Beyma TPL 150 or Raal Lazy Ribbon

[JonBocani]

I had the Radian 950PB ( not Be ), and it is a very fine driver.
But i was not able to get rid of coloration.
Not with the Radian, and not with any other CD driver.
And neither with fatigue after 15 min listening.

Felt exactly the same before.

Solutions:

1. Hornless
2. Crossed not higher than 4-4.5khz at steep slope.

Both were a revelation for me last year. If you still can't stand the sound it produce at 4-4.5khz, then just try lower. Anyway, the real ''fun'' with the 950PB is between 450-1.5khz, IMO. This is were he really stands apart from 99.9% of the other drivers.

 

[angeloitacare]

Felt exactly the same before.

Solutions:

1. Hornless
2. Crossed not higher than 4-4.5khz at steep slope.

Both were a revelation for me last year. If you still can't stand the sound it produce at 4-4.5khz, then just try lower. Anyway, the real ''fun'' with the 950PB is between 450-1.5khz, IMO. This is were he really stands apart from 99.9% of the other drivers.

You get 450hz from it without a horn ?

 

[pieter t]

Radian recommends an 800 Hz crossover frequency (horn loaded!).
The free air impedance peaks start at about 400 Hz, with some further peaks at higher frequencies.
These peaks are damped in a horn, but not when used hornless.
Apparently that's giving a sound to Jon's taste.

 

[JonBocani]

http://www.diyaudio.com/forums/multi-way/300628-official-hornless-compression-driver-thread.html

Well, according to everyone that heard the result, it works really well.

... and that's in a system that have seen ATC dome, Seas exotic F8 and Voxativ AC-1.6 midranges just before...

I'm crossed at exactly 440hz at this very moment, 300db/oct linear phase. Up to 1.7khz-5.8khz depending on the tweeter i'm playing with at the moment (usually 3.8khz).

Moderate EQ in the 450-600hz region, but a bigger -EQ correction in the natural peak of the driver (1.2khz-2khz).

Hyper resolution, extreme precision, awesome ''attack'' in the lower range (400-800hz) that makes appear the whole bass ''faster''... All in all, i'm more than happy i'm downright impressed.
I had some great results also with the Seas Exotic in the lower range, but not as powerful as the Radian 950PBbe.

Also tried the Radian 760NEO factory equipped with 7mil shims, but wasnt delivering the same feeling at all. Can't ''EQ cheat'' it as the 950 so it ended useable only from 900hz or so , which is not at all as impressive.

So far, the 950PB is pretty much alone in delivering that kind of performance. But i'd be very very curious to try the big BMS.

 

[JonBocani]

If i were to slice the octaves i liked the most from the most impressive HF transducers i heard in my life:

350hz@700hz with the Seas Exotic F8
440hz@880hz with the Radian 950PBbe
10khz@20khz with the RAAL 210-10D
600hz@2.4khz with the Voxativ AC-1.6

 

[anubisgrau]

Among the findings in the cellar, there is Fane 8M Studio mid driver. I bought it long time ago to play in a horn, however right now I am trying to knock an OB line of drivers. Is anyone aware if this driver is usable on a baffle or its glory shines only in the horn. I remember Fane used to publish completely wrong T/S parameters so not sure if there is enough of data for any credible conclusions. Basically the question is if it would bring anything substantial over Audax PR170M0. If it could cover 200 to 2k instead of 400 to 2k, that would be different pair of shoes.