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macaroonie
11-18-2006, 09:23 AM
Does anyone have any experience with this unit in a domestic system ? I am still researching the possibilities for my mini L 300 system and am thinking this may well be the way to go. Since i am proposing to use a 2380 horn the crosover carries onboard compensation tailored for that horn. This seems to me to be a good thing. Anyone have any thoughts. Thanks

Zilch
11-18-2006, 11:20 AM
I've used M552 and M553 in various systems here.

The CD compensation works well with certain horn/driver combinations.

Max VHF XO is 5 kHz, tho, not high enough for the slot, but plenty high for 2407H on 1" PT-F95, OASR, or Engebretson waveguide.

I'm sorry, seems I'm always pitching against the slot. It's just too beamy in the vertical for my preference. Run a slot alone, and it's immediately apparent you either need aiming or listening distance....

macaroonie
11-18-2006, 12:21 PM
Good points well made. Odd that jbl would not provide for a uhf tweet especially one that they made in such volume. I'd be prepared to bet that the range could be extended to 10k with a wee mod internally. Is this a current model, the searches I have made for UK sales dont show much at all. If so what is a typical US $ price.
BTW zilch please pm me your address and the bottle of Scotlands Finest will be yours

Zilch
11-18-2006, 01:37 PM
Manual w/schematic is here:

http://www.jblproservice.com/pdf/M-Series%20Electronics/M553.pdf

M553s get ~US$150 on eBay, sometimes less.

[PM sent.... :) ]

Robh3606
11-18-2006, 03:53 PM
Odd that jbl would not provide for a uhf tweet especially one that they made in such volume. I'd be prepared to bet that the range could be extended to 10k with a wee mod internally.

If you use it in mono mode you highest crossover point is 9K.

Rob:)

Zilch
11-18-2006, 05:18 PM
Pair o' M552s, then.... :D

http://www.jblproservice.com/pdf/M-Series%20Electronics/M552.pdf

They go for more like US$100.

subwoof
11-18-2006, 07:47 PM
I have a pair of 553's and a dual limiter (M712) from an install sitting in my shop. make an offer...

As for mods, find the filter section for that band and divide the cap values by 1/2 to double the xover point - we used to do those mods on the old 525 back in the 80's

:D

sub

macaroonie
11-19-2006, 09:02 AM
PM sent. Thanks :)