Kef b139 sp1044. 00. KEF B139 SP1044 MATCHED PAIR BASS DRIVERS !!!LOOK!!! Photo #601526 - UK Audio Mart See the Member Gallery Click here for more information Find many great new & used options and get the best deals for KEF B139 SP1044 BASS DRIVER Used at the best online prices at eBay! Free shipping for many products! PicClick Insights - Vintage KEF speaker B139 - SP1044 PicClick Exclusive Popularity - 5 watchers, 0. 97 Sd 349 sq cm Xmax 6mm pk-pk (B=7p-p) X (limit) 12mm pk-pk Moving Mass 43. Tested and Working from matching speakers. The spider has detached from the voice coil former (i. 5 Floorstanding Loudspeakers By Nic H Started September 15 Classifieds (Hardware) Classifieds (Media) Videos All Activity Home OTHER FORUMS StereoNET News & Announcements Classifieds Archive Australia & New Zealand Hi-Fi and Cinema Cables & Accessories KEF B139 DATA SHEET KEF Specification Number SP1044 Low frequency unit with foil-stressed expanded plastic diaphragm and highly compliant surround, suitable for totally enclosed box, reflex, transmission line, horn and other specialised low frequency 300 200 Total mechanical resistance of suspension, RMS: 1. The following table shows likely candidates for the original B139 fitted to the Isobarik based on age and specification. Especificaciones técnicas del subwoofer de KEF B139 SP1044 12 pulgadas. Plans Jan 24, 2006 · I've read all about the DIY KEF transmission line 'coffin' subwoofer, but I think that's a bit advanced for my capabilities at the moment . The Falcon B139 is designed to be a genuine and exact replacement for KEF B139 SP1044 applications. The easy solution would be to apply new glue over top of the old glue. Vintage KEF SP1044 B139 Driver - 8 Ohm Woofer Speaker TESTED AND WORKING!! #9 Find many great new & used options and get the best deals for KEF B139 SP1044 BASS DRIVERS at the best online prices at eBay! Free shipping for many products! Kef B139 - SP1044 8 ohm - Firm price for nearly unobtainable speakers. The spider is still in great shape so I don't really want to replace it. The B2875 is a date and production code, 28th week of 1975. 1mWb R (E) 7. The way I see it, I have 3 options: 1 We strip many pairs of quality old British enclosures so we usually have a good supply of these classic KEF ABR’s. Nov 28, 2023 · B139 was used as the basis for most of the early TL experiments so a good choice for the above recommendations. I am sure someone in diy audio has them. I've always been happy with the sound reproduction so have not considered replacing/upgrading till now. 4 Ohm -Excellent condition FWO - £190. systems. Parâmetros Thiele-Small, detalhes do produto e uma extensa galeria de fotos. Oct 28, 2025 · Used KEF SP1044 Loudspeakers for sale on 400+ second hand hifi sites & shops. Hopefully the B 139 are sp1044. 99 Jun 2, 2019 · Hello, I Have a pair of Cambridge Audio TL100 speakers that5 recently began completely renovating . Free Postage & Packaging with the UK Sep 15, 2011 · The B139 is a very good driver used properly, as in the IMF transmission line designs, for instance. Use Hifi Shark to monitor pricing and global availability Dec 24, 2014 · Hi, I have a pair of KefKit3 (KEF Concerto) speakers, they gave performed faultlessy for me for over 30 years. You could use your original Celeste II xovers but replace all the Non Polarized Electrolytics. Flat woofer unit made of composite material. 04mH L (e) 0. e. The HF units are TBA. Thiele-Small parameters, performance data, and in-depth user and expert reviews. Dec 1, 2012 · These KEF units were OK in their day, but there are much better units available today. If you like the punchy bass of a bass reflex design, you will like the Martin King approach too. A design by P. Crossover would depend on the mid unit, but probably ~400Hz. Especificações técnicas do subwoofer KEF B139 SP1044 12-polegadas. Are they anywhere near SP1044? I have T-line enclosures which were built for SP1044 (Hifi answers Cambridge audio R50) but they lack original woofer. B Constructor Series. Parâmetros Thiele-Small, dados de desempenho e opções de projeto de caixa. One driver has a very small mark, see photo. That's pretty far from the specified 25Hz. 54 FALCON B139 B110 T27 SET (PAIR) for KEF CONCERTO/KEFKIT 3 & CAMBRIDGE R40 - 5% SET DISCOUNT £788. Just used for 11 month very nice cosmetical condition. KEF B139 SP6171 to KEF B139 SP1044 REPLACEMENT ADAPTOR RING. 9Ohms and 8ohms. And I recently bought a replacement KEF B139 SP1044 Nov 5, 2006 · KEF B139 SP1044 cutout dimensions (based on KEF drawing) 05-september-2023 | dld 2006-23 planet_10 enterprises limited free use Technical specifications KEF B139 SP1044 12-inch subwoofer driver. Technical specifications KEF B139 SP1044 12-inch subwoofer driver. Diameter 12 inches, Power 0 W. We only offer in excellent condition, fully tested and in 100% working order. 2 R (e) 4. Atkinson published in HiFi News & Record Review April 1976 using a Kef B139, a Kef B110, 2 Coles 3000, a Kef T27, and a Coles 4001K. 2 Speakers. 8 – is this reasonable? What other drivers may be appropriate? Oct 1, 2013 · Hi guys, Just measured two KEF B139 SP1044 I had found in the basement: Looks like fs is 43Hz. Dec 20, 2007 · I could get these woofers for a fair price but I don't have their T/S data. the cylinder thingy underneath the dust cap). 37 May 8, 2014 · Recall the actual B139 Konstruktor specs from KEF themselves were slightly different than the standard B139 - both same year SP1044. Nov 27, 2008 · Anyway I kept the 2x KEF B139's (good working cond ), The 2x Peerless K040 MRF 8 ohm (1 has tear in edging )and the 2x Peerless 100DT 25mm tweeters ( both fine). In good working condition. In absolutely mint condition. The planned bandwith is 110 Hz to 880 Hz with external active crossovers and tri-amping Quad 405's. Brand new in Kef boxes with seals and mounting hardware. SP1044, 8 Ohm. I'm not sure what its nominal frequency response is but I'm sure its better than the later models where they started to decrease the weight. Parâmetros Thiele-Small, dados de desempenho e análises detalhadas de usuários e especialistas. Oct 24, 2016 · Kef b139 SP1044 repair The screwdriver is pointing to where the glue has deteriorated. 43 mech ohm C (MS) 7. Sep 1, 2008 · The existing driver is a KEF B139 SP6171, which is the older version, KEF’s declared Fs was 20Hz with freq range 20-1000. The correct tuning is the original KEF Concerto. KEF B139 SP1044 MATCHED PAIR BASS DRIVERS !!!LOOK!!! Photo Previous | Next KEF B139 SP1044 MATCHED PAIR BASS DRIVERS !!!LOOK!!! Photo Previous | Next The KEF B139 SP1044 Bass Driver is used 2. The unit has increased power handling using a 25mm deeper chassis than the original KEF B139 SP1044 version. Purchased from Goodman's in Falcon B110 Drive Unit, direct KEF B110 replacement, designed by Malcolm Jones ( the original KEF B110 designer), hand built in the UK. I built some huge transmission line speakers using the KEF B139, B110, coupled with Celestion HF1300 and Coles 4001G, and it sounded pretty decent in the 70's and 80's, but not by today's standards. It looks like SP1044 from a Kef Brochure The KEF B139 was used in many commercial speakers and in many kits. 30 £945. An unusual speaker, as the cone isn't a cone! It's sort of conical, but solid polystyrene. Thiele-Small parameters: frequency of self resonance Fs=25 Hz, equivalent compliance volume Vas=127 l A pair of B139-B SP1044 Kef racetrack woofers, the previous owner painted the center which does not affect the sound. Model B139 Specification Number SP1044 Low frequency unit with foil-stressed expanded plastic diaphragm and highly compliant surround, suitable for totally enclosed box, reflex, transmission line, horn and other specialised low frequency applications. £33 (GBP) Click here for more information on this item from Retrotech Audio Payment accepted via PayPal, Bank Transfer, Personal Cheque or cash on collection. 5 / 6. Wilmslow Audio has suggested the Volt 250. More The KEF B139 SP1044 Bass Driver is used 2. Unfortunately, none of the documents are dated. 94 FALCON B139 8 ohm KEF B139 SP1044 REPLACEMENT WOOFER £197. Obviously, there's something wrong. zero feedback ebay members have to contact Oct 3, 2022 · 0 KEF Q350 Bookshelf Loudspeakers By Minitransit Started September 7 0 KEF 104. B / SP1044 Low Frequency (Bass) Speaker Driver - For Sale This is also listed on Ebay Please ask me for postage quotes outside of the UK. 96 Mar 18, 2025 · Find many great new & used options and get the best deals for Vintage KEF speaker B139 - SP1044 at the best online prices at eBay! Free shipping for many products! Legendary woofers by Kef. 5% positive Jun 5, 2015 · Bud Fried started with KEF drivers when he started his business, but at the end, used all customer made drivers for his system. The diaphragm is made of aluminum-coated polystyrene resin, and resonance is suppressed by a special deadening process. I know they are only B139 model which had 4ohm voice coil. I don't £224. However since it's not open, does that mean this is repairable? If anyone has Oct 28, 2025 · Used KEF B139 sp Loudspeakers for sale on 400+ second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability Dec 26, 2015 · Also, there are slight variations in the KEF drivers according to the SP (specification) number. Since i has no other option ,i cant find them new or used , i A design by P. Parámetros Thiele-Small, datos de rendimiento y reseñas detalladas de usuarios y expertos. Upon inspection of the KEF Drives (T27-B110-B139) i saw that the B139 woofers had cracks on the surrounding racetrack rubber . FOR SALE! Vintage Pair of Kef SP1044 Woofers - 1976 (see date stamps). 5N?A F (s) 25 Hz +/- 5Hz Qm 6 Qe 0. Removing the old glue from the spider and former will be a difficult and tedious task. The history and link between KEF and Falcon Acoustics are documented on Used in many KEF, IMF etc. KEF B139. Use Hifi Shark to monitor pricing and global availability Sep 15, 2011 · kef B139 Which sp# do you have? The t/s parameters are available from old KEF spec sheets. 3 x 10-4 m/N (9. Parâmetros Thiele-Small, curvas medidas de resposta em frequência e percepções sobre o desempenho acústico. Is it time to let them go? Jan 11, 2006 · B139 SP1044 (B version seems to have very sililar parameters) From KEF spec sheet Nom Impedance 8 ohms Freq range 25-500Hz Sensitiviy 87db Total flux 1. A low frequency unit with foil-stressed expanded plastic diaphragm and highly compliant surround, suitable for totally enclosed box, reflex, transmission line, horn and other specialised low frequency applications. But the classic box for it is a large ported cabinet. FALCON B139 8 ohm KEF B139 SP1044 - NOS REPLACEMENT WOOFER (2) | Sound & Vision, Home Audio & HiFi Separates, Speakers & Subwoofers | eBay! Especificações técnicas do subwoofer KEF B139 SP1044 12-polegadas. SP1044 from a Kef Brochure The KEF B139 was used in many commercial speakers and in many kits. More Oct 24, 2016 · Kef b139 SP1044 repair The screwdriver is pointing to where the glue has deteriorated. Jan 19, 2025 · Kef B139 bass driver SP1044 NOT WORKING Spares or repair 8 Ohm with data sheet / Als Ersatzteil / Defekt / nicht verkauft, Radford Vintage Lautsprecher Paar mit A pair of KEF B139 SP1044 bass drivers. Nominal impedance: 8 ohms. Don't remember where. 00 for the pair. 1 sold, 0 available. Find many great new & used options and get the best deals for Kef B139 sp1044 Woofer IMF kefkit Cantata Concerto at the best online prices at eBay! Free shipping for many products! Sep 1, 2008 · The existing driver is a KEF B139 SP6171, which is the older version, KEF’s declared Fs was 20Hz with freq range 20-1000. Oct 23, 2016 · Repairing Kef B139 SP1044 Woofers I've found that the glue between the spider and the middle cone has deteriorated and resulted in a total separation. 95 £237. However, there is still a fair amount of old glue left on it. Vintage KEF speaker B139 - SP1044 | Sound & Vision, Home Audio & HiFi Separates, Speakers & Subwoofers | eBay! Find great deals on eBay for B139 Kef. 8 – is this reasonable? What other drivers may be appropriate? Nov 30, 2017 · Hello, I'm posting regarding my continuous struggle to fix my old fathers IMF TLS 80s, mk1 Because one KEF B139 was broken 20 years ago, he has not bothered to replace it, and its been dusting away. They are all the same; SP1044 in this case; hence the confusion. It read about 663-665ohms. 2 new watchers per day, 28 days for sale on eBay. On passages of music with strong bass notes it has started to make a rattle/buzzing sound which is audible from the seating position. 50 Buy It Now May 16, 2017 · - 2 pairs of B139 SP1044 woofers - 1 pair of B139 SP1042 passive radiators Basically these represent the drivers pulled out of a pair of KEF 104 Reference and a pair of KEF Concerto speakers. Vintage KEF SP1044 B139 Driver - 8 Ohm Woofer Speaker TESTED AND WORKING!! #9 Pre-Owned 2 product ratings - Vintage KEF SP1044 B139 Driver - 8 Ohm Woofer Speaker TESTED AND WORKING!! #9 $49. KEF B139 (SP1044) replacements: For KEF models utilizing this bass driver, Falcon Acoustics manufactures the Falcon B139 to original specifications with improved power handling. Plans 11 watchers jtre2650 100% positive (439) Sponsored FALCON B139 8 ohm KEF B139 SP1044 - NOS REPLACEMENT WOOFER New (Other) C $561. Thiele-Small parameters, measured frequency response curves, and acoustic performance insights. 0 new watchers per day, 385 days for sale on eBay. You could do a tall box of the same volume and tuning which IIRC was 35 or 40Hz. Dec 30, 2008 · The B139 bass units were used in quite a few KEF models. 95 £269. Super high amount watching. I've just noticed that one of the KEF B139 woofers in my IMF RSPM's has become a little noisy. Best known for their bass presence in the IMF TLS80 transmission line speakers and other such uses. 3 x 10-7 cm/dyne) Equivalent volume of KEF B139 sp1044 Woofer (New/unused)Buy a KEF B139 woofer for your next DIY project. Voice coil diameter: 55mm. REPLACEMENT DRIVER SETS: For KEF CONCERTO/KEFKIT3 CAMBRIDGE R40, and for KEF based system such as the CAMBRIDGE R50/WEBB TL/CHRIS ROGERS systems and the LINN ISOBARIK. The Konstructor did not reach as low Hz in print and in room yielded disappointing thinner bass frequencies. Mar 27, 2023 · KEF B139 SP1044 Forumregels - Lees de gebruiksvoorwaarden om iets aan te bieden én om te reageren. The components used in the construction of the Falcon T27, B110 and B139 are the same as were used in the original KEF T27, B110 and B139. Using them in a TL design generally increased their power Tieftöner KEF B139B SP1044 / Gebraucht / verkauft, KEF Lausprecher Set 2x B139, 2xB110, 2x Morel CAT 298, DN12 (KefKit3) / Gebraucht / verkauft, Tieftöner KEF KEF B139 SP1044 MATCHED PAIR BASS DRIVERS !!!LOOK!!! Photo Previous | Next The Falcon B139 is designed to be a genuine and exact replacement for KEF B139 SP1044 applications. Minor signs of use. This black speaker from the renowned brand KEF is wired with an impedance of 8ohm and come with a manufacturer's warranty. Thiele-Small parameters, product details, and an extensive photo gallery. If the colour is not to you liking, they could be repainted. Load capacity: 100 watts. I travel to the GTA about every week and I could meet between Windsor Used in many KEF, IMF etc. The SP1044 is the specification type number and is the same as the SP1044 used in numerous KEF and other speakers. 39 Qt ). Aug 31, 2010 · Yes, these are the B139, later versions with black painted cast chassis, inverted rubber surround. 87 L (E) 1. DCR is 7. Nov 22, 2024 · Identify, repair or replace mid range speaker in B139 based setup Mar 19, 2025 · Find many great new & used options and get the best deals for Vintage KEF speaker B139 - SP1044 at the best online prices at eBay Australia!. One of the B139 drive units has stopped working. Mar 25, 2025 · Find many great new & used options and get the best deals for KEF B139 (SP1044 )BASS DRIVERS at the best online prices at eBay! Free shipping for many products! Oct 12, 2020 · This last weekend I finally got my hands on the new Falcon Acoustics B139 woofer. Some of these include: Both Bailey's original TL and his later triangulated line, IMF TLS80 & Reference Monitor, Atkinson's State-of-the-Art TL, the Chris Rogers Pro9TL, the Webb TL, the Linn Isobaric, the Coffin, and in a number of Kef's speakers Many of these also used the Kef B110 midbass May 30, 2021 · Infomation on rebuilding Kef B139 speakers as these cannot be done by standard rebuild method because of their solid styrene 'cone' Thanks. I've checked the crossover and th Jan 16, 2025 · Vintage KEF SP1044 B139 Driver - 8 Ohm Woofer Speaker TESTED AND WORKING!! #9 thisvintagecloset (2644) 99. As usual it is best to get the t/s parameters yourself. They don't have a very high power rating in a standard bass reflex enclosure (about 50 watts max), but they have been used in a number of transmission line designs by other manufacturers. The Concerto 3 ways are probably the most well known use of these units in KEF speakers. The version of the B139 I have is the 6171 model. Shop with confidence. Find many great new & used options and get the best deals for KEF B139 / SP1044 Speakers at the best online prices at eBay! Free shipping for many products! Feb 13, 2025 · Kef B139-B wooferFALCON B139 8 OHM KEF B139 SP1044 Allmost like new . 24 mech Q Suspension compliance, CMS: 9. Each specification has been taken from a KEF document. 0 channel bookshelf speaker made of metal in a rectangular shape. 0 sold, 1 available. Oct 23, 2016 · You may want to post a similar thread in British Audio forum where there will be more folks familiar with KEF and the B139. Make Feb 26, 2025 · Kef B139 SP1044 Bass Drivers. Subwoofer KEF B139 SP1044. Designed by Malcolm Jones, the original KEF B139 designer. Jun 5, 2015 · I am hoping for feedback on this idea: A closed transmission line at 1/2 wavelength of 110Hz with a B139 driver at the front and a B139 resonator at the end. I plan to use B110's at the mid bass drivers to 3 kHz. If these were all together, I'd wager that they are the B139 SP1044 (1975 on version with eared racetrack oval frame), B110 SP1003 (1975 on Bextrene model), T27 SP1032 (modern version) and the Celestion HF2000 (8 or 16 ohm version?) Technical specifications KEF B139 SP1044 12-inch subwoofer driver. These are the later version with cast aluminum frame and 100 wpc power The Falcon B139 is designed to be a genuine and exact replacement for KEF B139 SP1044 applications. I purchased this pair back in 1974 with the idea that I was going use them in a transmission line speaker. This component was employed in the KEF Concerto and the popular Bailey T-line design HiFi speakers. Allows later version SP1044 B139 to be fitted into the cutout and rebate of the early version SP1617 B139. Jan 14, 2025 · Find many great new & used options and get the best deals for KEF B139 SP1044 BASS DRIVERS at the best online prices at eBay! Free shipping for many products! KEF B139 SP1044 Woofers (NOS}. The driver uses a re-tooled Expanded Polystyrene Foam piston with precisely matching density characteristics to the original, covered in a protective black anodised aluminium foil skin. In 236383500721 Especificações técnicas do subwoofer KEF B139 SP1044 12-polegadas. Pair price. 1976 VINTAGE MATCHED Pair KEF B139 SP1044 6. A bit slow in terms of transient response, due mainly to greater moving mass than many similarly-sized bass drivers, the B139 can nevertheless plumb the depths with the best of them Oct 17, 2012 · Hey guys, Been going through some of my parts that I have, and I decided to see how the busted Kef B139 that I got with my IMF's read out on the DMM. I now have tried to fix the TLS 80. I found an on line history of all sp# of KEF B139. Pair is in good working order. Asking $150. 43x10e-4m/N V (AS) 127 litresBl 12. In addition, the suspension uses a neoprene roll edge with excellent linearity and durability to obtain a wide range of piston motion. Some of these include: Both Bailey's original TL and his later triangulated line, IMF TLS80 & Reference Monitor, Atkinson's State-of-the-Art TL, the Chris Rogers Pro9TL, the Webb TL, the Linn Isobaric, the Coffin, and in a number of Kef's speakers Many of these also used the Kef B110 midbass Used KEF B139 Subwoofers for sale on 400+ second hand hifi sites & shops. My question is: do you think it would be worthy to build a 4 way speaker, based on the design of the Acoustic Research PicClick Insights - Vintage KEF speaker B139 - SP1044 PicClick Exclusive Popularity - 9 watchers, 0. However, the characteristic of a speaker is a very personal choice. Kef B139. Also I have the related crossovers. 5g (B=54g) R (MS) 1. Thiele-Small parameters, performance data, and box design options. From Linn Isobarik loudspeakers. - Registreren om een verkoopadvertentie te plaatsen? Lees dan eerst dit. We buy and sell vintage and modern Hifi, as per the information in the ‘registered as a business seller’ section ————————————————- Tested and working Used Pair Fast and safe shipping Apr 12, 2007 · [b] [size=3] [color=#4169e1]KEF B139 SP1044, 8" x 12"低音喇叭 (俗称运动场),MADE IN ENGLAND [/color] [/size] [/b] [b] [size=3] [color=royalblue]二手拆箱的 一对1050元包华宇贷运 [/color] [/size] [/b] KEF B139 sp1044 Woofer (New/unused)Buy a KEF B139 woofer for your next DIY project. The KEF specification (SP) number denotes a specific drawing, manufacture and test procedure. l40zkm 7q mbdx p2rwo r4ixav vqxma mw lsbm tg ar4