Martin-audio MA4.8Q 功率放大器

Housed in a convenient 2U package, the MA4.8Q 4-channel amplifier allows for the adjustment of maximum voltage peak, gain adjustment and has on-board network capability for monitoring and control. With these features it is now possible to specify identical amplifiers in an installation and then adjust each output to the very specific requirements of the speaker system. A typical large-scale system is a combination of high-powered speakers, full range in-fill speakers, 70/100V ceiling speakers, with an active speaker management system. With switchable outputs and on-board network capabilities, the MA4.8Q can be designed into a complete value engineered system handling all amplification tasks.

FEATURES

Uncompromised sound quality

Integrated CAT-5 based monitoring and

control system

Patented Class TD Topology

Regulated Switch Mode PSU

Voltage and Current Limiters

Over-Temperature and Fuse Protection

Four Discrete Channels

TECHNICAL SPECIFICATIONS

MAX OUTPUT POWER：Four Channels
16Ω PER CHANNEL：625 W
8Ω PER CHANNEL：1000 W
4Ω PER CHANNEL：1200 W
Hi-Z: 70/100V：900 W
MAX OUTPUT VOLTAGE
PER CHANNEL：100 Vrms
DISTORTION
THD 20Hz – 20kHz AND 1 W：0.1%
THD AT 1kHz AND –1dB BELOW CLIP：0.05%
SIGNAL TO NOISE RATIO：112dB
CHANNEL SEPARATION @ 1kHz：70dB
FREQUENCY RESPONSE +0/-3dB：6.8Hz - 34kHz
INPUTS
GAIN SELECTABLE (dB)：23, 26, 29, 32, 35, 38, 41, 44
DEFAULT GAIN：35dB
FRONT PANEL
GAIN CONTROLS：21 position detent
INDICATORS (common)
NormadLink® Network connected：Blue LED
Power Average Limiter：Red LED
Power On：Green LED
Option Card (on)：Yellow LED
FRONT PANEL INDICATORS: (per channel)
Signal present / Hi impedance warning：Green/Red LED
-10dB and -4dB output signal present：2 x Green LED
Voltage Peak Limiter (VPL) clipping：Red LED
Current Peak Limiter (CPL) active：Orange LED
Very High Frequency (VHF) warning：Yellow LED
High Temperature warning：Yellow LED
Fault Warning：2 x Yellow LED
Mute：2 x Yellow LED
REAR PANEL
INPUT CONNECTORS：3-pin Phoenix, electronically balanced
OUTPUT CONNECTORS：Barrier strip 2-pole screw terminals
POWER
OPERATION VOLTAGE：130-265 V / 65-135V
MINIMUM POWER-UP VOLTAGE 230V / 115V：171V / 85V
POWER AVERAGE LIMITER：Yes
SOFT START / INRUSH CURRENT DRAW：Yes / max 5A
DIMENSIONS：（W）483mm (19ins)*（H）88mm (3.5ins) 2U*（D）343mm (13.5ins)
WEIGHT：12kg (26.4lbs)