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D-75 factory mod for bridged operation


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#1 Progress Hornsby

Progress Hornsby
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Posted 21 August 2011 - 10:37 PM

Purchased a used D-75 a few years ago and have been using this amp in 2 channel (stereo) mode ever since.  Would like to use it in bridged/mono mode now and then but noticed the manual says to have it modified by a factory service center for bridged operation.  I have a (dual/mono) switch on the back of the amp.....does this mean it has already been modified for bridged operation ?

#2 KGring

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Posted 23 August 2011 - 02:03 PM

QUOTE(Progress Hornsby @ Aug 21 2011, 09:37 PM) View Post
Purchased a used D-75 a few years ago and have been using this amp in 2 channel (stereo) mode ever since.  Would like to use it in bridged/mono mode now and then but noticed the manual says to have it modified by a factory service center for bridged operation.  I have a (dual/mono) switch on the back of the amp.....does this mean it has already been modified for bridged operation ?

Good afternoon.
To switch this to bridge-mono, remove the bottom cover. There is a 3-pin header on the main board with a slide on jumper across two pins. Move the jumper to the other side of the header, the amp will be in bridge-mono. The board is screen printed mono on one side and dual on the other.
Kevin B. Gring
Crown Audio
kgring@crownintl.com