Transimpedance has too much gain?


I’m running an AT33PTG/II through an Andover Spinstage. Overall it sounds amazing but there definitely an emphasis on the 1khz region that makes some records hard to listen to. Its louder than the 20/20 and I have been swapping out parts to find the cause.

could the phonostage be adding too much gain?

gochurchgo

Showing 4 responses by mijostyn

I have been using a transimpedance stage for almost a year. Too much gain is not a characteristic I have encountered. If anything I would not mind even more. "Hard to listen to" usually occurs in the 3 to 4 kHz region where sibilance is a problem.

@gochurchgo 

I had a look at the AT's specs, imp 10 ohms, output 0.3 mv. You definitely do not have a gain problem. That impedance is at the upper limit for a transimpedance stage. As impedance goes up gain drops. I assume other sources do not have this problem? Have you tried other cartridges? Make sure cartridge set up is right (miss tracking). You might also have a look at cartridges with lower coil impedance, ideally you want < 2 ohms. The Spinstage has uniformly great reviews, perhaps you got a defective one? 

@lewm 

I said Ideally. Output levels are still in play. The Spinplay has an input impedance "effectively Zero ohms" 
@gochurchgo 

I have a Channel D Seta L Plus and am very pleased with it. The coolest thing though is recording records with Channel D's Pure Vinyl program. The Channel D units all have pass through outputs, outputs without RIAA correction which is then done by the computer. It is like taking your photos in Raw format. I get to raid all my friend's record collections! Recorded in 192/24 digital you can not tell the difference between the recording and the original unless I kick in the pop and tic removal tool. This one really works. It removes the pop and fills in with the preceding 10th of a millisecond of music. 

@pinwa 

The only turntables that use a single wire ground are the Regas. Otherwise, all you have to do is is remove the RCAs and solder on XLRs leaving pin 1 blank. Pin #2 is positive and #3 is negative. Channel D will also sell you RCA to XLR adapters. I do not like any unnecessary contacts in the way of the cartridge, but if you do not have a soldering iron this is a viable option. 

@pinwa 

Key word is "overpriced." A pair of gold Neutrik male XLRs cost a whopping $10.00.