Jump to content

Bottlehead Crack OTL Headphone Amplifier Build


Recommended Posts

I bought this about 2 months ago and just finished it two days ago. It was a highly enjoyable project from start to finish. I'm a beginner to this kind of stuff and even I did a decent job. I opt'd to forgo speedball install for a month to see if I'll notice the difference.

Custom Work
Stain: Rustoleum Kona
Finish: Rustoleum Poly
Top Plate: Almond Powder Coated ~$25
Transformer Cap: Silver Powder Coated ~$12

Full Photo Album (Imgur)

 

r5RDW4Al.jpg?2

AmTLLwDl.jpg?1

Edited by WhenKittensATK

Share this post


Link to post
Share on other sites

Looks good, is that a standard ECC88/6BK7B tube up front?

 

I've got a couple I've tested through my Aune tube DAC, my favorites so far are a mid 1960s GE "Smokie" ECC88 and a 50(?)'s Zenith red label 6BK7N that I got on recommendation by a tube collector as a great budget tube. The Zenith uses the "higher end" black gates and the GE is the older standard grey gates. The GE is a bit more bass, while the Zenith has smoother mids and a more accurate sound...90% of the time I keep the Zenith in it, but switch to the GE for certain shooters and hip-hop. Ignore what people consider "popular" and "rare"...I've tested $40 tubes against $5 ones back to back blindly by covering them in cardboard tubes and often the cheap tube sounds just as good or better then the expensive one depending on the listener...its almost ALL subjective. The GE Smokie is a great example...its like 10 bucks and is a highly regarded tube for audio use.

 

I love the DAC, but I still need a good amp since the volume is a bit tame on my K7xx's...I'd love to do a build like you did :).

 

I have a local supplier that I can get vintage, matched, and tested tubes for way less then the crazy online prices. He's been collecting for decades and has hundreds of thousands in inventory.

Share this post


Link to post
Share on other sites

Front: RCA 12AU7A

Back: Burroughs 6080? (The only letters I can make out on it are Burr).

 

Right now I'll try some budget tubes 12BH7A and 6AS7G run about $10-30 each. I'll probably give it a week then install the speedball upgrade.

Share this post


Link to post
Share on other sites

I bought this about 2 months ago and just finished it two days ago. It was a highly enjoyable project from start to finish. I'm a beginner to this kind of stuff and even I did a decent job. I opt'd to forgo speedball install for a month to see if I'll notice the difference.

 

Custom Work

Stain: Rustoleum Kona

Finish: Rustoleum Poly

Top Plate: Almond Powder Coated ~$25

Transformer Cap: Silver Powder Coated ~$12

 

Full Photo Album (Imgur)

 

r5RDW4Al.jpg?2

AmTLLwDl.jpg?1

that is awesome. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...