hi
i have just built 4 gainclones for a couple of systems and they sound great i used the pre made pcb s from chip amp . com and the lm3875 chips all fine what i want to do next is bridge 4 or g of those to gether for each channel of a power amp i have seen some people have done this before but i cant find any info on the builds anyone have any ideas i see one of them uses a ballanced line driver on the input is this overkill or nessacary when bridging chip amps
any info would be good
many thanks🙂
i have just built 4 gainclones for a couple of systems and they sound great i used the pre made pcb s from chip amp . com and the lm3875 chips all fine what i want to do next is bridge 4 or g of those to gether for each channel of a power amp i have seen some people have done this before but i cant find any info on the builds anyone have any ideas i see one of them uses a ballanced line driver on the input is this overkill or nessacary when bridging chip amps
any info would be good
many thanks🙂
Have you looked at this :-
http://www.national.com/an/AN/AN-1192.pdf
There may be one specific to the LM3875. I used this and have just finished a pair.
I see the pin outs are different but it should work for teh LM3875. I dont know if balanced connection is neccessary.
http://www.national.com/an/AN/AN-1192.pdf
There may be one specific to the LM3875. I used this and have just finished a pair.
I see the pin outs are different but it should work for teh LM3875. I dont know if balanced connection is neccessary.
An inverting and non-inverting input buffer will give you the signals needed for each half of the bridge and will provide a good low impedance drive for the LM3875 chips.
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