I suggest swapping back after a day or two. It’s next to impossible to get the volume levels the same, even if they are otherwise similar, and that will affect your judgment. Knowing Rega, it’s probably got some nice rich distortion products which can be pleasant. On the other hand, they may be inaudible.
Unless you own a basic $10 multimeter
Yes, I meant by ear of course!Unless you own a basic $10 multimeter
It isn't quite enough to say the amp has to have enough power to avoid clipping and decently low distortion to sound transparent, you have to add that the amp must be designed to have a flat frequency response (i.e. without artificially increased bass or treble) and the amp must be able to handle whatever impedance peaks your speakers thow at it.
This way lies madness. You can't go around with dozens of different audio systems so that you can play each type of music you like on a different system that happens to colour the sound in a way you like for that particular music type and the particular time of day and alcohol level e.t.c. you are at. Just get a transparent flat response amplifier that doesn't do any of that crap and then dial in whatever tonal colouring you fancy as a tone control/DSP/PEQ of some sort .
And low enough output impedance for the frequency response not to be altered by the variation in load impedance (see for example Erin's tests with speaker simulation loads relative to pure resistance). And being stable into the load impedance - certain amps in the past were known for oscillating when connected to the 'wrong' sort of speaker or cable. That sort of marginal stability problem may be where the ideas about cables making a difference came from.
You'll have to do a blind test and match the volume of your amps before jumping to any conclusions, trust me.
You are probably not going to hear a noise level difference between the two settings but to optimise things I suggest simply using the lower 19db gain setting and check if you then have sufficient gain available to reach the loudness you want. If it's not loud enough then use the higher 25db setting.
If you use XLR to RCA you would have to crank the volume up higher so if you feel like doing that, you should just use RCA and set the gain to 25 dB. Even at that high setting, the gain is still 3 to 4 dB lower than the gain of Denon's build in power amps so you have either manually match it with trim settings (assuming you are using the V3 Mono with some of the AVR amps), or re-run autosetup/Audyssey.
I don’t like to contradict you, but surely an XLR output is often at a higher voltage than RCA. Typically 4 volt max versus 2 volt max. If I’m understanding correctly then the amps would be receiving a higher level rather than a lower one, so might match better on the lower sensitivity.
Yes, thank you Peng. I ended up using RCA to RCA cables from my two Fosi V3 mono's to my Denon 6800H AVR. I chose RCA 25 db gain, the levels are more matched and I don't have to crank up the volume so high. By the way, these two little boxes deliver great sound and details for my left and right spaeakrs.
Good to know that it works well for you. "high" is a relative term, in this case relative to the Denon's build in amps. Denon AVR doesn't have balanced outputs (except the flagship model A1H0 so you can use RCA only anyway, and if you use RCA to XLR cable the results will still be the same, you won't get high voltage because the output on the Denon AVR is still unbalanced RCA.
Class D has nothing to do with that, although quality and good design of both the amplifier( whatever class it is) and the other devices might be more relevant . What component(s) are you thinking of connecting to the amp via a passive pre?
You heard wrong. There is no such problem with Class D amplifiers in general. It is specific to the implementation, just as it is with other amp classes.
