I think that it would be "safer" for you to use your existing amplifiers. Buy another fullrange speaker (whichever you can afford it) and be happy with it. Sell the Visatons or leave them in a box for another time/project.
By the way, which B&W woofer are you using? Any pic?
@goodguys
I described two techniques:
household alu foil and silicone sealant (glue is applied thinly on the foil)
or
thinner foil from the goldsmith and the glue they sell with it in german called "Anlegemilch". (glue is applied on the cone)
The thinner one I use for smaller drivers or whizzer cones.
The B 200 is a high efficiency light weight cone so I would buy the thin foil.
But household foil would do very well, too.
One sided already makes a big difference in sound.
You can do A/ B listening test modifying one driver versus the untweaked one with the balance knob on your preamp.
Here you find pretty much all info:
I described two techniques:
household alu foil and silicone sealant (glue is applied thinly on the foil)
or
thinner foil from the goldsmith and the glue they sell with it in german called "Anlegemilch". (glue is applied on the cone)
The thinner one I use for smaller drivers or whizzer cones.
The B 200 is a high efficiency light weight cone so I would buy the thin foil.
But household foil would do very well, too.
One sided already makes a big difference in sound.
You can do A/ B listening test modifying one driver versus the untweaked one with the balance knob on your preamp.
Here you find pretty much all info:
Vix: Hi. I am using the drivers from an old b&w dm220. They were good speakers in their day.
But it's really the full range drive unit i am interested in, i can change the b&w drivers as i have a ton of drivers from other projects
I need to get the full range unit addressed then decide how much support it needs from other drivers
But it's really the full range drive unit i am interested in, i can change the b&w drivers as i have a ton of drivers from other projects
I need to get the full range unit addressed then decide how much support it needs from other drivers
@Freedom666
I think it is better to get some practice with cheaper speakers. I wouldn't do this modification directly on the B200 if I had no prior experience on this. Also, transconductance amps require some DIY knowledge, how to get them right.
That's why I suggested a purchase of other "more neutral" fullrange drivers.
If he has the means, Moap 10.2 are very good, but expensive. If he wants cheaper, Pluvia 7.2 hd is a good conpromise.
10.3 is a good driver, but has some peak at 7 khz or so which can be annoying.
I solved that by a thin coat of dammar on the membrane, and a transconductance amp, with a bit of filtering...
I think it is better to get some practice with cheaper speakers. I wouldn't do this modification directly on the B200 if I had no prior experience on this. Also, transconductance amps require some DIY knowledge, how to get them right.
That's why I suggested a purchase of other "more neutral" fullrange drivers.
If he has the means, Moap 10.2 are very good, but expensive. If he wants cheaper, Pluvia 7.2 hd is a good conpromise.
10.3 is a good driver, but has some peak at 7 khz or so which can be annoying.
I solved that by a thin coat of dammar on the membrane, and a transconductance amp, with a bit of filtering...
just be prepared for a completely different sound.
Its underestimated that a composite material of metal and paper gets the best from both worlds:
damping from the paper and the tensile strength of the metal adding stiffness.
At the same time resonances are damped giving nice waterfall responses
Its underestimated that a composite material of metal and paper gets the best from both worlds:
damping from the paper and the tensile strength of the metal adding stiffness.
At the same time resonances are damped giving nice waterfall responses
the modern optimized full metal cones must be good although I never listened to one until now.
The diy alu foil trick with already existing paper cones prevented that I buy some Jordan watts alike drivers.
I tried two times full metal cone drivers which looked good from resonance behaviour but the remaining "singing" was annoying so never used them for fullrange puposes.
The diy alu foil trick with already existing paper cones prevented that I buy some Jordan watts alike drivers.
I tried two times full metal cone drivers which looked good from resonance behaviour but the remaining "singing" was annoying so never used them for fullrange puposes.
@goodguys
current driven amplifiers offer reduction in distortion by 10 to 20db(!) compared to classic voltage drive
for fullranges:
EQ for free in highs and lows due to impedance interaction
https://www.current-drive.info/disto/65
https://www.passdiy.com/project/amp...e-amplifiers-and-sensitive-full-range-drivers
current driven amplifiers offer reduction in distortion by 10 to 20db(!) compared to classic voltage drive
for fullranges:
EQ for free in highs and lows due to impedance interaction
https://www.current-drive.info/disto/65
https://www.passdiy.com/project/amp...e-amplifiers-and-sensitive-full-range-drivers
Thanks ! I didn’t get a chance to read the full nelson pass document, it’s above my knowledge. Is Pass saying that transconductance amps make all speakers sound better than when compared to solid state, or is it just full range drive units
Also my quad 909 has an output current of 22 amps, does that help in any way or is the transconductance still better
Which chip amps are transconductance
It is no longer possible to use the Markaudio model ranges to sort drivers into quality,
MAOP 10 > Alpair 10.3, CHP-90 is the descendant of the A10.3. A11ms is different.
Pluvia 11 is not in the same league. P7HD is really good, P7 and P7HD not near as good.
Paper cone drivers are voiced different.
midTweeter size: Smaller will tend to have better top, larger drivers will let you pay louder and cross lower. XO placement should be based on the baffle used.
I’d use MAOP 10 or MAOP 5 (is there still a MAOP 7?)
dave
MAOP 10 > Alpair 10.3, CHP-90 is the descendant of the A10.3. A11ms is different.
Pluvia 11 is not in the same league. P7HD is really good, P7 and P7HD not near as good.
Paper cone drivers are voiced different.
midTweeter size: Smaller will tend to have better top, larger drivers will let you pay louder and cross lower. XO placement should be based on the baffle used.
I’d use MAOP 10 or MAOP 5 (is there still a MAOP 7?)
dave
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An elctrodynamic driver is a current device, so a current amp directly drives the loudsopeaker without an IV conversion, but they are also sensitive tomthe loudspeakers impedance so greater care with loudspeaker matching. If you are biamping many of the impedance issues go away.
dave
dave
@goodguys
i made a real newbie thread on this with the big patience of the pros here for which I am grateful
Nelson used the "simple resistor method" using 22 or 50ohms in line with the speaker to get current drive effect although losing efficiency you can make a listening test the easiest way like this.
series resistance method explained here
https://www.current-drive.info/9
using complex crossovers gives to midrange and tweeters often unknowingly a little bit current drive(!)
i made a real newbie thread on this with the big patience of the pros here for which I am grateful
Nelson used the "simple resistor method" using 22 or 50ohms in line with the speaker to get current drive effect although losing efficiency you can make a listening test the easiest way like this.
series resistance method explained here
https://www.current-drive.info/9
using complex crossovers gives to midrange and tweeters often unknowingly a little bit current drive(!)
@goodguys
impedance linearized multiways could be driven with the sophisticated amplifier from baffles I posted here.
It uses voltage drive in the lows controlling bass driver resonance while offering current drive for the upper frequencies which profit most of this type of amplifier.
Fullranges harmony naturally with current drive amplifiers.
Multi ways can have problems the amp following their impedance curve and deforming the already linear response.
The quad design I don't know. Maybe someone else can give advice here.
impedance linearized multiways could be driven with the sophisticated amplifier from baffles I posted here.
It uses voltage drive in the lows controlling bass driver resonance while offering current drive for the upper frequencies which profit most of this type of amplifier.
Fullranges harmony naturally with current drive amplifiers.
Multi ways can have problems the amp following their impedance curve and deforming the already linear response.
The quad design I don't know. Maybe someone else can give advice here.
Thanks ! I've ordered a pair of the moap 10 from kjf audio, will be arriving on monday i'll let you know what i think of them in open baffle
At the moment i am using a £650 focal ic706v which someone on another forum used as OB and really liked it. I'll replace the focal with the moap and see what happens