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The best way to do it since you have an older MP-1

75.168.98.142

In Reply to: RE: How to devise a single-ended output from a balanced preamplfier posted by Lew on July 11, 2024 at 12:36:20

Start with a set of Y adapters.

Or add a pair of balanced outputs to the preamp. Newer MP-1s have had dual outputs for years and they get added if an older one is updated.

Then get yourself a pair of Jensen subwoofer transformers. Although not shown on their website, they make balanced in to RCA out.

The Jensen transformer is optimized for subwoofer operation and so goes down to about 1 Hz unlike regular audio matching transformers.

This is the best way to do it unless a balanced input is added to your subs. This is the way I do it at home.

Jensen subwoofer transformer (Open in New Window)

Follow Ups:

Thanks, Ralph - Lew 10:50:16 08/12/24 (3)
I contacted Jensen on this issue, prior to your posting, and the engineer who responded did not mention this particular subwoofer transformer as an option. I will get back to them. In the interim, I found out that the subwoofers I have in mind may in fact provide balanced inputs to the built in amplifier(s). That would greatly simplify the issue. I need to confirm this before purchase, but since I don't at the moment have $4000 burning a hole in my pocket (to pay for the pair of powered subwoofs), the project is on hold.
- The Jensen SUB-2XR is a lot cheaper - Ralph 08:18:03 08/13/24 (2)
  and works great. They make a mono version too; SUB-1XR.
  - RE: The Jensen SUB-2XR is a lot cheaper - Lew 05:46:10 08/16/24 (1)
    On their website I find "SUB2RR", not XR. Is that the transformer you meant to recommend?
    - Yes. nt - Ralph 09:12:00 08/20/24 (0)
      -

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