Biamp MXA SERIES User Manual
®
MXA Series
Mixer/Amplifiers
The MXA Series of mixer/amplifiers combines a versatile 6-input mic/line mixer with either 35, 75,
150, or 300 Watt amplification. Mixing functions include mic/line/tel inputs, selectable automatic &
manual channel muting, channel priority assignment, remote level control, tone control, a built-in
limiter, an internal chime, phantom power, MOH output, and extensive patching. The amplifier includes
an output transformer, and provides rated power into direct or distributed speaker systems. The MXA
Series carries a five-year warranty.
FEATURES
•
•
integrated mixer, power amplifier, and output transformer
•
six electronically balanced microphone/line input channels
•
channel 1 selectable for 600 ohm transformer tel input
•
rear panel trim & peak indicator on each input channel
•
+48 Volt phantom power selectable on each input channel
•
automatic muting of selected channels (-20dB or -80dB)
•
automatic muting triggered by selected priority channels
•
manual muting of selected channels (-20dB or -80dB)
•
manual muting triggered from remote contact closures
•
remote control of master level via rear panel terminals
•
integral output limiter with rear panel threshold control
recessed tone controls plus rear panel low-cut filter switch
•
patch points for signal processing and systems interconnect
•
Music On Hold output with independent level, from input 6
•
35, 75, 150, or 300 watts into direct or distributed systems
•
front panel indicators for power, signal, peak, temp, & fault
•
internal pre-announcement chime tone with level control
•
input/output connections provided on barrier strip terminals
• RoHS
• CE
• CCC
•
compliance and AES grounding practices
marked and UL / C-UL listed
certified
covered by Biamp Systems' five-year warranty
ARCHITECTS & ENGINEERS SPECIFICATION
The mixer/amplifier shall provide a 6-input mic/line mixer with an integral power amplifier. Four models shall be available,
providing a choice of 35 Watt, 75 Watt, 150 Watt, or 300 Watt power amplification. The power amplifier shall include an output
transformer, and shall be capable of delivering rated power into direct or distributed speaker systems. Front panel LEDs shall be
provided for indication of power, signal, peak, temp, and fault conditions.
The mixer shall provide six electronically balanced mic/line input channels, with one channel selectable for 600 ohm transformer
telephone input. Each channel shall include a rear panel trim control with peak indicator, a front panel level control, and a rear
panel +48V phantom power switch. Automatic and/or manual muting, by -20dB or -80dB, shall be selectable on each channel.
Automatic muting shall be triggered by selected priority channels and manual muting shall be triggered by external contact
closures. The output section of the mixer shall include a master level control, recessed tone controls, a low-cut filter switch, a builtin limiter with a rear panel threshold control, and an internal pre-announcement chime tone with rear panel level control. Rear
panel terminals shall allow remote control of master level. Output patching shall be provided for connection of external devices for
recording, signal processing, and/or system interconnections. A Music On Hold output with independent level shall be derived from
input 6. Input connections shall be on plug-in barrier strips, and amplifier output connections shall be on screw terminals.
Frequency Response shall be +0/-1.5dB from 20Hz to 20kHz at rated power into a direct load. THD + Noise shall be less than
0.2% at 1kHz at rated power. Equivalent Input Noise shall be -123dBu at mic input with 150W termination. Signal-to-Noise shall
be greater than 78dB from 20Hz to 20kHz at line input at rated power. Power consumption shall be less than 75W (MXA35), 100W
(MXA75), 150W (MXA150), or 300W (MXA300). Dimensions shall be 3.47" (2 rack spaces) high, 19" wide, and 9.8" deep. Weight
shall be 17.5 lbs. (MXA35), 19 lbs. (MXA75), 21 lbs. (MXA150), or 23 lbs. (MXA300). The mixer/amplifier shall be CE marked,
UL/C-UL listed, and shall incorporate AES48-2005 Grounding & EMC practices. The mixer/amplifier shall be compliant with EU
Directive 2002/95/EC, the RoHS directive. Warranty shall be 5 years.
The 35 Watt mixer/amplifier shall be a BIAMP MXA35.
The 75 Watt mixer/amplifier shall be a BIAMP MXA75.
The 150 Watt mixer/amplifier shall be a BIAMP MXA150.
The 300 Watt mixer/amplifier shall be a BIAMP MXA300.
Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. (503) 641-7287 www.biamp.com
®
MXA SERIES SPECIFICATIONS
Output Power(4 ohm load):
MXA35
MXA75
MXA150
MXA300
OutputTransformerVoltages:
Frequency Response (+0/-1.5dB):
4 ohm direct output
transformer output
THD+Noise (1kHz @ rated power):
Equivalent Input Noise (150 ohm termination):
Signal-to-Noise Ratio (20Hz~20kHz):
0dBu input, minimum trim
-60dBu input, maximum trim
Input Impedance / Sensitivity:
mic/line inputs
Tel (Channel 1)
EQ In & Amp In
10kΩ / -71dBu ~ -11dBu
600Ω / -71dBu ~ -11dBu
10kΩ / 0dBu (774mV)
Output Impedance / Level:
Pre Out & Line Out
MOH
100Ω / 0dBu (774mV)
200Ω / +6dBu (1.5V)
Limiter:
attack time
release time
compression ratio
threshold adjust range
MXA300 REAR PANEL DIAGRAM
BIAMP SYSTEMS
MXA300
U
C US
R
L
LISTED
52SJ
O
110-120/220-240V~ 50-60Hz 300W
FUSE: T 8A/4A L 250V 120V/240V
RoHS
Compliant
EU 2002/95/EC
E
S
U
remote
Music On
level
Hold level
control
mute/chime
+10VC
min max
chime
level
F
U
S
E
F
120V
limiter
threshold
class 3
wiring
min max
70V100V 25V
class 2 wiring
min maxmin max
auto mute
sensitivity
com
35 watts
75 watts
150 watts
300 watts
25V, 70V, 100V
20Hz ~ 20kHz
50Hz ~ 20kHz
< 0.2%
-126dBu
> 90dB
> 66dB
500 ms
-10dBu ~ +18dBu
Music
On
Hold
output
xfmr
input
EQ in
pre out
link
off
on
low cut
off
off
on
link
line out amp in
4Ω gnd
2 ms
20:1
Tone Controls:
Treble
Bass
High-Pass Filter:
Power Consumption:
MXA35
MXA75
MXA150
MXA300
Dimensions (all models):
height (2 rack spaces)
width
depth
Weight:
MXA35
MXA75
MXA150
MXA300
Compliance:
peak
trim
min max
channel 5
phantom pwr
on
priority
on
auto mute
on
manual mute
on
-80dB
-20dB
input
peak
min max
5
channel 6
phantom pwr
priority
auto mute
manual mute
-80dB
input
6
±12dB @ 10kHz
±12dB @ 50Hz
12dB/oct. @ 125Hz
< 75 watts
< 100 watts
< 150 watts
< 300 watts
3.47" (88 mm)
19" (483 mm)
9.8" (249 mm)
17.5 lbs. (7.9 kg)
19 lbs. (8.6 kg)
21 lbs. (9.1 kg)
23 lbs. (10.5 kg)
AES48-2005 Grounding & EMC practices
EU Directive 2002/95/EC, RoHS directive
UL / C-UL listed
CCC Certified
CSA tested to UL60065
channel 1
phantom pwr
mic/line
priority
auto mute
manual mute
tel
on
on
on
on
-80dB
-20dB
peak
trim
min max
input
1
on
on
on
on
-20dB
trim
peak
trim
min max
channel 3
phantom pwr
on
priority
on
auto mute
on
manual mute
on
-80dB
-20dB
input
3
channel 4
phantom pwr
on
priority
on
auto mute
on
manual mute
on
-80dB
-20dB
trim
input
4
peak
trim
min max
channel 2
phantom pwr
on
priority
on
auto mute
on
manual mute
on
-80dB
-20dB
input
peak
min max
2
Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. (503) 641-7287 www.biamp.com
11Feb09
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