JKent Posted March 9, 2012 Report Share Posted March 9, 2012 Good quality drivers but you should follow Pete's recommendations of adding inductors and additional mass. Hope you are successful resurrecting those great speakers. Please report back on your progress. And we (I) love photos I'll be interested to see what, if any, cabinet mods are needed for the new woofers.Kent Link to comment Share on other sites More sharing options...
lollo85 Posted March 9, 2012 Author Report Share Posted March 9, 2012 Thanks Jkent, today I brought the speakers to the carpenter to change the hole, and restore the wood, soon I will insert the pictures.Meanwhile,I thank you and Pete for important informations and support Link to comment Share on other sites More sharing options...
lollo85 Posted March 25, 2012 Author Report Share Posted March 25, 2012 Could you tell me if the schema is correct?I've not understood if the inductor must be 0.5 or 1.0 mHThanksor Link to comment Share on other sites More sharing options...
Pete B Posted March 28, 2012 Report Share Posted March 28, 2012 Both are correct. You don't need to use a heavy gauge inductor the single 1 mH is good and 18 ga is fine. Link to comment Share on other sites More sharing options...
lollo85 Posted March 28, 2012 Author Report Share Posted March 28, 2012 Link to comment Share on other sites More sharing options...
lollo85 Posted March 28, 2012 Author Report Share Posted March 28, 2012 Link to comment Share on other sites More sharing options...
Pete B Posted March 28, 2012 Report Share Posted March 28, 2012 Nice work! How do they sound? Link to comment Share on other sites More sharing options...
bigyank Posted March 28, 2012 Report Share Posted March 28, 2012 Thanks for reply Pete. My budget is around $ 450, but i prefer to find something from the catalog, are not very experienced in making these experiments.Searching the internet, I found 2 interesting woofer, what do you think?I enclose the translation of the original specifications of the woofer allison.Sensitivity (dB-SPL)2.83volts@1meter 87+ Nominal Loudspeaker Imp. (Ohms) 4 Voice Coil DC Resistance (Ohms) 3,1 Magnetic Gap Flux Density (Gauss) 8.000 Magnet Weight (Oz.) 19 Magnet/Assembly Weight (Oz.) 53 Magnetic Gap Height (Inches) 0,37 Voice Coil Winding Total Length (Inches) 0,87 Total Voice Coil Overhang (inches) 0,5 Voice Coil Linear Excursion Xmax (+/- inches) 0,25 Nominal Voice Coil Diameter (Inches) 1,5 Effective Diaphragm Piston Diameter (Inches) 8,4 Diaphragm Weight (Grams) 54 Fs - (Hz) - Free Air Resonance of Driver 22 Voice Coil Damping/Cooling Material None Qms - Q at Fs, Mechanical Resistance Only 2,74 Qes - Q at Fs, Electrical Resistance Only 0,59 Vas(cubic inches) - Volume of Air with Same Compliance as the Driver Suspension 9.281 Continuous or Avg. Power Handling at Any Frequency (Watts) 250 check out this woofer, and tell me what do you think:http://www.scan-spea...26w-4534g00.pdfalso this:http://www.ciare.com...logo/CW256Z.pdfSo are these the scanspeak woofers you used, the 26W/4534G00? Looks awesome. So, let us know how your testing results come out. Link to comment Share on other sites More sharing options...
lollo85 Posted March 28, 2012 Author Report Share Posted March 28, 2012 the sound is great, the bass is not exaggerated, I like it so much; but my nad 3240pe (40w +40 w) is a little effort. I should find a more powerful amplifier.The speakers are Scanspeak 26W/4534G00 4 OhmThanks Pete for the support Link to comment Share on other sites More sharing options...
bigyank Posted March 29, 2012 Report Share Posted March 29, 2012 I use an SAE 2401 (250 watt/ch) with my Allison One's. Gives them the "grunt" they need. Link to comment Share on other sites More sharing options...
Pete B Posted April 7, 2012 Report Share Posted April 7, 2012 the sound is great, the bass is not exaggerated, I like it so much; but my nad 3240pe (40w +40 w) is a little effort. I should find a more powerful amplifier.The speakers Thanks Pete for the supportYou're welcome, nice to see them working again!Please let us know how they work out with more power if you do get another amp, or any futher comments you might have. Link to comment Share on other sites More sharing options...
thechatterboxman Posted April 14, 2012 Report Share Posted April 14, 2012 Okay gentlemen. First, let me say that you have totally left me in the dust with all of this techno-talk. However, I recently had a rubber preservative product from a very well respected company cause the rubber surrounds on the woofers of my primary speakers to crinkle up like the Wicked Witch of the West. Tim Stinson of Luminous Audio Technology and Albert Von Schweikert collaborated on the speaker design. The speakers are prototypes that originally came with Peerless 831759 woofers, but those drivers are NLA. Albert Von Schweikert suggested the Scan Speak 26W/4534G woofers as the closest replacement available for the ruined Peerless drivers. I ordered a pair of the Scan Speak drivers. Getting them to fit was a real bear, because it is hard to cut through inch-thick MDF with a cheap jig saw. However, the deed was done, and the woofers sound quite nice, especially after the surrounds had some time to loosen up. I would say that to my very untrained eye, the Scan Speak drivers looked reasonably well-made. I am no expert on this topic, but the Scan Speaks got my main speakers going again and the bass sounds quite nice. I cannot say that the drivers are perfect for your application, but I would not hesitate to use the Scan Speaks, IF they are close to what you need, specification-wise.I am lucky that I had my Dyna A-50's to fall back on while the melodrama of the ruined woofer surrounds played out.Randy Link to comment Share on other sites More sharing options...
thechatterboxman Posted April 14, 2012 Report Share Posted April 14, 2012 I have apparently done what I do best...confuse myself. I thought I was at the end of the thread when I posted the above comments.I am glad the drivers worked out for you. It was not a bad idea to have a carpenter do the woodworking part of the job on a pair of classic speakers like those. They look really nice, and I bet they sound nice too. The Scan Speak woofers have a very nice, controlled sound.I agree that you might be able to use more power. Keep us informed.Randy Link to comment Share on other sites More sharing options...
JKent Posted April 14, 2012 Report Share Posted April 14, 2012 I recently had a rubber preservative product from a very well respected company cause the rubber surrounds on the woofers of my primary speakers to crinkle up like the Wicked Witch of the West. Bummer. But if that's all that's wrong I hope you did not chuck them. Surrounds are easily and cheaply replaced. Either buy a kit from MSound or ship them out to Millersound to have it done professionally.So do you still have the Witches?Kent Link to comment Share on other sites More sharing options...
thechatterboxman Posted April 14, 2012 Report Share Posted April 14, 2012 Yes, I do. They are sitting on the floor behind me as I write this. The folks I contacted all wanted to put foam surrounds on the Peerless drivers, which would alter their characteristics to an unacceptable degree. The original surrounds are Butyl rubber.The product I used is called "CaiKleen RBR," which is marketed by Caig. The product worked great on everything from RTR tape rollers to automotive wiper blades. It didn't damage the Focal Kevlar upper-bass/midrange drivers in my main speakers, the woofers in my A-50's, or the Scan Speak drivers I bought to replace the Peerless units. However, the surrounds on the Peerless drivers shriveled up before my eyes, one more than the other.My speakers do not use grilles of any kind, which means the drivers have been exposed to a fair amount of sunlight over the years. The Focal drivers were replaced some years ago, but the Peerless drivers were the original ones. I don't know if exposure to UV light had anything to do with the surrounds' demise or not. I just know that I was bummed when it happened!Randy Link to comment Share on other sites More sharing options...
JKent Posted April 14, 2012 Report Share Posted April 14, 2012 If anyone on the planet can repair the woofers properly it's Bill LeGall of Millersound. Try emailing him and tell him your problem: Millerspkr@aol.com Link to comment Share on other sites More sharing options...
thechatterboxman Posted April 14, 2012 Report Share Posted April 14, 2012 Hello Kent--I may do so, but I expect the Scan Speak woofers/subwoofers, (below 100 hz. in this design,) will probably last me until I am deaf, dead, or both. I would like to have the Peerless drivers fixed, but...then, I would have to find something to do with them. I am not sure that they would still fit into the openings in my subwoofer cabinets. I had to enlarge the openings a surprising amount to get the Scan Speak baskets to fit in the holes that were orginially cut, much more nicely, for the Peerless drivers.I wish I had stumbled onto this forum sooner. I have cut and pasted your last post with the gentleman's email address. Thank you very much.Randy Link to comment Share on other sites More sharing options...
bigyank Posted April 15, 2012 Report Share Posted April 15, 2012 If anyone on the planet can repair the woofers properly it's Bill LeGall of Millersound. Try emailing him and tell him your problem: Millerspkr@aol.comHe will be rehabbing the last 2 of my mids later this year. I also am doubly blessed as door-to-door for me is a 40 minute drive to hand deliver to Bill. Link to comment Share on other sites More sharing options...
Pete B Posted April 30, 2012 Report Share Posted April 30, 2012 The Eclipse W1038R is back in stock at Madisound. I have a feeling that they have hundreds of them:http://www.madisoundspeakerstore.com/eclipse/This is an 8 ohm driver and we needed 4 ohm to put them in series. I came up with a solution that looked excellent where I put them in parallel for 4 ohms,then added significant series resistance to bring them back up to about 6 or 7 ohmswhich was required anyway because the motor is too strong. It was looking goodin simulation but I didn't finish the work. If anyone wants to try this let me know and I'llsee what I can come up with. These are excellent drivers. Link to comment Share on other sites More sharing options...
Martin Posted June 5, 2012 Report Share Posted June 5, 2012 Speaking of Allison One woofers, does anyone know what kind of dope was originally used on the cones & surrounds? The cones look new and are still nice & tacky, but the foam surrounds are starting to deteriorate. I am going to replace the foam surrounds and would like to use the same kind of sticky, black dope that was originally used. I suspect that most today's common dope products would melt a foam surround. Link to comment Share on other sites More sharing options...
RoyC Posted June 5, 2012 Report Share Posted June 5, 2012 Speaking of Allison One woofers, does anyone know what kind of dope was originally used on the cones & surrounds? The cones look new and are still nice & tacky, but the foam surrounds are starting to deteriorate. I am going to replace the foam surrounds and would like to use the same kind of sticky, black dope that was originally used. I suspect that most today's common dope products would melt a foam surround.The material was a butyl/latex compound similar to the treatment on very early AR foam surround woofers. There is nothing available today which will not compromise the compliance of foam. You are better off not applying anything at all.Roy Link to comment Share on other sites More sharing options...
Martin Posted June 5, 2012 Report Share Posted June 5, 2012 Thanks, Roy. I'll keep them uncoated and will report back when I'm finished. Link to comment Share on other sites More sharing options...
bigyank Posted September 16, 2013 Report Share Posted September 16, 2013 Speaking of Allison One woofers, does anyone know what kind of dope was originally used on the cones & surrounds? The cones look new and are still nice & tacky, but the foam surrounds are starting to deteriorate. I am going to replace the foam surrounds and would like to use the same kind of sticky, black dope that was originally used. I suspect that most today's common dope products would melt a foam surround.I sound like a broken record in this thread. Bill LeGall just fixed the one woofer I have that I wrote about had the buzzing noise when certain soundtracks were played. He has come up with a replacement formula for the coating and used in on my woofer and it looks awesome! I can post a pic of it is anyone wants to see it. Oh and the buzzing noise is long gone! Link to comment Share on other sites More sharing options...
StereoDude Posted March 20, 2014 Report Share Posted March 20, 2014 I sound like a broken record in this thread. Bill LeGall just fixed the one woofer I have that I wrote about had the buzzing noise when certain soundtracks were played. He has come up with a replacement formula for the coating and used in on my woofer and it looks awesome! I can post a pic of it is anyone wants to see it. Oh and the buzzing noise is long gone! Yes, I would like to see it. Thanks. Link to comment Share on other sites More sharing options...
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