1
SERVICE MANUAL
US Model
XM-444W
STEREO POWER AMPLIFIER
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
35 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
Circuit system
OTL (output transformerless) circuit Pulse
power supply
Inputs
RCA pin jacks
High level input connector
Input level adjustment range
0.3 – 6 V (RCA pin jacks),
0.6 – 12 V (High level input)
Outputs
Speaker terminals
Speaker impedance
2 – 8
Ω
(stereo)
4 – 8
Ω
(when used as a bridging amplifier)
Maximum outputs
4 Speakers:
80 W
×
4 (at 4
Ω
)
3 Speakers:
80 W
×
2 + 222 W
×
1 (at 4
Ω
)
2 Speakers:
222 W
×
2 (at 4
Ω
)
Rated outputs (supply voltage at 14.4 V)
4 Speakers:
35 W
×
4 (20 Hz – 20 kHz, 0.04% THD, at 4
Ω
)
40 W
×
4 (20 Hz – 20 kHz, 0.1% THD, at 2
Ω
)
2 Speakers:
80 W
×
2 (20 Hz – 20 kHz, 0.1% THD, at 4
Ω
)
Frequency response
5 Hz – 80 kHz ( dB)
Harmonic distortion
0.005% or less (at 1 kHz, 4
Ω
, 10 W)
Low-pass filter
80 Hz, –18 dB/oct
High-pass filter
80 Hz, –12 dB/oct
Power requirements
12 V DC car battery
(negative ground)
Power supply voltage
10.5 – 16 V
Current drain
at rated output : 20 A (4
Ω
, 35 W
×
4)
Remote input : 1.5 mA
Dimensions
Approx. 260
×
55
×
180 mm (w/h/d) not incl.
projecting parts and controls
Mass
Approx. 2.4 kg not incl. accessories
Supplied accessories
Mounting screws (4)
High level input cord (1)
Protection cap (1)
Design and specif ications are subject to c hange without
notice.
SPECIFICATIONS
+0
–3
9-873-977-02
2003B0400-1
© 2003. 02
Sony Corporation
e Vehicle Company
Published by Sony Engineering Corporation
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299