Bam!

[Cary]

Just ordered mine yesterday, it will be demonstrated at the Northern California DIY show in October.

[Magnetron]

I have been OK with the low power, unmodded tripath chip amps with the quickie in my bedroom stereo, I anxiously await the bottlehead quicksand.

[fullheadofnothing]

First post edited to add a picture of the underside of the completed amp.

[Grainger49]

I think that there is room for bypass caps and upgraded output caps there. 

It is tiny.  Not at all like my ChipAmp Gain Clone.

[WK3K]

Looking at how clean the underside is, my first thought is: Can this be built into the same chasis/enclosure as the quickie...

Only one way to find out!

 

[denti alligator]

Looking at how clean the underside is, my first thought is: Can this be built into the same chasis/enclosure as the quickie...

Only one way to find out!

 

I don't see how, unless you planned on making the plates at 90-degree angles to one another or on opposite sides of the chassis. But you could probably just saw your Quickie chassis in half (horizontally, of course) and use the two pieces for the two amps.

[WK3K]

I was thinking more along the lines of mounting the PCB to a standoff on the underside of the quickie chassis, hardwiring the quickie output into the quicksand input, then installing the various audio outs and power switch into the base itself. The only problem will be figuring where to mount all those batteries. Maybe on the inside of the base itself...

[Grainger49]

I think it is a natural progression.  But the problem I see is all those batteries!  The Quicksand has 95% of the top of the chassis covered with batteries. 

Maybe put the Quickie batteries under the top and the Quicksand batteries on the top?

If you lead others will follow.

[Paul Birkeland]

The only problem will be figuring where to mount all those batteries.

Yeah, there are a lot of batteries!

[kgoss]

Since battery power is what makes this amp special and there are so many to replace, maybe Bottlehead will offer an upgrade kit to run it from SLA batteries. Something like the upcoming DAC if that would work. Not that those are small, but they could charge when you weren't listening. Anyway just a thought.

[Sonido]

I just saw the picture of the underside and circuitry, and it looks to have a shared/common ground. I thought Class D/T amps didn't have a shared ground? When I was messing with the HE-500 with speaker amps, one of the limitations on using a speaker tap to TRS adapter was the requirement of a common ground, and all of the sub $100 class D/T speaker amps on the market had separate grounding and would go up in smoke if connected with a TRS adapter. And to get a balanced cable generally defeated the goal of a cheap speaker amp solution (to keep it economical). The king of affordable speaker amps for headphones ended being the Emotiva MiniX which is an AB amp and has a common ground, but is also $220. It's nice to see a potential new solution to the affordable speaker amp for headphones quandary.

[Doc B.]

Since battery power is what makes this amp special and there are so many to replace, maybe Bottlehead will offer an upgrade kit to run it from SLA batteries. Something like the upcoming DAC if that would work. Not that those are small, but they could charge when you weren't listening. Anyway just a thought.

Note to PB - I have attached a link to the full bill of materials for the Quicksand SLA battery adapter kit.

http://www.mouser.com/ProductDetail/3M/FDI18-250Q/?qs=SfU69DRKVGBj%252bw1YFkqIaw%3D%3D&gclid=CjkKEQjwodmdBRDm_ZLhorWm68UBEiQAKhO3_TzDJjUcXQ6SeXN3xDP2uRsp9BVJ2xyUV4oStf2a5Wjw_wcB

[Grainger49]

That's FUNNY ! !

[kgoss]

Yes it is and that's why my degree is in computer science not electrical engineering!  Looks like Doc gets to keep the corner office for another week!  Heck, I'll give him the next two weeks!   

[Bonzo]

Another question: it seems headphone output isn't lowered at all (the resistors across the jack seems 0 ohm), isn't it a bit dangerous?

Ciao!