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I just read that the 4751 is the Euro version of the 4851 on the dbx forums, is this correct?

http://www.jblpro.com/pub/obsolete/4850fam.pdf

ASH6118 is for installed applications. Best if...

Of course those calculations don't account for room acoustics, YMMV. Your house is Victorian era, are the inner walls brick construction?

Also, are there any special instructions for placement of...

2 horns, each 103 dB 1w@1m

18 watts each = 119 dB @1m, 103 dB @ 18.6 ft

The above calc assumes the horns do not benefit from boundary loading and since it is a system, it's response is...

That room shouldn't need B6 tuning, check an online room mode calculator.

Power requirement (assuming B6 filter not used):

2 4645C, each 97db 1w@1m 40-100Hz

Listening position @ 2/3 length...

Try to ID the horns you already have. Hopefully they're the proper 235x series, which are designed for the 2447. See JBL Technical Note, Volume 1, Number 21. ...

Pages load normally-finally! I'm on FF 18.0.1 now, not sure if it was on my end or maybe you guys updated something.

hahaha, YES, I had a feeling that response was coming. Thanks for that link, lots of great info! We mainly used shims for aftermarket diaphragms - which should be avoided at all costs (aftermarket...

Have you tried shimming the diaphragms and/or phase plugs? Phase plugs might need to be deburred, also.

To add- there is a steep learning curve and the documentation isn't always up to date. The following 2x4 configuration doc shows the previous 30 pin "Special Connectors", the current supplied...

Pages load slow, sometimes takes several minutes to fully load. Slower than dailup - very annoying. I'm using fully updated Win 7 and Firefox 17.0.1. Possibly a config problem on my end, but this is...

I use the miniStreamer, 1 miniDigi and 2 2x4 kits with 2.1-Way ADV plugins for a 4-way system (Subs/MB on one board, MF/HF on the other). The 2.1 plugin has subwoofer mono summing, which is why I...