Tape Out as Subwoofer Output?

Hey guys, I thought I would add something here.

I have a 1959 vintage Sherwood S-5000 el84 stereo based tube integrated amplifier.

It has tape out,called tape record.

Well, it is a variable out put and I'm running my M&K off it.
So, some older tube amps have variable out with the tape out..

I used to have a Rogue 99Magnum preamp and would occasionally run a sub off the tape loop. I have also run a sub on a different amp system using the high-level method described above. Both techniques worked fine.

If you're not constantly turning the volume up and down with wide swings use the tape out and set the volume on the sub to the normal levels you listen at , by using the high level speaker inputs you negate the crossover built into the sub....I get awesome results this way simply because I don't constantly vary the levels I listen at. If the sub volume ever becomes an issue I get up off my butt and adjust it rarely do I do this. Having a sub integrating with decent bookshelf's sound full and rich at medium and low volume. When a deep blast appears in a soundtrack or video it shows up .....