Stainless steel with graphite mat
no matter if you use Boston audio, OMA or Audosilente mat the effect can always be described positively
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The American Sound Turntable- Beyond's Minimalist!
- Thread starter ddk
- Start date
no matter if you use Boston audio, OMA or Audosilente mat the effect can always be described positively
If you're not familiar with using tubes, it might seem that way from just looking at the specs. Depends on what is meant by "a lot".
I have the ML2.2 monos and Lamm suggests replacing a single tube (6NP) in each amp once every two years to maintain top performance. You do need to set the bias for new 6C33Cs which is simple as there are adjustment ports and ports for a meter. Once set they are stable. For the ML3, Lamm reccommends replacing the GM-70 every 1-1.5 years.
My LL1.1 preamp (4 boxes) is pretty simple. It uses 6H30s in the control units and a 6X4 in the power supplies. The 6H30 which I also had in my ARC Ref components has proven to be very long lived.
I've not had tube issues for either units. Tube replacement is generally simple, or at least to me it is as I've had tubes in all my gear but for a couple early phono stages. The trick is to keep extra stock on hand.
When Vladimir designed his units, Russian tubes were somewhat unusual and Lamm still says they are the only source for a few pieces. That is no longer true and I've had no problems sourcing from around the globe. Lamm does do excellent testing and burn-in.
Both your choices are excellent, fwiw.
This is what I don’t get about the ddk approach. Extreme measures taken to have a source which doesn’t impart any vibration yet in some cases old wooden speakers with no resonance control. How can this be natural sound if you’re adding onto and altering the original source material? It can’t be.
I am surprised his TTs aren’t made from big slabs of oak or walnut…that would be more consistent…
Well if this is the compression driver / horn DDK uses it might be a different story .
Most of the freq range 700 hz - 8 khz is handeld / can be handeld by this combo.
The horn is probably Cast aluminium and you know how they made things in those days .
Built to last / and they didnt skip on material thickness in those days .
The woofer is also in a frame if i saw correctly .
The wood is only there to limit the acoustical short cut / cancelling i reckon
Compression drivers / Horn FR graphs ( Vitavox S2 )
This is a thread to combine info regarding characteristics of compression drivers / horn combinations. (incl Vitavox S2) http://unepassionaudiophile.fr/wp-content/uploads/2018/01/Horns_measurements_ETF2010d-1.pdf
www.whatsbestforum.com
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Resonance control is interesting. The American Sound turntables manage and direct resonances, they do not eliminate them. Same with the SME 3012R tonearm. If you kill them completely by overdamping, you run the risk of killing the life in the music. The key is to find the right balance. Same with room set up. Not always easy. This is where listening for what sounds most natural comes in.
You can get just as magical a sound, but slightly different, with the Lamm ML2. And you don’t have as many tubes. Ideally, you just need speakers that are over 100 dB and preferably 16 ohm.
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DDK must have got this inspiration from my No. 1s. Every day as I evacuate my bowels, I also begin the slow lowering of my 150kg platter onto the outer rim of my toilet seat. My bearing remains protected and untouched. Sometimes nature shows us the way.
the question is if you have enough air to get "airborne" again......
Howie has 5 strong moving men ready to lift the "platter" !the question is if you have enough air to get "airborne" again......
About 150 lbs. The platter on T Question he Absolute Nothing is both wider by an inch or two and much taller. We did not do the free spin test on the new turntable, but on my AS2000, the platter takes half an hour to come to a complete stop from 33 RPM when free spinning.
It is the same motor, but there are a lot of changes to the controller and to the motor housing. The flywheel is also different. There is very fine thread tensioning adjustment. And the strobe display for speed adjustment is very cool.
I forgot to mention that the new motor housing is almost the size of the AS2000 main chassis. It has new isolation and its own dedicated platform for further reduced vibration transmission.
If anyone is interested in purchasing a brand new-in-the-box, never used, AS-2000 turntable please contact David Karmeli directly or I will put you in contact with David.
@PeterA
With such a massive platter, if you turned on the motor without giving the platter a push would the platter start moving or would the thread just spin around the motionless platter? Just curious, that’s all.
My Galibier Gavia has a 33 lb platter but it rests on a ceramic ball, not air, and it has a moderately tight Mylar belt, not a loose thread. The Galibier motor can get the platter up to speed on its own but I always give it a push to make the job a little easier.
With such a massive platter, if you turned on the motor without giving the platter a push would the platter start moving or would the thread just spin around the motionless platter? Just curious, that’s all.
My Galibier Gavia has a 33 lb platter but it rests on a ceramic ball, not air, and it has a moderately tight Mylar belt, not a loose thread. The Galibier motor can get the platter up to speed on its own but I always give it a push to make the job a little easier.
Hello Salectric, the platter does actually start spinning, but very slowly and it will take a long time to get up to speed so I help it along with my fingers giving it a couple pushes. But it will get there on its own eventually. I think the reason for the non-slippage is that there is, very little baring friction, even though the platter is massive. The thread is pretty loose. With the platter floating on the air, I can pull the thread in either direction and the platter and motor pulley will turn and the thread will not slip. If the platter is not elevated and resting on the base with no air pressure from the pump, then pulling the thread will get it to slip as there is no possibility of moving the 140 lb platter.
I use a special cotton Kevlar thread came with the turntable as an option to the non-stretch belt. It is very strong and not smooth. I have tried other threads that are smoother but this sounds excellent.
Thread tension and thread length make a difference and are audible. The trick is finding the right balance. One wants to minimize the effect of the motor on the platter while still maintaining some control of the platter speed. The more inertia and less friction the better for stable platter speed. Lowering the influence of the motor on the platter reduces noise and results in a calmer and more natural sound.
Interesting picture. It looks there is a component (a Lamm LP2.1 phonostage?) between the motor and the platter. That is quite a distance.
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