Dennis Had Inspire Amps

[Analog Addict]

Originally Posted by oldominion

GPA hasn't responded to two emails I've sent. I've heard that customer service isn't a strong suit...

And yes, I've been recommended a subwoofer by many 604 users. I've never been a fan of subs, have never really heard a system with a sub that sounded that good to me. You are correct, however, that that should be a move to consider...but I'd probably just sell the 604's before going down that road. I have limited room and the 604's already take up enough space!

Back when I bought the amps I had a back and forth with Dennis. He's not a huge fan of the 604's, even though he once designed a xover for them, nor subs.

As an Altec collector, I've had multiple interactions with GPA. You're wasting your time with e-mail. The only way to really get in touch with them is to call them. If you're lucky, Bill H himself will answer

Originally Posted by straitwire

I imagine Dennis is chuckling right now.
Dennis has designed and manufactured tens of thousands of amplifiers with voltages ranging from 2000 to 7000 volts and producing 500 watts to 8000 watts of output power. 900 volts is child's play. What a hoot...

As backstory, don't forget that Dennis is an old HAM and founded the HAM radio companies Dentron and Ameritron. He still builds and tinkers with an old friend and as Straitwire mentioned, kilovoltages are old hat for him. But, I asked him the 845/811 question quite awhile ago and at least at that time, he did not have output transformers available that met his standard for the power handling requirements created by those tubes