LOW OUT (SUBWOOFER)

Here’s a special surprise: If you bought the M•2600 amplifier to power a subwoofer system, you just saved yourself the cost of a crossover! The M•2600 amp has an active crossover built in. The amplifier can play the frequencies below the crossover point set with the CROSSOVER switch .

5dB

0dB

–5dB

–10dB

–15dB

20Hz

100Hz

1kHz

10kHz 20kHz

Crossover settings.

Here’s how to configure it:

1.Turn the M•2600’s POWER off.

2.Set the OUTPUT APPLICATION switch to LOW OUT (SUBWOOFER).

3.Select a crossover point, via the CROSS- OVER switch : At 120Hz, you’ll get the low sub-harmonics on up to the audible bass range. At 90Hz, you’ll get the standard subwoofer range. At 60Hz you’ll get the lowest frequencies, more to be felt than heard. You’ll probably want to try this switch each way.

4.Make sure the LOW CUT FILTER is set to OFF or nearly OFF. If it is turned up above the crossover frequency, the output from the amplifier will be greatly diminished.

5.Set the AMP MODE to either STEREO, MONO, or BRIDGED, depending on your application. These three modes operate as usual with LOW OUT (SUBWOOFER) activated, except the speakers just get the lower frequencies.

6.Connect your cords and speaker cables as required (see the examples on pages 13-16).

7.Turn the M•2600’s POWER on. Woof!

If you want to use a second M•2600 or an M•1400i to reproduce the rest of the audio range, follow this procedure:

1.Connect the THRU jacks on the first subwoofer amplifier to the INPUT jacks on the second amplifier.

2.Set the THRU switch on the first subwoofer amplifier to the HIGH OUT position.

3.With POWER off, set the OUTPUT APPLICA-

TION switch on the second amplifier to

FULL RANGE (LIMITER either ON or OFF).

The first amplifier will play the frequency range below the crossover point, and the second amplifier will play the frequency range above it. See the diagrams and further information on pages 13–16. As a general rule, use your biggest amplifier to power the subs.

1 CHANNEL

INPUT

 

 

 

 

 

CROSSOVER

 

BALANCED

LOW CUT FILTER

 

 

 

OR

 

 

 

TYPICAL

60Hz

90Hz

120Hz

UNBALANCED

 

 

 

 

 

 

 

35 Hz

 

 

 

 

 

 

R

STAGE

 

 

 

 

O

F

E

MONITOR

 

 

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

W

 

 

 

 

 

 

B100 Hz

U

S

OFF

170 Hz

 

AMP MODE

STEREO

MONO BRIDGED

TYPICAL

 

 

CH's

 

SUMMED

OUTPUT APPLICATION

 

FULL

LOW OUT

 

RANGE

(SUB WOOFER)

CROSSOVER

60Hz

90Hz

120Hz

 

 

 

 

CHANNEL 2

 

 

 

 

INPUT

LOW CUT FILTER

BALANCED

 

 

TYPICAL

OR

 

 

UNBALANCED

 

 

 

35 Hz

 

 

 

R

STAGE

 

O

F

E

MONITOR

 

 

 

 

 

O

 

 

 

 

W

 

 

100 Hz

 

U

 

 

B

 

 

 

 

S

 

 

 

 

OFF

170 Hz

 

THRU

THRU LOW HIGH OUT OUT

IN

SWITCHED OUTPUT

OFF

ON

TYPICAL

LIMITER

(CH1 & CH2)

THRU

HIGH LOW THRU

OUT OUT

IN

SWITCHED OUTPUT

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