I listened for years to a CJ Premier 14 & never experienced any problems. No noisy tubes or ringing. The tubes lasted until I got the itch to try something new. Nor do I have any complaints about CJ factory communications.
Likewise, I had good service out of a CJ PV10AL preamp and MF2250A amplifier.
Likewise, I had good service out of a CJ PV10AL preamp and MF2250A amplifier.