CSS FR125S 'fullranger' anything comparable?

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So far: Looking like 5" and up will require too large of Vb or Vc for desktop use. Vas is only considered as a rough indicator of the enclosure size. Xmax ~ one indicator of low frequency capabilities.

dia"[xmax mm, Vas L, Eff dB]

Fostex FF85WK 3"[0.35mm, 1.036L, 86.5dB]
Fostex FF105WK 4"[1.7mm, 4.848L, 88dB]
Fostex FF125K 4.5"[1.65mm, 7.265L, 89dB]

Markaudio CHR70.3 4"[4mm, 5.17L, 85.4dB]
Markaudio Alpair 5.2 3"[3mm, 1.324L, 84.6dB]
Markaudio Alpair 6P.2 3.5"[4mm, 3.6L, 86dB]
Markaudio Pluvia 7 4"[4mm, 5.543L, 86dB]
Markaudio Alpair 10P 6"[7mm, 30L, 89.6dB]

Tang Band W5-2143 5"[2.5mm, 19L, 90dB]
Tang Band W6-2144 6-1/2"[3mm, 34L, 89dB]
Tang Band W5-1611SAF 5"[3mm, 11.5L, 90dB]
Tang Band W3-1878 3"[4.2mm, 3L, 88dB]
Tang Band W4-1879 4"[5mm, 9L, 87dB]
Tang Band W4-1052SD 4"[3.4mm, 7.6L, 87dB]
Tang Band W4-1320SJ 4"[3mm, 5.9L, 89dB]
 
frugal-phile™
Joined 2001
Paid Member
We have used these drivers and put them into (as small as is the smallest we have put them in):

Fostex FF85WK

Optimum 2.5 litre, as small as 2 litre

Fostex FF105WK

5 litre, 3.6 litre

Fostex FF125WK
Markaudio CHR70.3

9 litre, 5 litre

Markaudio Alpair 5.2

2.5 litre

Markaudio Alpair 6.2P

5 litre, 2.5 litre

Markaudio Pluvia 7

11-13 litre, 5 litre

Markaudio Alpair 10P

17 litre, 7litre

Tang Band

Not a lot of experience… mostly loaded into horns.

dave
 
Fostex FF105WK 4"[1.7mm, 4.848L, 88dB]$54.70
Fostex FF125K 4.5"[1.65mm, 7.265L, 89dB]$62.70
Fostex FX120 5"[2mm, 8.21L, 89dB]$144.30


Markaudio CHR-70-Gold Champagne Cone 4"[5mm, 5,17L, 85.4dB]$36.00
Markaudio CHP-70-P Gen2 Natural Paper 4"[4mm, 4.7L, 86.5dB]$36.00
Markaudio Pluvia 7 4"[4mm, 5.543L, 86dB]$45.00
Markaudio Alpair 5.2 3"[3mm, 1.324L, 84.6dB]$53.00
Markaudio Alpair-6M Gold 3.5"[5mm, 4.8L, 5dB]$56.00
Markaudio Alpair-7 Gold Cone 4"[4mm, 4.58L, 85dB]$85.00


Tang Band W5-2143 5"[2.5mm, 19L, 90dB]$51.90
Tang Band W4-1320SJ 4"[3mm, 5.9L, 89dB]$65.80
Tang Band W3-1878 3"[4.2mm, 3L, 88dB]$84.84
Tang Band W4-1879 4"[5mm, 9L, 87dB]$147.50
 
dia"[xmax mm, Vas L, Fs, Eff dB]<$60


Fostex FF105WK 4"[1.7mm, 4.848L, 75Hz, 88dB]$54.70

Markaudio CHR-70-Gold Champagne Cone 4"[5mm, 5,17L, 65Hz, 85.4dB]$36.00
Markaudio CHP-70-P Gen2 Natural Paper 4"[4mm, 4.7L, 72Hz, 86.5dB]$36.00
Markaudio Pluvia 7 4"[4mm, 5.543L, 68Hz, 86dB]$45.00
Markaudio Alpair 5.2 3"[3mm, 1.324L, 101Hz, 84.6dB]$53.00
Markaudio Alpair-6M Gold 3.5"[5mm, 4.8L, 63Hz, 5dB]$56.00

Tang Band W5-2143 5"[2.5mm, 19L, 55Hz, 90dB]$51.90

Peerless TC9FD18-08, 3.5"[2,6mm, 1.24L, 125Hz, 84.5dB]$13 (are you kidding?)


I want low level detail foremost, bass is important also, but planning on a modest near field sub to augment. Don't want listening fatigue in the mids,highs.
 
frugal-phile™
Joined 2001
Paid Member
I can’t recall what the entire acronym is but the MO part is (likely) Metal Oxide.

These drivers are based on a version of A7 or A10 and the metal cone is bombarded by electrons to convert the top few molecules into metal oxide (ie ceramic). The result is a layered cone with less colouration and more detail. An EnABLed A7.3eN comes really close but is not quite as smooth. I now have Chris’ A7 MOAP and Mark is going to send me a reject cone (more cones are rejected than used) to experiment on and i will EnABL the MOAP i have which in should make them even better.

The only picture i could find is attached (A7 MOAP in Frugel-Horn Mk3)

dave
 

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  • MOAP-FH3-6BG4PP.jpg
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frugal-phile™
Joined 2001
Paid Member
Depends on the driver. Metals typically have more top than the papers — i call the paper tops “vintage”. Detail is not missing in the papers, just a different presentation.

A7p is the odd driver out, it does not have the same relation to the metals as the A12/A10/A6.

In the A10/A6 it is a 6 of one, half-dozen of the other. With the A12s the paper is ahead (note: a later more refinedgeneration), The A12pw, IMO, even with top lacking is the better A12. A7p has some resonance issues (not insurmountable) but even when (mostly) cured does not reach up to the same level as the metal A7.3.

dave
 
MAOP = Magnetic Arc Oxidization Process. Was described in great detail by several of Mark Fenlon's posts a few years back . Regrettably most of his very informative posts were lost to posterity.

To quote a post from ScottMoose of a couple of years ago :
Sometimes called plasma electrolytic oxidation. Essentially it converts the surface layer of the substrate into the oxide of the base material. Very interesting process actually. You end up with an extremely hard modified crystalline surface, which has many applications in industry etc. In the case of the driver cones, since we are dealing with resonant systems it alters the behaviour somewhat in terms of the energy transmission & conversion.
As I commented regarding the highlighted above at the time , "somewhat" is quite an understatement. Of course this is likely moot, as production of these models was very limited, and you can't just order them from Madisound, or any other reseller, AFAIK.
 

ICG

Disabled Account
Joined 2007
MAOP = Magnetic Arc Oxidization Process.

Well, there is no such thing as a magnetic arc. Yes, it's called MAOP. But it's MICRO Arc Oxidation Process or Plasma Electrolytic Oxidization. What happens there is the surface of a metal (mostly aluminium) is heated up, 'burnt' by a microscopic small arc of plasma, the metal upper layer oxidizes and becomes ceramic in the process.
 
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