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.
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.