The line was initially unveiled with the massive P-39F’s, and subsequently Klipsch followed up with its little brothers, the P-39f’s and P-37f’s. T he Klipsch Palladium line never ultimately became a speaker that would be cross-shopped with B&W or Martin Logan at the $10,000-$20,000 price point. For this reason, as fantastic as they were. The Klipsch Heresy III Special Edition speakers are an extremely limited production run of our iconic Heresy III loudspeakers, finished in a beautiful exotic real-wood California Black Walnut or East Indian Rosewood. Because of its smaller enclosure, this model offers the greatest degree of placement flexibility from our Heritage Series. Klipsch heresy Loudspeaker System Architects' and Engineers' Specifications The speaker shall be of the total type with separate but Integrally pined bass and treble horn systems of quality to conform to highest theater and home-use standards. The response shall be within peak-trough limits of 10 dB from 50 to 17,000 Hz and not more. The serial number was written on the paper serial tags and die stamped on the back edge of the top panel (inside top portion in LS). This practice was not used on later 'MDF' cabinets for Heresy's, etc. Serial numbers can often be found written in pencil on the inside of some of the Heritage series, most notably Klipschorn's and Belle's.
Check your Apple warranty status. Enter your serial number and we'll look up the date of manufacture using our lightning fast engine. It. The serial number is printed on a sticker located on the back of the neck, close to where the neck attaches to the body. Serial Number lookup Sign in to follow this . If multiple models appear for your serial number simply match the date with the appropriate model, as certain vintage firearms can share serial numbers between different models. Maximize convenience. Ibanez Bass Serial Number Lookup. Also see Headstock Styles and Logo Styles for help determining when your guitar was made (particularly helpful if there is no serial number). 1994-2002 Mandolins are custom order only. Most important, it helps the manufacturer keep track of each and every single watch they produce. See. Please note that specific information may not be available, especially on older models. Serial Number Lookup* Seal Kit Identifier* Competitor Interchange Tool* 2H/3H Legacy to Gen II Converter* Cylinder Quoting Tool. Information … By davidmac, September 14, 2003 in General Klipsch Info. The Cort serial numbers AFTER Hoshino kicked Samick out followed the Samick numbering ... Cort Guitars (Cor-Tek Corporation) is a guitar manufacturer centered in South Korea.. Cort Guitar Dates? Z512345. Solved: Is there a way to look up a serial number or assembly number and have it can tell me the date that it was manufactured or even maybe even purchased? In 2002 the first character of the serial number is 2, in 2003, 3 and so on. Find Parts Get information about replacement parts to repair or maintain your Generac product. Remember thousands of Veterans join VetFriends each month, every day is a new opportunity to find your service buddies. ISMACS Singer Serial Number lookup. Serial Number lookup. Rolex serial numbers location; FIND THE MODEL NUMBER ON YOUR ROLEX WATCH. 360° LED ROOF LIGHT add more light instantly Buy Now. Want to search the entire site in natural language? If you are looking for specific equipment you would like to add, please send us email. Thank you for your interest in our Part Lookup … Note #2: Guitars with no serial number were produced at many different times. Parker … Swiss Schmidt-Rubin rifles do not have the date of manufacture stamped on any of the rifle parts, so determining when the rifle (and mismatched parts, if any) … Use Site Search instead. In reality, you can get an idea of the type of Washburn from its model number if you know the basics of how the numbers are arranged. Accessory CAD Locator. Completely free Apple serial number lookup and IMEI checker. Itʼs one of the following models: Itʼs this model: MPN. Find the serial number in Settings on Surface Duo. Scroll … Techable want to provide a better way to research Apple … Please note that fender serial numbers tend to overlap by at least a year, and thereby the date of your guitar can only be approximated. Samick branded models did not start using serials until around 1987. Leer Caps Serial Number Lookup ->->->-> DOWNLOAD If a used Leer or SnugTop shell has a serial number, you can call the ... but it changed only slightly, check the top of the rear corners of a new F150 bed ... and how it 'hooks' in the rear corners to cover up the F250 bed caps.. Need in-person help? Because the number was placed on a sticker it is fairly common for the serial number to be missing. In 2002 they started their serial numbers with the year it was built. Enter the serial number, without spaces or dashes, to search the database. Our Apple serial number lookup tool with full Apple database has been refined to show users a true market value and give users full technical specs of their Macbook, iPhone, iPad, iMac, Mac Mini, and other Apple devices. Product Support Lookup Look up information about your specific product with the model or serial number. consists of a letter, A - L, followed by a 6 digit number. Also, the … I am trying to do with with 3750gs, 4506, 3550, and some line cards. Before 1. Shop for Accessories Enhance performance. Four AC 45 s consecutive serial numbers … Find the Serial Number On the PC’s Hardware, Box, or Elsewhere. If you don’t see a serial number after running the wmic command—or if you just can’t turn the PC on or don’t have access to it—there are several other places you might find the serial number: If you have a laptop, flip it over. Creating great products for HVAC/R technicians while continuously striving to improve the AC/R industry through innovation and education. Serial numbers … Remember thousands of Veterans join VetFriends … Serial numbers may correspond to the manufacturing date of your instrument. Use our Macbook Pro serial number lookup to find specs for your Mac and learn it's market value. The model or reference number is located on the side of the watch case at the 12 o'clock position. In the form below, select your brand and enter your serial number. Bobcat owners who buy Bobcat parts have top performing machines. O Series 1st variation serial number range 01 rarest military P38 -- serial number 7689. If your serial number does not return a result, please call Customer Service at Some more recent Squiers, including the Vintage Modified series (serial numbers starting with SH), were introduced in 2007. But at the same time, the recorded databases of the serial numbers are rarely shared with the public, but used and kept by the company alone. records at the factory indicate '111e following serial numbers were assigned … Enter a serial number to review your eligibility for support and extended coverage. Followers 0. Clear a path with Sweeper and Broom Parts Shop Bristles. This page is all about Cort Guitar production dates and general Cort Guitar and Cort Bass Guitar information. But, if you have an old Oscar Schmidt, serial number lookup is quite a challenge, which is why this article is made. Schrade Knives began in 1904 as the Schrade Cutlery Company. Pricing / Discount Schedules* Training* Who To Contact* Announcements* MyParker Claims* (Formerly Return Goods Authorization) *Myparker or PHconnect login is required. Heavy Equipment Serial Number Lookup. Enter Serial Number eg. Enter Mac or Apple Device Identifier: Keywords=DMPKJTW7F182 Please perform the following task to retrieve your personalized … The Taurus Model Number Lookup System will help you find detailed information about your Taurus Gun. Oscar Schmidt Lookup Series Your Guitar. Enter your serial number to see compatible products: View products. Serial numbers and manufacturing dates. Most just bore a neck plate simply marked. As with the serial number, the bracelet must be detached from the 12 o'clock side of the case to be able to check the serial number. Don't settle for knock-off parts! I bought a pair of used Heresy's recently and I would like to know how old they are. Starting with K31 serial number 868,901, beech wood rather than walnut wood was used for making the stocks. Ibanez guitars have used serial numbers since the mid 1970s. S.P.A Request / Special CAD Requests. For instructions on removing the bracelet, watch the video above or … Here you can look up your serial number and find out when your Singer Sewing Machine was made as well as identify what model you have. 97. We are constantly updating serial number database. your bobcat dealership is around the corner Dealer Locator. Snow? The first letter of the trane serial number lookup gives the year of manufacture and the next two numbers are the week . Note: This service is provided as reference only, and accuracy is not guaranteed. On your Home screen, tap Settings. Consider Generac accessories to help you get the most out of your Generac product. See Mac Identification or iPod, iPhone & iPad Identification. Find out the year of production for your piano with the help of the serial number. If you like to contribute to serial number list please submit info below. For a Serial Number lookup, be sure to enter the entire serial number. This will tell you what series your guitar is in, and is the most important piece of information in the model number. Source: Manufacture Dates of Swiss Schmidt-Rubin Rifles. Reply to this topic; Start new topic ; Recommended Posts. This means that if you own a century-old guitar, you can appraise it better when you know its serial number. Find specifications, images, warranty, and hidden info. * 1991 C. F. Martin & Co. begins using one set of serial numbers for guitars & mandolins. 5 Ibanez did not put. Serial numbers were stamped on the back vibrato cover plate on early ’50s Stratocaster® … This also includes Seiko. Enter Serial Number : Serial Numbers begin with two or three letters and a dash; i.e. Specification. Ibanez serial numbers are unique identifiers placed on instruments sold under the Ibanez brand. GPS-00111 … seiual number 3,500,000 was not constructed until 1979 and was sold at auction in las vegas, nevada. This device has these capabilities. Guitar Dater Search » 2002 Mandolin production ends. Try a serial from an iPhone, iPad, iPod Touch, Apple TV, Watch, HomePod, or try an IMEI. In Settings, tap About > Model & hardware, and look for your Serial number. If you have an immediate request, please contact our applications department at pdnapps@parker.com. The Fender serial number decoder currently supports all documented MIA, MIJ, MIM, MIK and MII formats with the exception of Custom Shop, Relic and Reissue instruments. Reincubate Lookup Apple serial lookup & IMEI checker. This is the quickest way to find your serial number. 1976 Serial numbers 259996-260020 were also used. Present, This old style serial number. Getting started - Guitar Dater, Decoder and Serial Number Search Lookup Tool . serial number 2,000,000 was presented to president dwigiit eisenhower in 1953. serial numbers 2,500,000 and 3,000,000 were presented to too winchester gun museum, now located m cody, wyoming. Serial numbers are also helpful in determining an instrument’s production year. davidmac 0 davidmac 0 Newbie; New Members; 0 4 posts; Posted September 14, 2003. Enter the serial number (no spaces) of your firearm and click on 'Search' to identify your model. Look up. Search. Serial Number Lookup Enter your Ruger® serial number above to view its model number, product line, caliber, production status, ship date and instruction manual. P 38 serial number search, p38 serial number lookup, p38 serial numbers, p38 walther serial numbers, post war walther p38 serial numbers, walther p-38 serial numbers, walther p38 date of manufacture, walther p38 serial number, walther p38 serial number history. leer cap serial number lookup. 9 . Why serial numbers? Note: Any guitar with a serial number with the prefix 'SI' is Indonesian-made. Currently, we are working on getting our guitar dater lookup and search tool fleshed out. The only way to date these guitars is to find out what years they were. Need help? However, if your Surface Duo doesn’t turn on, you can also find the serial number on the SIM card tray after you eject it. If your firearm does not appear in the listing, please understand that this is not a comprehensive database. The … the Factories heading a few paragraphs down for little info on guitars produced. The serial number has a number of different purposes. The first serial numbers on Ibanez acoustic guitars appeared in October 1974 Serial numbers on solid body guitars came a bit later with the first appearing on the neck plate of bolt-on neck models around August 1975. Japan. For years, serial numbers have been used in various locations on Fender instruments, such as the top of the neck plate, the front or back of the headstock and the back of the neck near the junction with the body. Or, if your valuable guitar is stolen, you can track it down … Any help would be Simplify maintenance. Dates the person was in the military, Birthdate, or Service number; Location where the person was born, entered the military, and left the military; Did the person serve a few years or retire from the military? For 116 years we've provided innovative Knives, Multi-Tools, Cutting Tools, and Equipment.
Formula Of A Hydrated Salt Lab Report,Should I Use A Sealant On Intake Manifold Gaskets,Does Raynaud's Cause Fatigue,Lucas Magneto Not Sparking,Skidmore Interview Reddit,Aldi Friendly Farms Whole Milk Greek Yogurt,Rv Cushion Covers Suppliers,Smith And Wollensky Miami Spice Menu 2020,
octubre 16, 2020
This is a speaker build log with the intent of sharing information as well as acknowledging with respect, the fine work done by the late Paul Wilbur Klipsch.(March 9, 1904 – May 5, 2002) Paul was active in the company affairs up to age 96. He was 98 when he passed away. This is a favourite photo of Paul standing in front of a shed he rented in Hope Arkansas to begin hand building horn loaded speakers circa 1946. It is interesting that his first model, the Klipschorn is still in production today after more than 60 years.
(they are the big ones in the corner below) He was also famous for his yellow 'Bullshit' button that he would wear under his lapel. While at trade shows when people tried to suggest some new whiz-band design that went against solid engineering principles he would display the button. He would also pass out the buttons. A great American engineer that started from humble beginnings who created a huge international company by building well designed, high quality speakers.
Find great deals on eBay for klipsch serial numbers. Shop with confidence.
This photo shows the relative size of some of the Klipsch Heritage line. From left to right Klipschorn with a Heresy on top, then La Scala and then a pair of Cornwall in the middle. The idea of this build is to attempt to combine the favourable bass characteristics of the design of the Cornwall in the middle with the La Scala that flank them. Some Background on this Speaker Project After owning and enjoying a pair of La Scala for about 20 years and then selling them due to lack of space came the realization that the joy of listening to 2 channel stereo music was lacking. About 6 months ago I found an old pair of early 80's Heresy that needed some tlc.
After a refinish and replacing the capacitors they were back in action along with the understanding of how nice it was to enjoy the clear, accurate, forward sounding horns. In sourcing out the new capacitors from and his son Michael, I discovered one of his projects called the CornScala. The CornScala combines the fine bass characteristics of the Klipsch Cornwall with the dynamic clear midrange characteristics of the La Scala. You can read about the evolution of this project on his site. What a great idea and in short order realized this was the speaker build direction to follow. The decision was made to use drivers/crossovers of the latest CornScala version C but make the speaker a fair bit narrower, higher and deeper to fit my space.
Cabinet external dimensions are 19 1/2 ' wide x 37 1/2' high x 18' deep. Drivers and Major Parts list The tweeters are the Selenium D220Ti 8ohm version The horns for the tweeters are the Selenium HM17-25 The midrange drivers are the Selenium D405 The midrange horns are the Selenium HM4750 The woofers are the cast 15' CW1526C The crossovers are the CSSS 500/5000 are made by the folks at Crites speakers 3 sheets 5x5 13ply marine grade Baltic birch for cabinets ***ballpark total cost, shipping, taxes, odds and ends but excluding rosewood veneer about $1,500 for the pair. Here is a photo showing the layout of the drivers on the motor board. To determine the port size based on the Cornwall as a guide took the most time. The port defines a column of air that acts as a spring relative to the action of the woofer. There are a number of sites out there that have port length calculators. This was not quite as straight forward as I thought.
The port shelf ended up as 3 5/8 ' high x 18' wide x 9 1/2' deep. Here is a photo of the clamp-up step.
The plan was to use only glue and hardwood dowels to avoid any potential for vibration. These Selenium horns are not flush to the front so the decision was made to not bother building speaker grills. To give the woofer some protection a starfish design was cut into the motor board.
Maybe this makes them the CornScala C - Starfish:) This is the A very highly engineered product that allows for very accurate dowel placement. More great North American engineering technology but in this case Canadian. It worked like a charm and made for really strong joints. Used the Lee Valley Cabinetmaker's Glue 2002 GF mainly for the long tack time because you don't want the glue going off while you are fitting the clamps.
Showing the back brace right behind the woofer on the inside of the back panels. The speaker terminals will be recessed into this brace so they are well protected, especially when moving the speakers. The speaker binding posts are from Parts Express at about $8.00 a pair and great quality. Would use these again for sure. Clamping up the base. Again not using any screws only hardwood dowel and glue and clamping.
Probably would not scallop the base as much another time. This is the crossover and it has 500Hz and 5000Hz crossover points. They were made and tested by Michael Crites. They are well made units with high quality components.
Rather than use the self stick pads a couple holes and screws will attach them to the cabinets. Found a number of suggestions that a center brace to the middle of the back panel is a good way to reduce resonance. The rosewood veneer was sourced from This company came highly recommended on the Klipsch DIY forum and they provided a nice product. The edge 1 - 2 inches had some damage in shipping. The veneer was applied uing the iron-on method and Better Bond Heat-Lock glue sourced from This is a great system and IMO much better than using contact cement. Happy to provide details on request. Here is a finished carcass ready for the internal batting material and drivers etc.
I was not all that happy with the Tung Oil used. Might try a Penofin product next time. Autodesk Inventor 2014 Sp2 X64 Download.
Found some nice brass wood screws to mount the horns at Lee Valley. The rubber feet were sourced from Parts Express. Good dense rubber but they smelled like a car tire for a few weeks, but nice and thick and tough. This is the batting material used. It is a polyester upholstery stuffing material. It is much denser than polyester batting used to make quilts and the like.
A double layer was used as recommend on a couple DIY sites. A couple yards did the trick. Everything in place and ready to button up.
Done Front View Side/Top View Placed and hooked up. The plan is to use the new CornScala for 2 channel stereo and continue with the Boston Acoustics as the HT setup. I have tried using La Scala years ago as the fronts in a HT setup with disappointment. I could never get the volume balanced the way I wanted.
IMO a set of speakers for each purpose is best. It has been a couple weeks and the woofers should be somewhat broken in by now.
These speakers sound amazing! Better than expected by a long shot. I have read about how horns do well when matched with small tube amps, so purchased a to try from. I have found they do sound more musical using this small amp connected to the pre-outs of the Denon 3310. The bass response is great, nice and low, very tight and not boomy at all, the midrange is super crisp and clear, the tweeter matches well without being harsh. They do very well at low volume as well as handle high volume with ease.
It does not take much power to get them breathing. But they are not forgiving at all. Feed them a poorly produced source and every flaw is revealed. Here are the results of the Audyssey auto EQ calculation on the Denon 3310.
Nothing surprising really. Similar results for both speakers with nothing drastic going on at the crossover points of 500Hz and 5000Hz.
Conclusion Great fun and results from building these CornScala speakers. Before you build these, it is best you are familiar with the horn speaker sound. Find a used pair of Heresy or another model in the Heritage line and you will get an idea of their basic characteristics. They are up front sounding and may not be for everyone. The amp you use is important. But they sure wash the entire listening area with crystal clear full-range non-fatiguing sound. IMHO you will be very hard pressed to find another speaker that could come remotely close to sounding this good at many times the parts price of $1,500.
Believe people when they say 'fewer better speakers is best'. (for music anyway) The CornScala are a fairly straight forward speaker project to build with lots of information available online. In this case they were built in a second bedroom of a condo over a 3 month period. Build a pair, you won't regret it!
Update to Crossover Networks (May 25, 2011) Have decided to upgrade the crossover networks to a set of AP12-500 and ES5800 from. Al has done alot of work improving the crossover designs. There is an interesting read on his site regarding xtreme slope crossovers. ETA is probably a couple months. Say Fall 2011 before I can comment on results. Getting parts has been a challenge and Al builds them himself. Update to Crossover Networks (July 17, 2011) The extreme slope crossover networks arrived yesterday in good shape.
Construction is excellent and Al did a great job. Interestingly, he gets many parts from a fine Canadian company from Quebec.
This makes paying duty charges more annoying. They are a modular design such that the AP12-500 (top in photo) will accomodate a 2 way configuration, then with the addition of the ES5800 (bottom in photo) via the cable, will crossover the squawker and accomodate a 3 way configuration. These will be going in shortly and update to follow. Have both the AP12-500 (bottom) and ES5800 (top) installed in both cabinets now. Tried to keep them away from the speaker magnets as far as possible.
I left the woofer taps at x-4 and the tweeter attenuation selector at 0 for the loudest. I tried a couple other setting on the tweeter but even at 0 the tweeter sounds less pronounced than the BEC networks, so this seems the best tweeter setting for now. Initial comments are that these new networks are a definite improvement. Best described at this point as a cleaner more pure sound. Updated comments to follow in a couple weeks. Many thanks to all involved.
Especially - The late Paul Klipsch, Bob Crites and co, Al Klappenberger and the Klipsch Forum folks and the many DIY sites.
Do you mean the CF4? Dual twelve inch woofers single mid/hi horn D'Apolito configuration. If you want a surprise then raise them up so that the centre of the horn is at your seated ear level.
These speakers though rated at 102 db efficient are not really as efficient as stated and they do respond to lots of good clean solid power they shine with 150 - 250 watts a side. I have some CF3 which used dual tens and the same horn and driver. There is lots of modification work that you can do with these to extract even more performance.
Enjoy your new Klipsch one of the finest designs by Roy Delgado and Klipsch period. Best regards Moray James. First off is the cabinet you should brace and stiffen it making sure to tie the cabinet together with 1x2 inch stringers. You can also re damp the cabinet internally. The drivers respond very well to damping I like to use dynamat and F-11 acoustical felt so too do the compression drivers. Further there are ti diaphragms available and then there are the crossovers for the faint of heart new caps are a very good start.
These speakers will sound much better if you raise them up so that the centre of the horn is at your seated ear level. How long are your vent tubes by the way? Hope this is of interest. Best regards Moray James. Two way Vs three way kind of apples and oranges. The did not build the Epic series for very long about three years. Depending upon where you are the tend to pop up every 3-4 months or so.
I prefer the woofer in the KLF20 over those EV neo units in the CF3 but that's just me. The two ways will integrate over a shorter physical distance than a three way will so in most homes a two way has the advantage. The fact that the horn is so large and the crossover is so low put the CF3/4 way ahead of any of the RF series in my book. Have you considered diy? Just a thought. Hope this helps.
Best regards Moray James. PS: I have both KLF20 and CF3. Not sure if I should post here or start a new thread. I bought some CF-3s and was wondering if you guys have done any mods to yours? I appear to have the series 1, the ports measure 5.25'. What's immediately noticeable over my KLF-20s is that the woofers on the CF-3 have a much stiffer suspension.
The first thing I immediately did was plug one of my ports, it dropped the tuning significantly and gave them better extension with music. I did some loud listening yesterday and I noticed harshness from the horn. One thing I quickly noticed when I bought them was that, upon tapping the horn with my fingernail, it feels really quite cheap and thin. I'm going to apply some damping material to the horn to try to correct any possible resonances - which could be what made them sound so harsh. I've also noticed this from the mid horn on my KLF-20s but they're smaller and probably more rigid.
I'm thinking Dynamat would do a pretty good job damping the horn but perhaps there's something out there equally easy that costs a lot less? It's amazing what kind of deals you can find on Craigslist. Picture(s) related. That's right Bill. Seems that the hard core customers and dealers did not care for the Epic as it neither looked or sounded like the Heritage series Klipsch loudspeakers. Sad part of all this was that marketing told engineering what to do and the Epic went away.
I think the Epic CF3 and CF4 are probably the best Klipsch ever designed. Only the large Heritage better them in efficiency. The best was lost.
Later the company came out with much taller HT format two ways but the horns had been shrunk and the crossover points increased by three. Gone too was the D'Apolito driver configuration with a return to the KG format or WWT towers. If others have more info I would like to hear about it. Thanks and best regards Moray James. That's right Bill. Seems that the hard core customers and dealers did not care for the Epic as it neither looked or sounded like the Heritage series Klipsch loudspeakers.
Sad part of all this was that marketing told engineering what to do and the Epic went away. I think the Epic CF3 and CF4 are probably the best Klipsch ever designed. Only the large Heritage better them in efficiency. The best was lost. Later the company came out with much taller HT format two ways but the horns had been shrunk and the crossover points increased by three. Gone too was the D'Apolito driver configuration with a return to the KG format or WWT towers. If others have more info I would like to hear about it.
Thanks and best regards Moray James. The info below was posted by a Klipsch forum member? EPIC Series Production versions – Rev.1, Rev.2, Rev.3 Rev.1 – Start of Production in Spring of 1994 These models had 5' long port tubes Networks used OFC (monster cable looking) clear jacket wiring. Horns in these models were gray in color. Rev.2 – Fall of 1994 These models had shorter 2.5' long port tubes (to raise the box tuning) Networks had a component / value change to correct for the new ports. (The network wire was still the OFC used in Rev.1.) Rev.3 – Summer of 1995 to end of production in 1996 These models had new lighter cone woofers (new vendor) (these cones aren’t nearly as stiff as the originals and can be deformed much easier by pressing on them) Networks were changed to compensate for the new woofers Change in network wiring to colored 16ga. Like what is used in Legend KLF networks New horn material that was 20% glass and was painted black.
Serial number decoding for EPIC Series models (or any Klipsch model made from 1990-1997(?)) Production Years Description Example 1990-1997(?) DOY Y2Y1 # # # # (135791234). Not sure if I should post here or start a new thread. I bought some CF-3s and was wondering if you guys have done any mods to yours? I appear to have the series 1, the ports measure 5.25'. What's immediately noticeable over my KLF-20s is that the woofers on the CF-3 have a much stiffer suspension. The first thing I immediately did was plug one of my ports, it dropped the tuning significantly and gave them better extension with music.
I did some loud listening yesterday and I noticed harshness from the horn. One thing I quickly noticed when I bought them was that, upon tapping the horn with my fingernail, it feels really quite cheap and thin. I'm going to apply some damping material to the horn to try to correct any possible resonances - which could be what made them sound so harsh.
I've also noticed this from the mid horn on my KLF-20s but they're smaller and probably more rigid. I'm thinking Dynamat would do a pretty good job damping the horn but perhaps there's something out there equally easy that costs a lot less? You are right about the thinness of the horn walls and I have felt them flexing under hard drive (due to cabinet pressures). I stiffened my horns up with half round cut length of plumbing pipe and some adhesive. You could also use hard wood struts and adhesive. Then I damped the rest of the back side with Dynamat. The compression drivers also respond very well to damping mechanical and acoustical using Dynamat and S.A.E.
Rated F-11 acoustical felt. I hope this is of interest.
Best regards Moray James. I know I am way late to this thread.
Anyone use the cf-4's with class A tube? No one that I've heard of. That's because tubes are relatively low power. The guys who have the La Scalas, K-horns, Chorus, other speakers in what is referred to as the Heritage line like the tube amps.
The CF-4 is different from the Heritage line in that it likes power, so higher power SS amps are the norm, at least 100 wpc. The CF-4 has a HF that overpowers the LF, so the secret is to bi-amp and run an amp to the woofers you can control so more power goes to the LF. A 200 watt amp to the woofers would be outstanding. Also, To tell the version, are you talking about how far the ports extend into the box or the diameter? [/QUOTE The width of the port is 3' when viewed from the outside.
If you place a ruler inside it should reach 5 1/2 inches. The ports are loosely pressed into the cab so they can be easily removed and re-inserted. +++ The CF-4's were produced for three years, 1994-95-96. A version 1 was produced in 1994 which you can tell by the serial number. DOY Y2Y1 #### (135791234) DOY= day of the year Y2Y1=2nd digit of year, 1st digit of year My CF-4 has a s/n 251499125, so it was born in the 251st day in '94.
+++ NOTE: The picture below shows the two pieces of 3/4' foam through the woofer opening which is stock. I placed a small amount of Polyfil (white in color) near the ports in the bottom.
The Polyfil lowers the pitch slightly giving the speaker a more accurate sound and removes the slight harshness in the HF region.