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I haven't posted here before, but I have acquired an SET amp (ASL AQ-1005DT) and need some advice with optimizing the way to connect it with the preamp and subwoofer. I am willing to DIY, even change the amp a little.
I've got two problems: 1) the subwoofer loads up the amp and changes its sound too much when connected (using either line-in or high-level in), and 2) the preamp gain is too high
Can I make or buy a box that takes the preamp input and splits it into two relatively isolated copies, one for the amp and the other for the sub line in? Then I could also attenuate the preamp output.
And could I make this a passive box by doing it all with transformers? The preamp output is transformer-coupled, so I like the idea of running balanced cables from the preamp to this box, which would then also be a balanced-to-single-ended converter and splitter. I've been looking at the SILK transformers, and it almost seems like this is feasible.
The input circuit of the amp could not be simpler: from the connector right to the gates of a 6SN7, with 100K to ground. As for the subwoofer, the inputs go to some kind of proprietary summing L+R network (it's a mono sub setup), details of which are not disclosed by the manufacturer. So I definitely want to isolate them.
May I ask this forum for any advice on this?
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