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#1
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Replacing Blown Woofers
Got a couple pairs of older 4-way speakers, and I'm trying to consider what
to do with them. Mainly, I'd like to repair these Technics SB-G500's. These are huge 300-watt speakers with 15" woofers. One of the woofers is completely destroyed, other than that they are in perfect shape. I'm just wondering how feasible it would be, to replace not one but both woofers (to avoid any unbalanced sound) with generic replacements. I can get some Zebra woofers for about $50 Cdn. apiece. But would it be worth it? The only possible problem, is that the original woofers were 4 ohm, and the only replacements available are 8. Is it possible to modify the wiring somehow, to suit 8-ohm replacements? Thanks for any advice. |
#2
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Replacing Blown Woofers
Chris F. wrote:
Got a couple pairs of older 4-way speakers, and I'm trying to consider what to do with them. Mainly, I'd like to repair these Technics SB-G500's. These are huge 300-watt speakers with 15" woofers. One of the woofers is completely destroyed, other than that they are in perfect shape. I'm just wondering how feasible it would be, to replace not one but both woofers (to avoid any unbalanced sound) with generic replacements. I can get some Zebra woofers for about $50 Cdn. apiece. But would it be worth it? The only possible problem, is that the original woofers were 4 ohm, and the only replacements available are 8. Is it possible to modify the wiring somehow, to suit 8-ohm replacements? No. These speakers are not worth your time to fool with them. Almost anything else I would suggest trying to do a recone, if only for the experience of learning to do the work. But these speakers are not worth your time and trouble. You cannot drop drivers in... the impedance not only needs to match, but the resonant frequency, the width the the resonance, the efficiency, and the required springiness of the air behind the driver need to be at least approximately the same. You could probably find a good match for the original drivers with some tinkering, but at best you'd wind up with speakers that sounded like they did new, which was very bad. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
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Replacing Blown Woofers
"Chris F." wrote in message ... Got a couple pairs of older 4-way speakers, and I'm trying to consider what to do with them. Mainly, I'd like to repair these Technics SB-G500's. These are huge 300-watt speakers with 15" woofers. One of the woofers is completely destroyed, other than that they are in perfect shape. I'm just wondering how feasible it would be, to replace not one but both woofers (to avoid any unbalanced sound) with generic replacements. I can get some Zebra woofers for about $50 Cdn. apiece. But would it be worth it? The only possible problem, is that the original woofers were 4 ohm, and the only replacements available are 8. Is it possible to modify the wiring somehow, to suit 8-ohm replacements? Thanks for any advice. find a 4 ohm unit a 8 ohm unit is not suitable I make no judgement other than I would not bother to repair any technics home stereo speakers George --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.595 / Virus Database: 378 - Release Date: 2/25/2004 |
#4
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Replacing Blown Woofers
No. These speakers are not worth your time to fool with them. Almost anything else I would suggest trying to do a recone, if only for the experience of learning to do the work. But these speakers are not worth your time and trouble. You cannot drop drivers in Scott I bet he might find a pair of working complete speakers for 20 bucks or so in a salvation army store George --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.595 / Virus Database: 378 - Release Date: 2/25/2004 |
#5
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Replacing Blown Woofers
Strange, the guy I got 'em from claims to have paid $1800 Cdn. for the
pair, back in the early 80's. You'd think they would have been half decent. Says he also paid $3k for a custom-built Technics 600 watt amp. More money than brains, perhaps? BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? "George Gleason" wrote in message ... "Chris F." wrote in message ... Got a couple pairs of older 4-way speakers, and I'm trying to consider what to do with them. Mainly, I'd like to repair these Technics SB-G500's. These are huge 300-watt speakers with 15" woofers. One of the woofers is completely destroyed, other than that they are in perfect shape. I'm just wondering how feasible it would be, to replace not one but both woofers (to avoid any unbalanced sound) with generic replacements. I can get some Zebra woofers for about $50 Cdn. apiece. But would it be worth it? The only possible problem, is that the original woofers were 4 ohm, and the only replacements available are 8. Is it possible to modify the wiring somehow, to suit 8-ohm replacements? Thanks for any advice. find a 4 ohm unit a 8 ohm unit is not suitable I make no judgement other than I would not bother to repair any technics home stereo speakers George --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.595 / Virus Database: 378 - Release Date: 2/25/2004 |
#6
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Replacing Blown Woofers
Chris F. wrote:
Strange, the guy I got 'em from claims to have paid $1800 Cdn. for the pair, back in the early 80's. You'd think they would have been half decent. You can spend lots of money for the best car Hyundai makes, with every possible feature. But you won't get a low end Mercedes. Says he also paid $3k for a custom-built Technics 600 watt amp. More money than brains, perhaps? Technics is not exactly known for custom-built products. Sony, maybe. BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. These might be worth some of the trouble, because it will at least be less trouble. But these are also not exactly quality speakers. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Somebody bought them from a white van, didn't they? --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#7
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Replacing Blown Woofers
"Chris F." wrote in message ... Strange, the guy I got 'em from claims to have paid $1800 Cdn. for the pair, back in the early 80's. You'd think they would have been half decent. Says he also paid $3k for a custom-built Technics 600 watt amp. More money than brains, perhaps? BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Sorry I just think 99% of home stereo give the rest a bad name Belise Acoustic labs makes a decent speaker in canada www.bal.com George --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.595 / Virus Database: 378 - Release Date: 2/26/2004 |
#8
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Replacing Blown Woofers
"Chris F." wrote in message
Strange, the guy I got 'em from claims to have paid $1800 Cdn. for the pair, back in the early 80's. You'd think they would have been half decent. Says he also paid $3k for a custom-built Technics 600 watt amp. More money than brains, perhaps? BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Here are good Canadian brands of home audio speakers: Paradigm PSB Energy to name a few. Not everything they make is excellent but it is mostly pretty credible stuff. If Technics made a good-sounding speaker it was arguably an accident. Please find a store that carries and demos them. You might find it to be an ear-opening experience. |
#9
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Replacing Blown Woofers
Scott Dorsey wrote: Chris F. wrote: While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Somebody bought them from a white van, didn't they? Ahhh - you have that scam over there too. The guy I know who got suckered was told they were Acoustic Research IIRC. Funny thing is - he likes them ! Graham |
#10
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Replacing Blown Woofers
Chris F. wrote in message
... BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. You'd be guessing right. If you replaced the blown woofers with exact copies of the originals, they would sound as bad as the originals. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Much too good to be true. 1000W speakers (meaning speakers that will take 1000W under real-world conditions for more than a microsecond) sell for many thousands of dollars, are quite large, and have names like Electro-Voice. They're used for concerts, not for homes. The speakers you're talking about, generic, are typically a $5 cabinet with $5 worth of drivers in them and *maybe* a capacitor for a crossover, but don't count on it. The magnets are tiny, there's no stuffing inside, and they sound like crap when they work at all. Real power rating is about 25W. They're typically sold by a couple of guys in a white van who offer you a fantastic deal because they had extras they were supposed to deliver to a stereo store and don't want to haul them back to the shipper, or some nonsense like that. They are, in two words, a scam. It is an open question which sounds worse: these generic scam speakers, or the Technics speakers which you originally asked about it. I used to work on both, and both are awful. Peace, Paul |
#11
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Replacing Blown Woofers
The 1000-watt'ers in questions are distributed by Global Electronics, dunno
if anyone has seen these things or not. They have two 10" woofers on each speaker, plus a tweeter and midrange. Looks nice, but like I say, sounds like too good of a deal. I assume they are made in Canada, as Global prefers to stock only Canadian products. "George Gleason" wrote in message ... "Chris F." wrote in message ... Strange, the guy I got 'em from claims to have paid $1800 Cdn. for the pair, back in the early 80's. You'd think they would have been half decent. Says he also paid $3k for a custom-built Technics 600 watt amp. More money than brains, perhaps? BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Sorry I just think 99% of home stereo give the rest a bad name Belise Acoustic labs makes a decent speaker in canada www.bal.com George --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.595 / Virus Database: 378 - Release Date: 2/26/2004 |
#12
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Replacing Blown Woofers
Chris F. wrote:
The 1000-watt'ers in questions are distributed by Global Electronics, dunno if anyone has seen these things or not. They have two 10" woofers on each speaker, plus a tweeter and midrange. Looks nice, but like I say, sounds like too good of a deal. I assume they are made in Canada, as Global prefers to stock only Canadian products. First of all, you should be VERY wary of anything that advertises their rated input power as the main advertising point. Secondly, you should listen to them. If you can't get a natural vocal sound out of them, run away. There are so many fine Canadian speakers out there, a result of Floyd Toole and the NRC folks providing subsidized resources to speaker designers, that there is no reason to buy crap. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#13
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Replacing Blown Woofers
Scott Dorsey wrote in message ... First of all, you should be VERY wary of anything that advertises their rated input power as the main advertising point. Secondly, you should listen to them. If you can't get a natural vocal sound out of them, run away. Paul Klipsch used to say that advertising how many watts a speaker would soak up was like advertising how much gas a car guzzled. Peace, Paul |
#14
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Replacing Blown Woofers
On Sun, 07 Mar 2004 23:36:05 GMT, "Paul Stamler"
wrote: Paul Klipsch used to say that advertising how many watts a speaker would soak up was like advertising how much gas a car guzzled. He once proposed a model LSH, loudspeaker and space heater. The heat sink fins on the back were eerily prescient of modern powered subwoofers. Including Klipsch brand. Its integral resistive pad would also give it a nice flat impedance curve. Gotta love it. Chris Hornbeck "Second star to the right, Then straight on 'til morning." |
#15
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Replacing Blown Woofers
Found out the brand name on those 1000 watt-ers in question - Audiopipe.
Sound familiar? "Pooh Bear" wrote in message ... Scott Dorsey wrote: Chris F. wrote: While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Somebody bought them from a white van, didn't they? Ahhh - you have that scam over there too. The guy I know who got suckered was told they were Acoustic Research IIRC. Funny thing is - he likes them ! Graham |
#16
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Replacing Blown Woofers
Chris F. wrote in message ... Found out the brand name on those 1000 watt-ers in question - Audiopipe. Sound familiar? Nope. It's the kind of generic "brand name" the white van guys always use. Peace, Paul |
#17
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Replacing Blown Woofers
"Paul Stamler" wrote in message ...
Chris F. wrote in message ... BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. You'd be guessing right. If you replaced the blown woofers with exact copies of the originals, they would sound as bad as the originals. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Much too good to be true. 1000W speakers (meaning speakers that will take 1000W under real-world conditions for more than a microsecond) sell for many thousands of dollars, are quite large, and have names like Electro-Voice. They're used for concerts, not for homes. The speakers you're talking about, generic, are typically a $5 cabinet with $5 worth of drivers in them and *maybe* a capacitor for a crossover, but don't count on it. The magnets are tiny, there's no stuffing inside, and they sound like crap when they work at all. Real power rating is about 25W. They're typically sold by a couple of guys in a white van who offer you a fantastic deal because they had extras they were supposed to deliver to a stereo store and don't want to haul them back to the shipper, or some nonsense like that. They are, in two words, a scam. It is an open question which sounds worse: these generic scam speakers, or the Technics speakers which you originally asked about it. I used to work on both, and both are awful. Peace, Paul Heh, heh, anybody remember those 1970's Technics speakers called "Thrusters"? Something oddly phallic in that name, which makes sense because they were largely marketed in mags like Penthouse at the time (hey I was reading the articles!); and having a huge stereo was sort of a penis envy thing back then. These days I guess it's huge speakers in Honda Civics... Analogeezer |
#18
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Replacing Blown Woofers
Analogeezer wrote:
"Paul Stamler" wrote in message ... Chris F. wrote in message ... BTW I also have a pair of Pioneer HBM-60 (or something like that) needing 8-inch woofers, and I'm guessing these wouldn't be worth the trouble either. I guess there's a lot more to speaker design than I thought. You'd be guessing right. If you replaced the blown woofers with exact copies of the originals, they would sound as bad as the originals. While I'm on the subject, what do you think about a pair of generic 1000-watt speakers, selling for $220 Cdn, brand new? Too good to be true? Much too good to be true. 1000W speakers (meaning speakers that will take 1000W under real-world conditions for more than a microsecond) sell for many thousands of dollars, are quite large, and have names like Electro-Voice. They're used for concerts, not for homes. The speakers you're talking about, generic, are typically a $5 cabinet with $5 worth of drivers in them and *maybe* a capacitor for a crossover, but don't count on it. The magnets are tiny, there's no stuffing inside, and they sound like crap when they work at all. Real power rating is about 25W. They're typically sold by a couple of guys in a white van who offer you a fantastic deal because they had extras they were supposed to deliver to a stereo store and don't want to haul them back to the shipper, or some nonsense like that. They are, in two words, a scam. It is an open question which sounds worse: these generic scam speakers, or the Technics speakers which you originally asked about it. I used to work on both, and both are awful. Peace, Paul Heh, heh, anybody remember those 1970's Technics speakers called "Thrusters"? Yup. Monolithic passive radiator boxen tuned to 100Hz and not much else. I have a pair of JVC 3-way of the same ( slightly later ) era that still serve as the "movie speakers". Excellent for cheezy box store junk... nice mix checkers... Something oddly phallic in that name, which makes sense because they were largely marketed in mags like Penthouse at the time (hey I was reading the articles!); and having a huge stereo was sort of a penis envy thing back then. I have heard, and would tend to believe, that Hugh Hefner invented non-hobbyist* HiFi by exposure in Playboy magazine ( which was half about mammalian protuberences and half about which fork to use for rawbowned kids who hadd move offa the farm to The Big City after WWII...). *Meaning hobbyist=soldering/non-hobbyist=non-soldering... So it's no wonder there's a certain ... aspect to HiFi... These days I guess it's huge speakers in Honda Civics... They don't have carburetors anymore... Analogeezer -- Les Cargill |
#19
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Replacing Blown Woofers
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#20
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Replacing Blown Woofers
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