300B vs. KT88 SET?


Hi guys, I've heard so much ABOUT tubes that I want to try them. My speakers are very efficient, so there should be no problems with 7 watt SET amps. Unfortunateely, I can't find place to audition them so I need your help. There are number of amps available here on the Agon. Some of them based on 300B tubes and some are using KT88. Thouse that use KT88 are less expencive to buy, and so are the tubes.
But how different do they sound?
All you inputs and opinions are appreciated.
zoya
Guys, thank you all for your great inputs. As you can see from my system - I don't expect any problems from the speaker's end, they are 98dB. My biggest concern is musicality, transparancy and blackness of the sound (absence of added noises). Am I asking for too much?
:)
I agree with Jax2 and others, that the inherent qualities of either 300B tubes and Kt88s are evident, according to the type of music that is demanded of them. I tend to associate Kt-88 tubes with powerful and high wattage wise tube amps. Due to the higher wattage of most Kt-88 tubes gear makes me think that they were intended for high energy music such as rock, or heavy orchestral. Although there are several manufacturers that have multiple 300Bs in order to produce more useful wattage, for medium sensitivity speakers, the most refined 300B amps seem to be those producing 9 watts per channel max. Being an owner of both high powered tubed gear and low, SET 300B amplifier, I notice a large different in sound, as it was well explained by one of the posters above.

Yes, you need to have two different amps or maybe two different systems in order to enjoy the best musical "fit" that one can, but honestly, most people do not have the space.

I personally, kept my 300B amp and I am presently running a low battery powered SS amplifier, which sonics are at least 95% comparable to my 300B amp, especially in the midrange.

BTW, my goal is to have a system like JAX2 has. Beautiful and simple set up.
Hey Bemopti123 - thanks for the compliment. I actually moved that system to my workspace where I listen to it now. Mostly for WAF per my system description. A more modest, KT88 based sytem is currently in my home where that one was. The LaScalas now have much more space to breath! Hey, how do you like your Voight-Pipes? I've been thinking of trying a pair of those at some point. Terry Cain lives only a few hours from me and I keep threatening to go out and visit him in the stick and listen to his speakers. I have a feeling they may hook me! Good input on the differences too (thread subject). Zoya - 98db is just fine for SET in most rooms, though I've never heard your speakers so cannot comment beyond that general observation. 300B tubes are direct heated and are therefore prone to some low level noise when at idle. With my LaScala's (104 db) you can hear it, though I never found it annoying. Less so with speakers af less efficency. KT88's are not direct heated tubes, at least I'm pretty sure they're not (someone correct me here if I'm wrong), so that idle noise does not exist there (if it does it is not likely the KT88 tubes). As far as the 300B's once they are playing music, I find the background to be quite black. This is with my system in my room, to my ears. The idle noise has never been an issue when music is playing, even at low level....at least for me it has not.

Marco
Noise, be it from tube heating via high sensitivity speaker or in my case, due to what is called "battery" noise, it unavoidable, unless you have one of those new fangled digital amps. I have a pair of Voigt pipes, just the cabinets left. I made them about 3 years ago, and for whatever is worth, they sounded pretty good to me, until I got a pair of Zhorns, at which point, I decided to cannibalize the Fostex drivers from them, and now, I am rocking. If you were close to me, I would have lend them to you permanently! Well, that is not the case, for it seems that you live in the West coast. Jax2, what also fascinates me is the Voigt pipe, as it is described in TWL's system. It seems to me that he was able to overcome some of the most common complaints of their design, chiefly the lack of low frequencies. He is a mad tweeker and experimenter, so things might be different for most of us. Anyway, you can build yourself a pair of Voigts for about $450, drivers included. Affordable. That is the story. I would love to hear your job rig.

PAUL K
If you find yourself in Seattle Paul, just send me an email and you can come by and hear either rig. Always happy to stand around and kick tires, er, wires, and share music. Tom also suggested I try voight pipes. You can find my email link on my website. Thank you for the offer which I'd happily take you up on were I closer. I'm actually from NYC and got eight years off for good behavior in Vermont, where my folks still live. I don't think I'll ever move from Seattle though. Been loving it out here for over ten years now.

Marco