Tube amps for classical music FU29 vs EL34

Hello Bartokfan. I can concurr with M wilson's experience regarding bass response with both the el-34 and KT-88/6550 tubes. Grgm's solid advice on waiting until you get your speakers is a very astute piece of advise.Depending on your room size of course????....you will more than likely need a little more muscle,especially considering your speakers nominal impedence of 4 ohms. The jadis amplifiers are one of a handful of tube amplifiers that seem to respond well to a speaker with a low impedence due to there excellent output transformers and a 2 ohm tap.Most typical el-34 based tube amps will have a tougher time with 4 ohm load.The only el-34 equivalent tube that will give you the bass foundation and slam of a kt-88 is the original Genelec KT-77. The el-34 tube is a power pentode whereby the Kt-77 is a beam power tube like the kt-88 and can be succesfully substituted for an el-34 providing the screen-grid ratings of an el-34 are observed.Unfortunately... the Kt-77 is very scarce and typically very very expensive.Sonically.... the Kt-77 is a truly amazing tube when optimized in an el-34 circuit.It is even more liquid in the mids than a good nos mullard el-34 but possess's the bass drive and resolution of the Kt-88.The top end response of the Kt-77 is second to none and will easily trump any kt-88 or kt-90[genelec kt-88's included] Caveat....Using a kt-77 in a el-34 circuit will "not" give you any more power than an el-34. Best of luck on your endevour. Cheers David

Hi Bartokfan. I believe you can also run an el-34 in the Jadis da 30 as well as the kt-90, although you will certainly have to re-bias the output tubes to do this. Biasing any Jadis amplifier is a bit of an exercise as they are not the easiest amp to rebias.None the less, any Jadis amplifier is an incredibly musical instrument and most certainly a very expensive proposition to better.While I have never heard the Kalin in my own rig...I find it difficult to believe it would better the Jadis no matter what the tube choice may be. Best of luck.

Hello Again Bartokfan. Yes, the Da 60 would be the logical choice for your speakers and must be considered one of the finest sounding integrated's on the planet by anyones standards.It can also be optimized for the el-34,kt-77,kt-88 and kt-90. PS: there is a Da-60 presently for sale here on the Gon for a song,a no brainer at $2600!