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  1. For those like myself, who've had the privilege of owning some of the 1950's examples of the Klipschorn - with massive Stephens and EV Alnico woofers, 6x13 slot motorboards and wood/fiberglass K5J midrange horns with University SAHF drivers, there's always been an interest in knowing whether any performance differences exist between these early models and Klipschorns produced later in their evolution. Among the many questions, some, including myself, have always wondered: - Do the early Klipschorn bass bins with the original 6x13 throat slot and massive Alnico magnet woofers perform "better"? - Is the K400/401 a "better" midrange horn than the original final K5J? A couple of years ago I mentioned on the forum my intention to take a shot at investigating the different Klipschorn woofers and motorboards, but life got in the way and it wasn't until recently that I was able to devote the time and energy to getting that done. I've gotten a lot out of the Klipsch community over the years with a lot of help from guys with names like Al, Bob, Dave, Dean, Gil, John, Larry, Roger and many more, so here's my attempt at contributing something back. I'm not selling anything nor am I affiliated with anyone who is in the Klipsch world. Nor am I an expert at speaker measurement, and I can't claim to have golden ears. With that said, here is my report: Project Goal To measure the performance difference, if any, between various Klipschorn woofers (EV 15wk, k-33e square magnet, Crites cast replacement), Klipschorn motorboards (3x13 vs. 6x13), and the Klipschorn midrange horns (K5J vs. K400/401) and midrange drivers (University SAHF vs. K55v, m, v dual plug). Methodology To conduct the tests I: - Assembled the woofers, midrange drivers and midrange horns along with several crossover networks and woofer inductors - Made several Baltic birch motorboards with both 3x13 and 6x13 slots in 3/4", 5/8" and 3/8" thickness - master template cut for exact match and dry fit marked for exact throat aligment - Setup a 1950's Klipschorn base with a 6x13 slot bin - to accommodate 3x13 and 6x13 motorboards - in a properly sealed corner - Marked exact Klipschorn position to the corner with blue painters tape enabling exact repeat position as woofers and motorboards are changed - Setup a mic stand on center axis approximately 8ft from the Klipschorn - Umik-1 USB mic aimed at speaker with height aligned to the midrange center - Calibrated Umik-1 USB mic attached to laptop running REW measurement software with calibration file, connected to preamp system with testing volume uniformly locked at ~78db, preamp set on mono - Testing then conducted with double sound sweeps in identical conditions - All output set to 1/12 smoothing Importantly, the methodology used here is aimed at measuring the relative performance between components and not absolute performance. My experience has taught me that room conditions are the biggest factor involved, making absolute "reference" measurements far more complex than what has been done here, but these side by side comparisons have all been conducted in identical conditions and should have some validity. I will attempt to keep my comments on the results to a minimum. I'll start with the woofer/slot results first, and add the rest in the next day or two. Woofer Results IMHO, the performance turned in by the 62yr old EV 15wk woofer is impressive. One has to wonder what the measurements would look like with a brand new one in 1955. It's probably fair to say that with age, it's free air resonance is now closer to 40hz + , as opposed to the EV reference of 29hz when new. In my mind, the absolute performance of a Klipschorn bass bin in the 1950's has always been somewhat murky, with the occasional marketing pamphlet reference to full efficiency down to 36hz, and "excellent efficiency down to 30hz." But if the more modern Klipschorn bass bin has a sensitivity of 104db/1 watt/ 4ft,( or 105db/1 meter), do the Ev 15wk measurements here suggest that the old Klipschorn 6x13 bass bin with the large Alnico magnet woofers was a db or two more sensitive? In any event, it would appear that there are significant differences in the mid bass region performance. Is any of it noticeable to the ear and body? In my opinion, yes. Note: All measurements show a consistent 10-12db gap down at about 80hz due to room/furniture interference. It's ugly, but artificial. The rest is more or less in line with the general frequency response exhibited by the Klipschorn. In all cases, the k-33e and Crites cast woofer appear to measure slightly (1-2db) better in the 35hz region. Could the Ev 15wk's apparent disadvantage in the ultra low end be due to some deterioration in cone resonance due to age? The Crites cast woofer appears to improve performance over the k-33e in the 250-400hz region. Somebody knows what their doing. As expected and documented by Dr. Bruce Edgar years ago, the 6x13 slot threat presents difficulties for the newer woofers above 300hz. When using the EV 15wk in their own versions of the folded cornerhorn, EV specified a woofer inductor in the 2.8-3.0mh range. Depending upon the crossover point to the midrange, IMHO, the EV 15wk measures AND sounds good in the Klipschorn with inductors from 2.5mh to 3.0mh. In my opinion, room acoustics and personal tastes are the real determinants here. The internal 6x13 Klipschorn chamber without woofer and motorboard. Raw Klipschorn bass cabinet sealed into corner with gaskets and a custom made plywood corner backer board. The k-33e woofer installed: The Crites cast woofer installed: The EV 15wk Alnico woofer installed. I'm getting too old to be down on my hands and knees wrestling a 45lb woofer into position! Midrange Tests Here's a couple of pics I took of the assembled midrange horns, drivers and crossovers used, along with the midrange platform boards I built to easily change out the entire top section from one horn to the next. Because of the general interest in the more recent wood midrange tractrix designs for use with the Klipschorn, I've included some testing and comparison with the Volti FC260 2" throat tractrix horn using the B&C DCM50 8ohm driver. Midrange Test Results Comparisons of the K5J and K401 horns - using any of the k55 drivers, with and without networks, show a great similarity to the tests done by Paul Klipsch when introducing the "new" k400 in the early 1960's. Originally, the K5J was crossed to the tweeter at approximately 5000hz. The rough response of the K5J above 3000hz seems to illustrate why. After discussing PWK's results with several forum members in the past, it was generally agreed that while using the k55, the K5J was about 2db softer over most of its range vs. the k400. Thus, I asked Bob Crites to make a modified "a" network with -1db attenuation for use with the K5J, vs. the -3db mid attenuation used with the standard "a" network used with the K400. This brings the sensitivity back in line with the woofer and provides a better apples to apples comparison between the horns. Now it's easier to see that while the K5J is weaker on the higher end, it has some real punch in its lower range. More, tests reveal the subtle trade-offs between the k55v and k55m on the K5J horn. The k55m is usually a db or so "hotter" than the k55v in my experience, but not across the entire range and the plus/minus tradeoff is different with this horn, than with the k400/401. For those who've always wanted to see how the University SAHF driver (originally paired with the K5J) compares to the standard k55v on the K5J here is the result: SAHF compared to k55v on the K5J with the -1db mid attenuation network. Interestingly, the SAHF has more strength under 300hz than the k-55 - which has always been lauded for what few midrange drivers can do - its ability to reach down low. The SAHF also has a smoother exit response from 4000hz on, but the prominent dip between 1000-2000hz bothers me a bit. As far as the sound, my apologies, but I have spent zero time listening to the SAHF. The highly regarded K55v DUAL PLUG driver shows an interesting contrast to the k55m on the K5J. Some would say, and my personal experience agrees, that the K55v dual plug driver gives up a tad bit of sensitivity in favor of a smoother and more general extended response all the way to the promised 6000hz on the k400/401. It appears to help quite a bit here with the K5J as well. Moreover, it would probably be correct to adjust the midrange attenuation to 0 with this driver when paired with the K5J and thus delivering the best K5J/k55 performance possible, and a decent shot at using a 6000hz high frequency crossover point. Of course there may be even more K5J performance with John Allen's new A-55G mid driver, which I have yet to try. As far as the sound, they are definitely different and I greatly prefer the K5J to the k400, even with a 6000hz crossover, but I believe that personal preference and room acoustics would have a big impact on the voting. For those interested in the midrange "upgrade" path, here are the results comparing the Volti FC260 with B&C DCM driver, to the stock K400/401 and k55 setup. With a -7db attenuation setting used below, the Volti/dcm50 combination is close in sensitivity to the k401/k55m. It looks to me like a -6db attenuation setting would be an even better match, maybe -5db when paired with a Stephens or EV Alnico woofer with the 6x13 throat. The B&C DCM50 driver rolls off naturally on the FC260 around 9500hz. In this case, the custom network used here utilized a .15mh inductor in a 1st order midrange bandpass that begins the roll off at about 7500hz. IMHO, the FC260 sound is fantastic to my ears, and at a minimum, offers an alternative sound to the K400/401. Measurement and sound are two very different things, and I've never seen and heard a better example than this particular comparison - where the measurements look so close, but the sound is miles apart. Woofer & Midrange Combination Tests For those interested in how the combination of woofer and midrange measured in the tests, I compared the EV 15wk 6x13 with Volti midrange against the Crites 3x13 setup with k401/K55v dual plug midrange below. Tweeter was connected on the k401 setup, helping over 5000hz. I'll leave it to others to judge if the measured difference between 100-600hz is significant/meaningful/worthwhile. Here's the EV/Volti combination compared to the Crites 3x13 in combination with Volti/DCM50 midrange: If you have a newer Klipschorn after 1962 with the 3x13 slot, or you can't find or have blown your Stephens or EV15wk for your early 6x13 Klipschorn, here's a look at the Crites and Volti combination on either the 3x13 or 6x13 slot motorboards. When I have more time in the next few days, I will finish this post with: - Comparison between 6x13 EV 15wk/k5J setup and the 3x13 K-33e/k401 woofer & midrange setup - Comparison of motorboard thickness - 3/4", 5/8", 3/8", impact on bass bin performance
  2. Have some Klipsch horns for sale. The type of crossover is AA. They are pictured below. Looking for $3k Have some Cornwall 2's for sale. They have been refinished and had their internals upgraded. I acquired them that way. Looking for $2k. Also have a SB-2000 that has been lightly used. Looking for $400 for that. Have more pictures and willing to send all info needed over PM! Thanks!
  3. I have 2 k-400 horns that I pulled out of a really rough pair of Lascala. They do not match, apparently one is older than the other (sand cast). Obviously this doesn’t effect the sound. I would need to work on getting a proper box to ship these, but I can figure that if someone is interested. Of course they’re available for pickup in and around Chattanooga. Message me and we can discuss it. possible trade for a set of Dave's LMAHL. Thanks.
  4. Hello everyone, For those who are interested, I am unfortunately parting ways with my Dad's speakers because of their size I cannot move them with me into my new condo. Starting with the first pair which are the Klipschorns my dad purchased them from the original owner in 1984 and were made in 1977 based on the serial numbers. The Serial Number stickers are on both pairs of Klipschorns as well. The only replacement parts on the Klipschorns are a pair of Bob Crites Crossover's which I installed them back in 2016 other than that they are in original condition and in excellent working order. The second pair which are the La Scala's my dad purchased back in the early 2000's again same as the Klipschorns my dad purchased them from their original owners. Both pairs of La Scala's are in original condition and in excellent working order. The Serial Number stickers are on both pairs of La Scala's as well. I will list the info, serial numbers etc below as well as contact info for those who are interested. I am asking $5,000 for the Khorn pair & $5,000 for the LaScala pair or best offer. I currently live in CT, but for anyone interested in the tri-state area or on the east coast this is your chance. If anyone outside of the northeast area is interested, I will work with you regarding shipping. I know these loud speakers aren't for sale that often, and both pair's would be an excellent edition to your home theater setup so that you can enjoy them as much as my dad and our family have enjoyed them over the years. Thanks, Jeff P.S. Feel free to contact me via email for more info, or pictures at durkinj56@gmail.com Klipschorn: Type: KBWO Serial: 10R518, 10R519 La Scala: Type: LS-BL Serial: 8511790, 8511791
  5. Pair of Klipschorn Speakers. This pair was built in the mid-90's. Still has original horns, woofers, and crossovers (AK-3 crossover). They still sound incredible! Speakers are in great shape but do have a few minor scuffs from moving. Speakers are located in Mesquite, NV. I am willing to deliver within 100 miles. Asking $2,300 **SOLD**
  6. Lets face it: prices on heritage Klipsch speakers have gotten out of hand. I have 2 pairs that could sell for triple what I paid but I didn't buy them to make money so I will continue to enjoy them and maybe improve them instead of moving up the food chain because I cannot afford to. Its a free market so whatever someone is willing to pay dictates value.
  7. Located in Magnolia, AR. This pair of Klipschorns is for $3,500.00 These were purchased circa 1975 I believe, by my father. We live very close to Hope and were bought from factory. Picture attached below. Thanks everyone!
  8. Hi there, I need help valuing and selling these two Klipschorn speakers. Serial numbers 6M508 & 507 is what I located on the back (pictures below). I am not sure where to sell and I need an estimated value to sell these. Would appreciate any input from the experts out there! I know these are some good ones. We had four, but two were stolen unfortunately many years ago. Thanks everyone, Perrin
  9. Someone put me out of my misery here please. I’m trying to gain access to the bass bin crossover in my ak3 1992 klipschorn. I took off the input panel but that doesn’t provide enough room. i can tell that the crossover is mounted inside to the right of the input connector box. That box is connected to a 2’x2k piece of plywood. I took out all 9 screws attaching the plywood piece that the ak3 is mounted to but that piece of plywood does not seem to be coming apart from the larger side piece. It’s like it’s glued down too. Is that piece not designed to ever come off? so my next option would be to remove the entire left side of the bottom unit. I didn’t count but it has about 2 dozen screws. Before I remove all of them only to find out it too does not detach, can anyone tell me if or if not this is the way to go to gain access to the lower ak3?
  10. Besides Electro-Voice, did Klipsch license the Klipschorn bass horn design to any other manufacturers? I have had several Electro-Voice Georgian speakers over the years. As far as I can tell, the bass horn is an exact duplicate of the K-horn. I have seen a variation where the front corners of the horn are squared off making the width across the front a bit narrower and the woofer access panel is located at the front of the enclosure. Attached are two images of an enclosure I have. Generally if it were strictly an EV product it would have an EV tag stapled on the rear of the horn. There is no such tag or holes where staples would have been. It does not appear to be a kit from the quality of the construction and joinery. From the design it is most certainly a Klipsch enclosure but I believe it was not manufactured by Klipsch. All the early K-horns I have owned always have serial numbers stamped into the wood in various locations. Any suggestions as to who could have made this enclosure would be helpful and perhaps identifying some of the companies who were licensed to construct Klipsch enclosures would assist in identification.
  11. I purchased the ST-120 kit without the tubes from Bob Latino, shipping was fast and everything was very well packed and organized into neat sections. Instructions are very clear and concise. the entire kit went together in about 10 hours just like estimated. Anyone with decent soldering skills and some patience can do this kit. I enjoyed the whole assembly process, very satisfying to get to fire it up when finished and hear just how the work paid off. I was having a problem getting any kind of voltage readin from the bias pins and sent Bob a email he was able to quickly help me check some connections and voltages. He identified the issue very quickly, I had placed a connection in the wrong place. I got very lucky it didn't cause any major issues. Very good customer service though he really knows his amps! The sound of this amp is just beautiful, crips highs and nice deep lows. Now I have it connected to the pair of stock 1982 Klipschorns I recently acquired, they make quite the match made in heaven. Way more than enough power for me, I was worried I would be pushing the 60 watts per channel to the limit. Boy was I wrong, I haven't moved it much past one o'clock (half volume) for my daily listening. If I wanted to shake the paintings off the walls this amp could probably do it. I got the 21 step attenuator and it's just perfect for playing straight from a DAC without a preamp. I can't get over how this amp sounds every instrument sounds very real, like the artists are standing in the room playing in front of me. Truly a wonderful amp and experience. Someday if I decide to upgrade to the monoblocks I know I will go right back to Bob at www.tubes4hifi.com for them.
  12. New Member, I just inherited my grandfathers KHorns they ae completely original and unmolested as far as I can tell. I grew up listening to these amazing speakers and I'm looking forward to revitalizing them. My question is about the Style: JR I can't seem to find any information about them. Thanks in advance for any information, Newbie
  13. I own serial numbers 357 ( Signed by paul Klipsch 11 Aug 54; Salem, OR) & serial # 453 klipschorn. Owned them several years, both work. They do not match due to Mono then.. People bought just one.. Have set of NOS Complete set of grills go with them . Am willing to sell..Let me know if interested. Live on Mobile Bay Area in Alabama.. tried put pics, but files too large..will have to take smaller files or reduce the ones i have..
  14. https://bham.craigslist.org/ele/d/birmingham-mcintosh-klipsch-high-end/7278536530.html
  15. I currently have a pair of Cherry Khorns driven by an Audio Nirvana 300b tube amplifier designed by David Dicks of Commonsense Audio. I was apprehensive about purchasing this amp due to reading comments about the design and assembly characteristics described by a plethora of audio enthusiasts in a negative light but the common thread that was described was that their reviews were based solely on the design and components and not a physical audio experience. Every review I read by someone who had actually heard this amplifier indicated a premium audio experience and for me, that came at a cost of just under $2000. I recieved a letter from David Dicks stating that this was the last AN-300b to be sold as "New" due to their weight and his increasing age. Well, I am very pleased with the results however, I'm just getting started with my system and I'm looking to add on. Starting with a subwoofer(s) that will pair well with my Khorns. I am new to the audiophile world so I have been all over the place with ignorance and questions alike but I've been reading feverishly to try and reign in my thoughts and present "realistic" questions but I'll leave that to you to decide. First, a breakdown of my rooms and intended use. I am currently remodeling and preparing a theater room in my current house. The dimensions are 11'6"W × 15'10L × 7'10"H. I also have another house that I plan to remodel and move into in a few years where I intend to have a theater room in the basement with a much larger space and there are patio doors that can open up for out entertainment so I don't mind preparing equipment now. The Khorns sound great but I want to add to the low frequency for heart thumbing bass with music as well as theater surround as the system grows. I have seen a few recommendations but I understand enough to know that I don't know $#!@ about how this works in terms of pairing these speakers to account for delays as well as any other issues that I might be completely unaware of. I understand that the Khorns produce sound down to 20hz but it's insufficient for my taste, especially with such loud and clear highs. I also understand that these speakers are highly efficient as well as high quality and I fear that a sub-par subwoofer would take away from their performance. So I am considering either the THX-1200-SW subwoofer with the KA-1000-THX amplifier or possibly moving up to the KPT-684-SW with dual 18" drivers. If went this route I was considering a Behringer EP4000 with twice the wattage as the KA-1000-THX for a quarter the price. Here are a few questions that I have. If I purchased the THX-1200-SW and later decided to add a second one, would I also need a second amplifier? If I went with the KPT-684-SW would this present any other issues considering it's a commercial subwoofer? Another question I have is for my current stereo setup, I am using only the integrated two channel tube amplifier and is does not have an LFE output. Can I safely connect either of the above mentioned amplifiers and subs to the high output connections in conjunction with the Khorns?
  16. Hey gang. Thought I would share the custom heritage channel I made for my LaScala based home theater. This started when I refurbished a vintage pair of La Scalas (AA crossover). After some excellent two channel listening, I decided to convert that room into a theater room and went about collecting 4 Academies for surrounds. I got super lucky when a single LaScala (later model with a AK-3 Crossover) became available. The problem I had was that the third 'Scala was too tall in the center position as for comfy viewing I wanted my screen lower. After some research, consulting Mr. Crites, and enlisting the help of a friend with a woodworking shop, I scavenged the tweeter, midhorn, got the crossover Mr. Crites sells for his Cornscala design, estimated the surface area of the Cornsacala woofer and translated that to two Classic Woofers from PartsExpress, and designed a cabinet to hold everything w/ proper cabinet volume and can fit under the screen, and voila: The LaSquata The results are beyond my expectations. Wide dispersion, crystal clear clear voice tracks on movies, matching timbre and response. I am powering this with an NAD AVR and added two HSU 15" subs. It's quite epic, comparable to a commercial movie theater and the whole house shakes during LFE segments.
  17. UPDATE: These speakers are under deposit. If/When sale is complete, I will mark them "sold." I have just listed my Klipschorns on U.S. Audio Mart: https://www.usaudiomart.com/details/649648153-1976-klipsch-klipschorn-speakers-consecutive-serial-s-brand-new-type-aa-crossovers-tweeters-and-squa/ -- see that listing for details and pictures. In that listing, I offer to replace, as needed, any tweeter and/or squawker driver(s) that may be worn out (though all the drivers sound to me like they're working fine). But instead of this modest guarantee (worth no more than $210 to replace with same from CritesSpeakers.com), as a gesture of my appreciation to the members of this forum, I am instead offering a 15% discount off the top of the asking price of $2,875: that works out to $2,443.75 for Klipschorn speakers (must have already been a member of this forum as of this past Thursday, 8/20/2020). Pick up only. I live in Easthampton, Massachusetts. PM me if interested.
  18. Hi Folks, I recently considered buying a single Klipschorn, and the fine members of this forum were very helpful about what I could / could not do with my wife's Honda Fit. As a service to others, I'm starting this thread to talk about cargo space and what it takes to haul some of the larger Klipsch speakers. Inquiring minds will want to know: Size of vehicle openings - trunks, hatches, doors, etc. (width x height of narrowest part) Cargo dimensions: width x length x height, free of any obstacles such as wheel wells Which Klipsch speakers will safely fit in said vehicle Tricks for angling stuff in for maximum hauling potential Where to rent / who on this board is crazy enough to help you in your local area
  19. I recently acquired a single Klipschorn SN1703 from about 1960 with the K-5-J mid horn and K-500/5000 crossover. I know it's a long shot, but I'll looking for another single speaker like this one to make a stereo pair. Please let me lnow if you have one to sell or if you can give me advice on where I might find one.
  20. I have a set of (very not stock) K-Horns that I'd like to sell. I have a set of Heresy's that I'm converting to Claude's Super Heresy and think it's time to let their big brothers go to someone who will love them as I have. I'm hoping one of the community members here can help me understand what they are (model type, mod/abomination) and what I can do to make a proper sale. Big thanks to anyone who can help me sort this out. Pictures: Album here The cabinets aren't labelled, no sticker, and don't have binding posts built in. Does this mean they're speakerlab or maybe a custom build or is it possible that they're original k-horns? This is the most important question I have because I don't want to misrepresent something that I'm trying to sell. The crossovers are type AA The tweeters are the k-77, unmounted. The mids: Altec 511b horn, 808-8a driver Woofers: mismatched Electrovoice EV15, I replaced the other with a Crites 1526c The midhorn and drivers were replaced with an Altec Voice of the Theater combo 808-8a driver and 511b horn. Is this common? I have an extra set of k-55 mid drivers that I made some adapters for to fit on the horn. Should I probably sell with those on it instead? The grill cloth is worn out. Should I redo it before selling? Am I overthinking this? Last question: if I want them to sell in the next few months, how much should I try to get for them? I'm willing to deliver if that makes a difference.
  21. I am looking at a pair of La Scala that came out a of a local theater. They are 1974 units. One is missing one of the K77 tweeters otherwise everything is pretty much untouched. They are black plywood/ lacquer paint cabinets, have little Klipsch badges on the wood in the top corners. How difficult is it going to be for me to find one or a pair of K-77 AlNiCo tweeters from that era? Currently running HK730 with KG4s and HK430 with KG2s. Really would like to own these La Scalas as a natural progression into Kilpschland. Still debating with guy he wants $1,000 for them. Would like to grab them for around $600. Any opinions?
  22. Have a new to me set of Khorn, and looking for clarification on brochure info. 1980 version (ish). See picture, its states when placed in corner the "walls and floor" become part of the "extention". Given how room treatments effect things, and damping cabinets effect bass ect, I'm wondering if a simple sheetrock wall corner is fine, and carpet on the floor, or if these surface treatments can be altered for different performance (extension)
  23. According to the "KLIPSCH HERITAGE REFERENCE DATA - (V.3 - 23 Aug 2013)" found here on the forum: "July 29, 1955 was the last day for the four digit serials (i.e. 1811). After that the "number- letter-serial" system went into effect (2 August 1955). The first "number-letter-serial" speaker was produced on the 2nd of August 1955; that serial number was 1A812." Despite this I continue to see documented Klipschorns delivered after that date with four letter serial numbers (including my #1251 manufactured in 1957 and the subject of the last thread; #1751 delivered March 29, 1963 ) Maybe just the singles (both xx51...curious...) continued with the 4 digit serial numbers? When was the last four digit khorn built? Any thoughts?
  24. Two 1950s Khorns with different specs being sold together for $3000. Is it me or is that price pretty high? https://baltimore.craigslist.org/ele/d/vintage-klipschorn-speakers/6656096730.html No affiliation, just thought it was a curious ad and wanted to share.
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