Tube subwoofers?

I've just been listening to the Seventh Veil loudspeaker system with Tom Evans' Soul (tube) Power amplifiers.

Initially the Soul amps were just used for the full-range speakers and an inexpensive solid-state power amps were used for the bass.

Changing to Soul amps for the subs as well as the mains made a dramatic difference top the bass, integration, tone and timing.

Of course the Soul amps have a far better bass end than many tube amplifiers and the solid-state amps used were relatively cheap and could, no doubt be easily surpassed.

Still, this listening session changed my ideas about amplifying subs (particularly with the Seventh Veil speakers). Ideally I would now go fo tube amps throughout, with the sub amps matching the main amps if possible.

Steve

Steve - You wouldn't be selling Seventh Veil speakers by any chance? Or ultimate power sources? Or kleenex boxes?

You could make a SET with an 833A to power a subwoofer with enough power. Use the high voltage transformer output from the power supply of a discarded microwave oven and a full bridge rectifier consisting of four murcury vapour rectifiers. The output transformer might make steel cabinets and desks slide across the floor and you will want to have a well ventilated cabinet that will keep the 2500 volts you will be giving it where it will not be accidently touched. Some people at GR Research built one, but I think they did it to be funny. However it worked.

Personally, I almost became so disappointed with subwoofer amplifiers going bad in a year or less that I almost built such an 833A monstrosity. Fourunately, Audio Express came up with a sensible subwoofer kit that perfectly integrates with my 45 SET amplifiers.