Amp recommendations

As usual folks negate to include the LxWxH of the room they're playing their system in but in this case it doesn't matter.

Man have you got the wrong amp for a 4Ω speaker, with a 88SPL that has a frequency response of 26Hz-20kHz. Once you get a demand for a note dipping under 60Hz you're pulling a freight train with a burro when you need a locomotive, (nice speaker by the way). Little wonder you fried your 30W amp. (nice pre-amp too).

You've got a tube pre-amp which will give you your classic tube sonic signature (before turfing that SPL 70 you may want to consider installing Mundorf Supreme Silver/Oil capcitors). Now you need a quality Amp with brains and brawn to man handle those speakers.

It's a wide variance but IMHO consider a used Bryston ST4B, a Krell KSA 200S, one of the Class A Thresholds, or if you're dead set on the headache of driver tubes, a new ANTIQUE SOUND LAB HURRICANE 200 DT, or a used RAY LUMLEY M-150 (if you can find one).


  I'm with Russ69 save the 300B if you can and use it for a second system.

1 z32kerber used the Cary amplifier driving the Chapman speakers for 23 years!!! I doubt that he "fried" the Cary amplifier.
2 Agree that the Bryston, Krell or Threshold amplifiers will provide a different sound presentation, better? Maybe or maybe not, but he loved the Cary-Chapman combination. This is a major positive point.
3 I like his idea of getting more sensitive and easier to drive speakers if he were to  make changes.
4 Of course the opportunity to hear different amplifiers is a good step if this is feasible to arrange.
5 On paper the recommended higher power /current solid state amplifiers will certainly drive the Chapmans but this doesn’t mean in actual listening sessions they would sound as good as the 300b push pull Cary. A direct comparison would be great to do. My money would be on the Cary for superior overall sound quality. 
Charles

@charles1dad 
what speakers would you recommend to pair with the Cary 300B? 

@z32kerber, 
What's your budget range for speakers? New and used or just interested in new?
What is the size of your room?
You recently mentioned Klipsch. Do you have actual listening experience with them?
Charles 

@charles1dad
My budget is around $4000.Preferably new but open to used.Room size 25' x 14'I mentioned Klipsch because others mentioned them as efficient speakers with good sound. But some reviews said they tend to lack at low frequencies (35Hz vs 28Hz on my Chapmans). I have not listened to Klipsch for many years and those were corner horns.My Cary 300B is currently in a shop right now. I found someone local that came highly recommended by another local business that deals only with valve gear. I have not heard back from him yet but expect to this week.