Straight Wire Music Ribbon

I have a pair too and I used an adapter to plug them into my Mag 1.7 QR. The bass is improved, overall speaking, it is acceptable.

Magnepan sells a spade adapter. Pretty nice and does a great job.

I have some from that period, I was a dealer then. The truth is in recent years I have used them as sub cables so I don't really have a good idea of how they sound full range. If you have access to any of the separate banana plugs that have a large head that can be tightened you can use them to adapt the spades so you could try them without modifying them.