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Yes, Jessie, but in case you decide to go for DSET, would it be multi-channel Melquiades or anything else, then your consideration for type and topology of the lower bass would greatly dictate requirements for your DSET. If your lower bass channels run from 40Hz and down then the PS, size of the capacitors and the size of the output transformers for this lower frequency channels would be dominating in your amp. Also, you MUST take under consideration many other factors: efficiency of your LF section, reverberation times in your room at LF, the dimensions of your room (actual and virtual), power handling of your LF drivers, the topology of your LF section and many others.  For instance my LF Super Melquiades channel has somewhere slightly over 20W power and it is perfectly fine with my 6-drivers line array and relatively small room, in fact I have a lot of spare power. However, if my room would be 3 times larger or much less bass efficient then I do not think that the power I get from a single 6C33C would be enough for me.

Since you, looks, like will be dealing with very large room I do not know how it all will play to you. The 6C33C is a fairly not powerful tube and in the way in which it used in Melquiades (fixed bias) it gives better sound but less toleration to work with high AC grid voltages. It is phenomenal rube for bass that does down to 100Ohm on plate and makes the LF transformer very simple to make but it will be still 20W, and in many instances less power if you would like to drive it reliably.

If you find that you need more power then you might go in your LF channels for parallel 6C33C, getting out of it 35W-40W or go for more powerful tube, high voltage tubes for instance. It would be if you would like to stay in the SET world for your LF channel. It is possible that you might decide do not stick to SET for lower LF and go for PP tubes or PP SS amps. It is an open question if properly made SS, hybrids or PP tube amps might be a good complimentary lower LF amplifier to a system where DSET drives the rest of the systems. In fact I will be trying to address this question for myself in context of my system: the LF channel of Melquiades was better then any SS amp that I tried and was better then Zaratrusta Hybrid. However, the new implementation of Zaratrusta is coming (made at very different level, 150W of pure class A, with many other new elements of design) and I really wonder how it will be able to stand up to the sound of Super Melquiades’ LF channel.

In context of this thread: you need to decide much power you would need from your LF channels and then ingrate or do not ingrate this solution into your multi-channel DSET

Rgs,
Romy the caT

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