boa12 Posted January 8, 2002 Share Posted January 8, 2002 how come we don't see anything on the sensitivity or efficiency of subs as we do w/ other speakers? tv or klipsch, what's the output of the ultras or rsw-15 at 1W/1M. i think i just answered my own question, but still shouldn't there be some output to compare dif subs? ------------------ My Home Systems Page Quote Link to comment Share on other sites More sharing options...
h2xmark Posted January 8, 2002 Share Posted January 8, 2002 well,my opinion is that it would vary,what freq. would you use for the test tone? pink noise,yes or no? to many variable's,i may be wrong let's hear it ? just my 2cents,Mark Quote Link to comment Share on other sites More sharing options...
Colin Posted January 9, 2002 Share Posted January 9, 2002 good point, according to Tom Nousine, many of the measurements and standards for subs can be differeent than the mains ... ------------------ Colin's Music System Cornwall 1s & Klipsch subs; lights out & tubes glowing! Quote Link to comment Share on other sites More sharing options...
boa12 Posted January 9, 2002 Author Share Posted January 9, 2002 i guess a new standard would have to be invented. like output at 50W/1M w/ a 30hz pink noise test tone. i guess my main ? was is this info relavent to comparing subs like even some idicator of "speed" maybe? or do we just need this sub will do ___db at ___hz max output w/ a 10% thd limit? not that that's not a good way to compare subs. ------------------ My Home Systems Page Quote Link to comment Share on other sites More sharing options...
TBrennan Posted January 9, 2002 Share Posted January 9, 2002 Since most subs are self-powered efficiency doesn't matter, only how much output at how much distortion the sub can make matters. Non-powered pro-sound subs by EV and JBL do have efficiency ratings, I would imagine the Klipsch Pro subs do too. Quote Link to comment Share on other sites More sharing options...
TheEAR Posted January 9, 2002 Share Posted January 9, 2002 TBrennan, You got that right Only SVS and HSU and a few horn subs with the giant Pro subs would fare well in the 1W/1m at one meter test at 50Hz and below. All I care about is houw much clean sub bass around 20Hz can a sub generate in my room.If its over 110 is good,if its closer to 120 it woukd be perfect.I did not find any non pro sub that can generate over or even close to 120dB at 20Hz. My goal will be surpassed this year. I will attain over 120 dB at 16Hz(a couple of SVS SS will help me no doubt ) TheEAR(s) Now theears Quote Link to comment Share on other sites More sharing options...
matthew2 Posted January 9, 2002 Share Posted January 9, 2002 Not that ist's high end or anything, but I once saw a JVC mini stereo sub rated at 77 db. ------------------ Matthew Gatta' love klipsch Quote Link to comment Share on other sites More sharing options...
TBrennan Posted January 9, 2002 Share Posted January 9, 2002 Ear---Your search for the perfect sub is interesting but you aren't really gonna be happy until you build 20' long concrete basshorns with 15'x15' mouths. :-) Have you seen Roggero's concrete basshorns in France, each driven by 6 Altec 515 15" woofers? 17hz at over 130db. Mids and tweeter are Onken drivers and horns, VERY fine and far-out Japanese horn gear. Gorgeous. Quote Link to comment Share on other sites More sharing options...
boa12 Posted January 9, 2002 Author Share Posted January 9, 2002 yea ears, or u could drain 1 of your indoor seement ponds & turn it into a sub tbren, u remember what kinda sensitivity specs were on those jbl & ev passive subs? just wonder approx as i've never seen them for subs (because i look mostly at the powered ones). ------------------ My Home Systems Page This message has been edited by boa12 on 01-09-2002 at 11:16 PM Quote Link to comment Share on other sites More sharing options...
TheEAR Posted January 10, 2002 Share Posted January 10, 2002 TBrennan and Boa, One problem with your basement sub ideas.I dont live in my house and have peeps living below me! LOL The building is solid concrete and has extra thick walls and floors.Its built like a bunker,this is why I can blast my systems and nobody ever complains. If they can stand having to live in a bass horn and endure over 110dB of liver damaging bass it would be fine. I have to settle for lowly 120dB at 16Hz,the 130dB mark is not for me. Besides over 115dB is not good for any ears and health. TheEAR(s) Now theears Quote Link to comment Share on other sites More sharing options...
TBrennan Posted January 10, 2002 Share Posted January 10, 2002 Ear--Here's a picture of Roggero's rig, follow the link to Tom Dunker's site for more pictures and a description. http://www.machmat.com/top10/2.htm Quote Link to comment Share on other sites More sharing options...
TheEAR Posted January 10, 2002 Share Posted January 10, 2002 Sick stuff,sick sick sick.This is what I would call CUSTOM as custom can be. The link secion is great.I did also look at TAD drivers,the prices on these incredible drivers are not for the supermarket crowd.Over $2000 US for tweeters! And you need to buy horns if you want to take full advantage! Another 2 grand! This starts to interest me more and more.Hmm I think a good large TAD monitors would be great for me.But the price! TheEAR(s) Now theears Quote Link to comment Share on other sites More sharing options...
TBrennan Posted January 11, 2002 Share Posted January 11, 2002 Ear---I know a couple of sources for used and reconditioned TAD compression drivers at good prices, e-mail me when you're interested. The TADs are simply reverse-engineered JBLs with berylium diaphragms; Bart Locanthi, an ex JBL guy, was hired by Pioneer to design them. He also designed those very JBLish Pioneer APM home speakers with the film tweeter, those were pretty good speakers. The high cost of TADs is due to the Alnico magnets (money wasted IMO, ferrite magnets are as good as Alnico IME) and the high costs of working with berylium. Of course good compression drivers are expensive anyway but not THAT expensive. Quote Link to comment Share on other sites More sharing options...
TheEAR Posted January 11, 2002 Share Posted January 11, 2002 TBrennan, Right on the money here... "The TADs are simply reverse-engineered JBLs with berylium diaphragms; Bart Locanthi, an ex JBL guy, was hired by Pioneer to design them. He also designed those very JBLish Pioneer APM home speakers with the film tweeter, those were pretty good speakers. The high cost of TADs is due to the Alnico magnets" JBL and Altec are being copied and copied.Still the awesome TAD compression tweeters and mid-bass woofers are among the very finest. Thanks for the tip about used and reconditioned TAD drivers.I will keep this in mind. TheEAR(s) Now theears Quote Link to comment Share on other sites More sharing options...
boa12 Posted January 14, 2002 Author Share Posted January 14, 2002 if anyone's seen any sensitivity specs on any passive subs, what are some? just curious in general. can't find any on the net. ------------------ My Home Systems Page Quote Link to comment Share on other sites More sharing options...
TBrennan Posted January 14, 2002 Share Posted January 14, 2002 boa-- www.jblpro.com/pages/cinema/lfsub.htm This message has been edited by TBrennan on 01-14-2002 at 10:47 PM Quote Link to comment Share on other sites More sharing options...
boa12 Posted January 14, 2002 Author Share Posted January 14, 2002 thank tbren! couldn't find that for the life 'o me. higher than i suspected for subs. those lows just don't sound that loud to the naked ear ------------------ My Home Systems Page Quote Link to comment Share on other sites More sharing options...
TheEAR Posted January 15, 2002 Share Posted January 15, 2002 Nice,the 4642A looks like a solid performer.101dB 1W/1M and can take some serious wattage! TheEAR(s) Now theears Quote Link to comment Share on other sites More sharing options...
Recommended Posts
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.