High Efficiency Speaker Asylum

Variance in compression driver 1 3/8" threads ?

75.109.229.84

freddyi

I've got a PRV 250ph - it mucked up the first few threads on my Cobraflex and will not tighten down on a several other horns - it does work with a K700. Selenium's D250 Trio will tighten down on the Cobraflex.

anyone else find that some 1 3/9" drivers just won't work on a lot of horns?
Karlson Evangelist

Follow Ups:

Celestion - djk 13:42:05 10/11/16 (2)
Some of the Celestion drivers have such short threaded sections they will not work on some horns (leaves a cavity at the throat).

Many drivers have 0.7" exits, causing distortion below 1Khz under higher power.

EV 1829 has a 1.2" throat.
- RE: Celestion - freddyi 21:28:00 10/11/16 (1)
  I could not get the PRV 250ph to thread on the Cobraflex, an adapter, nor one Gollehon horn. I put a lot of torque trying to get it on the Cobraflex and it did not want to come off - ruined the first 2 or 3 threads.
  seems like I saw some cheap diaphragms on Ebay which would fit 1823 - ah
  'phragms for some EV CD
  Karlson Evangelist
  
  Edits: 10/11/16
  - I recognize that ad - Alpha Al 13:18:52 10/12/16 (0)
    I listed it.

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