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Blackline M3

+

Electronic controller

features

Dedicated Bl Series controller

Two-way stereo operation

Plug-in Bl system-specific card

Advanced limiter design

19” 1U standard rackmount

applications

Control of Bl Series loudspeakers

Live and fixed installation use

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 © 2007 Martin Audio Ltd.

The M3+ is a versatile system controller, housed in a
single rack unit, which has been specifically designed to
enhance the performance of the Blackline range of
loudspeakers. The M3+ controller provides active
crossover, EQ and limiter functions for the bi-amped
H3T+/H3+ as well as various Bl sub-bass/full-
range combinations.

www.martin-audio.com

overall dimensions

technical specifications

INPUTS 

2 electronically balanced

IMPEDANCE 

20K ohms (10K ohms per leg single ended)

CMRR 

60dB 20Hz – 10kHz

CONNECTORS 

3 pin female XLR

OUTPUTS 

4 electronically balanced

SOURCE IMPEDANCE 

62 ohms

MIN. LOAD IMPEDANCE 

600 ohms

MAX. OUTPUT 

+ 20dBu into 600 ohms

CONNECTORS 

3 pin male XLR

FREQUENCY RESPONSE

-3dB @ 18Hz 12dB/octave
-3dB @ 45KHz 12dB/octave
(ultimately set by system parameters)

DIST NOISE 

0.01% THD @ 2V output (limiters cancelled)

NOISE/NOISE RATIO > 100dB @ 2V output
LIMITERS 

Individual for each channel
Ratio 20:1. Threshold range – 12dBu
to + 12dBu in 16 steps

MAINS SUPPLY 

Captive 2m 3 core cable

MAINS VOLTAGE 

Internally selectable by hard wire link
100-120/220-240V. AC, 50/60Hz
Voltage tolerance on each setting ± 10%

MAINS FUSE 

100-120V and 220-240V: 160mA Type ‘T’ (L)

DIMENSIONS 

(W) 482mm x (H) 44mm x (D) 155mm
(W) 19ins x (H) 1.75ins (1U) x (D) 6.1ins

WEIGHT 2.4kg 

(5.28lbs)

professional

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