4V doesnt add any headroom!
Adjusting the gains properly at the amp will probably
turn the volts down below 2 volts anyway by the time
it reaches the actual amp circuirty (not circuitry in the amp
but circuitry in the amp that actually amplifies)

http://www.installer.com/tech/gains.html
http://www.installer.com/tech/preamp.html

Eddie

John Dziurlaj wrote:

"BigBob" wrote in message news:7u58c.139357$Up2.124018@pd7tw1no...
Can any one tell me if there is any problem using older ampliers that have
adjustment range of only 0.1 volt to 2 volts on the gains with a newer head
unit that has 4 volt preouts?

It won't be a BIG problem, but you won't be able to the enjoy the
extended headroom that 4v provides.

~John Dziurlaj