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aceinc

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  1. I was looking for pictures of the inside of the CW III. Thanks for posting this video. Is the foam shown inside the cabinets in the video original, or added? I noticed the chips in the cabinet around the horns. Is this likely to happen when I remove the horns? Is there anything I could do to avoid it? It appears you brace the front & back panel only. Is there any concern about the top & sides? Do you have any other photos or videos of the CW III tweak/upgrade process?
  2. This brings up the cart & horse conundrum. If they don't perform better than what I have I will sell them. If it takes tweaking to make them sound better then...
  3. While I did not propose before & after analysis, I assumed this is common practice to the point of not mentioning it. I I am not as diligent about recording my results (my scientific method is suspect) I do use REW with a calibrated microphone and do before & after graphs. If you look at the other post, you'll see an REW graph of the speakers in their current environment. I fully admit my knowledge & expertise in electronics is limited, however I do try to crowd source to compensate. Triamping with DSP is not a potential solution for my situation. Although if I put this into the main system, the sound processor has Audyssey which will do room correction at the macro level.
  4. Sure, now you've got me thinking about who is changing the logs, and without a fireplace screen is the entire building going to burn down. Good job😰
  5. As mentioned in another thread "What to do with Some nice Cornwall IIIs?" I have acquired a very nice looking pair of Cornwall IIIs. I am an audio hobbyist, not an audiophile. I like to tinker. I think I can make things better, which I sometimes can. Which brings me to the potentially controversial point of this thread. Should I tweak the Cornwall IIIs? I have yet to pop the woofer out of one yet, but in looking in the port, feeling the cabinets while they are playing and knuckle raps, there may not be much bracing and "sound damping" material in the cabinet. Additionally in tapping the midrange horn it has a plastic "ring" to it, which sounds like it is in the bandpass of the speaker. Has anyone pulled the woofer out and poked around a CW III? My thoughts on tweaks are all physical (not electronic); Add 1" x 2" hardwood bracing. Put either egg crate foam or rock wool on the walls leaving room for the port to breath. Apply 1/4" mass loaded vinyl rubber to the outsides of the body of the horn(s) If the woofer frame is stamped steel, apply mass loaded vinyl rubber to the to the woofer frame. The main purpose of the tweaks is to reduce any coloration of the sound reproduced by the "deadening" the cabinet and anything which might resonate. I would expect these changes would improve the SQ somewhat, but not dramatically change the characteristics of the speaker. One of the dilemmas is; If i execute all of these tweaks with utmost precision, nothing will be visible externally, however the speakers will no longer be "original." Since these speakers are large, and I am not sold on whether they can replace my existing main speakers I may be selling them soon. People who know Vintage Klipsch may be put off by the tweaks, decreasing their value. On the other hand If the tweaks make a positive difference it may make me want to keep them. What are your thoughts?
  6. While I have a bunch of power amps, Stereo, Mono blocks, SS, Tube Old & new, the only other stereo preamp I have is an old Dynaco PAS 3. I have been keeping my eye out for a stereo preamp haven't found one yet. I may go straight from a source like my computer or an NEC CD player with gain control to a power amp like the Adcom. But I will probably do initial testing with my Marantz AV7704 and Emotiva XPA-1s because they're hooked up to my Maggies. The straight to my Adcom approach is typically how I test stuff. It keeps things simple and I don't have to mess with stuff in the equipment cabinet and changing settings to bypass Audyessy..
  7. Wish that I could. At the moment this room is the only place in the house I have available. I could put them in the garage, but that would be a lot of work in cleaning things up and not do them justice. If I can get my long suffering wife to help me hoist them, I may test them on top of the subs that are in the picture with the Maggies. This way I can see how getting the slot ports up off the floor affects the sound. I would test them without the subs initially. If they sound promising I could try and integrate the subs which use the high power signal from the front speaker amps into the plate amps on the subs. The signal is then Y'ed into an 80hz high pass filter feeding the Maggies.
  8. I believe I have isolated the hum to the preamp. I lugged my Adcom GFA 555 II into the room. with the Adcom on and hooked up to the speakers only everything is silent. As soon as I attach the preamp and plug it in, I get a hum, the hum changes when I turn on the preamp. The hum is much louder with the Adcom than the tube amps. If I disconnect the preamp and run the computer directly through the Adcom, no hum. I also tested a tube amp by turning off the amp, pulling the RCA from the preamp, and shorting the RCA and turning the amp back on and there is no hum.
  9. Here is a graph of the current environment. The left & right (Green & Purple) are 1 foot away centered on the squawker. The "Both Listening Position" is Red and taken where my head would be while listening. Smoothing is 1/6 octave.
  10. The one thing I need which is difficult to come by is a room stretcher. I got out my testing gear this morning, because in my listening last night everything seemed screechy and quite unpleasant. I ran a couple of scans and there was a 7-10 db sine wave looking artifact in the graph above 1 khz but only when I played both channels. When I played a single channel there were random peaks & valleys which were similar on each speaker, but no discernible pattern. I moved the chair back (listening position) ~2 feet and the artifact went away. The back of my chair is now against the fireplace on the opposite side of the room from the speakers. For fun when testing one amp/speaker I switched from pentode to triode and everything went down a few DB, with the top end down a bit more. I'll post some graphs a little later. I also want to try some SS amps I have to see if I can see/hear a difference.
  11. Thanks, you're almost a neighbor. I'm down in West Broward.
  12. They were a kit, and the the guy who does the kits is still around and has been very helpful, especially since I didn't buy them directly from him. I am not an EE but the components all look good and they are put together reasonably well. I think I'll wrestle the hum to the mat.
  13. I will eventually try the CW IIIs in the main room. I wonder if they will sit on top of the OB woofers?
  14. I have a lot invested in the MMGs, not money wise but energy, thought, design and emotion. I designed and built the bases for the MMGs. Using drivers & amplifier from GR Research I tweaked their OB woofer design and built the cabinets underneath. In the back of the room not hooked up I have an OB speaker I designed & built that when coupled with the woofer cabinets under the MMGs sound almost as good as the MMGs, and better than the pair of B&W 802 Matrix they replaced. 500 watt (at 8-ohm) Emotiva XPA-1 monoblocks might be a tad of overkill for a speaker rated at 102 DB at 1 watt. In the room with the CW IIIs I am sitting about 7' from the front of the cabinet. They certainly dominate things. makes me feel like the man in Maxell ads.
  15. I had the opportunity to purchase a pair of Cornwall IIIs. The story; Late on a recent Saturday night I popped up Craigslist and saw an ad for a pair of CW IIIs right on the first page with no filters. They were in my neighborhood and they were asking $300. I have a lot of audio gear and really wasn't looking for new speakers The pictures made the speakers look pristine, and the ad said they were selling them as part of an estate. I sent the person a text saying, you are selling the speakers for way too little. They are worth more. I continued looking through CL and saw a kit built tube preamp for $50 from the same seller. By then the seller had replied and said thanks they were their father's and they just wanted to get rid of them. I told them again it was too little and they responded they weren't sure if they worked. I said "I tell you what, I'll come over get everything hooked up and running and you should be able to get a lot more for everything." The next morning, Sunday I head over and the woman selling the equipment she said her phone blew up with everyone sending offers. I said I will be happy to set everything up told her she could get a lot more than what she had it posted for. After talking for a few minutes she said she would be happy to sell it to me for the price quoted knowing that her father would like someone who appreciated audio gear to have it rather than someone who would just buy to sell it. Long story short(?) I am the proud owner of a fairly pristine pair of CW IIIs (B stock) and two 125 watt kit mono blocks (tube4hifi M125) and a kit tube preamp (tubes4hifi SP9). After futzing around I have everything hooked up in a guest room which is too small, 11'x13.5' and other than a 4-5 db hum per speaker things sound pretty good. I do not self identify as an audiophile. I consider myself an audio hobbyist. I have been intrigued by high efficiency speakers, but never owned any, but now I do. My fronts in my main system which I use for both HT and music are the antithesis of the CW IIIs. I have a pair of Magnepan MMGs in custom designed and built bases sitting on OB sub woofers driven by a pair of 1KW SS mono blocks. What should I do with the CW IIIs and tubes? Some of my ideas include; One of the bases (risers) seems to have experienced some damage, but is still serviceable. Klipsch wants $150 for a new riser, I could build one myself but maybe not match the stain perfectly. or build two and paint them black like the CW IVs.I have also read that the bass is a bit boomy in these speakers (I experienced this as well in my limited listening) It is recommended by those folks to raise the cabinets. What is the minimum height the CW IIIs need to be raised to achieve a positive result? What I read said to get the squawker at ear height, which is both ambiguous and kind of high I think. Which brings up tweaking mania. what are the best bang for the buck (and effort) tweaks for CW IIIs? In the end, I do not know what I will do as I am not sure they can/will out perform my current system, and another large pair of speakers in my main listening area seems untenable. Here are some pictures of the system I bought and the front wall of my existing setup.
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