NE06FP 2SD1864 2SB1243 1SS133 1SS133 1SS133 HZS7L(A2) 1SS133 SML210LT(LMN) ERA15-02VH ERA15-02VH ERA15-02VH
: HWH0146(GM-X352/X1R/ES) : Amp Unit
RESISTORS
R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R 102 103 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 202 203 251 252 253 254 255 256 257 258 259 RS1/10S103J RS1/10S103J RS1/10S222J RS1/10S910J RS1/10S511J RS1/10S223J RS1/10S153J RS1/10S153J RD1/4PU561J RD1/4PU561J RD1/4PU161J RD1/4PU161J RD1/4PU473J RD1/4PU473J RD1/4PU221J RD1/4PU562J RD1/4PU222J RD1/4PU473J RD1/4PU473J CCN1013 CCN1013 CCN1013 CCN1013 RD1/2PM100J RS1/10S103J RS1/10S103J RS1/10S222J RS1/10S910J RS1/10S511J RS1/10S223J RS1/10S153J RS1/10S153J RD1/4PU561J RD1/4PU561J RD1/4PU161J
0.22 0.22 0.22 0.22
12
GM-X352
=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R 260 261 262 263 264 265 266 267 268 269 270 271 272 601 602 605 606 609 610 613 614 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 801 802 803 804 805 806 807 808 809 810 811 812 813 814 831 832 953 954
Part No. ------------------------RD1/4PU161J RD1/4PU473J RD1/4PU473J RD1/4PU221J RD1/4PU562J RD1/4PU222J RD1/4PU473J RD1/4PU473J CCN1013 CCN1013 CCN1013 CCN1013 RD1/2PM100J RD1/4PU393J RD1/4PU393J RD1/4PU564J RD1/4PU564J RD1/2PM473J RD1/2PM473J RS1/10S472J RS1/10S472J RS1/10S104J RS1/10S103J RS1/10S472J RD1/4PU392J RS1/10S472J RS1/10S222J RS1/10S221J RS1/10S102J RS1/10S473J RS1/10S103J RS1/10S103J RS1/10S222J RS1/10S472J RS1/10S392J RS1/10S392J RS1/10S103J RS1/10S472J RS1/10S473J RS1/10S223J RS1/10S223J RS1/10S223J RS1/10S472J RD1/4PU101J RD1/4PU221J RD1/4PU152J RD1/2PM681J RS1/10S471J RS1/10S471J RS1/10S223J RS1/10S223J RN1/10SE2201D RN1/10SE2201D RN1/10SE2201D RN1/10SE2201D RS1/10S104J RS1/10S104J RN1/10SE2201D RN1/10SE2201D RN1/10SE2201D RN1/10SE2201D RS1/10S683J RS1/10S683J RD1/4PU392J RD1/4PU101J
=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R R 955 956 957 958 959 960 961 962 963 964 965 966 967 972 973 976 977 978 979 980 981 982 983 984 985 986
Part No. ------------------------RS1/10S473J RS1/10S102J RS1/10S153J RS1/10S105J RD1/4PU101J RD1/4PU332J RD1/4PU101J RS1/10S332J RS1/10S472J RS1/10S472J RS1/10S472J RD1/4PU272J RD1/4PU272J RD1/2PM121J RD1/2PM121J RD1/2PM220J RD1/2PM220J RD1/2PM220J RD1/2PM220J RD1/4PU100J RD1/4PU100J RD1/4PU472J RD1/4PU472J RD1/4PU563J RD1/4PU104J RD1/4PU183J
(EW,ES model)
0.22 0.22 0.22 0.22
CAPACITORS
C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C 102 103 151 152 153 154 155 156 157 158 159 160 171 172 202 203 251 252 253 254 255 256 257 258 259 260 271 272 651 652 653 654 655 656 657 CKSQYB274K16 CKSQYB154K16 CEAS101M10 CCSQSL680J50 CFTNA224J50 CFTNA224J50 CCSQCH220J50 CMA330J2H CMA330J2H CCSQCH220J50 CFTLA223J50 CFTLA333J50 CCSQCH101J50 CCSQCH101J50 CKSQYB274K16 CKSQYB154K16 CEAS101M10 CCSQSL680J50 CFTNA224J50 CFTNA224J50 CCSQCH220J50 CMA330J2H CMA330J2H CCSQCH220J50 CFTLA223J50 CFTLA333J50 CCSQCH101J50 CCSQCH101J50 CCH1036 CKSQYB103K50 CKSQYB103K50 CKSQYB103K50 CEAS100M16 CEAS100M16 CEAS470M16
220µF/10V
13
GM-X352
=====Circuit Symbol and No.===Part Name --- ----------------------------------------------C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C 659 660 661 662 663 801 802 803 804 805 806 807 808 809 810 811 812 831 832 901 951 952 953 954 955 956 958 959 960 961 3300µF/16V
Part No. ------------------------CKSQYB103K50 CEAS220M16 CCH1183 CKSQYB103K50 CQMA103J50 CKSQYB471K50 CKSQYB471K50 CEAS100M16 CEAS100M16 CKSQYB472K50 CKSQYB472K50 CCSQCH271J50 CCSQCH271J50 CCSQCH271J50 CCSQCH271J50 CKSQYB103K50 CKSQYB103K50 CEAS100M16 CEAS100M16 CFTNA224J50 CEAS100M16 CEAS221M10 CQMA102J50 CEAS2R2M50 CEAS100M16 HCH0005 CQMA472J50 CQMA472J50 CQMA102J50 CQMA102J50
=====Circuit Symbol and No.===Part Name --- ----------------------------------------------C C C C C C C C C C C 962 963 968 969 970 971 972 973 974 975 976 2200µF/35V 2200µF/35V
Part No. ------------------------HCH0003 HCH0003 CEAS101M35 CEAS101M35 CEAS100M50 CEAS100M50 CKSQYB473K50 CKSQYB473K50 CEAS470M16 CEAS470M16 CFTLA564J50
470µF/16V
6. ADJUSTMENT
There is no information to be shown in this chapter.
14
GM-X352
7. GENERAL INFORMATION
7.1 DISASSEMBLY
- Removing the Case and the Panel (Fig.1) Case Remove the three screws. Remove the two screws. Remove the two screws and then remove the Case.
Remove the six screws and then remove the Panel. Panel
Fig.1
- Removing the Amp Unit (Fig.2) Remove the eleven screws. Remove the screw. Remove the eight screws and then remove the Amp Unit.
Fig.2 Amp Unit
15
GM-X352
8. OPERATIONS AND SPECIFICATIONS
8.1 OPERATIONS
- GM-X352/X1R/EW
16
Setting the Unit
Power Indicator
The power indicator lights when the power is switched on.
Gain Control
If the sound level is too low, even when the volume of the car stereo used along with this power amplifier is turned up, turn gain control on the front of the power amplifier clockwise. If the sound distorts when the volume is turned up, turn the gain control counter-clockwise.
· When using with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL position. When using with an RCA equipped Pioneer car stereo with max. output of 4 V or more, adjust level to match the car stereo output level. · If you hear too much noise when using the speaker input terminals, turn the gain control counter-clockwise.
BFC (Beat Frequency Control) Switch
If you hear a beat while listening to an MW/LW broadcast with your car stereo, change the BFC switch using a small standard tip screwdriver. (GM-X352/X1R/EW,ES)
LPF (Low-Pass Filter) Select Switch
Set the LPF select switch as follows according to the type of speaker that is connected to the speaker output connector and the car stereo system: LPF Select Switch
LPF (left) OFF (right)
Audio frequency range to be output
Very Low Frequency range Full range
Speaker Type
Subwoofer Full range
Remarks
Connect a subwoofer.
GM-X352
17
GM-X352
Connection Diagram
Fuse (30 A) Special red battery wire [RD-223] (sold separately) After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Fuse (30 A) Ground wire (black) [RD-223] (sold separately) Connect to metal body or chassis.
Grommet
Connecting wires with RCA pin plugs (sold separately).
Car stereo with RCA output jacks
External Output
Front side
RCA input jack
Speaker input terminal
Back side Fuse (20 A)
Speaker output terminal
System remote control wire (sold separately) Connect the male terminal of this wire to the system remote control terminal of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch.
18
GM-X352
8.2 SPECIFICATIONS
- GM-X352/X1R/UC
Power source.............................................................................................. 14.4 V DC (10.8 -- 15.1 V allowable) Grounding system ........................................................................................................................ Negative type Current consumption .................................................................................... 11.3 A (at continuous power, 4 ) Idle current ...................................................................................................................... 5 -- 45 mA Average current drawn* ........................................................................................ 3.8 A (4 for two channels) ............................................................................................................................ 5.9 A (4 for one channel) Fuse ................................................................................................................................................................ 20 A Dimensions ........................................................................................................ 279 (W) x 58 (H) x 157 (D) mm .................................................................................................................... [11 (W) x 2-1/4 (H) x 6-1/8 (D) in] Weight ...................................................................................... 2.5 kg (5.5 lbs) (Leads for wiring not included) Maximum power output .................................................................................................... 80 W x 2 / 200 W x 1 Continuous power output ............................................ 40 W x 2 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.08% THD) .................................................................................. 100 W x 1 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.8% THD) .................................................................................... 50 W x 2 (at 14.4 V, 2 , 20 -- 20,000 Hz, 0.8% THD) Load impedance ............................................................................................................ 4 (2 -- 8 allowable) ........................................................................................................ (Bridge connection: 4 -- 8 allowable) Frequency response ............................................................................................ 10 -- 50,000 Hz (+0 dB, 1 dB) Signal-to-noise ratio ...................................................................................................... 100 dB (IHFA network) Distortion ............................................................................................................................ 0.008% (10 W, 1 kHz) Separation ........................................................................................................................................ 60 dB (1 kHz) Low pass filter .............................................................................................................. Cut off frequency: 80 Hz ................................................................................................................................ Cut off slope: 12 dB/oct Maximum input level/impedance .................................................................... RCA: 6.5 V/22 k (0.4 -- 6.5 V) .................................................................................................................. Speaker: 26 V/40 k (1.6 -- 26 V) Note: · Specifications and the design are subject to possible modification without notice due to improvements. *Average current drawn · The average current drawn is nearly the maximum current drawn by this unit when an audio signal is input. Use this value when working out total current drawn by multiple power amplifiers.
- GM-X352/X1R/EW
Power source .......................................................................... 14.4 V DC (10.8 -- 15.1 V allowable) Grounding system ...................................................................................................... Negative type Current consumption ................................................................ 11.3 A (at continuous power, 4 ) Idle current ...................................................................................................................... 5 -- 45 mA Average current drawn* .................................................................... 3.8 A (4 for two channels) .......................................................................................................... 5.9 A (4 for one channel) Fuse ............................................................................................................................................ 20 A Dimensions ...................................................................................... 279 (W) x 58 (H) x 157 (D) mm Weight .................................................................................. 2.5 kg (Leads for wiring not included) Maximum power output ................................................................................ 80 W x 2 / 200 W x 1 Continuous power output ........................................ 60 W x 2 / 150 W x 1 (DIN45324, +B=14.4 V) Load impedance ........................................................................................ 4 (2 -- 8 allowable) .................................................................................... (Bridge connection: 4 -- 8 allowable) Frequency response ........................................................................ 10 -- 50,000 Hz (+0 dB, 1 dB) Signal-to-noise ratio .................................................................................. 100 dB (IEC-A network) Distortion ........................................................................................................ 0.008 % (10 W, 1 kHz) Separation .................................................................................................................... 60 dB (1 kHz) Low pass filter .......................................................................................... Cut off frequency: 80 Hz .............................................................................................................. Cut off slope: 12 dB/oct Maximum input level/impedance .................................................. RCA: 6.5 V/22 k (0.4 -- 6.5 V) ................................................................................................Speaker: 26 V/40 k (1.6 -- 26 V) Note: · Specifications and the design are subject to possible modification without notice due to improvements. *Average current drawn · The average current drawn is nearly the maximum current drawn by this unit when an audio signal is input. Use this value when working out total current drawn by multiple power amplifiers.
19
GM-X352
- GM-X352/X1R/ES
Power source .......................................................................... 14.4 V DC (10.8 -- 15.1 V allowable) Grounding system ...................................................................................................... Negative type Current consumption ................................................................ 11.3 A (at continuous power, 4 ) Idle current ...................................................................................................................... 5 -- 45 mA Average current drawn* .................................................................... 3.8 A (4 for two channels) .......................................................................................................... 5.9 A (4 for one channel) Fuse ............................................................................................................................................ 20 A Dimensions ...................................................................................... 279 (W) x 58 (H) x 157 (D) mm Weight .................................................................................. 2.5 kg (Leads for wiring not included) Maximum power output ................................................................................ 80 W x 2 / 200 W x 1 Continuous power output ........................ 40 W x 2 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.08% THD) .............................................................. 100 W x 1 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.8% THD) ................................................................ 50 W x 2 (at 14.4 V, 2 , 20 -- 20,000 Hz, 0.8% THD) Load impedance ........................................................................................ 4 (2 -- 8 allowable) .................................................................................... (Bridge connection: 4 -- 8 allowable) Frequency response ........................................................................ 10 -- 50,000 Hz (+0 dB, 1 dB) Signal-to-noise ratio .................................................................................. 100 dB (IEC-A network) Distortion ........................................................................................................ 0.008% (10 W, 1 kHz) Separation .................................................................................................................... 60 dB (1 kHz) Low pass filter .......................................................................................... Cut off frequency: 80 Hz .............................................................................................................. Cut off slope: 12 dB/oct Maximum input level/impedance .................................................. RCA: 6.5 V/22 k (0.4 -- 6.5 V) ................................................................................................ Speaker: 26 V/40 k (1.6 -- 26 V) Note: · Specifications and the design are subject to possible modification without notice due to improvements. *Average current drawn · The average current drawn is nearly the maximum current drawn by this unit when an audio signal is input. Use this value when working out total current drawn by multiple power amplifiers.