Kef b139 crossover 2, Tweeter (hemisperical diaphragm): T15 Mk. You then have the B139 to use for subs if you want. 4kg Falcon B139, KEF B139 replacement. The result of nearly 3 years research by Malcolm Jones and Jerry Bloomfield of Falcon Acoustics Mar 26, 2025 · KEF transmission line 4 weg met B139 woofer Marktplaats €380 Feb 15, 2025 Como Ficho KEF B139 DOS UNIDADES NUEVAS EN SU CAJAS Como Ficho €250 Jun 22, 2024 KEF Concerto - Images, details, specifications and reviews B139 bass unit (A6171), B110 midrange unit (A6362), T27 tweeter (A6340) Crossover: A6606 System: SP1005 May 22, 2005 · Caution on using B139 even in an enclosed sub. 5 kHz: Adaptive input: 15 ~ 50W (8 Ω Load) Applicable Room Size: 280m 3 Less than or: Internal volume: 62 liters: External dimensions: Width 432x Height 711x Depth 305 mm: Weight: 25. 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 Sep 9, 2018 · This was one of the first speakers designed using computer simulations and calculations. Apr 9, 2021 · Crossover : I do have the 37k crossover in the Chorales, and it’s amazing when compared to the original x-over with out-of-spec electrolytics. Networks are supplied pre-assembled only. systems. KEF used the T27 and B200 which are active drivers, and a passive B139 which is a passive ABR. JoshHendi; Feb 15, 2016; Speakers; Replies 3 Views 3K The famous B139 provided exceptional bass quality and extension for the cabinet size and the new polypropylene-coned B160 allowed high sensitivity and power handling along with low colouration through the mid-band. Apr 9, 2021 · Hello Gentlemen, I’ve recently been researching various crossovers for the B139, B110, T27 3 ways. Or, also comparisons of any versions of the two mfr's models here. Apr 4, 2020 · I was thinking about building a simpler crossover, because the C80 has one of THE most complex crossovers imaginable. I had a schematic of the H crossover that a friend gave me based on his examination and measurements on his H kit. Alcap Solen & ClarityCap Capacitors. Price is for one crossover/network. These are ESSENTIAL to gain decent performance from the KEF drivers. The result of Sep 16, 2011 · Lynn Olson reports that the B139 had a 12db resonant peak at 1100 hz that had to be worked around. Recommended crossover frequency: 400Hz: Lowest resonance frequency: 23Hz: Output sound pressure Jun 15, 2012 · kef B139, B110, T27 + crossovers . Still the cabinet is not really big enough for the B139. Re Kef Upgrade Hi Metako, The KEF Constructor Series CS7 was based on the commercial Cantata which used the B139/B110 plus the more expensive T52,a refined version of the earlier T15. Many reviewers blamed the May 9, 2014 · In particular, interested in the KEF Concerto system model SP1006 with SP1003 mid & SP1032 tweeter drivers and SP1004 crossover (up to 1977) vs the IMF Super Compact MkII (@1978-1985). These are in a transmission line type cabinet. The KEF B139 was used in many commercial speakers and in many kits. Like all Concertos (kit or manufactured), bass will be a little flabby. Recommended Upgrade. The C80 was the second C-Series model to benefit from KEF’s ‘conjugate load’ crossover Apr 9, 2021 · Then they added (if I'm right) a third inductor in the mid section, like KEF did with its last iteration with the B139-B110-three way design, the CS7 (which uses the B110B and the T33A tweeter, so it is not sure if one could directly "translate" the mid and treble section of the Xover to the B110A and T27 combination, probably not. The older Fried models sound more accurate with a series crossover. Jan 11, 2006 · with the KEF B139 being the most famous example. A few points: Oct 2, 2015 · As a variation to the Bailey design the best DIY sub I have used is a Kef B139 in a TL with external box dimensions of 70cm tall x 36cm width x 56cm depth, with woofer and slot port facing up, which made it less directional sounding. . input: 15 Watts rms, 30 Watts peak System resonance: 80 Hz Dec 26, 2015 · Also, there are slight variations in the KEF drivers according to the SP (specification) number. ) Falcon B139, B110 T27 SET ( PAIRS). Each unit is hand built in Great Britain and tested by chamber-test frequency response curve test sequences. I get the impression that Falcon Acoustics are huge fans of the LS3/5A (B110 & T27), to the extent of manufacturing their own version of the B110 and offering a Morel tweeter as an alternative to the T27. 5kHz Would it be a good idea to upgrade the KEF - B139 6171 (40w) to one of their more recent 1044SP versions (100W) Apr 5, 2018 · I have a pair of Kef Calinda’s that seems to really lack any noticeable bass. Falcon T27, B110, B200 & B139 for KEF B110 B200 T27 & B139 replacements. Feb 10, 2013 · I have read good things about the Falcon Acoustics Kef Concerto (B139, B110 & T27) replacement of Kef's original DN12 crossover. New Mk2 Multilayer PCB for improved results. KEF Specialists. SP1044 from a Kef Brochure. My Crossover frequency: 400 Hz, 3. It has been said that the C80 cabinets are too small for the B139 woofer, so making larger cabinets would be a good idea, that's what I wanted to do as well. I used to have a sub, based on the '70s Linkwitz article, and while it sounded very good, it was rather volume-limited. Nov 28, 2023 · KEF K2 Celeste Mk. It seems falcon discontinued those vintage kef x-over upgraded boards so custom ones are the way to go regarding concertos if I get a pair. Thread starter circuitbender; Start date 2012-06-15 2:18 pm; Status Not open for further replies Oct 2, 2015 · Very fine sounding speakers. If not for the 6 deteriorated B200 I face, I might have shared with you a rebuild KEF104ab with a passive KEF crossover / 104ab derived opamp active crossover. These include the KEF Concerto, Kefkit 3, IMF and Wireless World Transmission Line designs as well as many more. Easiest is to use a good 8" or 6 1/2" crossing over to the T15. Designed by Malcolm Jones, the original KEF B139 designer. The only genuine B139 B110 TT7 SET AVAILABLE. II is the successor of the K2 Celeste introduced in 1962. LS3/5a, LS5/9 CABINETS & Falcon Q7, audio components, Loudspeakers by Falcon Scanspeak Seas SB Aco ustics Morel Accuton Audax Vifa Peerless, Coles 4001, LS3/5a parts & spares. Fried used exact same values in series crossover as parallel when he made the switch on later C2 and O2 models. Crossovers are the major weakness, but building a set of Radford crossovers is an excellent solution. Mar 24, 2011 · They're DIY Concerto kits, as others have stated. Full BiWire capability. Nov 29, 2006 · The old Kef and Dalesford used nomex voice coil formers that give that warm sound. The 1500 hz peak was a problem with bextrene but proper crossovers tamed the problem. It can also be used by those who own the KEF Concertos, for a substantial lift in performance. Calinda's are 2ways and have a 8" woofer (b200) a passive radiator (BD139) and a T27 tweeter. Oct 12, 2020 · KEF B139 vs Falcon Acoustics B139 image comparisons. 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?) B139B B110A T27A network, KEF Concerto, Falcon Acoustics with Falcon MH and HF upgrade. (It was not generally known that the B139 had a 12dB peak at 1100Hz with a very high Q. Designed by Malcolm Jones, the original KEF B139, B110 AND T27 designer. I am enclosing the full article along with my (1973) hand-drawn schematic for the Radford crossovers. They do hit bottom pretty quickly, and make a horrendous clatter when they do. Olson is not keen on the old KEF drivers. FALCON ACOUSTICS MF& HF UPGRADE This exclusive Falcon improvement designed by Malcom Jones improves the performance of this network for the KEF B139(SP1044) Price unknown (1 unit, around 1979) Commentary. 5% DISCOUNT FOR SET PURCHASES. Frequency range is quite limited at 45Hz - 15. I used the T27 which is marginally less sensitive but I prefer a less upfront treble balance anyway. The B139 is the older style driver, which is why it looks a little different. Used in many KEF, IMF, CAMBRIDGE etc. The isobarik enclosure allows a given bass response in an enclosure half the size of that needed by a single driver. 2, Crossover: DN8, take-over frequency 1 kHz Impedance: 816 Ohms Max. I am going to attempt the crossover rebuild myself but obviously don’t want to muck it up as this will be my first dealing with crossovers. They did this to present a "resistive" 4 ohm load to the amplifier. Jun 15, 2012 · kef B139, B110, T27 + crossovers . B110 & T27 supplied as matched pairs. Concerto has slightly larger, heavier cabinet with the exquisite character of the B139 woofer. The sound is thin. The only genuine B139 equivalent Woofer available. This class of driver offered piston-band operation through the midbass, but suffered from very low efficiency, limited power-handling, and severe high-Q resonances in the midband. Feb 3, 2009 · It has KEF B110 + KEF T15 + Coles 4001G super tweeter. Apr 18, 2018 · The O uses a KEF B139 which was not part of Fried's plans but was a woofer I really liked. kef B139, B110, T27 + crossovers. So the crossover values for the H satellite are the same as a genuine H but the particular components used were my own choices. Woofer: B139 Mk. I have a set of custom ‘Bailey’ TLs loaded with a kit from Kef Concerto Constructor series circa ’79-80 imported from Wilmslow. One problem would might be finding room for a mid in that cabinet. Thread starter JoshHendi; (KEF) crossover labeling. Dec 1, 2012 · - Kef B139 most probably the MKII - 6171 version (rated 40W in closed box), - Goodmans mid rage driver, - Celestion HF 1300 tweeter. Thread starter circuitbender; Start date 2012-06-15 2:18 pm; Status Not open for further replies Originally designed in conjunction with KEF, our Concerto Upgrade Crossover is designed to suit 3-way loudspeakers using combinations of KEF's T27, B110 and B139 units. ifwsw shrwp wbsod sgaf yyll eqamk xxsles hlrn pli ronrj ytjta fcd ehnks tvneiww rncq