Fullrange Speakers     Introduction   Theory   Drivers   Driver Parameters   Frequency Response   Open Baffle   Box Cabinet   TQWT and T-line   Rear Horn   Front Horn   Full-range Issues   Axiom 80   Lowther   Super 12 Horn Speakers DIY Projects Other Stuff Fullrangedriver.com
		Full-Range Drivers This page presents many known or respected full-range or wide-range loudspeaker drivers that are currently in production, and a few that are no longer made. I will not cover all current or historical full-range drivers. See also the new page for Driver Parameters and also Driver Response graphs. (Some driver parameters are listed on this page, but if I have full information then I put it on the next page). Bob Stout also maintains a list of full-range and wide-range drivers. Full Range Driver museum Drivers are listed in alphabetical order. AER The AER company from Germany produces one full range driver, the AER Mk 1. This is basically a Lowther replacement speaker manufactured to very high quality. Ferrite magnet. Frequency range 20 Hz - 21000 Hz ± 2.5 dB. Sensitivity 102.5 dB/ 1W/ 1m ± 2.5 dB. 20.2 cm diameter. As well as the AER website, more information is available at Bert Doppenberg's BD Design website (he is an AER distributor). Altec Altec made the famous 755E and 755C 8" full range speaker drivers. These had Alnico and ferric (iron) magnets respectively. More information on Altec drivers and enclosures here at Sound Practices. Altec Biflex 419-8B pictures: front, rear. ATD ATD line from Italy. These are like the PHY-HP and Supravox "semi full range units". Distributed in the USA by e-speakers.com . ATD 17LB wide band, Fs 99 Hz, Qts 0.6863, Vas 19.5 liters, SPL 92 dB, more here. ATD make the Veravox drivers. Cantare Audiosysteme sell these or modified versions, as do ATD distributors in Italy. Audax Audax HT080MO. Power Handling, 20 watts RMS/30 Watts max. Freq resp: 80 Hz - 18 kHz (Other sources quote 100 Hz - 20 kHz +/- 3dB), Fs 80hz, SPL 86db 1watt/meter, Qes 0 .79, Qms 2.48, Qts 0 .6, Xmax 1.5mm. Available in the US from Parts Express for $15.90 each. HT210A2. 200 mm (8 inch), 100-17000 Hz, 94 dB sensitivity, Fs 55 Hz, Qts 0.55, Vas 61 liters, Sd 210 cm2, Bl 5.8 Tm, Xmax 0.6 mm, 55 Watts max power. Audion LB1. 187 mm, 85-20000 Hz, 98 dB sensitivity, Fs 85 Hz, Qts 0.45, Vas 15.9 liter, Sd 132 cm2, Bl 5.4Tm, Xmax 1.0 mm. Auratones Text from James Pettingell. There is one possibly very important fullrange/wide range driver you may want to add to your list of drivers. The Auratone 5" as found in almost every recording studio. I don't believe they are made any more but they are fairly cheap to buy used and without any treatment (damar) appear NOT to have a large rise in response between 1.5 and 11k like the 40-1197/Fostex FE103. They have responded well to better cabinets, wire, damping of driver frame etc. and may not need a notch filter or Zobel for most people. I say include them so home audio people will become aware of what many of the recordings they listen to may have been checked on, Auratones may also be useful for home theater, extra speakers through out the house, etc. The specs as listed in Audio annual equipment directory Oct 1983 are: 100-17k, 89db 1watt/meter, 3 watts min power, $90 pair for 5c sound cube. I have found at least two different drivers in the 5c,one is a square magnet with less cone excursion and the other is a round magnet (both ceramic). I believe the round magnet versions are the better of the two (more bass/treble). They have they nick name "horrortones" but I think I know why. People think that just because these are cheap speakers you can hook them up to an amp pulled from a dumpster and use an undamped driver and cab. I have found the opposite, they are highly sensitive to wire, amps and any other things that may cause nasty sound in your system. Never the less they are still used today in recording studios because there is no weirdness from a tweeter, crossover, or ported box to screw up the sound. Not many drivers can be used without some sort of compensation, Auratones are among the few (although bass challenged). Maybe someone out there may want to have these produced again with a cast frame, alnico magnet or round ceramic magnet with copper shorting rings or maybe just take some ideas from the design. Drivers this size are surprisingly cheaper to produce than larger sizes. If you find out any history about the company or the designer please email me or post the info on your site. I hope I have sparked some interest. B&C Some good information from Eric. B&C speakers responded me concerning the avaibility of this 12" loudspeaker, According to M. Bartolini of B&C speakers 'RD-LAB, foreign people could buy this product straight from their retailer. For US and Canadian people no problem with B&C speakers in the States. There are two sorts of 320 K, one with a corrugated main cone model B , and one with the smooth cone model A. I bought the corrugated one. The winding of the coil is more important for the corrugated model in 8 ohm. So the Xmax is 1.5mm rather than 1mm. The Qts is a little lower and the Bl is higher. The frequency curve of the two products are closed together. I could not test and compare the two models. The B&C datasheet is in Adobe Acrobat format. The loudspeaker needs (as usual for public address loudspeaker) cone treatment, without which the violin sucks a bit with the same sound. With damar and also other treatment combining Copal varnish, graphite powder and butyl latex, the sound is very good. Each speaker is mounted in a simple baffle made of three pieces one major of 1.5m x 0.5m + 2 articulated additional parts of 1.5m x 0.3m.  Two 2231A JBL 15" are mounted at the back of the baffle. to give a little more bass (that's not at all the best loudspeakers for this use, but I didn't want to spend more money !). That gives only a little less bass. I didn't use a tweeter at this time. With a simple correction of the treble in my preamplifier, I obtain good treble. The bass, mid and high-mid are very good, very quick as regard to the price of the product. But even with the cone treatment, the high-treble as not so analytic as the one given by a good tweeter. That's not surprising in regards of the size of the membrane (12"). I think that first this loudspeaker needs rather a phase plug rather than a thin textile dust cap (the magnet is not ventilated), the high mid and the treble could be better. To do that,  time is needed. I will certainly test that with the third loudspeaker I have in this original state. First, I shall put a simple pair of Beyma compression tweeter CP16, with a simple cap, to obtain more analytical high end. Babb Speakers Babb Speakers. Full range drivers using a Teflon bearing instead of a spider to hold the voice coil. Metal cones. Several different drivers including 6" x 9" speaker with a 30 oz. magnet, 34 - 18,000 Hz. +/- 5db, 80 watts RMS power rating, Waterproof. Aimed at the marine and automotive markets, but some people have used them successfully in hi-fi applications. The new Lorelei has been specifically designed for hi fi. Bandor The Bandor 50 from www.bandor.co.uk. Beyma Beyma Loudspeaker Drivers. The best information is at the French site, click on the French flag (on right). Two full range drivers of interest: 12AG100. Dual cone, 12 inch, 8 Ohms, 80 Watt max, sensitivity 101 dB 1W@1m, frequency range 50 - 18,000 Hz, xMax 1.5 mm, Thiele Small parameters: fs 60 Hz, Qts 0.7, Vas 92 liters. Die cast aluminium basket, paper cone, plasticized cloth surround, and copper voice coil. However, note Frater Perdurabo's opinion here: I own the "full range" 12AG100s, and to be blunt, they are useless for music reproduction in the home. They are PA speakers, period, and are easily the worst sounding transducers I have paid money for in my entire adult life. 12GU. Dual cone, 12 inch, 8 Ohms, 100 Watt max, sensitivity 101 dB 1W@1m, frequency range 60 - 12,000 Hz, Thiele Small parameters: fs 70 Hz, Qts 0.475, Vas 60 liters. Die cast aluminium basket, paper cone, paper surround, and copper voice coil. There are also some cheaper 10 inch and 8 inch drivers featuring stamped steel baskets. C37 Sound Systems C37-Mini-Sound-Instrument (click on Home Audio) is a loudspeaker by C37 Sound Systems, designed with a MAM 137 driver which produces more natural sound than the Fostex FE 127 (which they had been previously using). They are reportedly very musical and can be used full-range at low volumes. For more output, filter out the lows around 90hz and pair with a sub. They also have large woofer drivers for mating with tweeters or super tweeters. Cui Stack CUI-STACK - this company makes a range of drivers. Most of them are for muzak type installations - and are available with alnico magnets! But they also make TV speakers, and a few of those such as model number GF2001 qualify as full range, roughly 75 Hz - 20 kHz, 8 inch diameter, 5.3 oz magnet. Coral Drivers made somewhere in Asia. Apparently out of production since 1985. One source said "rocks the socks off Lowther and Fostex". Price was 10,000 Yen (approx $90 US) per pair. 20cm double cone, 8 ohms, 10W, 95dB. Picture of the Coral driver. Brochure (image), Specifications (image) and Box Image (high resolution image —to show the box dimensions). Large image of all Coral drivers: pictures and specifications. Diatone The Diatone P-610 is full range, approx 92 dB for 1W at 1m (possibly up to 94 dB in a cabinet). The Diatone has enough excursion to provide reasonable bass output power without horn loading, allowing simpler bass reflex cabinet enclosures. The Diatone also has a very smooth frequency response. See owner's comments by John Rivers. Diatone loudspeakers used to be manufactured in the USA by Gordon Rankin of Wavelength Audio, under the name JPO Memorial. Full Diatone driver parameters are on the Parameters page. Another person measured the Diatone driver at these Thiele-Small parameters which are quite different to the extensive measurements on the Parameters page, so take all this with a grain of salt: Qt = 0.7, Fs = 70 Hz, Vas = 0.425 cu ft (12.035 liters). The best measurements are the ones on your own drivers. The cabinets that Mitsubishi currently recommend are about 27 liters total (for a vented cabinet?). Use Steven Reid's box calculator to calculate box volumes. Diatone drivers and cabinet kits are here at EIFL Export. See more boxes in the Enclosures section. Electro-Voice Electro-Voice Some vendors offer an Electro-Voice driver that goes up to 12K kHz or so... EMI EMI 93870 AW. EMI's are elliptical, built for Decca by EMI, are very good, fast, and uncoloured. Construction is pressed steel frame Alnico magnet (which looks very similar to the Diatones). These are historical, out of production now. Eminence Eminence Speaker. Beta-12LT is a wide band driver, Fs of 60 Hz, goes to approx. 10 kHz. Qts 0.57 Vas 82.62 litres (2.9 cu ft) Xmax 0.8mm. This driver uses the same basket and magnet as the Hammer Dynamics Super 12. The cone shape is similar, but there are many other differences. The same filter network cannot be used in both cases. More information on the differences is available below at the Super 12 driver. Fertin Michel Fertin builds these drivers by hand in southern France. The FLB20D40S has a diameter of 200 mm, iron magnet, Fs of 35 Hz, frequency response to 23 kHz and 100 dB sensitivity. The FLB20D40EX also has a diameter of 200 mm, but uses an electromagnet that uses 2 amps at 12 volts, Fs 35 Hz, max frequency 21 kHz, 100 dB sensitivity. Fertin also builds two larger drivers for bass/mid bass applications, also with electromagnets. Thiele-Small parameters for the 200mm full-range. RF 44.5HZ, Qts 0.323, Qms 6.968, Qes 0.338, Vas 0.052. Peak displacement +/- 3mm, Voice coil res 6.3, Diaphragm area 0.02 m3, Ces 0.0001917, Res 129.8, Les 0.0667. Thanks Thorsten! Fostex Fostex Sigma series are designed for backloaded horns. These drivers are the FE108 Sigma, the FE168 Sigma, and the FE208 Sigma. Their efficiencies are 92, 94, and 96.5 dB respectively. Fostex make many other full range drivers, including the standard FE series. Many of these are designed for baffle/vented box installations. The smaller diameter FE drivers have dome center caps while the larger ones have dual cones. Fostex driver magnets include both ferrite and alnico. Fostex have a new driver called the FE208ES which looks nice; large dual magnet structure, new cone ribbing, designed for rear-loaded horns. The Adobe Acrobat FE208ES data sheet includes plans for a folded rear-loaded bass horn. Efficiency 99 dB/W/m. Price about $355 each, compared to approximately $140 for the FE208 Sigma. Fostex make a driver called the FE103 Memorial which looks like an upgraded version of the 103, but is not easily available. Fostex drivers are now available in the USA from Madisound (see specs. and frequency graphs on Madisound's Fostex page). Fostex website Madisound Fostex full range drivers catalog (You will need a copy of Japanese acrobat to read it but the pictures and response graphs come through in English acrobat). In Europe, ACR Drivers from Germany are simply rebranded Fostexes, available from HiFiSound and BD Design. Furuyama Audio Laboratory A full range driver with a flat diaphragm. Model FLAT-B: Impedance 4 ohms, Frequency Response 25 - 16,000Hz, Sensitivity 93 dB, Size 250Hx183Wx110D mm. Drivers and speakers can be seen at SIBATECH, inc. Galaxy Audio GALAXY AUDIO S5C160-8 5 inch full range driver. Actually it is more a wide range driver, nothing below 200 Hz. It features a proprietary non-ferrous frame, 40 oz. magnet structure with vented pole piece, underhung voice coil, and linear spider. The 1""Kapton voice coil is ferrofluid cooled to reduce distortion and power compression. Optimized for sealed box enclosures. Made in the U.S.A. *Power handling: 100 watts RMS/140 watts max *Voice coil diameter: 1"" *Impedance: 8 ohms *Frequency response: 200-18,000 Hz *Magnet weight: 40 oz. *Fs: 140 Hz *SPL: 92 dB 1W/1m *Vas: .24 cu. ft. *Qms: 1.34 *Qes: .38 *Qts: .30 *Net weight: 3 lbs. Parts Express #290-015, $37.85 each. Goodmans Ted Jordan made drivers for Goodmans (English hi-fi maker) that were really awesome—the Axiom 80 10". This uses two cones (main and whizzer or free cone) and has cantilever suspension. Goodmans Axiom 80 Page (in English, from Germany). Axiom 80 picture with specifications. Picture of bass reflex and rear loaded horn enclosures. More Goodmans Axiom 80 driver pictures here. There are also Axiom 201 12" full-range drivers, which measure 101db/W/m with pink noise Power is 15W and the resonance is at 35Hz. (FYI, Theil uses custom made Jordan drivers). See Thorsten's excellent Axiom 201 report in the DIY pages (amazing speakers apparently). More Axiom pictures from Richard Pierre and Mick Maloney (thanks): Axiom201, Ax201enclosure1, Ax201enclosure2, Axiette1, Axiette101-1, Axiette101-2, Axiom150, Axiom22, AxiomEnclosure, AxiomVarious, GoodmansVarious, TriAxiom. Mick Maloney has a cool Goodmans page. The Axiette 8 driver uses regular suspension (rubber surround and spider). Specs are in this picture. Hammer Dynamics Hammer Dynamics by John Wyckoff. Finally, a (nearly) full range driver with amazing bass, fantastic dynamic range, and high sensitivity (John's description). The Hammer Dynamics Super 12 has an honest band width of 45 Hz to 11 k Hz, sensitivity of 97 dB 1W/1m (conservatively rated), will handle 120 watts and sounds wonderful at all volume levels. This system is a kit which includes: two Hammer Dynamics Super 12s, two super tweeters, all the notch filter components, film and foil super tweeter filter caps and a set of cabinet plans for bass reflex vented cabinet. Price $650 including shipping in the USA. This system is very sensitive, you can blow yourself out of the room with a single 300 B per channel and 2A3s work just fine. John spent two years developing this system and it exceeds his expectations in every way! The Thiele-Small parameters for the current Super 12 driver are Fs 46 Hz., Qts 0.38, Vas 112 liters. However, the Hammer Dynamics box design is nothing like the parameters would suggest. Dick Olsher gives a very positive review of the Super 12 at Enjoythemusic.com. See Bill Wilborn's review on the DIY page of the discontinued 6 inch Kevlar driver. Editor's Note: John gave me a pair of the Super 12 drivers to me as a gift (for advancing the cause of "full-range"). Thanks John! John Wyckoff's description of the Super 12 (compared to the Eminence Beta-12LT) Cone composition: Beta-12LT is conventional Kraft type. Super 12 is slightly heavier (different mix of fibers). Voice coil: Super 12 has smaller gauge wire with a Nomex former. (I dropped the Kapton former after the first ten samples.) Beta-12LT uses Kapton former which is not quite as neutral in the mids. Super 12 coil is slightly lighter bringing moving mass to about the same. Super 12 uses one shorted voice coil turn to reduce inductance and improve high frequency response. Motor: Super 12 has a soft-iron polepiece to improve BL. Beta-12LT has low carbon steel. Super 12 has shorting ring at the base of the polepiece and is capped with an aluminum shorting ring (also called Faraday ring). Spider and suspension: Super 12 spider is woven Kapton fiber and is slightly softer. The suspension on the Super 12 is doped to be slightly stiffer. Glue: Super 12 uses a lower-mass, harder formulation, and less of it. Improves high frequency response. JBL The JBL LE8T-H is listed as obsolete on the JBL Pro website, but may be still available (in diminishing numbers). Specs are here. Good reports on this driver but they may be all gone. Jordan Ted Jordan. One of the most famous names in the full range business, for many, many years. These little aluminium beauties aren't very efficient (84 to 88 dB), but for a transistor amp fan who wants to build his/her own real transparent mini monitors, these might be the best way to go. High power tube amp owners (20 W plus) might also work. The Jordan JX-92 is currently used in an Acoustic Precision design, which is getting good reviews. The JX-92 can be used full range. JX92 specs include 92 mm metal cone, Fo 45 Hz, extension to 20 kHz, Qts 0.44, Vas 12.18 liters, SPL efficiency 86.45 dB 1m 1W. News flash ! The Jordan JX-92 has been updated to the JX-92Sand now has greater sensitivity — 88db. It is now called the JX92S. Jordan JX-92SParameters The Jordan Linear Array system can also be used mostly full range, one crossover at 100Hz, with a bass unit rolling in at 6dB/octave. UK distributor is Jordan. US distributor is Creative Sound Solutions (in Canada). Lowther Drivers from Lowther are approximately 8 inches (200 mm) in diameter and between 96-101 dB for 1Watt at 1m. This is among the highest efficiency of any single full range drivers. This makes them suitable for low power amplifiers (1 to 10 Watts per channel). Lowthers have a limited power handling capability, making them unsuitable for high power amplifiers. The cone excursion of a Lowther driver is plus/minus one millimete and this limits low bass power, requiring horn loading to raise the bass output. Lowther drivers come in three flavors: ferrite magnet (C series), alnico (aluminium/nickel/cobalt) magnet (A series), and the newest is the neodynium magnet (DX and EX series). Lowthers are one of the more expensive drivers available. Lowther factory website Lowther America Lowther history Excellent info on Lowther drivers and enclosures Frequency response for one of the Lowther drive units (other curves here) Thiele-Small parameters for one DX3 drive unit. Beauhorn is now offering a hand-turned wooden phase plug. Lowther drivers have a deserved reputation for dynamics, clarity, and "realism". However, they are not without problems, including light bass response in most cabinets, unevenness in frequency response, and some "shout" in the upper registers. Most people seem to love their Lowthers despite these characteristics. Read the opinions of one ex-Lowther owner, John Rivers. I am trying to get a Lowther page together. Some of it is here under construction Manger Manger drivers are bending wave transducers. They have a flat diaphragm which is "bent" to produce sound waves, rather than pushed and pulled like a regular speaker cone. The frequency range is 80 Hz to 33 kHz, sensitivity is 84 dB 1W/1m for the iron magnet, 90 dB for the neodynium magnet. See a Manger driver in a rear loaded horn (in German). Distributed by e-speakers.com in the USA. MCM Electronics Aluminum cone drivers from MCM Electronics: PN 55-1291 and 55-1870. The 55-1291 works down to about 90Hz on an open baffle, and is discussed in the Whamodyne Files at bottlehead.com The 55-1870 will go 54 Hz to 15 kHz in a .35 cu ft vented box. Monacor Monacor has a range of HiFi full range drivers. SP-200X, SP-80X, SPH-60X, SPH-64X/AD, SPH-68X/AD. Parameters for the SP-200X and others are listed at the Monacor website. Rear loaded horn speakers based on these drivers. Monacor also have some small public address type full range speakers, both the 100V system (not very useful) and 4 Ohm ceiling speakers. These are not really hifi speakers as their Fs is 200 Hz, not nearly low enough for a full range system. Moth Audio Cicada driver as used in their Cicada loudspeakers. Sensitivity: 94db, Nominal impedance: 12ohms, Diameter: 7 1/2". Fs = 50 Hz, Qms = 6.54, Qes = .75, Qts = .67, Vas = 21 Liters. Norelco Made by Philips. The 9762M is a historical (old) full range driver used by Dan Marshall and others to good effect. 9762M front side, 9762M back side. The Philips part number is AD 5200M. Front of a Philips, back of a Philips. Orca Orca Axon 4sf-01 Apparently very sweet, available in limited quantities from www.warco.com.au. See specs in the Parameters page, also in this image and frequency response in the Response page. Parts Express Supplier of lots of loudspeaker parts, Parts Express has (or had) a little 4 inch wide range driver, product number 269-469. Frequency response: 118-18,000Hz, SPL: 90.5 dB 1W/1m, VAS: 0.11 cu. ft., Qms: 5.27, Qes: 0.71, Qts: 0.63. Price was $0.95 each. Yup, 95 cents each! Some folks are building line arrays, see messages 1136 and 2752 on Audio Asylum. See this site for nice measurements on these drivers with Dammar coatings, lacquer coating, in boxes, baffles. PHY-HP PHY-HP in France. Their "semi-full range" driver is a single cone model that only goes up to 12 kHz or so — they also make a coaxial model. But all their stuff is brass plated, absolutely gorgeous, and comes with alnico magnets and 16 ohm voice coils. Although PHY-HP charges Rolls-Royce prices, they do provides Rolls Royce level service. Orders ship within a day or so of his receiving your check. (Provided what your order is in stock; call or e-mail first). And of course there's that nifty pair matching within 1%, and a lifetime warranty. Specifications as images from Phil Sieg (thanks): Specs 1, Specs 2, Specs 3, Specs 4. PHY-HP have a distributor in England, G T Audio, who will apparently ship internationally. They have a distributor in California, Dennis Pawlik, APEX website, Email apex@2000apex.com, phone 415 897 5616. Pioneer Pioneer PE-16M (Memorial) can be seen here at EIFL. 8 ohm, sensitivity 92 dB/W(1m), max input power 20 W, 42 Hz - 16 kHz, weight 1.1 kg, fo 80Hz, magnet: Alnico, dimensions 165mm x 113mm (depth). $250 per pair. Frequency response graph. Picture. Pioneer A11EC80-02F 4-1/2 inch, Parts Express #290-010. They are or were $10.90 ea. Power handling: 20 watts RMS/30 watts max *Voice coil diameter: 1"" *Impedance: 8 ohms, Frequency response: 70-15,000 Hz, Magnet weight: 9.3 oz., Fs: 70 Hz, SPL: 90 dB 1W/1m, Vas: .31 cu. ft., Xmax: 1.1mm, Qms: 1.40, Qes: .47, Qts: .35, Net weight: 2 lbs. Pioneer B20FU20-51FW, Parts Express #290-045. They are $24.50 ea. 8 Ohm, Fs 36, Qts .25, as 2.83, 20 oz magnet, 1" VC, Xmax 1.0mm. Radio Shack 4 inch through 8 inch units. Many are no longer made or stocked. The magnets are often small on the larger drivers. One driver that people love is the 40-1354. Herbert Jeschke is using them successfully in a TQWT described here and reviewed here. Check out the article using Radio Shack drivers in Valve Magazine, Vol 6, No 4, 1999 at Bottlehead.com. T/S parameters for some Radio Shack drivers. Frequency Response for some Radio Shack drivers. One of the more interesting is a 4 inch (100mm) driver with what looks like an 80mm diameter cone, a large magnet, frequency range 80 Hz - 18 kHz, part number 40-1197. It appears similar in design to a Fostex FE 103 (and newer FE 107). The Fostex specs are the same as those printed on the Radio Shack box. The Radio Shack units might be worth playing with — a cheap way to experiment. Also some people are extremely happy with the 970-0551 8" full range dual cone, 36 Hz - 17 kHz, price $23.99. The 970-0551 is exactly the same as the Pioneer B20FU20-51FW, even listed as by Pioneer with that Pioneer part number on Rat Shack's website (thanks Roscoe). Also look into the 40-1271, 8" full range dual cone, 75 Hz - 25 kHz (though not much output at 75 Hz) with a curvilinear cone. A lot of people are using Radio Shack units in TQWTs. See the DIY page, and check the Full range driver forum for discussion, also the Bottlehead forum (you can do a search of the archives using their excellent search engine). Reps REPS R-1 Driver designed by Frank Reps. One of the most admired and most expensive full range drive units. Essentially a "super-Lowther". Price approximately $3500 a pair for the standard cone, and $4000 for the superlight cone. 200 mm diameter, 40 Hz to 20 kHz +/- 3dB, sensitivity 99.8 dB/W (1m), distortion at 100 dB SPL is less than 0.15%. Full specifications can be seen at RL Acoustique, click on Reps R-1. Contact info: Francis M Reps, 1201 Easy Street, Wickenburg, AZ 85390. FAX 520 684 5266 Roiene Roiene drivers (picture of RA160) are now available here at EIFL Export for between $260 and $458 US each. Approx 93-95 dB/W (m) These are new Japanese paper cone drivers with whizzer cone and alnico-magnet, made by Isao Yamamura (who once designed the Fostex 103a). The outer cone is 15 cm diameter, the whizzer cone 7 cm diameter. These drivers are available also in Germany at Auditorium 23 in Frankfurt. Harald's comments: "I bought them in Germany after I heard them for five seconds and I like them much more than my friend's Lowthers. I think they are fantastic, even compared to the green Saba 8" full range units I also have (on an open baffle). The Roienes I have are approx 2000 US dollars for the pair including the TQWT enclosures. They look very good IMHO and are made of 19mm birch plywood after plans from l'Audiophile magazine." Another site that has good info on the Roiene's is http://member.nifty.ne.jp/cham_music_offce/roiene.htm Seas SEAS H393 - it's amazingly flat from 100 - 9khz (about +/- 2db), has good power handling and sensitivity. It's a 5 1/4 inch unit. Sounds great - [Bill] I got a couple for surround, but they sound great in a B3 alignment as stereo speakers. (thanks Bill). Stephens Stephens 80fr 16 ohm 8" full range driver. These drivers have heavy alnico magnets and sound fantastic. They were developed in the 1950s and sold in the 1950s and 1960s. An 8-ohm version was developed later as the solid state era came into being but the 16-ohm version was developed during the tube era. Ron Gomez of the Audible Ear believes this to be the greatest full-range ever built, even better than WE755A. (Info from Don). Supravox Supravox have a number of drivers, with magnets of ferrite, alnico, and excitation (electromagnet). Their driver 215 RTF 2000 has minimal sensitivity 100dB, frequency of resonance 45Hz, max 20000 Hz. Magnet alnico 3.5Kg., winds diameter 35mm, cone membrane paper. Some information on the Supravox is here (click on HiFi), includes TQWT plans and picture of the driver. Some more specifications are here. Supravox now has a USA distributor at Supravox-America Tangband Speakers Tangband company located in Taipei City, "created with one overriding goal in mind to make innovative, high quality speaker drivers." 3" Paper cone mid-range/full-range driver. Sensitvity 87 dB 1W/1m, frequency response 90 Hz - 20 kHz, free air resonance 118 Hz, price approx $15 US each. John's Home Theatre using Tangband fullrange drivers Some Tangband drivers are now available at Parts Express. Triangle The Triangle driver is around six inches (150mm), single cone with phase plug, 8 ohm impedance, and 94 dB efficient. Power handling is 40 watts. Fs is in the 40s or 50s. Frequency response seemed to go up into the 20s; but was more raggedy than the say, a Diatone 610. On the other hand, if you use it, you don't have to pay airmail shipping charges from the Japan (which add considerably to the cost), and the power handling is much higher. This driver has evidently received a great review from Gordon Rankin (of Wavelength Audio) in Sound Practices. See specs and price at Zalytron. Uesugi Brothers (U*Bros) A Japanese company which makes hi end amps, may also make fullrange driver speakers — lots of pictures in StereoSound. Contact for Uesugi Labs is fax: +81-78-737-3277. Yamamura Be Yamamura makes all kinds of audio equipment including some delicious full range drivers. The old website was YamamuraChurchill. Aanvil Audio also used to have a section devoted to Yamamura. If you have any information on Yamamura horns, text, pictures, etc., please contact me. Top