jkull Posted November 16, 2016 Share Posted November 16, 2016 Unnecessary as I presume this thread to be, I wanted to get feedback for my own confirmation and assurance. I am in the process of converting my 2 channel system to tubes and high efficiency speakers. Thus I decided on large klipsch speakers for many obvious reasons. I started with the idea of cornwalls, with some advising for la scalas. A nice pair of la scalas became available locally but I opted in the end to go for cornwalls for the 15" bass driver and lower frequency capabilities. This is because I happen to also listen to a LOT of heavy music as well.. Crustpunk, sludge, speed/thrash metal, power violence, hardcore, etc. Thus having a 15" cone I feel will suite me better and possibly alleviate my need for a sub any longer. I am planning to pick up these 60's earlier version vertical cornwalls (100bd) tomorrow... Anyhow. I threw a thread up on audiogon forum for input on my two selected possibly choices of tube amps. This may sound silly, but Ive got a dude or two questioning the pairing of these tube amps with cornwalls bc of the high sensitivity and impedance curves. Ive got others on there stating that the cornwalls should make a wonderful match with either the Line Magnetic 219ia or mc225 (the amps I'm considering). Meanwhile I heard in person a line magnetic 216ia through 104db la scalas just 2 weeks ago and it was great. No hiss hum or unwanted additional noise in the signal, which one individual on this thread claim may happen. And meanwhile I realize that the majority of people running these heritage klipsch speakers are doing so with tubes... Is this a completely ridiculous worry? I know tons of you run your cornwalls, khorns, lascalas, fortes, belles, etc, with all different SET and PP tube amps. This individual is concern act the impedance curve creates by the cornwalls may lead to an underwhelming sound quality. If this is an issue with cornwalls, or something others may have encountered, i would like to know. Would lascalas with a sub be my better route, or do I need not worry at all??? I do appreciate any input here... QUOTE: "One more point I would add relates to the impedance plot for the later version Cornwall II that is shown on page 12 (pdf page 14) of the paper I referenced in my previous post. It can be seen that the impedance varies from around 5 or 6 ohms in much of the bass and mid-bass regions, to more than 20 ohms throughout most of the upper mid-range/lower treble regions, and to as much as 75 ohms in parts of that region.Given the relatively high effective output impedance of nearly all tube amps, and the wide variation of effective output impedance among different tube amps, what that means (assuming the earlier Cornwall II has similar impedance characteristics) is that interactions between amplifier output impedance and the speaker’s impedance variations over the frequency range will very likely cause a given tube amp to sound significantly different with this particular speaker than with many other speakers, that have significantly different impedance variations. I have made that point in a number of other threads in the past, with respect to other proposed amp/speaker combinations, but I would expect it to be particularly true in this case. And the author of the paper makes similar points on pages 19-22 (pdf pages 21-24). So that is a particularly important reason why if at all possible it would be desirable to audition the candidate amp(s) with the specific speakers you will be using. The amp's intrinsic sonic character is only a part of the story." Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.