Help with some vintage amplifier and speakers I found in an Op Shop - AVS Forum
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post #1 of 4 Old 05-15-2014, 10:01 PM - Thread Starter
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Hi all,

I found this Vector Research VR-2500 amplifier in an Op Shop (Aussie speak for Opportunity or Thrift Shop) and a pair of Wharfedale 508 speakers.

I'd like to have this setup in the garage as a dedicated music system (with a Raspberry Pi running Squeezelite to stream music from my NAS).

I had a look online and found this info on the amplifier.
Quote:
Analog AM/FM stereo receiver. Inputs: AM/FM, phono, tape, aux. Connections and
switching for 2 pairs of speakers, headphone jack, loudness compensation,
stereo/mono. Nice clean design. Power output to be approx. 22 watts per
channel. This unit has nice cosmeticsand is fully functional. Block diagram is
on top of cabinet. This receiver was offered from 1978-82 for $265. (21 lbs
net, 28 lbs gross)

The speakers are rated for 15-100W and 8 Ohm. The amplifier is rated for 22W per channel and either 4 or 8 Ohm.

I'm not sure how to connect the speakers to the amplifier. The speakers are rated for 8 Ohm. The back of the amplifier says to connect in A+B mode for 8 Ohm rating. Do I take a single speaker wire and connect it to both A and B? Or do I simply connect the speakers to the "A" inputs and use the A+B knob in the front to control whether its 8 Ohm or 4 Ohm?

Thought I'd ask for help before I connect something wrong and fry a component.

Thanks in advance.



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post #2 of 4 Old 05-15-2014, 11:53 PM
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Connect to only speaker A and select only speaker A. A+B is less power. Don't use it. And don't wire one set of speakers to both A and B.
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post #3 of 4 Old 05-16-2014, 04:57 AM - Thread Starter
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Perfect! Thanks a lot. Appreciate your help.

Cheers
Srini
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post #4 of 4 Old 05-16-2014, 02:14 PM
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Your welcome. Nice pictures. That helped a lot. Cheers back at you.
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