Sistrum stand, stillpoints
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GDR,' come in pack of three and one goes on the back, two at front.
Kevin from VAC modified bottom plate of my 300.1 so with little difficulties (cut outs for ventilation), I am still available to use Shun Mook.
Nothing in my personal experience comes close to these devises.
Harmonix is also good but not as natural sounding as GDR.
Shoot me an email, so I can provide you with photos and links to Shun Mook application.
P.S. Did you experience with different KT88's or perhaps some NOS 6550's?
Considering VAC Phi sound quality I would go the extra mile on this. If you have a dealer for HRS and our Critical Mass Systems. I would try HRS first them CMS. You'll be so please about the results. I heard these on fully tweaked systems and the contrasting results with these items in or out is mind boggling.
A late follow-up here, and not on the original topic...
Arthur, when I recieved my 300.1, the switches were in the Ultralinear position. It sounded great and I never tinkered with it...until last night that is.
I switched to triode before powering up and after listening for a while, trying a few different cd's, I found that I was not "getting into it" as I do in ultralinear. There definitely was a fatigue factor going on.
In triode, to my ears, the music sounded much "thinner" and lost some of its "sparkle."
I certainly would not say that triode sounded bad. But, it just did not sound as good as ultralinear, as my ears are very accustommed to.
I switched them back to ultra, and suspect that it may be a while before I feel the need to try triode again.
Thanks for the follow up Bchief! I have come to the same conclusion myself. I have been in Ultralinear for awhile now and have found just as you said Triode, while it still sounds great, seems just a bit thinner and less involving by comparison...happy listening!
BTW, on the topic of the thread, I have a few different types of footers coming in over the next couple weeks for under my Phi 300.1's...I'll report back on what I hear...
I prefer Ultralinear with my Vac Phi 300.1 as well. This seems to be the concensus. That said, I got a different opinion from another party last week. His speaker was quite efficient. I believe in the 94DB range. I don't want to give any details, to respect his privacy. Anyway, he preferred Triode operation, and Balanced as well. This may have had much to do with the preamp he was using, as it may have been optimized for balance operation. My speakers are 87db, and Ultralinear is clearly better. However, if my speaker was more efficient, I would check out Triode again. Barrelchief, I would be curious as to the efficiency of your speaker.
Actually, my speakers are very efficient. I have the Daedalus DA-1, which are 96db.
From my VAC Ren Mk-II pre, I am running single-ended cables, as recommended by Kevin.
I think so much of this comes down to system synergy and personal preference.
Fjn04, since you prefer ultralinear with your 300.1, it would be interesting to see if you prefer triode on your buddy's system, as he does.
I now have Finite Elemente Cerapucs under both my VAC Phi 2.0 preamp and CD source(3 each). Sound got noticeably better - details coming through more clearly and bass got a little cleaner and tighter. I did this a number of months ago and just realized that others might benefit from my findings. They are also pretty cool to look at.....
I am using a pair of Phi 300.1 in balanced mode. I like the triode mode better. My speakers are the ESP Harps. These are 96db efficient. A friend brought over his Bella Extremes which are a fully modded Antique Sound Labs Amps that use V Caps which are Teflon. They are half the power, but seem to be more transparent and more dynamic. He was using Winged C Cryogenic treated 6550 tubes. I don't know if it was do to the tubes or the caps. I know Kevin does not like Teflon. Has anyone else tried these winged c 6550 in there amps.
Barrelchief, thanks for sharing your experiences. Unfortunately, the gentleman I was referring to lives a long way from me, and hearing his system is not realistic. Kevin also seems to prefer Ultralinear, but that was coming from an older phone conversation with him. I will have a different speaker to audition very soon, and it is very efficient. I will definitely give Triode another go at that point. I will chime back with my results. Vacattack, congrats on your Vitus CDP. I heard it at my dealers, and left extremely impressed. Jwm, it's funny that there really are never any unanimous opinions in audio most of the time. I wouldn't think Triode sounds thinner or bleached on your ESP's, or it's likely you would not be preferring it as you now do.
Resurrecting the thread on ultralinear versus triode. I listened my first two months (received the VAC gear this summer) in ultralinear mode. Just borrowed a Decware Torii Mk III 25 wpc amp to see how it sounded in my system. More body/heft, silkier, more delicate mids and highs, and better spaciousness esp front to back. VAC beat it easily in transient speed, articulation, low end control/grip and sheer presence. But...it did make me realize the VAC was lean by comparison. So I decided to try the 300.1a in triode mode. It took the edge off the highs, warmed up the mids, and brought more space and body into the presentation. Much less aggressive sound compared to ultralinear in my system. Very slight absence of total grip on lower registers. My Esoteric MG20 speakers are 89db efficient with nominal load of 6 ohms, dipping to about 4ohms. Eager to hear if anyone has done more comparing on ultralinear versus triode mode and what was gained/lost. And, if I wanted to add more heft (without loss of grip/control) any tube swapping recommednations? Darrin
Darin, I prefer triode as you found out. I'm sorry but to get the sound you want you are going to have to get another phi 300.1 and turn them into monoblocks. Place new old stock RCA black base late 50's tubes in the two middle positions and place Sylvania new old stock 6SN7 in the outer positions. Place tube rings on all eight tubes and you will be in heaven. Jeff