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atmasphere

Responses from atmasphere

VPI Prime Sig/Lyra Delos / Feedback ...help!
Later that night at higher volumes I'm getting a midrange-low feedback @tommypenngotti Since this is volume related it leads me to think the turntable isn't well isolated from room/air -borne vibration. If it were me I'd be looking at things to... 
Technics SL-1200GAE or VPI HW-40 or …?
@tomic601 The best platter pad we've head so far (most don't work at all) is made by Oracle. It has its own self-adhesive backing.  
Technics SL-1200GAE or VPI HW-40 or …?
So, if you adopt the principle that the mat ought to transmit energy into the platter (I don't disagree), you then have to worry about isolating the bearing and any other sources of noise, like even that which can be transmitted by the belt from ... 
Best investment; cartridge or line stage?
I think this is the wrong question! The reason is simple: the tonearm's ability to properly track the cartridge far outweighs what cartridge you have. The better the arm is at this, the less differences you'll hear between cartridges assuming the... 
Need Guidance for Next/Last Pair of Speakers
If space is an issue, I’d consider using a set of Swarm subs made by Audiokinesis. The advantage here is that the subs are meant to be as close to the wall as possible and will give you 20Hz response without big peaks or nulls in the room. Then i... 
Damping Factor and Overall Negative Feedback.
No speaker made needs over 20:1 damping factor. Most of the time the extra damping isn't a problem but some speakers (certain open baffle designs) might need considerably less to sound right. I heard an example of the extremely low damping factor... 
Technics SL-1200GAE or VPI HW-40 or …?
@arvincastro Good choice.  We used to make a turntable we called the Atma-Sphere 208. IMO it was better than the VPI in every way. More neutral, more speed stable and so on. But I think the Technics is a better machine than our 208 so that is w... 
Microphonics, Feedback and Bob Carver
That is, the resistance to my fingers or external sources is causing the amplifier to respond with enough current to keep the voltage at zero, so it's not a zero sum game, I think. @erik_squires You exert far more energy with your fingers on th... 
A persistent hummmm...
Also, the newer PS Audio are not really.  Try an oiriginal model PS 300 that totally regenerates the AC, as opposed to current models which allow much of the original mains to be included in the output. @ltmandella There's nothing wrong with th... 
Microphonics, Feedback and Bob Carver
Sounds like we're talking about the same thing but using different semantics. Since the amp makes the speaker hard to move, it inherently also reduces any audio signal picked up by the diaphragm. Since that motion would be a tiny amount compared ... 
Looking for 200 watt Amp to drive Dynaudio Heritage speakers
@audio_is_subjective You have a cart to carry your oxen??  
Microphonics, Feedback and Bob Carver
I think it is worthwhile to get very specific. The more feedback the less the speaker’s impedance can affect the amplifier’s frequency response. That is, it behaves closer to an ideal voltage source. OK, that part I agree with, but this question ... 
Damping Factor and Overall Negative Feedback.
Hi, I understand this post is from over 10 years ago, but could you please elaborate further on why, in areas where feedback could be beneficial, a good design calls for minimum or no feedback? It seems like it should be the other way around unti... 
JJ preamp tubes - repeated problems
Funny with the amount of tube amplifiers I see at shows I hardly see this as the product being in it’s twilight. JJ tubes maybe of questionable quality, or filaments maybe getting damaged in shipping? @audio_is_subjective I used that phrase bec... 
Microphonics, Feedback and Bob Carver
@erik_squires The more feedback you have, the less the speaker can affect the amp. Feedback allows the amplifier to reject that which is not the signal and microphonic input from the speaker is an example of that. With more feedback also comes gre...