It would help to know what horn. What you need to know about any amp driving horns is how does it sound in the first 1/2 to 1 watt. I don't think there are many Bryston amps that will sound good in this range, but if it were me I would think about 25 watts or so with SS amps.
I'm not going to comment on the anti-tube bullshit on this thread. ;-)
I'm not going to comment on the anti-tube bullshit on this thread. ;-)