Deang Posted August 30, 2004 Share Posted August 30, 2004 ...where's my treble!? Quote Link to comment Share on other sites More sharing options...
NOSValves Posted August 30, 2004 Share Posted August 30, 2004 Hell you can't hear them anyway ! Where did you have the meter at ? You should place it about 3' in front of the speaker I believe to rule out any poor room acoustics. This could also be your amp, CD Player or wire ! Craig Quote Link to comment Share on other sites More sharing options...
BEC Posted August 30, 2004 Share Posted August 30, 2004 Dean, I don't know about your meter, but my Radio Shack Meter only claims to go to 10K. Bob Quote Link to comment Share on other sites More sharing options...
Deang Posted August 30, 2004 Author Share Posted August 30, 2004 LOL, well Craig, I was surprised I could clearly hear the 16Khz signal from the speakers -- so that's good news as far as my hearing goes. Bob, I've never heard that before. My meter is a couple of years old, and the manual doesn't say anything about that, does yours? Below are some well known calibration curves for the meter. My understanding is that the meter can be used and trusted for the most part as long as the corrections are made. http://www.audioasylum.com/audio/general/messages/49147.html Same deal here, but a little easier to read. http://www.hometheaterforum.com/htforum/printpost.php?postid=231211 Quote Link to comment Share on other sites More sharing options...
BEC Posted August 30, 2004 Share Posted August 30, 2004 Dean, See page 11. Bob 61689.pdf Quote Link to comment Share on other sites More sharing options...
sunnysal Posted August 30, 2004 Share Posted August 30, 2004 10 db down at 16khz? could be right depending on where you miked it and what meter you used...tony Quote Link to comment Share on other sites More sharing options...
Thoriated_Tiger Posted August 30, 2004 Share Posted August 30, 2004 Probably the same place my treble is at..awol from the (analog, in my case) ratshack spl meter. Even with corrections applied, by 12k there was nothing unless I held the meter's mike about a foot from the tweet horn. Yet I can hear signal clear up to 18khz. *peers at your graph* Huh. I guess there is a family resemblance there.. I have a bump at 50, and another at 100.. kinda like yours. Mine are fortes, in a decidedly non-optimal room. Quote Link to comment Share on other sites More sharing options...
bkrop Posted August 30, 2004 Share Posted August 30, 2004 Maybe you fried the tweeters with that "lady with acoustic guitar" music you are so fond of! Heh! Quote Link to comment Share on other sites More sharing options...
3dzapper Posted August 30, 2004 Share Posted August 30, 2004 "Officer I was looking for my treble when all of a sudden there it was, gone!" Rick Quote Link to comment Share on other sites More sharing options...
jt1stcav Posted August 30, 2004 Share Posted August 30, 2004 Any more treble and your ears will bleed...you should be thankful! Quote Link to comment Share on other sites More sharing options...
Deang Posted August 30, 2004 Author Share Posted August 30, 2004 You guys are too funny. Here I am dealing with a crisis of epic proportions, and all you can do is poke fun. It must be the meter, because it sounds great. Hey, about them goofy false corners of mine -- not near the loss I expected. Quote Link to comment Share on other sites More sharing options...
3dzapper Posted August 30, 2004 Share Posted August 30, 2004 Actually 30Hz to 10KHz +/-3 Db in a colored room is not bad at all. Rick Quote Link to comment Share on other sites More sharing options...
Dale W Posted August 30, 2004 Share Posted August 30, 2004 All the calibration tools in the world will never match the human ear . I use to be a " spec " junkie years ago untill i realized it did'nt mean jack **** cuz room sizes,acoustics and aux components are all in the chain . Just like the old dual carbs on my tunnel ram 454 LS-7 454 chevelle malibu , that girl always ran better when i adjusted the fuel air mixture and timing by ear and feel . If it sounds good then let her fly , sounds like crap then figure out why . Quote Link to comment Share on other sites More sharing options...
formica Posted August 31, 2004 Share Posted August 31, 2004 I was under a similar understanding as Bob where the RS meter inconsistently starts rolling off under 10k. You have to remember that the RatShack meters aren't calibrated mics... and only give a general approximation. Calibrated microphones are individually measured and sold with a calibration curve specific to the unit you are buying. The RS SPL correction factors commonly available serve as a general indication where these meters deviate... but don't take into account individual, batch, and update variations... which can be pretty significant. Later... Rob Quote Link to comment Share on other sites More sharing options...
edwinr Posted August 31, 2004 Share Posted August 31, 2004 I think you were lucky to get the results you got, Dean. My meter rolls off from 10k's but also from 100hz! And I bought it to setup friends subwoofers in home theatre installations. Quote Link to comment Share on other sites More sharing options...
TBrennan Posted August 31, 2004 Share Posted August 31, 2004 Dean---Seeing as you claim to improve Klipsch products you really should invest in a decent testing program and calibrated mic. Or at the least the mic and a good RTA. Knowing the results of your work is good engineering. Quote Link to comment Share on other sites More sharing options...
edwinr Posted August 31, 2004 Share Posted August 31, 2004 ---------------- On 8/31/2004 2:06:59 AM TBrennan wrote: Dean---Seeing as you claim to improve Klipsch products you really should invest in a decent testing program and calibrated mic. Or at the least the mic and a good RTA. Knowing the results of your work is good engineering. ---------------- Quote Link to comment Share on other sites More sharing options...
Deang Posted August 31, 2004 Author Share Posted August 31, 2004 Well, he's right I suppose. OTOH, I'm not really re-engineering any networks, and I think most understand that higher quality parts are going to result in a higher level of performance. I've got enough ears behind me now on that one that I sleep O.K. most of the time. The false corner mod I drummed up kicks ***. Sometimes good engineering is just good old fashioned common sense. 50 years and no one came up with that one. Chalk another one up for the guy who invented the vise. If anything I do doesn't bring an improvement, or doesn't work -- I have plenty who'll tell me about it, and I'll be the first to come forward and admit it when I'm convinced. I don't lie, and I don't stick my head in the sand. Quote Link to comment Share on other sites More sharing options...
maxg Posted August 31, 2004 Share Posted August 31, 2004 Dean, Never mind the highs - the meters are not considered reliable above 10K - but I would be more interested in taming that 63 Hz dip / 80 Hz peak - almost certainly a result of room acoustics I would say. Try re-testing those frequencies with the meter up as close to one of the speakers as possible - to eliminate room effects as much as possible and see if you get the same effect. Other than that the 4KHz low followed by the 6.3 KHz high is interesting - I wonder why you are getting that? Tailing off thereafter may well be more to do with the measuring equipment than anything else, but I seem to remember the KHorn is only good for 17.5 KHz anyway (@ -3 dB anechoic room). Quote Link to comment Share on other sites More sharing options...
TBrennan Posted August 31, 2004 Share Posted August 31, 2004 Dean---Are you revoicing the speakers? Just what are the improvements intended? How can you be sure that different, "better" parts are not going against the intention of a designer who intended certain parts to work together in a certain way, a synergy? That's why you should test if you're serious. It may be you're revoicing the speakers in which case you may be simply changing them but not improving them. Quote Link to comment Share on other sites More sharing options...
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