Manual-4
80 Hz Highpass Filters
Internal jumpers allow independently selecting 80 Hz,
2
nd
-order Butterworth Filters for each channel. These Filters are
useful when using small bookshelf speakers or small constant-
voltage distribution transformers.
The MA3 is shipped from the factory with the jumpers in the
“no filter” position, as shown in the diagram below. Moving the
jumper to the other position activates the 80 Hz filter. This op-
eration requires removing the top cover and should only be done
by qualified service personel with the unit unplugged.
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 TEL 425-355-6000 FAX 425-347-7757 WEB rane.com
TF 410 & 407 Transformers
The MT 6 rack panel holds up to six transformers installed
on the back, in any combination. Transformers are sold
individually:
• The
TF 407
is a 40W,
70.7 V
transformer with 0.5 dB
insertion loss at rated power and a frequency response of 50
Hz to 15 kHz, ±1 dB.
• The
TF 410
is a 40W,
100 V
transformer with 0.5 dB insertion
loss at rated power and a frequency response of 50 Hz to 15
kHz, ±1 dB.
The MA3 is shipped with the internal 80 Hz High-
pass filters in the bypassed position.
DISTRIBUTED
DISTRIBUTED
DISTRIBUTED
70 V
70 V
70 V
ZONE 3
ZONE 2
ZONE 1
6
12
3
12
6
3
0
0
6
12
3
0
1
2
dB
MA 3
MULTICHANNEL
AMPLIFIER
3
CHANNEL OUTPUT HEADROOM
POWER
POWER
MT 6
MULTICHANNEL
TRANSFORMER
TF 410
LEFT
RIGHT
ZONE 2
OR
ZONE 1
OR
MONO
MONO
EXPAND
8 Ω
8 Ω
70 V
DISTRIBUTED
6
12
3
12
6
3
0
0
6
12
3
0
1
2
dB
MA 3
MULTICHANNEL
AMPLIFIER
3
CHANNEL OUTPUT HEADROOM
POWER
POWER