Recent content by CoffmanLabs
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Coffman Labs H1-A: Full Review
No problems and thanks for the comments. I am definitely planning to pass these among some of the members for a listen and write-up. At this point, I'm just cleaning up a few final issues. I realized that I needed to add an ultra-low output for the in-ear-headphones. I've done that, but it...- CoffmanLabs
- Post #7
- Forum: Headphone Amps (full-size)
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Coffman Labs H1-A: Full Review
Hi and thanks for the questions. The amount of heat generated is not very great--much less than an equivalent 4 tube 6V6 amplifier running in the 15W range. I use it in my small office for the computer speakers. Regarding output--it will deliver between 1-2 watts to a speaker (4-12...- CoffmanLabs
- Post #5
- Forum: Headphone Amps (full-size)
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6SN7 Tube Addicts
This was a television tube replacement for the 5U4. A little more rugged with a little better current at high voltages. It is a good tube--not used very often. Great replacement in a power amp.- CoffmanLabs
- Post #3,353
- Forum: Cables, Power, Tweaks, Speakers, Accessories (DBT-Free Forum)
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6SN7--continuing on a new thread
Realize that--I'm not selling tubes here. Just noting that the Round Plate 6SN7 Tungsols are basically unobtainium these days.- CoffmanLabs
- Post #5
- Forum: Headphone Amps (full-size)
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6SN7--continuing on a new thread
I was astonished by the number of posts on the 6SN7. As a designer of high-end tube audio gear (coffmanlabs.com) I thought it worth sharing my experience from the design side. YMMV And just to make it clear--I do plan offer some of my products with the 6SN7; I have around 4,000 to 5,000...- CoffmanLabs
- Thread
- headphone-amplifiers
- Replies: 5
- Forum: Headphone Amps (full-size)
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Portland Head-Fi Meet (03/02/13) at Echo Audio - Impressions/Pics
From Damon@coffmanlabs.com A big thank you to everyone for showing up! I had a blast and it was great to meet everyone. We should do more of these if Kurt is up for it. As I mentioned to some of you it was a bit of a scramble for me to get our new Coffman Labs H1-A headphone amp...- CoffmanLabs
- Post #12
- Forum: Local / Regional Head-Fi Meets, Parties, Get-Togethers