I have been building amps/preamps for years, mostly tube but not all. I built my first chipamp (LM3886) a few months ago and it sounds great. I used the datasheet schematic.
I decided to make one with LM1875 chips just for the heck of it. Power is not an issue, my main speakers have 104db sensitivity.
I was planning on using the datasheet schematic for the LM1875 but was wondering if there are any changes to the datasheet schematic that may improve the sound. I am aware of the AN-1192 paper.
(Yes I know this is very subjective)
I decided to make one with LM1875 chips just for the heck of it. Power is not an issue, my main speakers have 104db sensitivity.
I was planning on using the datasheet schematic for the LM1875 but was wondering if there are any changes to the datasheet schematic that may improve the sound. I am aware of the AN-1192 paper.
(Yes I know this is very subjective)
I am planning on an 18-0-18 transformer so about plus and minus 25vdc.
Post in thread 'Various stuff free or for sale' https://www.diyaudio.com/community/threads/various-stuff-free-or-for-sale.392629/post-7221935
Here is my suggestion for LM1875 with +/-25V supply.
I use 47k resistors.
Attachments
If you built the 3886 amp already….lm1875 amp will not sound that different.
You could try Mauro Penasa RIP MyRef Lm3886 pump or Tom’s modulus86 amp.
I am not expecting it to have much difference. I really am just going to build it out of curiosity and possibly tweaking. I am familiar with the two amps you mentioned.
I guess you know this thread: https://www.diyaudio.com/community/...ion-and-used-in-a-composite-amplifier.346645/
I don't know the whole thread, but there are some working composite amp examples, such as #653 (that's a very similar tda 2050 version, however).
I don't know the whole thread, but there are some working composite amp examples, such as #653 (that's a very similar tda 2050 version, however).