Martin Audio MA1.3s, User Manual

Page: 5 / 19

Martin Audio – MA1.3s Amplifier
E
NGLISH
5
!
7. Fan grille filters
Two grilles with foam filters are located on the front panel to prevent dust from entering the amplifier. The grilles are
removable for easy cleaning of the filters by simply pulling them off. The foam filters should always be used.
8. Power switch
Turns mains power on or off.
(See page
8
and 1
2
)
4.3 Rear Panel
6 78
1 23
GAIN
CH.B GAIN
CH.A
LINK / BRIDGE A+B
ON
OFF
1+ CH.B+
1- CH.B-
Current consumption: 8.7A
2 3 0 - 240V 50-60Hz
Must be grounded
XLR
Pin 1 Scrn Sleeve
2 Pos Tip
3 Neg Ring
1 /4 “
Made in the EEC by
MARTIN AUDIO
MA1.3s
STEREO
OUTPUT CH.B
CH. B CH. A
Ser. No:
OUTPUT CH.A
Clip Limiter A
O
n
O
ff
INPUT
Clip Limiter B
On
Off
INPUT CH.A LINK CH.B LINK
STEREO
1+ CH.A+
1- CH.A-
2+ CH.B+
2- CH.B- BRIDGE
Pin 1+ Spk+
2- Spk-
GAIN
4 1 dB
3 8dB
3 5dB
3 2dB
2 9dB
2 6dB
2 3dB
2 0dB
1 2 3 4 5 6 ? 4 3 1
8 2
1. Output / Speaker connector
The Speakon connector from Neutrik may be unfamiliar to some users. A full description is found in the operation
section. (See page
1
1
).
2. Clip limiter switch
Turns the clip limiter “ON” (switch IN position) or “OFF” (switch OUT position). (See page 1
3
).
3. Input signal XLR . Neutrik Combijack features also _” TRS phone jacks. (Pin 2 is “hot”, see page 1
0)
.
4. Link Input . XLR male connector connected in parallel to the female for linking the channel to another input.
5. Gain switch channel B . Three of the switches in the DIP-switch selects the maximum gain of the channel to be
either 20, 23, 26, 29, 32, 36, 39 or 41 dB. (See page
5
).
6. Link and Polarity reverse switch . Two of the switches in the DIP-switch are used for Link and Bridge
operation. (See page
6
).
7. Gain switch channel A . Three of the switches in the DIP-switch selects the maximum gain of the channel to be
either 20, 23, 26, 29, 32, 36, 39 or 41 dB. (See page
5
).
8. AC Mains cable. WARNING!
A label just below the mains cable on the rear of the amplifier indicates the selected AC mains
operating voltage. Connect the mains cable only to the AC source referred to on the label.
5 REAR PANEL FEATURES
5.1 Gain switch
The gain switch located on the rear panel (the central DIP-switch) changes the gain/input sensitivity of the
amplifier. This can be useful when using low or high nominal input signals. Most professional mixing consoles
operate at a nominal level of +4 to +6 dBu; the 32dB gain position ensures there is plenty of movement available
of the output fader. For semi professional mixing desks operating at a nominal level of 0dB or -10dB the higher gain
settings of the amplifier can be used.
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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