So, from all that I said
above if I were in your position I would not go final DSET solution with bass
now but rather did it incrementally. Make your bass sections, connected them conventionally,
let say 16R each and drive them with some kind of SS amp. Then take the SET
that you would like to use as DSET and drive it into the bass channel. Play
with loading, find the best configuration and make a judgment about sufficiency
of power. Then go for a DSET that would be against a conventional load. 4x16R in
parallel = 4R. That would be a conventional load and you can use many different
amps to try, including your SET, If you test everything with your SET, find a proper
loading and get conformation about power then you can converts the found transformer
ratio to any another load.
That is basically what I did
over the time and this is what I would do if I do it again. Do not forget that
your situation might be very different from what mine was in my old city home.
Your bass channel will be running under 100Hz and your room dissipation at
100Hz might be very different then at 40hz, so you might need much more power than
you might think. It is nice to learn about it experimenting with SET then to
pay a lot of money for DSET OPT and then learns that you have not enough DC gap
to add another tube in parallel or that you need to lose another 10% turns on
secondary and the cost of shipping of the transformers will cost more than a
pair of new one. |
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