Chip Amps
Nov 24, 2006 6:27:53 GMT
Post by rickcr42 on Nov 24, 2006 6:27:53 GMT
been some chatter here in the forums on this topic often enough to have its own dedicated thread so being me will do the Martyr thing,spend the moment to pull up a couple of what I think are good starting points (a damn lot of content out there,enough to baffle the chip amp newb )
first let me get the little sh*t over with :
yes i have a chip amp,no it is not my main means of speaker driving,no it is not the best "in house" amp,yes it has pretty good SQ,yes the build was a cake walk and the parts no bank breaker,no,i built mine in the "inverted " mode (just like I do with ALL Op-amps and this is just an Op Amp really just a high powered one ),yes the power supply is damn important and yes an input buffer is a good idea,no,because it is not meant to be my main means of amplifying loudspeakers i have no need for the higher power versions so I am quite happy with the LM1875 as the "engine" and yes likely the least popular Amp Chip if number of builds/supporting web pages is any true indication
Catches his breath,continues........
So here is a nice step by step for a "straight" build,one that should sound pretty good as is though i can not say i have ever actually built or listened to a version of but my take on the overall layout and build is you could do a whole lot worse and likely not a whole lot better
www.briangt.com/gallery/nigc-kit
what would I personally change ?
nothing "on board" but I would buffer the input so here are two potential flavors for your tasting pleasure :
JFET Buffered www.pedjarogic.com/gc/index.html
and Triode Buffered
www.customanalogue.com/diytubegainclone/index.htm
read this page and followthe instruction carefully !
www.customanalogue.com/diytubegainclone/ps.htm
commercial version of the above for layout ideas
www.customanalogue.com/jlti_mark_2.htm
or check the various Gain clone builder galleries
first let me get the little sh*t over with :
yes i have a chip amp,no it is not my main means of speaker driving,no it is not the best "in house" amp,yes it has pretty good SQ,yes the build was a cake walk and the parts no bank breaker,no,i built mine in the "inverted " mode (just like I do with ALL Op-amps and this is just an Op Amp really just a high powered one ),yes the power supply is damn important and yes an input buffer is a good idea,no,because it is not meant to be my main means of amplifying loudspeakers i have no need for the higher power versions so I am quite happy with the LM1875 as the "engine" and yes likely the least popular Amp Chip if number of builds/supporting web pages is any true indication
Catches his breath,continues........
So here is a nice step by step for a "straight" build,one that should sound pretty good as is though i can not say i have ever actually built or listened to a version of but my take on the overall layout and build is you could do a whole lot worse and likely not a whole lot better
www.briangt.com/gallery/nigc-kit
what would I personally change ?
nothing "on board" but I would buffer the input so here are two potential flavors for your tasting pleasure :
JFET Buffered www.pedjarogic.com/gc/index.html
and Triode Buffered
www.customanalogue.com/diytubegainclone/index.htm
read this page and followthe instruction carefully !
www.customanalogue.com/diytubegainclone/ps.htm
commercial version of the above for layout ideas
www.customanalogue.com/jlti_mark_2.htm
or check the various Gain clone builder galleries