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TVC Promethius versus Bent

Any impressions on differences from this that have tried TVCs from both these companies? Also, I'm not sure why a transformer would help over of a passive resistor based attenuator (assuming a very high quality pot)assuming drive, low output impedance source, low capacitance cables, high sensitivity amp with high input impedance (100kohm). If more is less, why isn't adding a transformer just more, though minimal, distortion? Sort of two questions, but I have a high quality passive volume control, but have an interest in the TVC idea, especially these two brands or something made by Kevin Carter.
pubul57

Showing 6 responses by clio09

clio09
3,363 posts
 
I have the EVS attenuators and compared them to the K&K TVC that I also have (with S&B MkI transformers and Seiden switches). The TVC was better in regards to micro dynamics and overall sound stage presentation. The EVS presented a sound stage that was somewhat less 3 dimensional. Both are quite transparent though and for the price the EVS is a great value.
clio09
3,363 posts
 
Pubul57,

Not sure if you have seen this, but some good information on S&B transformers:

http://www.stevens-billington.co.uk/page102.htm
clio09
3,363 posts
 
Pubul57,

I thought you would enjoy it. The MkI transformers with copper windings have that warmth factor that make them special. It was sitting idle for about a month so over another 50 or so hours it will gradually get even better.

I take it you don't notice any limited bandwidth ;)
clio09
3,363 posts
 
New Bent TAPs are on the way using custom Intact Audio autoformers. According to John he's finishing up the first few production units and then needs a few weeks to stock up on parts.
clio09
3,363 posts
 
I will agree the S&Bs are classics. However, the Slagle autoformers by Intact Audio enjoy a pretty good if not somewhat cult like following. I learned recently that Jeffrey Jackson at Experience Music utilizes them and I have seen a couple other boutique manufacturers using them in their demo set ups at audio shows. Are they going to be as good as the S&B. Not sure, but I'd like to find out. John Chapman mentioned on his forum that if he couldn't get the new TAP to sound as good as the S&B version he wouldn't bother with it. Seems the custom wound autoformers (and John used custom S&Bs as well) are stacking up just fine.
clio09
3,363 posts
 
Unfortunately that was not me who was able to play with a prototype. I actually live in Las Vegas.

I have been in touch with John about building the TAP with a K&K or some other phono stage so it would be full function. It will most likely require a two-box solution, but John was very helpful in explaining the options and how he could accommodate my request.

I'm in a bit of a transition and for the time being am using a VAC Avatar SE integrated with phono to conserve space. Ultimately I think I want to go fully balanced and may wait for John to put out the balanced version of the TAP.
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