[racerxnet]

 James or others,

I have a Tri Vista 21 DAC feeding into a BP25 Pre and have a small concern. The volume knob on the Pre Amp is usually at the 9 O'clock position for normal listening levels. I feel this is to low and the signal from the DAC is to hot. From reading the specifications, the Tri Vista has a digital output at 2.17 volts and 50 ohms. Looking at the specifications for the BP25 the input desired is 500mv, or 1/2 volt.

Is the output from the Tri Vista too hot? I would like to get a wider movement range on the volume control if possible from the BP25. Are there any benefits to my thoughts, such as a lower noise floor. What is the recommended input voltage from a DAC to the BP25.

Thanks,

Mark

[James Tanner]

Hi,

I assume you mean the volume knob is at 9:00 o’clock, maybe?

In any event, 2.17 Volts is close to ‘normal’ for DACs, (usually spec’ed at 2.0 Volts).  2.17 Volts will not overload the preamp, but the volume will operate quite low on the dial. We can reduce the gain of the preamp if you wish or if you are using a Bryston amp you can adjust the gain on the rear panel.

james

[SoundGame]

His pics seem to indicate he is a Bryston 7B-ST owner times 4!  Don't believe the gain is adjustable on the ST series amp - at least it wasn't on my 3B-ST.

[redbook]

 No, there isn't a gain set on my 4bst either.