Audiotec Fischer match MS 83C-BMW.1 Manuel - Page 13

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Connection and configuration

Connection of the MS 83C-BMW.1

The MS 83C-BMW.1 is a 3-way speaker system that can be configured in two different ways. The system

can either be connected as a 3-way passive system as well as a 3-way "semi-active" system. Both confi-

gurations only differ in the manner the subwoofer is connected.

1. 3-way passive system

In this configuration all three speakers (tweeter, midrange and subwoofer) of each channel are

driven by one single amplifier channel (same as in the original BMW speaker system). Though it is

possible to drive this system with the original radio head unit, an extra amplifier with way more power

is a must to achieve the full acoustical potential of the MS 83C-BMW.1. In this passive configuration

a two-channel amplifier is sufficient as the under-seat subs are simply connected in parallel to the

crossover network for the midwoofers/tweeters in the doors. You can get access to the cables that

are routed to the speakers in the doors by removing the front sill covers. If your amplifier incorpo-

rates an active crossover network with a subsonic (highpass) filter, we recommend setting this filter

to a cut-off frequency of approx. 40 Hz.

2. 3-way semi-active system

In this configuration the under-seat subwoofers are driven by separate amplifier channels, means

that you need four channels in total to drive the complete MS 83C-BMW.1. Two channels of the

amplifier will be connected to the left and right under-seat subs whereas the remaining two chan-

nels will be hooked up to the MATCH crossover networks in the doors. You can get access to the

cables that are routed to the speakers in the doors by removing the front sill covers. If your additional

amplifier incorporates an active crossover network, we recommend the following settings for the sub

channels: subsonic (highpass) filter 40 Hz and the lowpass filter approx. 100 Hz (minimum slope 12

dB/oct.). The other two channels that drive the midwoofers and tweeters in the doors do not neces-

sarily require any additional filtering, but you can set as well a highpass filter in your amp to approx.

100 Hz or slightly above.

Connection of the MS 4X-BMW.1

The MS 4X-BMW.1 is a 2-way speaker system, which replaces the simple original fullrange speakers in

the doors. In several cars it fits instead of the front and the rear speakers as well. The MS 4X-BMW.1 can

be driven either directly by the original head unit or in combination with an additional power amplifier. In

both cases we strongly recommend to use the inline crossover network in order to avoid damaging the

speakers. If you use an additional amplifier that incorporates a DSP or an active crossover, it might be

possible to leave away the inline crossover network. In that case, please make sure that you set your

highpass filter to a cut-off frequency of at least 100 Hz or higher least (a minimum slope of 12 dB/oct.

recommended).

Connection of the MS 8B-BMW.1

The MS 8B-BMW.1 is an under-seat subwoofer, which replaces the original BMW woofers. If you want to

experience the full potential of the MATCH subs we strongly recommend using them in combination with

a separate amplifier. The output power of the original head unit isn't sufficient to drive these speakers pro-

perly. If the MS 8B-BMW.1 is connected to an amplifier with DSP or integrated crossover network, you will

achieve the best acoustical results when setting the subsonic (highpass) filter to 40 Hz and the lowpass

filter to approx. 100 Hz (minimum slope 12 dB/oct.).