trioid

Hi jjptkd Thanks much for your response, and for not dinging me for mentioning a non-Klipsch sub. After I posted I had second thoughts in that regard. Anyway, maybe Klipsch will get into that range. In the meantime, my findings are like yours and so far about 50+ Hz low pass with a roll off of 18 db/oct is quite nice. CW3s can thump the bass pretty good, and I run them full range as you do your RF-7s, but there is plenty of tasty musical material that the sub adds. I do have a Paradigm crossover, but I really do not want to run the CWs through that, and I would rather not run just the sub through it either. Any other suggestions are most welcomed! Cheers! Jim

Many moons have passed by since I last posted.... FYI; recently purchased a SB16 from SVS and am working to match it up with a pair of Cornwall IIIs. Currently looking for the best low pass filter freq. and I am guessing somewhere between 40 and 50 Hz since the CW3s are not in a corner. Suggestions are welcomed! As usual, room position is the biggest problem, mostly for the sub, and I have very few options. I do like this sealed sub already - it sounds much better than other subs I have tried. Cheers, Jim

Hi - I have CW IIIs and for several years have run them with Bottlehead Paramount SET monoblock amps running 300Bs at ~8 W. This is in a pretty large room. Plenty of power. Cheers, Jim

Hi Chris: Interesting, and thank you for the inputs and handy links! Plenty to think over here, since with the Cornwall III, I can easily 'biamp' properly given a good Xover. The multiple outs allow the sub it's own range as well. Later, Jim

Wm - Thank you! That is exactly what I was wondering about. I think I need to reconsider all of this. In particular, looking for a really good active crossover. Anyone have a suggestion? Behringer has one, but one would have to modify (upgrade components) in that circuit as well, in my opinion. Cheers, Jim

Hi All Here is the situation, and then the question. Sorry for the details, but if someone out there is willing to help guide my thoughts, you will need to know the setup. This music system here is all ‘tube powered’ except for the CD player. The speakers are Cornwall IIIs and they are assisted by a pair of SVS subwoofers. I currently use a DEQ2496 only for ‘tuning’ the subwoofers -- the higher frequencies go direct from the preamp to the main amps. The preamp has a second output pair that goes to the DEQ. The DEQ output right now goes to a Paradigm X-30 active X-over that is used only as a low pass filter. That works just fine, as my room is somewhat flat from 100 to 20K Hz (I have measured it). Below that, the DEQ boosts from 0 to a max of +8 dB over the range of 100 to 20 Hz. Nonetheless being an audio nut case, I want to try out using the DEQ full range (after modifications*). The DEQ would go between the preamp and main amps. However, I don’t want to use the high pass on the Paradigm X-30 to go into the main amps – i just don’t like it. What I would like to try is running the pre amp to the DEQ then the output of the DEQ split to go direct to the main amp and through the active X over for the subs. The plan at this time is to more or less leave the equalizer settings I have below 100 Hz, and use the DEQ full range (let it auto equalize above 100 Hz only for room correction). With this setup, the Cornwalls are still getting the full range input. Soooo, here is the question for you experts (and I hope it is not too stupid!). Will I over drive the K33 woofers? They would now be seeing as much as an extra + 6 dB at 20 Hz, for example. Up to this point, I have not had any problems running full range to them, and the system sounds rather good, if I do say so myself. Just as a reference, I listen at or below ~ 90 dB at 10 ft away Anyone?? * Mods to the DEQ (no plan to run digital in or out) – new input op amps, direct out from the DAC to capacitors (avoiding all output op amps and related circuitry)

I have some experience here. We have Cornwall IIIs, and they are quiet (slightest hiss with your ear to the speakers) with no source input, and full gain on the preamp. As I recall, here is the system with tube details..... Preamp - Bottlehead Foreplay 3 with Telefunken 12AU7s Amp - Dennis Had 'Superamp' running 6DJ8 (BB)/EL84 (BB) driving 6CA7 (GE) in push-pull (class A) Plenty of power, and also very quiet. Oh, and I have a pair of SVS subs (25-31 PC-Plus) trying to keep up with the Cornwalls. Jim

I have not found it to make much difference unless you go to extremes (in wire gauge, that is). I still use multiple strands of magnet wire (copper wire with enamel insulation) after having earlier used the thick Monster rope, and other 'stuff'. Here is another recent discussion on the topic: http://www.audiodesignline.com/howto/showArticle.jhtml;jsessionid=E5B1CPNZNY3ROQSNDLPCKHSCJUNN2JVN?articleID=201805860 What a fun and also crazy hobby

- Contact Antique Electrronic Supply - Purchase 21 Ga magnet wire. ($5 for 100 ft). - Twist in pairs to get 18 Ga, strip the ends to bare Cu. - Hook up to speakers using any technique you like (bi-amp, bi-wire, bi-whatever) - Sit back and enjoy - Spend the money on music Another physicist has shared his opinion....[8-|]

Hi Pauln: I like your illustration! But I only got 154 uW. Does this mean I am both impolite and wrong? [] Cheers, trioid

I got my CWIIIs a bit over one year ago. The wall of sound is outstanding (6l6 pp amp driven by bottlehead foreplayIII). I believe you will be quite happy. Give 'em a little time, though. Mine just got tastier and tastier. Jim

nonetheless, IN MY CASE, it sounds better that is all.... jim

and, my experience is that it depends what the tubes are hooked up to. That is, it is the whole system that really makes it or not. Some speakers may be too laid-back for tubes, different tubes sound different, etc.

oops.... didn't think the first one went through!

Hmmm. My tube amp is a zero global feedback design. Other designs may not be so forgiving. following jackpod's comment: to be safe and take it out of our hands -- one should check with your amp manufacturer