MA4.2s
Light weight, high performance power amplifier
features
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Switch mode power supply
Superior sonic performance
Light weight
Advanced protection circuits
Efficient copper cooling system
Minimum load switches (MLS™)
applications
technical specifications
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Live sound reinforcement
Fixed installations
MAX OUTPUT POWER
EIA AT 1 kHz AND 1% THD
MLS in 0dB position
8 PER CHANNEL
1300 W
2300 W
2900 W
4600 W
5800 W
4 PER CHANNEL
2 PER CHANNEL
8 BRIDGED
4 BRIDGED
MAX OUTPUT VOLTAGE
8Ω LOAD
The MA4.2s is one of a range of power amplifiers that have been
designed to combine reliability and high power with sonic
excellence. Utilising an advanced switch mode power supply, the
amplifier is characterised by a very high power-to-weight ratio in
a lightweight, 2U package. The innovative technology at the
heart of the MA4.2s enables it to set new standards in terms of
sonic accuracy, impact and clarity.
102 Vrms
145 V
PEAK VOLTAGE, NO LOAD
DISTORTION
THD 20Hz – 20kHz AND 1 W TO FULL POWER 0.1%
THD AT 1kHz AND –1dB UNDER CLIP
DIM AT –3dB UNDER CLIP
HUM AND NOISE
CHANNEL SEPARATION @ 10kHz
OUTPUT IMPEDANCE
SLEW RATE
0.04%
0.04%
<-105dB
80dB
60 mΩ
20 V/µs
INPUTS
GAIN SELECTABLE (dB)
IMPEDANCE
COMMON MODE REJECTION
FRONT PANEL
GAIN CONTROLS
INDICATORS: PROTECT
INDICATORS: CLIP
INDICATORS: SIGNAL PRESENT (-40dB)
REAR PANEL
20, 23, 26, 29, 32, 35, 38, 41
10 kΩ
50dB
31 position detent
Yellow LED
Red LED
Green LED
INPUT CONNECTORS
LINK CONNECTOR
CLIP LIMITERS
Neutrik Combo
XLR-male
On/off each channel
0, -2, -4, -5dB
CH. A-B
MLS SWITCH
LINK-SWITH
POWER
overall dimensions
OPERATION VOLTAGE
SOFT START
130-270V
Yes
5 A
180-260 V
175 V
Yes
PEAK INRUSH CURRENT
FULL OUTPUT POWER
MIN START VOLTAGE
115V OPTION
CURRENT DRAW AT 4Ω/230V
QUIESCENT POWER (NO LOAD)
1/8 OF FULL POWER (-9dB)
1/3 OF FULL POWER (-5dB)
AT FULL POWER (0dB) @ 1kHz 1%THD
DIMENSIONS
0.6 A rms
6 A rms
14 A rms
26 A rms
WIDTH
483mm (19ins)
88mm (3.5ins) 2U
393mm (15.5ins)
10kg (22lbs)
HEIGHT
DEPTH (incl. handles)
WEIGHT
Century Point, Halifax Road, Cressex Business Park,
High Wycombe, Buckinghamshire HP12 3SL, England.
Telephone: +44 (0)1494 535312 Facsimile: +44 (0)1494 438669
E-mail: [email protected]
All information is Copyright © 2003 Martin Audio Ltd.
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