SET for 88 dB 4 ohm loadspeaker

Pauly; it may not be very apparent in your system due to room size, music type, etc. but, the issue is usually frequency response and bass control. You may hear some frequencies really loud but, low power doesn't really control a 10in woofer well enough to move a room full of air appropriately.

Hi Pawlowski

My speakers respond well down to the 30’s (I believe the specs are –3db at 34Hz ) and the amp does provide a very deep and controlled bass. I have measured response down to the low 20’s, although that must be down 10-20db at those low frequencies.

The most critical thing for a tube amp is a speaker with benign impedance curve. Given that, you’ll be surprised how little in power is needed to provide high(ish?) volume levels.

I think 88db is a bit low for a 300B based set, but I am sure an 6C33, 805 or 845 based set will do well. I have a 22wpc 6C33 SET and it will blast my walls down if I turn it too high.

Regards
Paul

Thanx Paul. I stand corrected.

Another consideration is a set of SET amps based on a 13E1 tube. I think it's a tetrode running in triode and still produces 30+ watts

>Won't work. You need push/pull tube. Either KT90 or 6550<

No, that is bad information. An SET amp such as the NAT Se2Se will drive that load without breaking a sweat. These amps are push pull SET, Class A, and output 70WPC into a 4 or 8 ohm load.

I have no affiliation with NAT.