EMT 948 Built in Phono Preamp Question(S)

[Vann9594]

I have a new to me EMT 948 turntable fully refurbed by Platterdrive in PA. I bought it specifically to have an all in one table setup by using its built in Phono Preamp in conjunction with a EMT TSD SFL. I got it set up too play and fired it up and the output was pretty low so figured out had to turn the gain up on both channels on the line amp board, after that was done output was much better but zero low bass and/or mid bass. I reached out them to discuss and was told these were setup for broadcast use and the frequency started to roll off at 50hz so I would experience a rather thin and flat sound. I hooked it up to my Herron VTPH-2a with the RCA with tonearm adaptor cable that the seller provided me with and it work great with a full and rich sound. Do any of you have any thoughts on what I am experiencing and should I get better results through the built in phono preamp than what I am currently getting?

Thx
Don

 

[DasguteOhr]

I have a new to me EMT 948 turntable fully refurbed by Platterdrive in PA. I bought it specifically to have an all in one table setup by using its built in Phono Preamp in conjunction with a EMT TSD SFL. I got it set up too play and fired it up and the output was pretty low so figured out had to turn the gain up on both channels on the line amp board, after that was done output was much better but zero low bass and/or mid bass. I reached out them to discuss and was told these were setup for broadcast use and the frequency started to roll off at 50hz so I would experience a rather thin and flat sound. I hooked it up to my Herron VTPH-2a with the RCA with tonearm adaptor cable that the seller provided me with and it work great with a full and rich sound. Do any of you have any thoughts on what I am experiencing and should I get better results through the built in phono preamp than what I am currently getting?

Thx
Don

Change the input sut on the amplifer board to lundahl 1:8 stepup LL 1931 Copper or pure silver

Moving coil input - Lundahl Transformers

Moving coil input transformers Moving coil cartridges are low voltage devices. Typical output levels are below1 mV, and often as low as 0.1 mV. In order to generate 12.5W on an 8 ohm loudspeaker, a 0.1V signal must be amplifier 100000 times (or 100 dB). In particular for tube amplifier devices...

www.lundahltransformers.com

you can play a bit with sub filter -3db / 30hz resistor R 758 but you need a lp with test signals und mesurering tools.
Both mods give a lot potential in sound quality

P.S when you change to low output cartrigdes, then you can rewire the Lundahl transformers to 1:16