Rane MA 6 User Manual download pdf (Page 3)

Data Sheet-3

MA 4

MULTICHANNEL AMPLIFIER

Class 2 Wiring

OUTPUTS

Active Low Use Rane VR 2 or 20 kΩ pot

HIGH-PASS

20Hz

40Hz

60Hz

80Hz

4 + – + – + – + – + – + – + – +

REMOTE LEVEL 4

4 FLAG 3 2 1

FAULT

V r Vc V r Vc V r Vc V r Vc –

+ – + – + – + – + – + – + – + –

3 2 1

MASTER

SLAVE

COMP

4 3 2 1

1 2 3 4

+ – + – + – + –

V r Vc V r Vc V r Vc V r Vc

+ – + – + – + –

INPUTS MODE

dBu

SENSITIVITY

dBu

SENSITIVITY

dBu

SENSITIVITY

dBu

SENSITIVITY

EXP ON

INT EXT

LOAD

INT EXT

LOAD

INT EXT

LOAD

INT EXT

LOAD

MA 4

ACN 001 345 482

100-240V

500 WATTS 50/60 Hz

COMMERCIAL

AUDIO

EQUIPMENT

24TJ

LISTED

MADE IN U.S.A.

RANE CORP.

For continued

grounding

protection

do not remove

screw

4 3 2 1

Some Euroblocks removed for clarity

1 2 4 6 9 0 q 5 7 8 3

1 Universal voltage, power-factor corrected, switch mode power supply operates 85 to 260 VAC, 50 Hz or 60 Hz. e supply fea-

tures under and over voltage protection, low inrush current and operates with up to 85% eﬃciency.

2 INPUTS are balanced and accept up to +22 dBu via Euroblock connectors with strain-relief.

3 SENSITIVITY controls allow continuous adjustment from +22 dBu to +4 dBu. Integrated limiter prevents clipping regardless of

input level and sensitivity setting.

4 REMOTE DC LEVEL control ports with Euroblock strain-relief connectors allow audio taper attenuation using optional VR 2

remote (or use 10k to 100k Ω linear pot). Clickless muting may be implemented using a switch, connecting Vr to Vc.

5 A soft knee COMPressor is provided with rms threshold relative to the limit threshold. ON/oﬀ setting eﬀects all channels. is

allows uncompressed operation with typical program material while reducing continuous sine-wave power. Ratio is 3:1; Attack is

1.5 seconds; Decay is 3 dB per second; Soft knee span is 10 dB.

6 Downward EXPander reduces noise in the absence of signal. ON/oﬀ setting eﬀects all channels.

º RMS reshold: –70 dBFS; Ratio: 3:1; Attack: 50 ms; Gain reduction: 10dB/sec.

7 Selectable 20 Hz, 40 Hz, 60 Hz or 80 Hz HIGH-PASS ﬁlters are provided. e setting eﬀects all channels. Filters are 12 dB per

octave, Butterworth alignment.

8 Each channel is set for MASTER or SLAVE operation. Master channels write Fault Flag status. Slave channels read Fault Flag

status.

º e Master setting is used for remote fault reporting and/or automatic redundancy switching control.

º e Slave setting is used for individual channel remote power sequencing or automatic redundancy switching.

9 Individual FAULT FLAG ports are provided for each channel.

º e Fault Flag uses high-side active drive and passive pull down. No fault = +5 volts. Fault = 0 volts.

º Channels set to Master drive the Fault Flag high when no fault is present. Passive pull down pulls the Fault Flag low when a

fault occurs or power is lost.

º Slave channels read the status of the Fault Flag.

0 Ampliﬁer outputs are ﬂoating (not ground referenced) and are not bridgeable. Each channel delivers 100 watts into a 4 or 8Ω

load. Average load impedance is estimated then used to determine the limiter threshold required to limit maximum power to 100

watts and peak current to less than 7.5 amps. Impedance estimation requires a minimum of 3.3 watts and is averaged over 180 ms.

q External ampliﬁer input is used for Internal, automatic redundancy switching.

w Comprehensive front panel metering is included for each channel:

º Four segment, load sensitive headroom meter shows remaining headroom.

º Limiter, Compressor and Expander indicators light when the associated dynamics control is active.

º e Fault indicator lights when a fault is detected

º e Load indicator if oﬀ when impedance is above 16Ω, on when impedance is between 2 and 16Ω and ﬂashing when the im-

pedance is below 2Ω.

º e Ready indicator is oﬀ when the power switch is oﬀ, ﬂashing when the power is switch is ON and the unit is in standby

(Slave channel with high fault ﬂag) and on when the channel is active.

dB Headroom dB Headroom dB Headroom dB Headroom

Limit

Comp

Exp

Fault

Load

Ready

Limit

Comp

Exp

Fault

Load

Ready

Limit

Comp

Exp

Fault

Load

Ready

Limit

4 ON

Comp

Exp

Fault

Load

Ready

1 2 3 4 5 6 7 8

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Rane MA 6 User Manual Page 3

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