What is the idea input voltage - 2v or 6v into a McIntosh C1100 tube pre-amp?

[992Sam (Sam)]

So just as the title says… I’m trying to see what the idea setup will be once I get my C1100 next week. Right now while I’m waiting I’m running 6v directly into the MC462 Amp balance connections… using the digital volume on the Rossini, I’m not able to get much louder than -15db before it gets too loud… so I assume with the pre-amp, I’ll want the volume set to 0.0db so as not to lose any resolution, in which case will 6v be crazy loud on the C1100 preamp? too much voltage?

I read somewhere that the normal line in voltage is 2v for most pre-amps, and that some struggle with higher voltages, but I’m curious if anyone here is using a McIntosh tube pre-amp and can tell me what they’re doing?

[PAR (Pete Rogers)]

Sam I told you how to set the best line voltage in answer to your first posting here: Nothing has changed since:

New Bartok on it's way, couple of questions

Welcome Sam. The Bartok actually provides four output level ( line level) settings: 0.2V. 0.6V, 2V and 6V. These are fixed, not constantly variable. Which you choose depends on a host of things; the average level that your recordings have been mastered at, the input sensitivity of your preamp ( if you use one), the “law” of the volume potentiometer on the preamp , the input sensitivity of the power amp(s) especially if you do not use a pre-amp, speaker sensitivity and how loud or soft you like…

Remember I said that your recordings, your amps, your speakers , your listening preferences all have a bearing on your choice. Other McIntosh users may not have similar recordings, equipment, rooms or even preferences.

You are going to have to find the courage to rely upon your own decision.

[992Sam (Sam)]

Well, thanks for the answer, but I’d rather hear what owners of MC tube pre-amps are doing is all… it’s a significant difference and at $14K for a pre-amp, I don’t want to do anything that might harm it.

[PAR (Pete Rogers)]

@992Sam

I don’t want to do anything that might harm it.

You are unlikely to do any harm . In fact you won’t do any harm as here are the maximum input figures for the line level inputs on a C1100 from the User Manual:

Maximum Input Signal High Level, 20V Balanced, 10V Unbalanced

So both exceed the maximum output of your Rossini @ 0.0dBfs.

Therefore it is back to what produces the best listening experience and the most usable volume control settings for you in your particular circumstances.