Does this kit exist?

[motokok]

I'm working on a detailed write-up on the SS D7608. Not a forgiving driver. There are a lot of little details you need to address if you want to make it sing, especially if higher spls are expected from it.

Woo, fanastico, thanks @profiguy! I'd be interested about the chambering; I remember you showed some photos with Home Depot endcaps, but I wonder can the same be done with standard MDF/wood like this Spendor teardown

 

[Azrael]

Dynaudio stopped supplying drivers to diyers about 20 years ago.

There is an alternative source for 3-inch dome midrange drivers from Dynaudio: just look in their car audio section:

Dynaudio Esotec MD 142

Kind regards,
Michael

 

[profiguy]

Two problems with the MD142 are low sensitivity (2.83v @ 4 ohms) and a small back chamber giving it higher Fs. Its designed for car ausio use, so compromises are made for this application. I'd use the Dynaudio mids that came in some older Volvos, which are more suited for home audio IMO.

 

[andy19191]

Not sure why you would look on the Sennheiser site to find a Neumann spare part.

Neumann is part of the Sennheiser Group who look after the distribution and spare parts here in the UK and own the factory in Ireland that manufactures Neumann monitors along with Sennheiser headphones.

Neumann monitors (formerly Klein&Hummel) simply cancelled their top of the range model which used the ATC mid. I think they use the ScanSpeak D7608 in a waveguide in their remaining 3way monitor.

They use their own design as can be seen from SPL and distortion measurements, photos and statements to that effect. Don't know whether it is built in Ireland or elsewhere. Despite the size the performance is well above that of the ScanSpeak and close to that of the ATC.

As far as I know PMC never did use the Volt. They started out using the ATC and when they cut off supply designed and manufactured their own.

If it was a new design why would it look exactly like the Volt? It seems more likely to me that it is a derivative of the Volt design assembled at PMC. But I don't know. Anyone?

 

[profiguy]

@motokok - you could use all sorts of back clambering methods, as long as the volume and inner geometry don't cause any acoustical issues. I prefer the end caps because they sound more acoustically inert to my ears.

 

[profiguy]

I owned a pair of PMC IB1s which used the SS D7608 / Vifa M75-41 mid dome. I purchased them used with one blown mid. The D7608 was an exact match, but I repaced both mids due to their age. Comparing the sound of the repaired speaker to the original one showed there was no difference between the factory mid and the D7608. They also looked identical.

 

[beammeupscotchy]

Appreciate all the input so far. Great community here.

I'm liking the specs and price of the Scanspeak.

How well would these pair with this tweeter?

https://www.proaudiosolutions.com/Dynaudio-81623-p/81623.htm

 

[dtaylo3]

https://www.madisoundspeakerstore.com/approx-2-midrange/morel-tm4055-8-tweeter-midrange/

Morel all in one mid dome and tweeter unit.

 

[profiguy]

Take a look at these screen shots from a Jean Maurer speaker assembly video. Recognize the mid in these images? Yes, a variant of the Scanspeak D7608.