[denden88]

Is there a reasonably priced DIY speaker amp out there that I can build to power a set of bookshelves? My budget is around 200.

 

[Heady]

41Hz audio amp kits. Sounds good to me! Tripath based amplifiers for DIY:ers.

Choose the model from their range. I recommend the amp6 basic, very easy to built and sounds good.

 

[Daveze]

A Chipamp is another highly regarded option, with plenty of room for customising.

 

[joe_cool]

Sorry if this is too techy but I would buy a used Hafler DH-220 or similar and refurbish the amp with whatever is required. I have repainted the heatsinks, rewired the chassis, replaced the panel hardware (fuseholders, jacks, switches, etc.) and actually replaced parts of the chassis (in one unit) to rejuvinate these excellent vintage units. Just a suggestion for the experienced DIY person.

 

[aamefford]

These sites had some interesting schematics:

ESP Projects Pages - DIY Audio and Electronics

Audio Schematics

I think the GainClone is listed in the first link. It is an opamp based speaker amplifier that I've heard some good hearsay evidence about. I know at least one headfier that speaks well of it. I've not seen, heard or built any of these yet. Speaker amps are future projects, so I'm just collecting links.

 

[JustPhilbo]

This is the one that I will be building soon:

SymAsym5 - Project

It has a pretty large following on diyAudio.com.

 

[denden88]

Thanks for the replies. I think I'm going to go with the amp10 from 41hz. Perhaps I'll use it to make my new polk bookshelves active or stick it in the same enclosure with a dac 301. Or with a mini3 as a preamp. Gunna need a three sided coin to flip.

 

[blackinches]

I've looked into National Semiconductor's LM4780. The datasheet is fairly exhaustive and I'll probably develop my own PCB/kit in a few months.

 

[Heady]

Quote:

Originally Posted by denden88 /img/forum/go_quote.gif Thanks for the replies. I think I'm going to go with the amp10 from 41hz. Perhaps I'll use it to make my new polk bookshelves active or stick it in the same enclosure with a dac 301. Or with a mini3 as a preamp. Gunna need a three sided coin to flip.

Good choice.

I built the amp5 on which the amp10 is based. Great sound.

 

[rjad]

Quote:

Originally Posted by JustPhilbo /img/forum/go_quote.gif This is the one that I will be building soon: SymAsym5 - Project

That looks good. Can you get pcb's for this? There is a lot of information on the building thread but I got a bit lost--seems there have been group buys for the pcb, others etch their own. How are you going to go about it?