Marantz Model 140 VU Meter Adjustment

[blubino]

Hi to all,

I picked up a nice Marantz 140 amp that works and sounds great but, the VU meters appear to be out of adjustment as they don't even begin to move unless I turn the volume up to a level that will start breaking windows etc. Can anyone tell me how to adjust the VU meters to where they are relatively accurate? I have a service manual, but I'm not that knowledgable. Thanks much for the help and advise.

J.B.

 

[BmWr75]

What is the efficiency of the speakers you are driving? Meters won't move much driving high efficiency speakers to loud volumes. I was driving some BMS compression drivers in a biamp set up with a 140. You could barely see the VU needles move.

 

[blubino]

Thanks for the reply. That is probably the case. My 2 speaker systems I use are;
Klipsch KLF 10
Celestion model 8
I guess I was expecting more meter movement, but my speakers don't need much power to drive at listening levels so I guess I learned something about the 140 amp. Thanks again.

 

[BmWr75]

Don't know about the Celestions, but the KLF-10s are 98 dB efficient. Which means they require very little power to play very loud.