I miss VU meters and all their everyday pointlessness... But wots all this then.. Nice
SG AVU ANALOG VU METER WITH ENCLOSURE 245x175x90 mm | eBay
The basic difference is this: a preamp boosts a weaker signal to line level, while an amplifier boosts a line level signal so that it can be sent to speakers. Suits outputs as Minidisc / Tape 1/ Tape 2 / Recording / Monitoring.
www.ebay.co.uk