Atlas Sound PD-5VH Drivers. Any input? Any Good For La Scala?

[HudsonValleyNoah]

I guess I said it all in the subject...

Any one got any opinions on them?

Thanks - Noah

[Guest " "]

The K-55 alinco version and the PD5VH are one in the same....atlas makes them for Klipsch.

[Marvel]

BEC says they are the single piece phase plug, and the same as the K-55-X

[HudsonValleyNoah]

K-55, K-55-X and K-55-V...

Could you fellows explain what's what?

[Daddy Dee]

the K-55-V is the one with the push/spring connectors

[Deang]

There is the old, original K-55-V which was used with the Type A, AA, B, B2, E, and E2 networks. The driver has spring loaded terminals and a single port phasing plug. In the late 70's, the K-55-V was redesigned with a two port phasing plug and soldered terminals. This driver only saw production and implementation for a short time. Both of the drivers were Altas PD-5VH. Alnico was getting expensive and companies were moving to ferrite magnets. PK wanted a ferrite version, and both Altas and Electrovoice got a shot at it. The ferrite version by Atlas is the K-51-V and the Electrovoice version is the K-55-M -- which is the driver Klipsch finally adopted for production through the 80's and 90's. The K-55-M was used with the Type AB, AB-2, AL, AL-2, AL-3, AK, AK-2, and AK-3 networks. In the late 90's, Electrovoice quit making the K-55-M (and K-77-M tweeter), leaving Klipsch without a vendor. Heritage production ceased for a while until new drivers could be sourced. Klipsch ended up going back with Altas, and began using the PD-5VH again, which is called the K-55-X -- and is virtually identical to the old, original K-55-V.

[HudsonValleyNoah]

Thanks Dean, I bookmarked that, thank you for the long form explanation! [Y]

[HudsonValleyNoah]

Thanks to DaddyD and Marvel and SF also!