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Torii Mk3 and KT66's (Read 4753 times)
tom collins
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Torii Mk3 and KT66's
11/26/13 at 19:59:10
 
Friends:  After a buddy got his Mk4, I asked him to bring over his Tung-sol reissue KT66s to try in my Mk3.  They definitely put the "power" in power amp.  I was able to buy a quad of Gold Lion reissues.  They have tremendous authority and do not tend to run out of breath as the EL34s can.  I am using Decware ERR's and they will absolutely fill the room up with just a little volume.  The only downside is that the Hazen grid in not used with these tubes so a little of the SET like beauty is given up.  But, with both sets, one can go back and forth depending on mood.
This is like driving the car with the supercharger after driving the standard car.  Worth a try in my book.
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orangecrush
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Re: Torii Mk3 and KT66's
Reply #1 - 11/28/13 at 15:56:11
 
I am using Genalex Gold Lions KT77's (Cyroset) and there are hands down the best power tube I have had in the MK3. They have the authority you mention but without sacrificing that beautiful EL34 midrange emphasis what brought me to the Torrii in the first place.

I did not know you can run KT66's in the MK3. The old MK3 web page only gives these choices:

OUTPUT TUBE CHOICES: EL34 6CA7 KT77 6550 KT88
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« Last Edit: 11/28/13 at 17:33:54 by orangecrush »  
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agustinf
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Re: Torii Mk3 and KT66's
Reply #2 - 12/14/13 at 13:06:50
 
Gentlemen, What kind of music and speakers are you listening to? I'd love to hear more impressions.

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Lon
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"Love without
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Posts: 7696
Re: Torii Mk3 and KT66's
Reply #3 - 12/14/13 at 13:13:13
 
I'd be tempted to try these tubes but. . . "a little of the SET like beauty is lost" . . . due to the Hazen grid mod incompatibility. I'd not like to surrender that, that's the beauty of the Mk III for me. I love the JJ 6CA7s and will be sticking with them at least another year (new cryo'd set in the closet awaiting a swap early in the coming year).
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Decware:ERR,HR-1,ZP3,CSP2+,Torii Mk III,PS Audio PWT+DS,
PowerBases,PPP,AC-12 pcs, Denon DBP-A100, Denon DCD-A100,Rega RP3 +TTPSU,white belt+Exact2, VooDoo Cable:Evo,Ultra Linear, Iso-PodMapleshade:Double Heiix Plus.Samsonv2+v3 +4" platforms,Herbie's Iso-Cup
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Rivieraranch
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Posts: 1274
Re: Torii Mk3 and KT66's
Reply #4 - 12/14/13 at 18:39:28
 
I have been playing my new MK IV a lot with the KT66 tubes I got from Jim McShane. I have to say that the detail is striking. The gain characteristics of the amp are gentle and very much like the Zen and Superzen. It does not distort even at full range. Maybe someday I will look into some KT77 or JJ 6CA7's to see how they would do.
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DECWARE CSP2+, TABOO MK III; SE84CKC; HR1; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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agustinf
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Posts: 32
Re: Torii Mk3 and KT66's
Reply #5 - 12/22/13 at 14:38:02
 
Hi RR,  are you using the 66s permanently in your torii or are you switching with other types of tubes?
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Rivieraranch
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Re: Torii Mk3 and KT66's
Reply #6 - 12/22/13 at 19:47:09
 
I've used only the KT66. I heard a MKIV at DECFEST with EL34's in it and I did not like it as much as with the KT66. I think the inputs offer the most variation of the sound. I am using JJ6922's right now. I ordered some Tesla yellow label PCC88's to see how they'd sound.
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DECWARE CSP2+, TABOO MK III; SE84CKC; HR1; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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DaveH
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Re: Torii Mk3 and KT66's
Reply #7 - 12/28/13 at 17:03:21
 
Actually I was wondering if someone might comment on a Tori Mk III with GL KT77's or similar vs a Torii Mk IV or a mystery amp. I could use a bit moe slam from my Ref 3A GV's. Happy new year to all.
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Mac mini, linear ps, Audirvana +, Oppo 83 Rick Shultz mod, Prism Orpheus Dac, Synergistic tesla, Torii III stepped, V-caps, Ref 3A GV's.
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orangecrush
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Posts: 194
Re: Torii Mk3 and KT66's
Reply #8 - 12/31/13 at 19:26:55
 
I use the Genalex Gold lions KT77 in my Torri III, and they clearly better very other tube I have used. They give immediate boost in authority and low end grunt and fullness without sacrificing any transparency. While they don't use the hazen grid, I don't care, because they sound so good. Fantastic build quality.

How efficient are those speakers?


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DaveH
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Re: Torii Mk3 and KT66's
Reply #9 - 12/31/13 at 20:48:47
 
Thanks for the reply OC. The GV's are 90 db efficient, and have a very flat impedance curve at 5 ohms. Tighter low end would be a plus. Regards, Happy New Year,  Dave H.
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Mac mini, linear ps, Audirvana +, Oppo 83 Rick Shultz mod, Prism Orpheus Dac, Synergistic tesla, Torii III stepped, V-caps, Ref 3A GV's.
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Lon
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"Love without
guts is
worthless!"
Philip K. D*ck

Posts: 7696
Re: Torii Mk3 and KT66's
Reply #10 - 03/13/14 at 21:02:49
 
Well, I bought a quad of Tung-Sol KT-66 from Mike and must say I was very surprised when I put them in the Torii. I love the JJ 6CA7 but these tubes have shown me a muddiness in the mid bass that I wasn't aware of. The midrange as a result seems even more open and the sound is quite big. I'm not always comfortable with that, but imaging and soundstaging are more accurate than usually I find with "big sounding" tubes (mainly rectifiers). These KT-66 are also just a bit more forgiving of source imperfections.

I confess I do hear a bit of the missing detail and "delineation" that I attribute to the loss of the Hazen Grid Goodiness.

Leaving them in a while and enjoying their sound. I see cryoset sells JJs and Genelex as well as the Tung-Sol. Just what I needed, more tubes to roll!
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« Last Edit: 03/13/14 at 21:28:53 by Lon »  

Decware:ERR,HR-1,ZP3,CSP2+,Torii Mk III,PS Audio PWT+DS,
PowerBases,PPP,AC-12 pcs, Denon DBP-A100, Denon DCD-A100,Rega RP3 +TTPSU,white belt+Exact2, VooDoo Cable:Evo,Ultra Linear, Iso-PodMapleshade:Double Heiix Plus.Samsonv2+v3 +4" platforms,Herbie's Iso-Cup
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tgarden
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Re: Torii Mk3 and KT66's
Reply #11 - 03/14/14 at 20:02:20
 
Lon, glad you like 'em.  Have fun!

Mike
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Lon
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"Love without
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worthless!"
Philip K. D*ck

Posts: 7696
Re: Torii Mk3 and KT66's
Reply #12 - 03/14/14 at 20:11:31
 
Thanks Mike. They're sounding very nice, I'm enjoying the change and doing a bit of tweeking to see what's what.
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Decware:ERR,HR-1,ZP3,CSP2+,Torii Mk III,PS Audio PWT+DS,
PowerBases,PPP,AC-12 pcs, Denon DBP-A100, Denon DCD-A100,Rega RP3 +TTPSU,white belt+Exact2, VooDoo Cable:Evo,Ultra Linear, Iso-PodMapleshade:Double Heiix Plus.Samsonv2+v3 +4" platforms,Herbie's Iso-Cup
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kiwidave
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Re: Torii Mk3 and KT66's
Reply #13 - 04/28/14 at 11:25:51
 
Took the plunge (they're not cheap) and bought the Genalex Gold Lion KT77s for my Torri III, based on the positive feedback here.  I've immediately noticed a big improvement over the JJs - I have slightly less efficient speakers (89db) and the extra power/authority means I can relax more into the music - there is a fraction less subtlety and a rawer sound (perhaps this will improve with burn-in) but the upside for my system is so significant that it's not missed - particularly for rock and pop genres it's made some of the source material much more listenable.   Many thanks Orangecrush!

Do you guys have any advice on other tubes that have provided you a significant improvement over the stock tubes for the Torii III?
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Lon
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"Love without
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Philip K. D*ck

Posts: 7696
Re: Torii Mk3 and KT66's
Reply #14 - 06/17/14 at 22:10:30
 
kiwidave, definitely try KT-66.

In reference to the above about "the little bit of SET magic" that is lost with using the KT-66 I would counter that to be honest you lose a little bit of high end detail with the use of these and their not utilizing the Hazen Grid Mod. And for most of the recordings I have on hand that is not a bad thing. The midrange is so open and spacious with these, as well as the bump in headroom.

I've started using a set of Genalex KT-66, replacing the Tung-Sol KT-66. At the moment I'd say the Genalex is tighter and tauter and I might prefer the Tung-Sols expansive warmth BUT these cryo'd Genelax are quite new and my experience tells me they'll change.
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Decware:ERR,HR-1,ZP3,CSP2+,Torii Mk III,PS Audio PWT+DS,
PowerBases,PPP,AC-12 pcs, Denon DBP-A100, Denon DCD-A100,Rega RP3 +TTPSU,white belt+Exact2, VooDoo Cable:Evo,Ultra Linear, Iso-PodMapleshade:Double Heiix Plus.Samsonv2+v3 +4" platforms,Herbie's Iso-Cup
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