MB QUART PAB 2100c: 4 channel full range system

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4 channel full range system

Here we show how to use the 4 channel amplifi ers as straightforward 

discrete 4 channel full range units.

Interconnect cable checklist:

Connect the four inputs of the amplifi er to a Radio/CD with 

quality RCA cables.

Switch setting checklist:

- 1/2CH X-OVER: FULL

- 3/4CH X-OVER: FULL

Crossover frequency control checklist:

Channels 1/2: 

Channels 3/4:

- HI PASS: N/A 

- HI PASS: N/A

- LOW PASS: N/A 

- LOW PASS: N/A

Level control checklist:

Refer to the section “Setting up systems after installation for 

best performance”

Minimum fi nal loudspeaker impedances:

 2 ohm per channel

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2 or 3 channel full range system

Here we show how to use the 4 channel amplifi ers as full range 2 or 

3 channel units by taking advantage of the mono bridging capability 

of all MB QUART amplifi ers.

The following example shows how to create a 3 channel system by 

mono bridging channel pair 3/4. In order to create a 2 channel sys-

tem, simply follow the example to also mono bridge channel pair 1/2.

Interconnect cable checklist:

- Connect the inputs of channel pair 1/2 to a suitable stereo source, 

e.g. a head unit with good quality RCA cables.

- A MONO signal source is required to bridge channel pair 3/4, such 

as would be available from the mono sub bass output of an active 

crossover, whether standalone, or built into a head unit or equalizer.

Important:

Important:

 Do not be tempted to connect the hot, or positive out-

puts,  from  any  source  together  to  obtain  a  mono  signal,  as  this 

could very well damage the output stage of that source.

- It is necessary to feed the SAME signal to both left and right inputs 

via a Y-adapter RCA cable.

- Connect the mono speaker positive terminal to the LEFT +, and its 

negative terminal to RIGHT - as shown.

Switch setting checklist:

- 1/2CH X-OVER: FULL

- 3/4CH X-OVER: FULL

Crossover frequency control checklist:

Channels 1/2: 

Channels 3/4:

- HI PASS: N/A 

- HI PASS: N/A

- LOW PASS: N/A 

- LOW PASS: N/A

TIP:

 If you are using the mono sub bass output of an active crossover, 

there is nothing wrong with switching in the low pass fi lter in these 

amplifi ers for a steeper low pass rolloff.

Level control checklist:

Refer to the section “Setting up systems after installation for best 

performance”

Minimum fi nal loudspeaker impedances:

- 2 ohm per channel in stereo mode.

- 4 ohm mono bridged.

AMPLIFIER APPLICATIONS PAB 4100 4-Channel Amplifi er