Dynaudio Raw Drivers
Thenumber of (triode) valve amplifier producerstoday compared to two decades ago is phenomenal andthere's a steadily increasing interest in high-efficiencyspeakers, thus this page on my experiences ofhigh-efficiency speakers and some comments to what I'vepicked up from the web.Why bother about 95-100 dB/1 wattspeakers when we have almost unlimited poweravailable from solid state or digital amps? Why do peoplebuild two watt single ended triode valve amps withsubsequent need for extremely efficient speakers? Is itpure nostalgia or do these systems have something tooffer conventional hifi does not?I guess it has to be heard to be believed, and not onlythat, you have to kind of 'discover' the triodesound. Some will, some won't and taste cannot be argued,but not all will think flea-powered triode amps andhigh-efficiency speakers are the best since sliced bread.The need for extremely low moving mass calls for seriouscompromises in terms of possible cone break-up andpossible linear and un-linear distortion as I'llelaborate on later.There are not a whole lot ofplaces to go and hear low-wattage SETamplification combined with good high-efficiencyspeakers. And even if we do find such a place, there's afair chance we may leave, saying: 'Is that it?' I've heard 50,000 USD triode systems that really didn'timpress me. Silver trafos and everything to make the bestof sounds and yet it didn't convince me at all.
And Iheard a system consisting of a cheap Chinese triode ampconnected to pair of mock-up HES speakers that foreverchanged my ways of thinking hifi.Art Dudley/Stereophile has these comments:'Bear in mind that even the hard-coresingle-ended-triode movement wasn't conceived as just anew branch of high-end audio: It was intended as a wholenew tree, by hobbyists who considered the old tree to bevery, very sick. Routing for the waveguideis a bit tricky.
After slowly routing into thewaveguide, stop after reaching a level shown onthe photo to the left. Remove the major part ofplastic as seen on photo (mid). If this piece ofplastic is all of a sudden released duringrouting it can cause some damage to the edge ofthe remaining waveguide.The front panel is attached byscrews to allow more drivers to be tested. Frontand rear panels were given some paint and sides +top some vinyl wrap.
Increases test-cap-WAFconsiderably!TS data CA21REX-foam/magnets:The Fs really went upfrom this foam surround. I had hoped for some 40 Hz, but47 Hz is a bit on the high side.
From the Supravoxdrivers I learned not to worry too much about the Fs asthese drivers have an Fs around 65 Hz! Yet, they provideexcellent bass from 80 litre cabinets.Looking at the math, 55 litres cabinet volume is too muchfor the AN driver as well as the modified CA21REX driver.They both - ideally - should have smaller cabs, around 30litres, but here we go with 55 litres and should make anF3 around 42 Hz. The modified CA21 REX wasn't run in whenthese data were made and hopefully Fs will go down a bitand subsequently increase Vas.
Fs around 40 Hz would havebeen ideal. The foam surround has a thickness of 0.7 mm,where the Vifa C20 drivers use 0.5 mm foam. The Vifasurround is very narrow, where the new foam surround forthe SEAS has a larger half-roll. I guess 0.6 mm foam forthe SEASs would have been ideal. So what aboutsensitivity from these tweaks?The modified SEAS CA21REXto the left, 1 metre distance and 2.8 V. Red = SPL, blue= min.
I now call the driver CA21REX-FDM. Foam anddouble magnet. Now this SPL response is a surprise. Thebass response is very dependant on from where you mergethe nearfield response; here at 400 Hz, so don't put toomuch into the bass response.
It very much looks like thisfrom 400 Hz and down, but the absolute level may varyrelative to the mid and upper midrange.This driver appears to be more manageable compared to therubber version shown earlier. The rubber version had asudden shift in level around 800 Hz, where the 900-2500range had a 4-5 dB increase in level, making thecrossover construction quite difficult. Despite the foamversion having a minor dip at 1 kHz, this response ismuch more manageable as will be seen from the LspCADsimulation and final crossover construction. And not toforget: The response is some 94-95 dB/2.8V. More than Ihad hoped for. It is obvious that the heavy rubbersurround adds to the moving mass and the use of foamsurround helps increasing the SPL response significantly.To the right the SPLresponse from the DT300 tweeter with waveguide. Placingthe DT300 + waveguide on a relatively wide baffle furtherincreases the response in the 1000-1500 Hz range.
Compareto the narrow baffle of the. The DT300 +waveguide is indeed very suitable for speakers with anaverage sensitivity in the 95 dB/2.8V range.To the left both driverson the same graph.
To the right, the impedance and phaseprofiles of the drivers. With a 72 (ID) x 50 mm vent, abox tuning of 40 Hz is achieved.
It seems possible toachieve relatively high overall impedance and hopefullyan easy load on low-wattage valve amps.The crossover:My initial approach tothe crossover was a first order topology. Like theC17-II. Same tweeter and a big 8' bassrather than two smaller 6' drivers. Modelling seemedeasy but soon after starting hardwiring the crossovereverything went wrong.
A coil for the bass and a cap tothe tweeter and LCRs to control the roll-off at point ofcrossover. No problem at all, BUT the phase tracking washorrible - and it really didn't sound too good either.Same or reverse polarity of the tweeter gave almost thesame results despite nice performance in the LspCAD. Now,in LspCAD you have to correct the relative distance frommicrophone to drivers to render the phase tracking rightand this can sometimes be trouble. Where the C17 driversand the DT300 seem to emerge from almost the same plane,this was definitely not the case with the CA21REX-FDM andthe DT300.
The step response displays the bass drivermore delayed compared to the tweeter. Actually thetweeter had to de added 10 mm distance to the mic, withthe bass at zero. Hmm.To control the peak at 2600 Hzfrom the bass driver, a notch filter is needed with afirst order filter and it performed reasonably well. TheDT300 was no problem, but I guess the steep roll-off fromthe large 8' drivers was what caused the trouble andthe C17 approach simply didn't work. To cut a long storyshort, a 2nd order filter was tried and this immediatelymade everything fall into place.
Flat response, goodphase tracking and the nulling effect from reversetweeter polarity was deep as should be.So, speakers connected to the amp,volume tuned up one third, CD in the drawer, a drummerhitting his snare drum very hard at the intro - and Ialmost got a heart attack. 95 dB sensitivity isimmediately heard - and felt.
Talk about a fast speaker.Some CDs later this tuning turned out to be just toomuch. Basically flat SPL tuned up to around 95 dB, thebass a little retracted but very fast and articulate.
Butvoicing this speakers for at 95 dB sensitivity producedtoo much presence and 'right-in-face'. Detailsin spades, but vocal and sax to energetic. Time to revisethe crossover once more.The V5 crossover is a bitannoying as it came very close to the AN-E crossover andI didn't want to make a clone of this speaker, but aftervery little modelling and very much cut'n try thisemerged:A simple 2nd order filter and samepolarity of drivers.Abbreviations used: foam - driver fittedwith foam surround. 2 mgn - driver added additionalmagnet.
WG = wave guide. NO = no magnetic oil (oilremoved).The sound.TheCA21REX + DT300-WG-NO, version 5 - as seen above- has been playing for some time in our living room andI've gotten used to the sound. So, time to evaluate.This really doesn't sound like what I'm used to listento.
First of all, the increased sensitivity isimmediately felt and heard and it's very easy to turn upthe volume too much because distortion appears low.Driver integration appears excellent and no trouble inblending the sounds from the large 8' driver and the30 mm dome, thanks to the waveguide and crossover.What I had expected was some noticeable box colourationfrom the large, poorly braced and damped box. Not so.What comes from this set-up appear to come from thedrivers and what's reflected from the front baffle.It's difficult to reviewyour own speakers and in this case I feel like what Iread in magazine reviews sometimes.
Scepticism at thebeginning, but after some time you get accustomed to thesound and start enjoying what this speaker is good at.Because very few speakers are good at everything.I strongly suggest reading the editorial notes fromHiFi-World, Sept-06 issue. In this issue, 3 large speakersystems are tested - B&W, Tannoy and JBL. All veryhigh-end speakers at very high prices - and the editorcan't help wondering how very, very different they sound.They're all very good at, well, most of it, but still -very different. And we may go on indefinitely discussingwhich one is the best.
Which is kind of comforting,because there will never be a definitive speaker beingthe role model for all other speakers. Well, the QUAD ESL57 may be the role model for midrange supremacy, butthat's about it. Very few speakers reach this kind oficonic status.TheCA21REX/DT300WG is not an idiosyncratic speaker.It's easy to listen to; gives major insight into themusic, transparent midrange, undistorted treble and theoverall transient attack is simply great. It's arevealing speaker and may leave a few poor recordingsout, but not to a degree where I would call itidiosyncratic. I've pulled out - what I thought was themost difficult recordings - and have been surprised tofind them performing well where a few recordings Ithought wouldn't cause trouble, wasn't so good.Afew weeks later:These speakers have stayed in the living roommuch longer than planned. It appears the CA21REX has someserious burn-in time. For every week passing, they'regetting better and better.
Could I find some suitablefoam surrounds that would make an Fs of 40 Hz, I'd feeltempted to make a final set-up from these drivers. Ithink there's a possibility of getting just a little morebass without spoiling the current smooth response.Yesterday I bought a double-LP, Natalie Cole: 'TakeA Look'. This is one recording all producers shouldhear to learn what a good vocal recording can be.
Brass,bass, drums, woodwinds, piano, etc. All recorded verywell and Natalie's voice never become harsh. Smooth, yetpowerful with a natural sibilance. I wish all Diana Krallrecordings were made this way.The CA21/DT300 very much presents the virtues of a simpletwo-way with a simple crossover. I'm sure the dome +waveguide plays a major role in revealing thesequalities.Measurements. Dispersion measured at 1metre distance.Left: Horizontal dispersion: Red = on-axis, blue= 10°, green = 20° and purple = 30°.Right: Vertical dispersion: Red = on-axis, blue =-10°, green = -20°.There's some roll-off from the tweeter/waveguideat 20°, but basically we have a smooth and evenresponse over a wide listening area.Vertical dispersion is much better thananticipated. The microphone was lowered 10° and20° below reference point.
Below the same isshown from lifting the microphone 10° and 20°above reference point. I'm very pleased withthese results being well in line with mylistening experiences.Left: Vertical dispersion: Red = on-axis, blue = +10°,green = +20°. Right: Step response. Left: Impedance plot ofversion 5 crossover. Two vent tunings are shown.Red = 72 mm (ID) x 50 mm vent.
Blue = 72 mm (ID)x 20 mm (= no tube used).Right: Individual response of drivers fromcrossover plus summed response. Point ofcrossover = 2,300 Hz. The bass response ismerged at 400 Hz with a nearfield measurement.Vent response is not included here., VifaC20WH-07-09Looking at extinct Snell E/II and /IIIspeakers, I came to think about the old Vifa C20, 8'driver. The C20 is found in numerous versions like theC17. The C20 has a lightweight paper cone, a narrow foamsurround and the 'H' provides a 90 mm magnetfor a 1' voice coil, probably giving decentsensitivity.
Googling the C20WH, I found a single shopwhere the C20 was available, probably some old stock andthis is what I found in seller's storage.Really nice looking C20 drivers. Freshfoam surrounds and untinted cones. An additional 90magnet was added to increase sensitivity. When you add anextra magnet it has be to pushed away from the speaker'smagnet.
I'll look at his synthwave sounds and the way he makes them sound. Free synth plugins, cheap DAW software and samples of 80s drum. 'Neon Dream - Massive Retro Presets' explodes out of the 80s and comes hurtling towards the future with 70 blissfully retro, analog-style Synth Presets for the. Presenting THE ONE: 80's Patches FREE, a delicious collection of Free presets. THE ONE: 80's Patches FREE comes with 30 powerful U-He Tyrell N6 presets with a sweet vintage 80's theme. All sounds have been made to sound as fat and dense, analogue, warm, and oldschool as. Step 1: Huge, '80s-style polysynth patches are synonymous with synthwave, so some form of virtual analogue soft synth is a must-have. We'll be using the freeware OB-Xd to create our patch. Load it onto a new channel in your DAW. 80s synth patch.
If the extra magnet is sucked in, it willdecrease magnetic flux in the gap. Strangely enough, ifit's very easy to get the extra magnet in place, itusually only means a small increase in sensitivity. Ifyou really have take special measures to keep the magnetin place, there's usually an significant increase insensitity. I keep the extra magnet in place by tape afteradding a small amount of silicon glue between the twomagnets, and add a clamp overnight.The usual frequency and phase measurementswere done at 1 metre distance to front panel and fileswere imported into LspCAD and modelling could start.As can be seen below, the C20 is an unusual driver. Itcan almost be used without a crossover. Basically flat inall midrange, and had the smooth roll-off started at1500-2000 Hz, it might have run from no crossover at all.But it doesn't.
Any 8' driver mingling with trebleis trouble due to beaming and the sound becomes honky. Avery small inductor, 0.56 mH, bypassed by a 12 ohmsresistor does the job. The 22 uF + 3.3 ohms resistorprovides impedance correction - and a little more.From recent, the DT300WGcrossover was almost given and a 1st order filter couldbe added and fortunately the phase tracking was nice too.Piece of cake! A two-way system, impedance 8 ohms andsensitivity at 95 dB/2.8V. Sound:Compared to the SEAS CA21REXset-up, it is immediately felt that due to thelower Fs of the C20 drivers, 39 Hz, the bass isdeeper.
Dynaudio Raw Drivers For Sale
If you don't see the replacement you are looking for here, please see our page. Advent Speaker ReplacementsPeople often use the to replace the Baby Advent woofers. Allison CD-9 Speaker ReplacementsAllison CD-9: the is a good replacement but you will have to notch the Allison cutouts slightly to fit the wiring terminals. Apogee Speaker ReplacementsApogee CentarusDunlavy Speaker ReplacementsTo match the drivers in your SC- or other model Dunlavy speaker, you would have to remove the drivers from the cabinet and inspect them for size and model number. Then call us at 608-831-3433 or refer to our Dunlavy equivalency found below. We don't have a stock or pre built crossover or schematic for Dunlavy speakers.
Most of these replacement drivers are now discontinued. Buy your replacements now!Dunlavy 100112' Woofer Vifa M30WO-49.Dunlavy 10035' Mid-Bass Vifa P13WG00-08. or Scan-Speak Discovery P13WH00-08.Dunlavy 10047' Mid-Bass M18WO08. but try the.Dunlavy 10086.5' Mid-BassDunlavy 10121' Dome Tweeter D27TG35-06.
which is now the.Dunlavy 10146.5' Shielded Mid-Bass P17SJ00-08. Replace with the unshielded is available.Dunlavy 10294' Cone Midrange M10MD39-08. Replace with the.Dunlavy 10335.5' Shielded Mid-Bass M13SG09-08.
Dynaudio Vw
or Scan-Speak Classic P13WH00-08.Dunlavy 10358' Woofer P21WN20-08. Replace with.Dunlavy 10361' Shielded Dome Tweeter D27SG05-06. Can be repaired with.Dunlavy 104510' Woofer Dynaudio Tweeter ReplacementsOriginal parts are available from Dynaudio dealers. (PDF).D21AF tweeterWe recommend the. You need to use new screw holes.D21/2 tweeterWe recommend the. You need to use new screw holes.D28AF tweeterWe recommend the.
The screw holes are slightly off, you might turn it 180 and use new screw holes.D28/2 tweeterWe recommend the. The screw holes are slightly off, you might turn it 180 and use new screw holes. Dynaudio Woofer ReplacementsSome Dynaudio woofers can have new surrounds installed. Dynaco Speaker ReplacementsDynaco A25 TweeterThe tweeter for this speaker is no longer in production and Seas recommends using their new Sonotex fabric dome, the.Dynaco A25 wooferThe woofer is no longer made in this frame size.
A new verison of this system is now available as the with modern parts. It will not fit the old speaker without some modifications to the cabinet. Hales Speaker ReplacementsHales Transcendence TweetersWe're not sure which models. They used a metal dome tweeter. Original is metal dome and this is textile. It is on the same voice coil chassis.
The Scan-Speak engineer said the textile dome might be slightly louder. Infinity Speaker ReplacementsInfinity Kappa 8.1The is a perfect replacement.Infinity 6' 2-way systemsThe can be used to replace many of the sealed box 6' 2-way Infinity speakers. Check the size carefully. Kef Speaker ReplacementsKef 107 Replacement WoofersWAM Engineering experimented with the as a replacement for the 10” woofers in the Kef 107 speaker.
They said these woofers worked great and would recommend them as a good replacement.Kef T33A ReplacementA good replacement for an 8 ohm Kef T33A is the. The T33A is a 95mm square tweeter and the MDT30S is a 94mm round tweeter. The cut out hole is the same diameter. The MDT30S won’t cover the same physical area as the square T33A tweeter, but it will still fit within the area of a recessed (flush mounted) T33A tweeter. The tweeter will work with the existing crossover and is an acceptable replacement.Kef 104/2 Tweeter RepairThe is often used to replace the tweeter in the Kef 104/2.
The tweeter is not a perfect fit and requires some work. You need to remove the front flange. The voice coil assembly is now exposed.
You need to trim down the plastic rim on the voice coil to get it to fit into the speaker bracket. Scan-Speak Speaker ReplacementsSome woofers can have new surrounds put on. Spica Speaker ReplacementsSpica TC50The Audax tweeters used in this speaker are available again! The new tweeter is the, replacing the old part number of HD100D25. The woofer is the Hif 17JVX 4 ohm and we don't know of any similar speaker to replace this driver.
There is no fix for the woofer that we are aware of. Bad woofer = junk speaker.Spica TC60The is a drop-in replacement tweeter. Thiel AudioThiel CS3.5Original driver was the Scan-Speak 13M/8521. PBN Audio has done some research on a replacement for this speaker. Peter has decided that the Scan-speak 10F/8424G is a perfect replacement. It is smaller than the original midrange, so they have machined a metal adapter plate. It is sold as a.Another suggested replacement with good customer experience recommendation is the.
This unit is 5mm smaller and has slightly lower sensitivity than the 13M/8521.Thiel (CS2.2, CS3.6, etc) speakers that used a Vifa D26AG36-04.The original is a metal dome but we do have a soft dome replacement voice coil that will fit it,. It is on the same voice coil chassis and also 4 ohm impedance. Consider clipping off the protective three pronged grill for best performance and/or if there are dome clearance issues. Vifa Speaker ReplacementsVifa TweetersWith many very popular Vifa tweeters being discontinued, or difficult for us to acquire, here is your best bet for replacements: Aluminum dome Vifa D25AGXX-06 - Von Schweikert Replacementshas upgrades to most of their speakers. Contact them if you want to modernize your current speaker: (760) 410-1650.Von Schweikert VR-3The midrange can be replaced with the.The front tweeter is the Vifa D25AG35-06. Use the.The rear tweeter is the D19TD05-08.
Use the.Von Schweikert VR-4The midrange can be replaced with an.The front tweeter is the Vifa D25AG35-06. Use the.The rear tweeter is the D19TD05-08. Use the.Von Schweikert VR-4.5The midrange can be replaced with an.The front tweeter is the Vifa D25AG35-06. Use the.The rear tweeter is the D25AG-05-06. Use the.Von Schweikert VR-6The midrange can be replaced with an. NOTE: All drivers marked with an asterisk are no longer available from Madisound.