2. analog
  3. 190325-178163

question about Balanced signals.

I just purchased the Audio GD Vacuum HE1 MK3 which has true balanced design.  I have an amp, Rotel 1080RB that is also true balanced. 

my question is regarding sources? what if they only have SE output to the preamp SE inputs?  will I at least get some benefit of balanced signal from the preamp? 

@atmasphere Thinking of you :)  just read "why balanced?" on your website.  I need a pair of ICs since I traded in the integrated amp.  would be nice to know that XLR for under $200 would be better than same budget for SE.  Actually need two pair of balanced since my PS Audio Dac Jr has balanced outputs.  Speakers are Martin Logan ESL-X with a SVS micro sub (system total 6- 8" bass drivers)

dukebdevil
kr4's avatar
kr4
3,677 posts
 

Hmmm.  I've not come across that before.

samssa's avatar
samssa
15 posts
 

What is the purpose of a balanced circuit. If you want it to reduce hum and noise you need a differential input. The signal does not have to be differential but both legs need to have the same output impedance to ground. The input must have the same impedance on each leg relative to ground but should be lower than the input impedance of the driven device.

lewm
13,019 posts
 

All of those criteria are met in a proper balanced circuit. 

Ag insider logo xs@2x
rauliruegas
13,051 posts
 

Dear @dukebdevil :  I have  serious  doubts that your amplifier be a TRUE balanced design as you posted. Please read these:

 

" The voltage gain (into 8 ohms) was 28.4dB via the unbalanced RCA jack. This is slightly on the high side for a THX-certified design, but 6.7dB lower via the balanced XLR jack, which is very unusual. "

That was measures by in real time by STHP review ( J.Atkinson. ).

Additional to that in the manual operation Rotel stated:

" Rotel's balanced design. "

A true balanced design is only that a true balanced design but not Rotel's or Luxman's or whatever manufacturer name.

I think could be better that you forget about your OP with this amplifier.

 

R.

 

gdnrbob
4,444 posts
 

The best man to answer your question is Atmasphere. He practically made 'True Balanced' equipment the norm when most manufacturers only offered RCA.

Bob

More to discover