@dweller -- a while back there was a thread on the Chinook, and I distinctly remember more than one responder saying the Allnic H1201 and Herron VTPH (sorry, can't remember version) were significantly preferred in comparison. Not surprisingly, there was praise for the Steelhead although obviously at a higher price point. Just dusting off some synapses here and sorry for the sidetrack, but hope it helps.
First impression: Herron VTPH-2A phono preamp
I got my VTPH-2A this morning and it's up and running. After about five hours of spinning vinyl, I'm pretty sure I've wet myself, MULTIPLE TIMES! I've primarily played vinyl that I've had for decades, music that I thought I was intimately familiar with. I was wrong. There's nuance I never knew existed. Everything about the VTPH-2A is "right". The bass is tight, vocals superb, instruments have places, etc. All that I've listened to sounds new and fresh and the most masterfully recorded vinyl sounds live. What I've read about on this forum concerning the VTPH-2A (pretty much all stellar) is true. I've had five different phono preamps and nothing can compete with this, NOTHING. It's a bad ass and definitely a keeper.
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almarg I can see where your coming from Al, the 400ohm is fine, as you say if the output coupling cap is too small there would be some rolling off the bass too early with a 10kohm passive. I just did some calculations and if that coupling cap is 1uf or more all is fine. Do you know how big it is maybe you have one? I have sent an email and asked Keith I will post it up when he reply's. And if it is less than 1uf there's no trouble or much cost making it bigger, and at the same time a better quality one. And the gain can be either: From Herron Gain MC Mode (2 X 12AX7, 3 X 12AT7) 64 dB (4 X 12AX7, 1 X 12AT7) 69 dB Cheers George |
Hi George, No, I don't know what the value of the coupling cap is, as I've never had occasion to open my unit. One reason being that I've never felt tempted to do any tube-rolling with it, and in the process perhaps messing up the voicing Keith has achieved. But in addition to what I mentioned earlier, that the manual recommends 50K or more as being optimal as well as Keith's statement that he would not recommend less than 20K, a few months ago he explicitly recommended to another member that the VTPH-2A not be used in conjunction with a 10K load, stating as follows (quoted by member Uberwaltz in a post dated 4-2-2018 in this thread): Hi Kevin, Best regards, -- Al |
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