10-08-2011, 02:29 PM
I don't know much about amps and speakers for "pro audio" (read: musical instruments) but my understanding is that things such as guitars need a "Hi-Z" input, which is somewhere in level lower than line-level, which your amp MIGHT have.
But if the amp was ONLY used for a record player it only has a phono input, with RIAA compensation EQ, which will amplify the instrument plenty (and maybe too much ...) but make the instrument sound weird too. RIAA EQ boots bass and cuts treble because records are cut just the opposite, reduced bass and higher treble.
Why only use one speaker? They're both already hooked up, leave them on that board as-is. Those filter caps, likely electrolytic, are well past their sell-by date and probably way out of spec by now.
I'm with Whiip here, if it works at all it might look like that scene in Back to the Future.
On the other hand you've got nothing to lose as the equipment isn't worth anything. Wear a helmet. Maybe some gloves. Shoes with good soles. And random kevlar.
But if the amp was ONLY used for a record player it only has a phono input, with RIAA compensation EQ, which will amplify the instrument plenty (and maybe too much ...) but make the instrument sound weird too. RIAA EQ boots bass and cuts treble because records are cut just the opposite, reduced bass and higher treble.
Why only use one speaker? They're both already hooked up, leave them on that board as-is. Those filter caps, likely electrolytic, are well past their sell-by date and probably way out of spec by now.
I'm with Whiip here, if it works at all it might look like that scene in Back to the Future.
On the other hand you've got nothing to lose as the equipment isn't worth anything. Wear a helmet. Maybe some gloves. Shoes with good soles. And random kevlar.