Variable gain preamp ?


Can someone please let me know what the benefit of this is . I am looking at a 2 dodd audio pre's . one has the variable gain option . it is 1,000 more . is this worth it . why would i use it and how often would i be turning that dial ? my speakers are proac response 2.5 's . I am going to purchase one of these pre's then get a new amp . will the amp be part of the decision on what pre i would get ? Thanks,mike
128x128maplegrovemusic
It would depend on the amp and the efficiency of your speakers, as well as the ouput voltage of your source (most digital sources are 2V but some are not). The more sensitive your amp is the more gain it has. The more efficient your speakers are the more easily it is to drive them. Too much gain in your system and you may not have much range on the volume control. You see quite a few threads where people mention they can't get much past 9 o'clock on their volume control. Operating the volume control between 11and 2 o'clock seems to be the norm from what I've read. Some of that has to do with the specific type of volume control. There is a theory that some volume controls have more linearity towards the top end of their range. I will assume your source is 2V output and I see your speakers are not so efficient, so my guess is anything 1V and under for amp sensitivity and you would benefit from the variable volume control. In fact if price is not an issue I would get it anyway just for the flexibility.
A Klyne 7 for example has that feature. The advantages here are
- you can adjust the Input from a connected unit to your preferred level
- you can match the Preamp to the Amp you want to use
Overall - when done right - it is a super feature.