pre65 wrote:OK, after a few hours of playing various music I must say I really do like this little chip amp.
True it has got a very low noise PSU, and it is being fed by my Audionote clone (ish) valve pre, but nevertheless, for the price, it's an absolute bargain.
I'm even thinking of getting another one and trying bi-amping on the baffles, perhaps even going to an active crossover.
You can get it even cheaper if you buy it without the box. You need to buy the software and use your pc to set it up, but it's cheap enough. You can also buy a calibrated measuring mike and download some free software to measure your speakers if you're so inclined. Needs a power supply too, but that won't be a problem. I run mine from a battery, which I also use to run the chip amp. Try a battery on the amp Phil, made a good improvement over the power supply I was using before.
I have ordered one. Any idea what the bandwidth is? Is it limited to audio frequencies or will it give most of it's power up to 50khz?
Thinking of it to heat 801a filaments at 50khz AC sign wave generated by my Hameg pure sign wave generator. Compared to lighting transformer. Compared to "quality" DC. Can't see it likely I shall manage LF AC heating as per Rosenblit becaue I don't know what special things he does to prevent the woofers destroying themselves punching the air at 10hz.
For a practical trial.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
Its final destination will be in a pair of little computer monitors using a Visaton FRS8M in a transmission-line enclosure (yet to be built).
In the mean-time, I have the Behringer monitors and a pair of high-sensitivity 12" two-way speakers that I can try it on. The former will give a fair idea of what the amp does at high power, the latter will show up any issues at v.low power.
The circuit itself looks nicely done, so I'm looking forward to attaching some connectors and firing it up.
Andrew I came round yesterday for a chinwag, and we had the chip amp working with the squeezebox on random. To be honest, the chip amp sounded better than the Steptoe amp, and in some respects was as good as the GK-71, and a bit better in the bass,
I think Andrew is going to order one now.
The only thing necessary for the triumph of evil is for good men to do nothing.