Sut?

[mulveling]

Originally Posted by mtroo

Is the SUT in addition to a dedicated phono stage?
Thanks.

Yes, you would typically run from a SUT into an MM phono stage with loading set to 47K and as close to 0 capacitance and as short a cable as possible; any capacitance from the cable or MM stage input gets multiplied by the SUT ratio and reflected back to the cartridge. Running from a SUT into an MC stage can cause all kinds of issues, so don't do that -- you may be surprised that in many cases this actually results in too LITTLE gain, due to the huge signal losses from the resulting voltage divider (and those huge losses definitely happen if your run one SUT into a 2nd SUT then into the phono stage).

The issue is confused a bit because many tube MC phono stages will use in-box SUTs for their MC mode. As usual, switch to MM mode to use an outboard SUT.

SUTs can work great with either tube or solid-state MM stages, but they're a particular favorite with tubes because the (relatively) noiseless high gain they provide can help counteract the higher noise floor of tube stages. I.e. you can run your preamp at a lower volume level for the same net system SPL level, but now with proportionally less noise floor contribution from your tube stage.

[mtroo]

Originally Posted by mulveling

Yes, you would typically run from a SUT into an MM phono stage with loading set to 47K and as close to 0 capacitance and as short a cable as possible; any capacitance from the cable or MM stage input gets multiplied by the SUT ratio and reflected back to the cartridge. Running from a SUT into an MC stage can cause all kinds of issues, so don't do that -- you may be surprised that in many cases this actually results in too LITTLE gain, due to the huge signal losses from the resulting voltage divider (and those huge losses definitely happen if your run one SUT into a 2nd SUT then into the phono stage).

The issue is confused a bit because many tube MC phono stages will use in-box SUTs for their MC mode. As usual, switch to MM mode to use an outboard SUT.

SUTs can work great with either tube or solid-state MM stages, but they're a particular favorite with tubes because the (relatively) noiseless high gain they provide can help counteract the higher noise floor of tube stages. I.e. you can run your preamp at a lower volume level for the same net system SPL level, but now with proportionally less noise floor contribution from your tube stage.

Thanks for the response.

[Chubba]

I am using a RWR Audio MCT-1 sut with internal dip switches for gain and impedance matching.The cart is Dynavector 20x2l and mm phono stage is a Graham Slee era gold.This goes into a Sonic Frontiers SFL-1 preamp then Mc 252 amp and Klipsch RF-7II.The table is a Music Hall 9.1.I think it all sounds enjoyable.

[robd2]

Originally Posted by PHC1

http://www.rothwellaudioproducts.co....rs_explai.html

This was a great article PHC, thanks for sharing. It's a difficult read but lots of good info in here. Also helped to explain the cart loading reasoning.

[PHC1]

Originally Posted by robd2

This was a great article PHC, thanks for sharing. It's a difficult read but lots of good info in here. Also helped to explain the cart loading reasoning.

Glad you found it interesting.

[robd2]

Anybody ever take the Rogers PH-1A for a test ride? Certainly a conversation piece with the way it looks.