SUT Interconnects


What cables have you tried between an MC SUT box and 47K MM phono stage? What was your favorite?

I’ve tried the AudioQuest upper-line "normal" ineterconnect cables (Sky, Fire) - great cables in other slots - but very colored coming out of a SUT. Not great performance. I assume that at 1.0m+ lengths, their capactitance is far too high for this application. I’ve tried 0.5m runs of Wind & Niagara (a bit lower in their "normal" IC line, slightly smaller guage wire and less shielding to boot) and got better results. However, my best results by far are with a 0.5m AQ WEL Signature LP phono cable (optimized for low capacitance phono applications). I’ve also tried the Bob’s Devices custom cables, 0.7m, both copper and solid silver versions - these have good performance (particularly the silver), but are more on the level of the 0.5m Niagara, still short of the WEL LP.

The problem I have is that the WEL LP is quite spendy, and I want a 2nd good SUT cable for a 2nd arm & SUT setup. Looking for more reasonably priced options. I’ve had excellent results with a Synergistic Research Foundation phono cable on a tonearm (DIN plug), and wonder how a short all-RCA run of it might do off a SUT (also interested in the Atmosphere X series). Any experience with SR or other cables off a SUT would be appreciated!

Ed430d47 c595 4a82 8f69 3edcb7ac3455mulveling

My Verion - aka Cotter - Type P SUT came with a captive lenght of Verion Tri Axial cable for its outputs. IMO still one of the best SUT’s ever! I paid $375 for mine in 1978! Used with the GAS Sleeping Beauty (Coral 777) mc cartridge. Word to the wise: keep any cable from the SUT output jacks short to avoid capacitive roll-off of highs!

The lenght of the Verion cable off the SUT was about 12 inches. I still have six pairs of the one-meter Verion RCA cable pairs! Alas, they remain buried in storage!

.5 meter atlas element integra tonearm cables, low capacitance. Also, rothwell the river .5 meter interconnects...these sound a bit brighter than the atlas to my ears. They are silver plated copper. A well shielded cable is a must to reduce noise and hum. The same cable should be used from TT to SUT. You can use whatever interconnect you want from the phono preamp to your integrated/preamp. For that, I use an Atlas elements integra conventional interconnect. My goal is to keep the sound Signature consistent from TT to the integrated line input. My preference is the Atlas cables, they seem to be neutral. I use two different SUT’S, the Jensen mc-2rr-l (made in USA, 1:10 ratio, 430 ohm input impedance) and the Rothwell mcx (UK, 1:10 ratio, 100 ohm input impedance). My cartridge of choice is the Hana EL (.5 mv, >400 ohm) and Goldring Eroica LX (.5 mv, 100ohm) They are a good match to both SUT’s, impedance loading wise, as well as step up ratio requirements. Yes, my set up is low budget in relative terms, however, the cables and SUT’s are of high quality. If I were using a cartridge worth thousands, and a turntable like Mike Fremer’s, then maybe I’d spend more...what I got is fine to my ears.

Auditorium23, also used as a tonearm cable. 

I had also used the Bobs silver plated copper but switched to the 

top line Anti-Cable and or top line Morrow silver, 

all .5 M.

What ever Denon used in the AU-320 SUT for the output cables seems to work really well.

 

BillWojo

My Fidelity Research FRT-4 has a captive cable, with verry common rca connectors and a ground wire.

I sometimes think of changing it, but it sounds great, gives me no trouble, doesn't lose contact or give intermittant balance issues like some flexible jacks like these do.

Entre ET-100 lets you use your own cable.

 

 

 

Captive, low capacitance, short length leads are best, sometimes known as "flying leads", because the leads are directly soldered to the transformer secondaries inside the chassis of the SUT, at that one end. That way you at least eliminate an RCA jack and plug in the signal path and effectively minimize capacitance. But if you must traverse a distance of 3 ft or greater from cartridge to phono inputs, it would be preferable to have shortest possible (flying) leads on the cartridge to SUT side and make up the remaining distance on the SUT to phono inputs side.

@lewm

The "flying leads" makes sense, thanks. But as far as optimizing total run length to a phono 47K input - I always though it was more critical to keep capacitance low AFTER the SUT, rather than BEFORE the SUT, becasue of the after-SUT’s capacitative load supposedly "reflecting back times the sqaure of the turns ratio" (i.e. the opposite of what happens to load resistance)? I don’t pretend to understand the electrical theory behind this. What’s the theory behind prioritizing the tonearm to be as short as possible? My tonearm cables are all the "standard" 1.2m, but I definitely don’t need all of that length.

I try to use a short length of whatever I'm using as a tonearm cable.

@mulveling , The advantage of making your own cables is being able to keep them as short as possible. If you use a high bandwidth balanced cable like Canare Da206, use the two inner connectors for signal wires and connect the shield only at one end ( I usually use the load end), you will have a better cable than you can possibly purchase. You will also save a pile of money which you can spend on music.