Looking for a high-end DiY headphone SS amp

[pidesd]

so in short, you need very good swing and decent current capability...

do you need DC protection, how much heat is enough, can you solder point-to-point, can your source swing a lot already, budget, do you want lowest thd possible....?

 

[Stixx]

QRV08 is too complicated for my taste... the only one I have not built.

My suggestion: Go for the F5 HA (check out the thread) or the DAO.
You will not look back... Quite easily bested my just finished Dynahi

 

[gdan]

Maybe you are interested for another suggestion for a DIY Headphone amplifier:
http://www.diyaudio.com/forums/swap...headphone-amplifier-audioxpress-6-2013-a.html

 

[apexaudio]

I suggest APEX SR PP12
http://www.diyaudio.com/forums/headphone-systems/184355-mosfet-headphone-amp-3.html

 

[BucketInABucket]

Oh dear, so many suggestions; perfect!

Could you guys post basic voltage swing and current specs please?

EDIT: It has to have both differential and single-ended inputs and outputs.

 

[gdan]

Maximum Output Voltage
1.8 Vrms at 8 Ohms
6.4 Vrms at 32 Ohms
7.8 Vrms at 100 Ohms
8.1 Vrms at 300 Ohms

Maximum Output Power
0.4 Wrms at 8 Ohms
1.28 Wrms at 32 Ohms
0.6 Wrms at 100 Ohms
0.22 Wrms at 300 Ohms

You can find more information if you download the article mentioned at:
http://www.diyaudio.com/forums/swap...headphone-amplifier-audioxpress-6-2013-a.html

 

[BucketInABucket]

Maximum Output Voltage
1.8 Vrms at 8 Ohms
6.4 Vrms at 32 Ohms
7.8 Vrms at 100 Ohms
8.1 Vrms at 300 Ohms

Maximum Output Power
0.4 Wrms at 8 Ohms
1.28 Wrms at 32 Ohms
0.6 Wrms at 100 Ohms
0.22 Wrms at 300 Ohms

You can find more information if you download the article mentioned at:
http://www.diyaudio.com/forums/swap...headphone-amplifier-audioxpress-6-2013-a.html

Vrms seems good but current, not so much.

 

[jacco vermeulen]

(if you're really off your rocker, you could drive your planars with Self's 5532 opamplifier. )

 

[BucketInABucket]

(if you're really off your rocker, you could drive your planars with Self's 5532 opamplifier. )

I forgot to say that I wish to stuff everything - board, I/O and power supply - inside a 13" L by 7.75" W by 2.5" H internal diameter enclosure, which really does make me off my rocker.

 

[BucketInABucket]

do you need DC protection

Probably not.

how much heat is enough, can you solder point-to-point, can your source swing a lot already, budget, do you want lowest thd possible....?

I'll be putting everything in the enclosure mentioned above which will be vented from the top only and will look like this (with added holes in the front for outputs of course):

So heat management won't be that great.

can you solder point-to-point

I'd like to think of myself as being proficient with an iron.

can your source swing a lot already

I'll be running it using differential input from dual Soekris DAM1021s which have an output of 3.6Vrms.

budget, do you want lowest thd possible....?

No budget or other spec requirements apart from voltage swing and current output for now, I'm just seeing what's available before deciding.

 

[pidesd]

bucket,

i'd rule out pure class A as temp would build up too much.

Never heard them, but maybe one of "lazycat" design?

vssa, tssa, etc.

...or f5 with low bias(100mA)....or ACA with low bias and 30V or so rails...

or juma's stuff: cubie 2 with higher rails and lower output fet bias....