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"'Cause when love is gone, there's always justice./And when justice is gone, there's always force./And when force is gone, there's always Mom. Hi Mom!" Laurie Anderson, "O Superman (For Massenet)"
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...and I'm very happy with it. Next step is to compare it against my older solid state Stax amp. I got a pair of SR-407 earspeakers with the SRM-006Ts, which sound very good. The new combo is very dynamic & punchy. I must compare those with my SR-507 pair.
I've decided to postpone tube rolling for a while.
Thanks for the great input. I'll post later in a fresh thread.
"'Cause when love is gone, there's always justice./And when justice is gone, there's always force./And when force is gone, there's always Mom. Hi Mom!" Laurie Anderson, "O Superman (For Massenet)"
I have had my SRM-006T for about a year. Very happy with the sound. Using Stax SR700 MKII earspeakers. The combination sounds very very good. Plenty of detail. Bass is surprisingly good. Exceptionally clean sound. I tried some different 6CG7 tube sets. Electro Harmonix tubes came with the amp. I quickly replaced them with RCA clear tops for a nice improvement. I have settled on a pair of Amperex orange globes, which betters them all in detail, ambiance, bass. My favorite.
Using it in an all-vinyl system.
mg16
Edits: 03/18/22
How do you like vinyl playback through head stats? Any drawbacks? What's your signal chain?
"'Cause when love is gone, there's always justice./And when justice is gone, there's always force./And when force is gone, there's always Mom. Hi Mom!" Laurie Anderson, "O Superman (For Massenet)"
I just found a really great sounding tube swap for the Stax SRM-006TA amp.
It is the best I have tried by far.
Ebay has a 6cg7 to 6sn7 adapter for $35 a pair including shipping.I bought a pair, (about 3 weeks shipped from China), and tried all the NOS 6sn7 tube sets I had on hand.
GE 6SN7
RCA 5692 RED BASE
SYLVANIA VT-231All but the GE sounded better than my RCA 6gc7 clear tops
or Amperex 6cg7.
By far, the Sylvania VT231 beat them all.
The phones sounded open and clear before, but they opened up another order of magnatude with the vt-231 tubes.
Front to rear, and side to side depth was vastly improved. Clarity was such, that I could hear faint background voices and extraneous noise picked up in the studio that were absent before.
Much more of a sense of listening to music in the outside air, rather than through phones.Only drawback is you have to leave the cover of the amp off, as the tube and adapter, is about 2 inches too tall to use the cover. I am working on cutting a piece of 1/16" thick black lexan material to fit, with holes drilled to allow the tubes to protrude.
I may try some other 6sn7's, but for now, I am really enjoying the music with the VT-231 in adapters.I believe it's really worth the effort.
mg16
Edits: 04/30/22
Love vinyl through the stats.
I am using a Dennon DP-57M table with Grado prestige gold3 cartridge.
Phono preamp is a Quicksilver Audio phono stage.
It is addictive. I am buying more records than ever.
mg16
Getting back into vinyl is a next step. I have to get a few operational things sorted first. The digital front end needs a new DAC, perhaps a Bifrost. Then, possibly, an equalizer from Schiit. The phono pre is a very open question.Do you select sources from the Stax?
"'Cause when love is gone, there's always justice./And when justice is gone, there's always force./And when force is gone, there's always Mom. Hi Mom!" Laurie Anderson, "O Superman (For Massenet)"
Edits: 03/19/22 03/19/22
Digital is great also. I just have a NAD M51 DAC ,and a decent NAD cd player being used as a transport. Plan to upgrade to a dedicated transport, Love the M51.
I use the balanced inputs on SRM 006T to input the digital. Select input 3.
Vinyl selected on input 1. single ended.
mg16
So the Stax SRM-T1 series and 006 are basically the same circuit, the difference being some of the transistors which were substituted as they became obsolete. The 006 also uses 7815/7915 regulators for the front end power supply whereas the T1 uses zener diode regulators. The 007 also is the same circuit other than running the 6CG7/6FQ7 outputs in parallel for a bit more power, and the Stax SRM-700T is also very similar other than replacing the 6CG7 tubes with 6SN7 tubes. The tubes are run pretty conservatively so tube life is excellent.It's a good circuit, although it could be improved if the output plate resistors were replaced by constant current loads as in the KGST, BHSE, and the Stax solid state amps. This mod more than doubles the effective power by eliminating the power wastage in the plate resistors, tightens up the bass and cleans up the highs.
Personally I prefer a T1 so modded to the Stax SRM-727. Hope this helps.
Edits: 03/18/22
Jim -
Thanks very much for your input.
What are your experiences with tube rolling the 6CG7 tubes?
"'Cause when love is gone, there's always justice./And when justice is gone, there's always force./And when force is gone, there's always Mom. Hi Mom!" Laurie Anderson, "O Superman (For Massenet)"
No experiences in tube rolling personally,, however a couple of people on the HeadCase website have recommended the Toshiba brand, which are relatively inexpensive.
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