MB QUART PAB 2100: English

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MBQR-1

2 way active, or bi-amplifi ed system  with mono bass

This application shows how easily a 2 way active system can be imp-

lemented using a Premium 4 channel amplifi er. Channels 1 and 2 will 

be used for highs, and channels 3 and 4 for mono bass.

Interconnect cable checklist:

We need to feed the same signal to both sets of channels, so must 

use 2 Y-adapters, one to feed the LEFT signal to channels 1 and 3, and 

the right signal to channels 2 and 4, as shown.

Mono bass woofer wiring:

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

negative terminal to RIGHT -.

Switch setting checklist:

- 1/2CH X-OVER: HI

- 3/4CH X-OVER: LP/BP

Crossover frequency control checklist:

Channels 1/2: 

Channels 3/4:

- HI PASS: 100 Hz 

- HI PASS (subsonic): 20 Hz

- LOW PASS: N/A 

- LOW PASS: 100 Hz

Please note that these frequency points are suggestions only. Refer to 

the loudspeaker manufacturer specifi cations and the section “Setting 

up systems after installation for best performance”

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

MBQR-1

2 way active, or bi-amplifi ed system  with mono bass, and faded highs/lows

Here we present a variation of the previous system. Since this is a 2 

way system, we can use the front outputs from a head unit to drive 

the highs, and the rear output to drive the bass This method allows 

the listener to easily adjust the relative levels of bass to highs, with 

the front to rear fade on the head unit.

Channels 1 and 2 will be used for highs, and channels 3 and 4 for 

mono bass.

Interconnect cable checklist:

- Use good quality RCA leads to connect the inputs of the amplifi er 

to the source as shown.

- Follow the instructions as per the previous system for switch and 

crossover settings.

AMPLIFIER APPLICATIONS PAB 4100 4-Channel Amplifi er