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In Reply to: RE: REVIEW: Dynaco Dynaco ST-70 KIT Amplifier (Tube) posted by kimjohns on March 18, 2009 at 17:55:07
I agree. I built Bob Latino ST70 and ST120 kits. Both were a true joy to build and sound fabulous. Can't be beat for value.
Follow Ups:
I already own Bob's ST 70 and I plan on adding the 120 soon. What sonic differences do you notice in these two amps? I'm assuming the 120 will get you better dynamics and a greater sense of ease while retaining the superb musicality of the 70. For the record, I'm using Gold Lion KT 88s ( re-issue ) in the 70 and would use the same tube in the 120. Thanks for your thoughts.
Yes the 120, having more power, will get better dynamics and may better fit less efficient speakers. It is designed to use the KT88. I am using Ei KT-90 tubes in mine. The 70 can be used with a wider range of tubes - I'm using the new re-issue Gold Lion KT-66.
In both I replaced the stock output caps with the Russian K40y9 caps. A nice inexpensive upgrade even recommended by Bob.
Yes, my speakers are 88 db and although the 70 does a great job, the 120 might be a more ideal fit. That said, the 70 isn't going anywhere regardless. You'd be hard pressed to find its equal at a minimum of twice the price. I too am very curious about both the re-issue KT 66 and 77.
The ST-70 is optimized for 5881, 6L6, KT66, and KT77
The ST-120 is optimized for 6550, KT88, and KT90.
My personal preference for the 70 is the KT-66; for the 120, it's the KT-90.
Enjoy.
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