Need amp suggestions for Hedlund Horns....

I am not familiar with  your horns or the drivers involved but you do have a big room. Since there is a popular play in 300B tubes manufactured today with many choices I would check a 300B with a stiff power supply for bass control.

There is a Border Patrol EXD powered amp. on the gon right now and with the EML 300B I predict you would be very happy if you can afford that quality. BP can and will drive some other speakers.

Best of Luck

gwalt

I agree with Charesdad if you know the efficiency of your horns and if the crossover is complex? I think you have to get that decided before you go forward with your tube power. Beware that the design of an SET amplifier is as important as the tube selection. Not all are created equal.

Best of luck,

gwalt

I heard both 2a3 and a 45 on my Edgarhorn speakers and of the two preferred the 45. The caveat to all of this is the design quality of the amp....power transformers/coupling caps/power supplies etc. I also owned a top quality 300B but the 45 was at least an equal match in musicality with the 16 OHM/107 DB load.

You will notice little difference in power between 2a3/45 but I predict their are more 45 tubes out there to choose from the NOS tube days as they were used in tube radios of yesteryear. I owned the Yamamoto 45 and still own the Korneff 45 and prefer the Korneff for the sound you mention.......again same tube different design. Same ole story. My opinion is go with a used 45 if you can find one but quality of design matters a lot with either amp.

Charles:

Thank you. I believe there is guy at Wu Audio that is building a Korneff Replica. All I know is he is from Asia and copied the design. I think he goes by Wu?

I had some trouble with 300B tubes being microphonic with the long plates into a high efficiency designed speaker. The 45 tube has it all in musicality with great bass control for its output. If I were Ramoneo I would go that route as there is also some great NOS 45 tubes still out there. I still own 2 pair of RCA Globes and they are sweet as can be.

I can find out the builder if Mr. Ramoneo wants to know as I had a friend who had one built.

Jond:

That is it then. Thanks Jond. My memory sucks but I did have a friend who had both a Korneff 45 built by Jeff and a Min one and liked them both. He bought the Min one after selling the Korneff and wanted another Korneff and Jeff had stopped making them.

gwalt