Additional Information:
Thanks for your responses so far. I did some additional checking and the Adcom GFP750 is supposed to have true differential balanced circuitry. Nelson Pass stated "the performance is best when it is run balanced." The DAC 3.0 is fully balanced so DAC to preamp should be fine without any balanced to unbalanced circuit changes. I think the DR25 may be the weak link. I cannot find any literature whether it uses fully balanced circuitry or not. I have read posts both ways. It is an older amp, but still quite good, and was originally $4000. I would think they would have not cut corners on an item in that cost range, but even the owners manual is not clear on whether the circuitry is fully balanced. I am also worried about a thinness in the sound some have talked about when running balanced compared to singled ended. I have no noise issues and I am not running long interconnects (1 meter) so these are not issues and I could go either way.
Thanks for your responses so far. I did some additional checking and the Adcom GFP750 is supposed to have true differential balanced circuitry. Nelson Pass stated "the performance is best when it is run balanced." The DAC 3.0 is fully balanced so DAC to preamp should be fine without any balanced to unbalanced circuit changes. I think the DR25 may be the weak link. I cannot find any literature whether it uses fully balanced circuitry or not. I have read posts both ways. It is an older amp, but still quite good, and was originally $4000. I would think they would have not cut corners on an item in that cost range, but even the owners manual is not clear on whether the circuitry is fully balanced. I am also worried about a thinness in the sound some have talked about when running balanced compared to singled ended. I have no noise issues and I am not running long interconnects (1 meter) so these are not issues and I could go either way.