My gainclone project

[fortney]

I reported this in the Beginner's Gainclone thread, but thought I would present it to a wider audience.

I had never heard a gainclone so decided to build one.
I built a prototype using the Daniel Writes Bac modifications which worked well, but did not work when I built it on perfboard. So I put that aside and built a K-50 kit (LM1875) with the same modifications.
I decided against building a power supply to save on size and weight and instead bought two 12 volt regulated wall supplies from Jameco and wired them together to get +12, 0,-12 volts.
I used a Sony D-33 portable CD player as a source and an Infinity Primus 153 bookshelf speaker.
I liked the sound and it was quite adequate for private listening in the basement.
Since I was doing stereo into mono I added a resistive coupler to the amp.
I was satisfied, but the audio was slightly "thin" so I considered a pre amp and used my JISBOS buffer amplifier (Steinchen, Headwize DIY forum) This added a lot of "presence" to the music.

I am quite satisfied with this setup. It is the first speaker amp I have built.

 

[picowallspeaker]

It is strange that the sound coming out of the portable CDP might be thin :
if it's from the headphones jack, it's amplified so it's 'robust'.

 

[fortney]

Agreed. I used the line out.
I probably should say it sounds "fuller" with more current into the amp and speaker. This is a really good speaker btw.
I also put an acoustic absorber behind the speaker.

So now I am just going to listen to the music.

F

 

[picowallspeaker]

Now it's time for the 'double sequence time aligned', also known as ' stereo'