[tunes]

Haha, swamped this month with the tube input exploration and an Uberamp-RAAL build. Might start a separate thread for that one.

Wonder how this amp compares to the SparkoS Labs Aries

 

[Dukei]

Have no idea as I haven't listened to that one but I would imagine that there would be a gap in sound quality between them.

 

[Drakkard]

Read the thread, soo... Who’s offering cfa3 build?

 

[paradoxper]

Wonder how this amp compares to the SparkoS Labs Aries

Maybe I'll buy one. I know the CFA will embarrass the Aries.

 

[Tarttett]

Read the thread, soo... Who’s offering cfa3 build?

Hi.

A sale listing, for a CFA3 unit, previously had been posted within this forum.

Here is a link for that listing: https://www.head-fi.org/classifieds/cfa-3-current-feedback-headphone-amp.6634.

 

[Drakkard]

Hi.

A sale listing, for a CFA3 unit, previously had been posted within this forum.

Here is a link for that listing: https://www.head-fi.org/classifieds/cfa-3-current-feedback-headphone-amp.6634.

Oh, thanks! Somehow missed it. I through i searched all classifieds here.

 

[Tarttett]

Oh, thanks! Somehow missed it. I through i searched all classifieds here.

You are welcome.

Had you decided that you would purchase that unit?

 

[Drakkard]

Highly inclined to, but checking my finances. It is slightly over what I hoped for

 

[grayw]

Hi All,

Wow - some impressive builds on here

A few questions for you all...

(1) I'm new to DIY audio - is the CFA3 an unrealistic build for me?
(2) Is there any point in building a Dynalo if I eventually end up building the CFA3? (will it sit idle and not get any love next to the CFA?)
(3) As I'm keen to learn / build myself... would any of you be open to helping me build by correspondence (for a fee of course! )

Cheers!

 

[grayw]

Going to SMD components would let you shave at least 30-50% of area mostly by shrinking resistors. TO-92 board footprint isn't much smaller than SMD transistors and board width will be determined by heatsinked output transistors. I dunno, maybe some layouting wizard could make it flat mountable on a 2U heatsink. The problem is that many DIY'ers are afraid of SMD parts.

Thank you for your suggestion for what might be possible for making those amplifiers smaller.

Why are many DIY builders afraid of SMD components?

Re an SMD version of the CFA3 - pretty sure I saw @Kerry on Head-case post pics of an SMD prototype on there..

 

[paradoxper]

Re an SMD version of the CFA3 - pretty sure I saw @Kerry on Head-case post pics of an SMD prototype on there..

Did he post it in the Dynalo thread as I don't recall this post in the ANFSCD thread.

 

[rayofsi]

Did he post it in the Dynalo thread as I don't recall this post in the ANFSCD thread.

It's in that thread. He posted the smd boards. Can't wait to get my Kerry CFA3. One of a handful that have asked him to build them hah

 

[grayw]

Did he post it in the Dynalo thread as I don't recall this post in the ANFSCD thread.

Indeed it's on the ANFSCD thread - second last page I think... A pic of a long blue PCB

 

[paradoxper]

Indeed it's on the ANFSCD thread - second last page I think... A pic of a long blue PCB

Aha! Very cool. I wonder if the specs will remain the same.

 

[drc73rp]

Hope Dukei doesn't mind me sharing it here but we're currently doing an SMD build of the CFA3 that lets us use a shorter and narrower case (the 400mm depth was just too big!). It's a 3U high case but the best part is it allows us to flat lay the amp boards on the side heatsinks for a real amp-like look inside. With this there's so much space left inside it gives you a lot of upgrade options like going dual torroid, relay type attenuator, possibly even a dac board if you fancy that. The overall compactness of the amp is a big deal given they'll most likely end up on a desktop for most users and is one of the reasons I'm moving away from using speaker amps for my TC without losing the power.