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Betsy Open Baffles and VTA Dynaco ST-70 (Read 1623 times)
DanG
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Posts: 9
Betsy Open Baffles and VTA Dynaco ST-70
03/27/19 at 01:50:14
 
Hello All, first-time poster. Discovered Decware and Caintuck via the Steve Hoffman Forum.

I'm enjoying my new Caintuck Betsy Open Baffles. I'm waiting on delivery of an SE84UFO.

I am listening to the Betsyís using my VTA Dynaco ST-70 (described in my signature). But, never having heard a SET amp, Iím guessing Iím not hearing the Betsyís to their full advantage, as I will when I receive the SE84UFO.

Comments? I think the VTA ST-70, which I like very much, and which has wonderful NOS Mullard tubes, is push-pull, or ultralinear. This past weekend I tried triode mode, which I didn't much like when I used this amp with my previous speakers (Dalquist Compact DQM-9 Speakers, 25/140 min/max watts, 92dB sensitivity, purchased circa 1983). But triode modes seems very nice with the Betsy's. Still not the real deal, though.

Anyway, I'd appreciate your thoughts. My guess is that the SE84UFO will take the Betsy's up to a whole nother level, lifting the sound stage, and providing more bass.

Thanks.

Dan
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Decware SE84UFO Beeswax Bypass Cap Mod
Caintuck Audio Betsy Open Baffles
Dayton Audio Sub-800
Marantz SA-8005 SACD
Don Sachs PH16 Phono Stage
Mission 775 Turntable, Mission 774LC Tone Arm, Audio Note IQ3 cart
(3) DHC-1
Herbie's tube dampers, tenderfeet
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Lon
Seasoned Member
****


"Love without
guts is
worthless!"
Philip K. D*ck

Posts: 16665
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #1 - 03/27/19 at 12:39:43
 
It's been a long time since I've heard a Dynaco amp; I grew up with my Dad's Dynaco system of tuner, preamp and amps.

I'd say you'll get a very different sound with the Zen amp. A more detailed, dynamic, clear sound. Better soundstage most likely. DIFFERENT bass, tighter and more controlled.
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HR-1,ZTPRE,ZBIT,ZROCK2,SE84UFO3-25th x2, CSP3-25th.Taboo Mk IV; Rega RP3 w/25th mods PS Audio: DMP+DSD,P15,NPC,PowerBases,AC-12 pwr cbls, Statement spkr cbls; Mapleshade:Samson V3; Oppo UDP-205; VooDoo:Cremona+Amati intrcncts, Iso-Pods; headphones: PM1,HD800S,LCD-
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Randy in Caintuck
Seasoned Member
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Tube be ... or not
tube be ... it's a
no-brainer.

Posts: 814
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #2 - 03/28/19 at 16:27:56
 


Hi Dan,

I'm very pleased to hear that you are enjoying your Betsy baffles ...

Over the 40+ years of my audio journey, two modified Dynaco ST-70 graced my system. At the time, all of my speakers ranged from 88 to 92 DB sensitivity and the Dynaco amps did a good job of driving them.
The Dynaco amps were easy on the ears and I considered them very "musical" sounding. I also owned a Conrad Johnson MV-50 and an Audio Research VT-100 which I enjoyed quite a bit.

I still consider all three of those amplifiers to be fine sounding components ..... however, the first time I heard a Decware SET (an SE84B), it totally changed my concept of imaging, soundstaging, focus and clarity ...

The current Decware SE84UFO is certainly even better than the vintage SE84B and I think that you will be very happy with it in your system.
It has plenty of power to drive the Betsy baffles and I have that combo in my home listening room.

I agree with Lon about the bass ..... there won't be "more" ..... but it will be tighter and more controlled with greater detail.

If deeper bass is needed, it's easy to add a third baffle with a larger driver powered by a subwoofer amplifier or any good quality powered subwoofer.

You are in for a treat when the SE84UFO arrives .....

Happy listening,
Randy

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CEC TL5N belt drive CD transport
Camelot Uther / Anagram DAC
U-Turn Audio Orbit Plus turntable
AudioQuest DragonFly Red USB DAC / tablet
Schiit Audio Eitr USB to RCA converter
Decware SE84UFO amplifier
Caintuck Audio Betsy Open Baffles and Alpha bass baffles
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DanG
Verified Member
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Posts: 9
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #3 - 03/29/19 at 02:11:58
 
Lon, thank you for your reply.

My dad had a Fisher integrated amp and tuner. That's how I got interested. Smiley Can't remember what the turntable was.

I got into tubes myself many years later with a refurbished Dynaco ST-70. Then I moved into the "modern" VTA Dynaco ST-70 by Roy Mottram and Bob Latino. It mostly stays loyal to the original design, but improves reliability, and addressed original Dynaco cost cutting design. This is the amp I'm still using until the SE84UFO comes.

Thanks for the feedback. I'm really looking forward to hearing SET sound.
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Decware SE84UFO Beeswax Bypass Cap Mod
Caintuck Audio Betsy Open Baffles
Dayton Audio Sub-800
Marantz SA-8005 SACD
Don Sachs PH16 Phono Stage
Mission 775 Turntable, Mission 774LC Tone Arm, Audio Note IQ3 cart
(3) DHC-1
Herbie's tube dampers, tenderfeet
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DanG
Verified Member
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Posts: 9
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #4 - 03/29/19 at 02:55:32
 
Randy, thank you for your reply. It's special to be able to discuss the Betsy's with the inventor. † Smiley

I'm glad to hear you considered the Dynaco amps "musical." I haven't had a lot of exposure to different amps, speakers, and systems, but I feel my Dynaco system has been sweet. (I forgot to mention I also had a modded Dynaco PAS-3 in there, too!).

I'm really looking forward to the Decware SET. I've been totally unaware of SET until recently. A whole new, exciting world to explore.

It feels like I'll have to hear it to understand SET, it's not something that can be explained. So I'm enduring the wait until the SE84UFO arrives by reading everything I can about it and the Betsy's. Smiley

And everything I've read and seen indicates the SE84UFO and Betsy Baffles are wonderful together. I enjoyed the video Steve made showing off the Betsy's. I even purchased one of the CDs used in the demo, Bob Barnard's Cornet Chop Suey.

Randy, thanks for the Sampler CD! I'm enjoying the music. Some of it I know, most of it is new to me. Very nice. The CD also sets my mind at ease. This is music that will show off the SE84UFO/Betsy system to its best advantage, so I feel certain I will enjoy it when the SE84UFO arrives.

Thanks again!
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Decware SE84UFO Beeswax Bypass Cap Mod
Caintuck Audio Betsy Open Baffles
Dayton Audio Sub-800
Marantz SA-8005 SACD
Don Sachs PH16 Phono Stage
Mission 775 Turntable, Mission 774LC Tone Arm, Audio Note IQ3 cart
(3) DHC-1
Herbie's tube dampers, tenderfeet
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Geno
Seasoned Member
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Without music, life
would be a mistake.
Nietzsche

Posts: 838
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #5 - 03/29/19 at 03:42:39
 
Dan,

Iíve had the SE84UFO/Betsy Baffle combo for a while now and could not be happier. The Betsyís are the part of my system Iím not interested in changing. They put a smile on my face every time. And when you consider the price/performance ratio, they are unbeatable.

Also, I got two of Randyís 12Ē bass baffles and I drive them mono with one of his plate amps. This fills out the sound perfectly.
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SE84UFO(25th Mods)
CSP3
PS Audio DSDAC JR / Cambr.Audio CXC / LRaven AudioPC / ZBIT
Technics 1210MK5(KAB Mods)-KAB/Ortof ProS 40 cart / ZP3(25th Mods)
Otari MX5050 R2R
Decware ZLC
Alnico Betsy Baffles OR Crystal 10 Baffles
(2) 12" Lii Bass Baffles
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Lon
Seasoned Member
****


"Love without
guts is
worthless!"
Philip K. D*ck

Posts: 16665
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #6 - 03/29/19 at 16:06:46
 
You are going to fall in the love with the SE84UFO. It's no shame. . . many here are also able to sing "I Fall in Love Too Easily". . . .
Wink
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HR-1,ZTPRE,ZBIT,ZROCK2,SE84UFO3-25th x2, CSP3-25th.Taboo Mk IV; Rega RP3 w/25th mods PS Audio: DMP+DSD,P15,NPC,PowerBases,AC-12 pwr cbls, Statement spkr cbls; Mapleshade:Samson V3; Oppo UDP-205; VooDoo:Cremona+Amati intrcncts, Iso-Pods; headphones: PM1,HD800S,LCD-
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DanG
Verified Member
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Posts: 9
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #7 - 06/22/19 at 14:35:44
 
Status report on the Betsy's with my VTA ST-70. I now have over 200 hours on the Betsy's. I'm impressed by how fast they are. Also, the sound stage is bigger. And the bass is better, more detailed.

While the VTA ST-70 isn't SET, it's been enjoyable with the Betsy's while I get some hours on them. My SE84UFO should ship in a few weeks. I'm looking forward to finally having the SE84UFO and the Betsy's together.
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Decware SE84UFO Beeswax Bypass Cap Mod
Caintuck Audio Betsy Open Baffles
Dayton Audio Sub-800
Marantz SA-8005 SACD
Don Sachs PH16 Phono Stage
Mission 775 Turntable, Mission 774LC Tone Arm, Audio Note IQ3 cart
(3) DHC-1
Herbie's tube dampers, tenderfeet
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Geno
Seasoned Member
****


Without music, life
would be a mistake.
Nietzsche

Posts: 838
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #8 - 06/22/19 at 19:21:07
 
Hi Dan. Iím right behind you on the waiting list. I have a Zbit that should be updated from new to parts pulled next week.

Yep, youíre gonna love the Betsyís with youíre new SE84UFO. A great match.
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SE84UFO(25th Mods)
CSP3
PS Audio DSDAC JR / Cambr.Audio CXC / LRaven AudioPC / ZBIT
Technics 1210MK5(KAB Mods)-KAB/Ortof ProS 40 cart / ZP3(25th Mods)
Otari MX5050 R2R
Decware ZLC
Alnico Betsy Baffles OR Crystal 10 Baffles
(2) 12" Lii Bass Baffles
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DanG
Verified Member
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Posts: 9
Re: Betsy Open Baffles and VTA Dynaco ST-70
Reply #9 - 06/24/19 at 13:54:58
 
Thanks Geno. I'm really looking forward to it.

From all reports, yours included, I only hear that the SE84UFO and the Betsy's are a great match. I'm beginning to understand about the importance of a proper match in equipment. I guess I'm concluding that my VTA ST-70 and the Betsy's are not the best of matches.

I have high expectations about the SE84UFO and the Betsy's, knowing that they're a good match. Can't wait. †:)
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Decware SE84UFO Beeswax Bypass Cap Mod
Caintuck Audio Betsy Open Baffles
Dayton Audio Sub-800
Marantz SA-8005 SACD
Don Sachs PH16 Phono Stage
Mission 775 Turntable, Mission 774LC Tone Arm, Audio Note IQ3 cart
(3) DHC-1
Herbie's tube dampers, tenderfeet
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