Loudspeaker designer/manufacturer John DeVore shows reviewer Ken Micallef his system.


And quite a system in it is!

At one point John tells Ken that he searched for the best amplifier of each "type" he could find, to use in the development of his various model loudspeakers. John explains in great detail how his speakers interact with different types of amplifiers.

Amongst the rare, unique, rather expensive, and/or otherwise unusual amps he chose, two more common and affordable models stick out: The Parasound A21, and for medium-power push/pull tube amps the Music Reference RM-10. John didn’t call it out by model number, but as he described it as a push/pull design using EL84 tubes it can only be the RM-10 (the only amp matching that description that Roger Modjeski ever marketed).

Modjeski marketed three push/pull amps: the first was the general purpose RM-9 (four EL34’s for 125w/ch)---a favorite of former Stereophile reviewer Dick Olsher, the second the RM-200 (a single pair of KT88’s for 125w/ch), designed to work unusually well with low impedance loudspeakers---Michael Fremer’s reference "affordable" tube amp for many years, and lastly the cute little RM-10 (a pair of EL84’s for 35w/ch). Modjeski said the sound of the RM-10 was his favorite of the three.

 

https://youtu.be/i9WYbi7afGQ?si=qkf8AiUCF_9_z2cl

 

bdp24

@bdp24 I wish more people used 5751s. Roger originally stocked them for Conrad Johnson preamps. The GE gray plates we have don't seem to be of much interest to folks for some reason. Maybe I need to put them on sale for a bit so more people realize what a nice tube it is. Sadly, people prefer the ribbed plates, but Roger's research determined the solid plates were superior in electrical and reliability testing.

@clio09 

 

thanks for the information about the tube stock.

I am in CANADA so I presume they would still be the

25% tariff slapped on by Canada.

Plus, financially, I’m not in a place to order the tubes at the moment.

But it’s good to know that You’ve got quite a few of them When that time comes.

I bought a whole bunch of different 5751 tubes And really nothing was as transparent as the ones from RAM.

out of curiosity, do you have A equivalent low noise 6FQ7 tube available!

@prof Unfortunately we do not have any 6FQ7s. 

When you are ready let us know. We don't ship worldwide any longer but we do ship to Canada. To help offset the tariffs we are thinking of providing an equivalent discount on goods for Canadian customers.