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Analogman

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Everything posted by Analogman

  1. Analogman

    Advent crossovers and schematic

    Replace your surrounds, change the electrolytic for a film type and leave the balance of the parts alone There is absolutely no need to change either the cement wirewound or the coil None Craig
  2. Analogman

    Blown New Advent driver

    Edzll, got your speakers fixed? Craig
  3. working on improving your odds?
  4. Analogman

    Advent crossovers and schematic

    Install a couple of L-pads on the back for the mids and tweeters (I also realize this is an ancient thread as well! : - ) If that doesn't solve your complaints you can always fill the holes with dowels and let the speakers remain (put them back by just moving a few wires) as designed, i.e. 100% reversible with no damage whatsoever to your cabinets Low time and materials cost, may make you happy and the L-pad approach is a minimally intrusive, cheap, no harm no foul approach Will also allow for tuning "around" your room's limitations/impositions as well as your own personal preferences - same as any good monitor I'd try that first (and have, many times) before I re-invented the wheel and started rolling dice on "new and improved" networks and "mods" sound unheard
  5. You announced this on every audio forum on the web, on the day of the event no less yet you didn't have anyone record it and post it to YouTube? So we can all enjoy it and learn from it? (I looked because I wanted to see/hear it) Or is the plan you're going to release it on DVD or one of the streaming outfits and monetize your great insight in perpetuity Smart play - genius, just pure genius On another possibly more serious note; do you have a real job? I am retired (that's my excuse), so yes, I am here on the forums quite a bit and see your posts everywhere and all the time What gives? What exactly is it that you have to sell aside from what an electronics genius you are (if I read the references to those 3 expired patents you don't even own one more time I think I will pluck my eye balls out) Craig
  6. Analogman

    Info on The Advent/1 re-foam.

    Hey, you're not the guy who gave us "stadium" night club" "arena" "Jazz" etc etc are you? (actually, Telefunken did that almost 60 years ago but in the Analog domain) Never been a big fan of engineered tone controls, for a multitude of reasons - I enjoy the most the recordings from the "golden age" that got it right the first time (Van Gelder, Fine, Ludwig, Martin, Grundman and many many more too numerous to list all here) People who could/can hear And they did it all before the silicon chip (or computers!) Not a big fan of devices employing boatloads of IC architecture either (and so called "engineers" determining for me how my Music, equipment or mix, should sound) but rather Masters of Good Microphone Placement and Arrays The Blumlein pair is one of my favorites but RCA and Mercury were pretty creative as well! (I am a HUGE fan of minimalism when it comes to recording) As for your documentation on watching transmission line design behaviors and documenting them, THANK YOU, librarians are very important for us all And a big Analogman "shout out" to Stromberg-Carlson and "Bud" Fried for all that heavy lifting! That all being said, I am not a patent holder I am sorry to confess, so you are one of a kind in this dialog Congratulations and all the best Craig
  7. Claimed and picked up Thanks to all Craig
  8. https://sfbay.craigslist.org/eby/ele/d/free-cambridge-soundworks/6567969763.html FREE - Cambridge Soundworks BassCube 12S Subwoofer (concord, california ) FREE IF YOU COME PICK IT UP RIGHT NOW - 4/24/2018 Needs work Good shape, a few scuffs on cab - driver cone and surround perfect Speaker level spring loaded INPUT connectors messed up (missing) - line level jacks fine and work Problem is bad plate amp - I already replaced the notorious Zeners that fail on these, moved the power resisters onto the other side of the board so as not to cook them again and touched up every solder pad on both boards Still, no love and I'm not willing to pursue troubleshooting this any further (or paying for Fry's over priced bits) Sub will play fine and then instantaneously stop - switch it off and back on and it will work again briefly Customer support for Cambridge products is non-existent (no schematics available), so, this time vampire is beyond my skill set Someone who really knows Solid State could probably diagnose this in a half hour or less - I'm done Parts Express sells the same amp (100 Watts, drop in fit) for around $100 bucks with a 5 year warranty $10 bucks CASH and Carry AS IS - FREE IF YOU PICK IT UP NOW No Phone Number No reply Thanks
  9. Analogman

    Info on The Advent/1 re-foam.

    I don't know why such a simple law of physics is so difficult for you to acknowledge I have said now at least a dozen time now - ALL ELSE BEING EQUAL THE SHAPE OF A TRANSDUCER'S MAGNET MAKES NO DIFFERENCE Everything you speculate on can be as easily accomplished with a round magnet structure as a square It's obvious that if two transducers are of entirely different designs then that is another subject altogether Try reading Huw Howell's piece on the subject; I posted the link I would think he and Winslow Burhoe would have a little more insight into the topic than you, no intent to damage your seemingly fragile ego Unless you yourself are responsible for some of the most revolutionary designs in audio of which I am not aware (along with Henry Kloss and Arnie Nudell)? Craig
  10. Analogman

    Info on The Advent/1 re-foam.

    The shape of the magnet on any given transducer makes absolutely no difference That IS the point as well as a matter of fact Pete B, you keep changing and qualifying and quantifying your insistence that it does In the case of the woofers up for discussion here you have no evidence of your persistent claims other than pure speculation and the word "geometry" based entirely on your asumptions Not a very technical or scientific approach With all things being equal, the shape of a transducer's magnet MAKES NO DIFFERENCE Your insistence in doing so is a disservice to members who for some reason have faith in what you say causing them to waste time tracking down worn out old drivers as well as giving rise to performance angst when what they have is perfectly suitable for the job (and system) at hand not to mention authorized factory replacements All for the irrelevant shape of the magnet
  11. Analogman

    Info on The Advent/1 re-foam.

    Try actually reading my posts Like the part(s) where I have said, SEVERAL TIMES - "all things being equal" about a dozen times now I've also indicated (and acknowledged/agreed) more than once now that shape can be an aid in determining the vintage of a given driver (obviously) I don't deal in "probably" But I'll say it this more time: MAGNET SHAPE MAKES ABSOLUTELY NO DIFFERENCE WITH REGARDS TO SONICS IF ALL OTHER PARAMETERS ARE EQUAL PERIOD IDENTICAL WOOFERS AS FOR PERFORMANCE WERE PRODUCED WITH BOTH - NOT JUST BY ADVENT
  12. Analogman

    Info on The Advent/1 re-foam.

    http://www.humanspeakers.com/essays/square-magnet.htm
  13. Analogman

    Info on The Advent/1 re-foam.

    The outer shape of the magnet makes NO DIFFERENCE What matters with the magnet is gauss, meaning it's magnetic flux density (magnetic induction) What DOES matter is orientation of pole piece, gap and distance to back plate (and where the VC's windings sit at rest) Klipsch (simply because they are a very good example of this) sold many many many replacement woofers that had square magnets whereas the woofers that came in the cabinets were originally round* (* possibly I have this vice versa, senior memory moment, haven't bought a replacement driver from Klipsch since P.W.K. was alive - all I know is that they did it with regularity) I used to be a Klipsch hoarder They were, and are, electrically (and most importantly) FUNCTIONALLY/SONICALLY identical, all else being equal As a matter of fact, I, until recently, owned (purchased by me) an all original untouched, one owner, bought NEW, pair of Cornwalls and one cab contained a square magnet woofer and the other a round - Klipsch (as most of them did) used what was on the assembly line until it was exhausted and then made the switch to the next batch/run of inventory of any given part # - and guess what? I got the pair chronicling just that event as they were consecutively numbered grain matched boxes Sure, if one driver has a different MOTOR structure, or cone or voice coil then obviously there is and will be a difference, on several levels, but as for a "all things being equal" situation I will say it now for the tenth time The SUPERFICIAL Shape Of The Magnet Makes No Difference Unless is just Happens to Occur on an entirely Different Transducer What matters is the flux density This is why manufacturers publish specs for their individual drivers and production changes in magnet shapes is/was extremely common back in the day I would not rely simply on magnet shape in assuming a given transducer is an exact match for another driver The only practical thing it's good for is as an aid to help identify and date some transducers - beyond that it means nothing No speaker manufacturer "makes" any of the magnets they use and the choice of magnet used on any given design all depends on the vendor contracted to produce them It might make some folks feel better to have matching pairs when it comes to magnet shape then so be it - but if the published PERFORMANCE parameters and the part number is correct the rest is all in your head THE ONLY REASON SQUARE MAGNETS AND PLATES WERE/ARE USED IS BECAUSE THEY ARE CHEAPER AND EASIER TO MAKE - THAT'S IT - FULL STOP Now the Alnico versus ceramic is another debate! Craig
  14. Analogman

    AR9LS Refoam question

    A straight edge And I understood your point; was not saying there was anything wrong or invalid with using shims, and I do, on re-cone jobs But like I said, I don't (just) re-edge drivers with worn out spiders, at least not for others I have been guilty of "patching" a few for myself Craig
  15. Analogman

    AR9LS Refoam question

    I hear what you are saying and agree 100%, and of course there is nothing in this world (involving machines) that is ever the answer 100% of the time Speakers with worn out spiders get a re-cone (with new spider) rather a re-edge on my bench (if it is a job I have to stand behind) The 30 Hz method works beautifully on otherwise healthy drivers only in need of a new outer suspension - I thought that would go without saying Excursion, and outer cone lip at rest height in relationship to the basket flange is easily adjusted on a case by case basis and is perfectly compatible with the test tone alignment protocol - I would have thought that too would have gone without saying Regardless, no matter the method used, if the spider is sagging it's still going to sag whether you used shims or not and the end results is still a patch job - may last a week, may last another 20 years Aside from the fact that the outer suspension's job isn't (should not be relied upon) to establish and maintain the former's relationship to the back plate at rest because as you well know, that's not going to last for long (those DIY re-foamed woofers that "knock" or "tick" when you play them loud! : - ) I don't like having to revisit work anymore than the next guy - I have done many dozens of drivers with the 30 Hz tone technique and to my knowledge not one has yet to fail or suffer any problems (knock on wood : - ) and most definitely none of my personal drivers have I also agree with you that more than a few do-it-yourselfers have hacked up their woofers Craig
  16. Analogman

    AR9LS Refoam question

    Use a 30 Hz test tone while re-edging and forgo the need to cut off dust caps on these fragile old drivers Works well The hole is (may be) for cooling, à la JBL - shine a bright light into them while observing the front of the cone (dust cap) If you can see any sign of light then that's definitely what they are - spares the VC and former as well as helps up the power handling of the driver Not a bad idea to glue a bit of screen mesh over them after you're done with your repair and before you put them back in the cabinets If they are cooling ports for the VC, trash can migrate into the gap - that's why you see a screen over that hole on JBL drivers Craig
  17. Analogman

    Blown New Advent driver

    Yeah, Parts Express and ePay are real danger zones for browsing AND you are correct, you probably are better off listening to "Pete" because at this rate you're not going to be listening to a PAIR of anything anytime soon, so it may as well be "Pete" in the meantime - this "conversation" has been going on for 2+ months now Good luck getting your "Advents" going Craig
  18. Analogman

    Blown New Advent driver

    So what? It has nothing to do with the model "Advents" up for discussion
  19. Analogman

    Blown New Advent driver

    Magnet shape is irrelevant
  20. Analogman

    Blown New Advent driver

    I suggested that the hole diameters be verified The advice that I dispensed here was excellent from my point of view and in this particular situation fits the bill perfectly He wants to get his speakers working so he can listen to Music AND for as little money as is possible Capeesh? I sent you a PM getting a little more specific Craig
  21. Analogman

    Blown New Advent driver

    What is the diameter of the woofer's hole? Everyone selling new (the pin cushion style frame like yours) at reasonable prices are sold out These may work, if not there are other to check out as possible candidates All you need to be concerned with is nominal impedance and hole diameter - the one below would be a good match if your cabinet allows - well reviewed to boot: https://www.parts-express.com/grs-10pf-8-10-paper-cone-foam-surround-woofer--292-410 The one above is the same woofer this joker is selling for more than twice as much and he's sold over 700 of them: https://www.ebay.com/itm/NEW-10-Woofer-Speaker-Home-Audio-8ohm-bass-replacement-sound-220w-10inch-stereo/181090495264?hash=item2a29d5ab20:g:dt8AAOSw9r1WCGsg All the affordable 10"s: https://www.parts-express.com/cat/woofers/15?N=19809+4294967118+4294965083&Ne=10166&Nrs=collection()%2Frecord[endeca%3Amatches(.%2C"P_PortalID"%2C"1")+and+endeca%3Amatches(.%2C"P_Searchable"%2C"1")]&PortalID=1
  22. Analogman

    Blown New Advent driver

    The shape of the magnet makes absolutely no difference The power of the magnet does The speakers up for discussion are a Jensen Electronics era product and that 10" cone and motor are as common as dirt (which most of you already know I am sure) The flange mounting is simply a cosmetic nod to the "real" Advents built by Henry and does prove to be a pain to source currently Find a pair of new Jensen Electronics 10"s (from or for any of the multitude of their "Advent" 2-ways) and bolt them in, that or simply re-cone them (parts are readily available for that) "Legacy" "Legacy II" etc etc etc This is not a complicated problem - not the same as restoring a pair of "real" once built by Henry Kloss Advents Not trying to sound ugly, but you can probably buy another pair of any of the dozen "versions" of the 10" two ways Jensen Electronics churned out during the late '80s through the '90s for less than having yours properly repaired and still have the same speakers (read: paying someone else to fix them for you) With the exception of the VERY first models sold in '81 - '82 post bankruptcy time, none of these systems have anything to do with Henry Kloss' ADVENTs except in name/some cosmetics only (and marketing inspiration) I wouldn't make a big deal, jump through hoops, spend a lot of money or fret too much on any level over keeping them "original" - fitment of any of those 10"s with the same nominal impedance rating and they'll sound the same, perfectly fine Craig
  23. Analogman

    WTB: Magnavox Remote

    Not a New England speaker item but definitely "vintage" in terms of electronics Fairly long shot but they do turn up; I am looking for an ancient Magnavox remote, model MER 061 Always find the listings AFTER they've sold : - ( Please PM me if you got and want to get rid of Thanks Craig
  24. Analogman

    AR-2ax SOLID BRASS Version Badge

    Klipsch badge sold All brass AR-2ax badge still available Craig
  25. Analogman

    Market for AR-11

    That goes for about 99.9% of all worthwhile vintage systems no matter the maker
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