Vacuum Tube Headphone Amplifiers - Discussion

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hagtech

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #20 on: 18 Sep 2019, 05:09 am »
Lately I've been using HD600, DT990PRO, SR125e, and Sundara... 

The OTL amps were of my own design; prototypes being tested in the lab.  I don't recall a lot of specifics, as this was 2007, when I ended up selecting an OPT circuit instead, using a 6H30.  Great tube for the job! 

The problem I mention is specific to cathode follower type circuits.  Don't get me wrong, I use them all the time.  Every one of my tube phonostage designs employs one!  I loved the SRPP in my linestage too.  But you have to be careful, as they do tend to go unstable if not operated properly.  Hence, my lengthy diatribe.  Some designs will be better implemented than others.

If you want to see / hear what I am talking about, put a capacitor (say 0.001uF) on the output of your OTL amplifier.  It will be an exaggerated condition, but useful to demonstrate what happens with difficult loads or a marginally stable circuit design.

jh

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #21 on: 18 Sep 2019, 11:39 am »
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« Last Edit: 8 Mar 2020, 10:59 pm by adydula »

wushuliu

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #22 on: 19 Sep 2019, 08:15 pm »
Surprised you haven't tried the Project Sunrise III/Harmony amps. My Sunrise has been up and running for about a month or so and am very impressed. I have a bunch of 12bh7s laying around so I figured it would be a good fit without having to spend money tube rolling. Stock it sounds very good but I did my own little tweaks and parts selection. Depending on the tube the presentation is similar to the T2, APPJ PA1502A, or Asgard 3, even in between. I consider it better than all 3. Currently using EH 12bh7 which seems to have lower noise and better linearity than my NOS versions and the stock 12AU7 it comes with. Some great guitar crunch and drive. ZZ Top never sounded better!

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #23 on: 19 Sep 2019, 08:26 pm »
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« Last Edit: 8 Mar 2020, 10:59 pm by adydula »

Unison845

Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #24 on: 20 Sep 2019, 03:29 am »
My DHT 845 tube amplifier, for driving the STAX Electrostatic Headphones.







adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #25 on: 20 Sep 2019, 12:46 pm »
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« Last Edit: 8 Mar 2020, 10:59 pm by adydula »

jawks

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #26 on: 27 Sep 2019, 03:02 pm »
I've owned a Decware CSP2 for about 5 years now.  I bought it used for the original owner and use it mainly with my vinyl setup, which is also tube amp driven.  I unfortunately haven't done as much listening to vinyl on headphones lately, but I hope to change this in the weeks to come.  I really like the CSP2 and it functions nicely as a preamp, too. 

Albert

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #27 on: 28 Oct 2019, 11:43 pm »
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« Last Edit: 8 Mar 2020, 10:59 pm by adydula »

brooklyn

Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #28 on: 20 Nov 2019, 05:28 pm »
I recently purchase a tube amp I had on my short list for a while, the Woo Audio WA2.. I purchased a preowned unit with an extra set of tubes that supposed to work really well with this amp. I’m afraid when it comes too tubes, I’m ignorant even though I’ve had tube equipment over the years.. I haven’t had to change a tube since owning a Conrad Johnson pre-amp way back when.. Lord knows, I’m not a tube roller so I guess this will give me a chance to get my feet wet.. I haven’t installed the better tubes as I’m still using the factory tubes at this time. I wanted to hear what the amp sounded like before I start the tube rolling process.

So far this amp is sounding like it has a live intimate sound quality to it, almost like you’re sitting at a venue with the musicians close by. The sound tilts just slightly to the warm side. The bass is tight the way I like it and the highs are extended but not harsh or overdone. I first had a problem with a hum for a couple of days until I moved the amp to a new location. I think it was a little to
close to my WiFi unit, now the amp is dead quiet.. 

I’ve now tried the WA2 briefly with all three sets of headphones but most listening has been with the Senn, HD800S their sound is a little more holographic then the others.. This amp put a smile on my face and quite a few hours of very happy listening..  :D

Jerry



« Last Edit: 25 Nov 2019, 04:24 pm by brooklyn »

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #29 on: 29 Nov 2019, 12:33 pm »
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« Last Edit: 8 Mar 2020, 10:59 pm by adydula »

hibuckhobby

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #30 on: 29 Nov 2019, 03:22 pm »
Loved the WA2!  I sold mine thinking that I could improve on it.  I was wrong  :duh:
I'm pretty much done buying now...but if I come across a nice used one, I may just
jump on it.
regards,
Hibuck...

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #31 on: 29 Nov 2019, 05:38 pm »
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« Last Edit: 8 Mar 2020, 10:59 pm by adydula »

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #32 on: 30 Nov 2019, 04:51 pm »
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« Last Edit: 8 Mar 2020, 11:00 pm by adydula »

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #33 on: 7 Dec 2019, 12:52 am »
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« Last Edit: 8 Mar 2020, 11:00 pm by adydula »

hagtech

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #34 on: 7 Dec 2019, 02:10 am »
Quote
This OTL amp has absolutely...

Typo?  I'm pretty sure Mainline uses output transformers (like the Tuba) in order to drive low impedance cans.

j

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #35 on: 7 Dec 2019, 12:46 pm »
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« Last Edit: 8 Mar 2020, 11:00 pm by adydula »

adydula

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Re: Vacuum Tube Headphone Amplifiers - Discussion
« Reply #36 on: 9 Dec 2019, 01:24 am »
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« Last Edit: 8 Mar 2020, 11:00 pm by adydula »