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Radian 950PB NEO mounted on 340hz JMLC horn (measured at 3")

The Radian 950PB NEO is a 10 pounds  beast. I’ve been considering getting a pair for some time now.

 

Some reviews suggest it beat out the TAD4001, while others say it's 95% of the TAD at 1/3 the price :)

Not sure who's right, as I don’t have the TAD4001 to compare...

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Having the regular aluminum alloy dome, ithe 950PB doesn't reach 20 kHz, but I intend to cut it to a dedicated HF unit anyway. The expensive Beryllium upgrade option is wasted here as the 340 Hz JMLC horn starts beaming at HF, and a dedicated tweeter works way better anyway IMHO.

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For my projected application, on the big 340hz JMLC horn, the 950PB does support the ~500 Hz crossover point I use, much better than the smaller 760PB does. 

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At the top, I'll use a bullet super tweeter (~6.5 kHz ) or the Celestion CDX1-1425 (4 kHz – 5 kHz)

Sound integration will define my final selection. 

With the previous 760PB in place, the bullet Beyma CP22 won subjectively, using the 6 kHz point.

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I'm also eyeing the small 0.63" BMS 4526ND unit for upgrading the Celestion. I’ll need to investigate the pricing though.

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The measurements shown here are with the back cover in place and no felt added in the back cover. (ie: stock item)

I intend to use it without the rear cover as well, once my new system is running.

JMLC high efficency system

Late June 2018 system. 

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This temporary set up was last one used in my Trenton,Ontario house.

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Movers arrived and packed everything up on July 12th.

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  • Dual fane 15XS bass (ports sealed with foam)

  • 950PB on 340hz Azura horn

  • CDX1-1425 on STH100 horn

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  • All Krell Showcase 7 driven

  • via MiniDSP 4x10hd, all active crossover

  • PC, older laptop using JRivers 23 as source

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No subwoofer used and all acoustic treatments were removed.

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I must say it was a decent set-up despite big acoustic problems.

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The little B&C 8PE21 in sealed configuration I was testing and compared to the 950PB/horn combo wasn’t able to compete with the 950PB’s sheer dynamics and detail.

Is this a surprise? 

  • 8PE21 for sale :)

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Kidding, I plan on a DIY front horn for the 8PE21 someday.

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January 2019

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My favorite set-up is no rear cover on the 950PB, here a comparison of both set-up.

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  • No rear cover (RED)

  • Rear cover in place (Green)

  • No EQ whatsoever!

  • Microphone positioned at ~3" from horn mouth.

  • Used close SPL matching

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The measurements speak for themselves.

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