Originally Posted by
pos
If I were you, I would only keep the 4628B and sell the 4699 and 4691 and other cabaret speakers you might have.
The 4628B Is the only one that really has good component and can be converted to hifi use. I would use subwoofer(s) to assist under 80Hz (real subwoofers, not PA speakers from the cabaret serie)
I would discard the current passive filter and go fully active. The M533 is a good unit but a digital crossover like a DCX2496, together with some measurement gears, would give you more possibilities.
Then, you have to change something with the drivers if you want a really good sound, because neither the 2118H nor the 2404H-1 are really good at 3khz.
You have 3 choices:
1- remove the 2118H, close its opening, and put a big horn and compression driver on top of the cabinet. Crossovers could be something like 800Hz and 8khz. The horn could be something like a 2397 if you find one. You will need a big horn to reach 800Hz (the E145 is not that great higher than that)
2- keep the 2118H, and put a small horn on top of the cabinet, with a higher crossover, like 1200Hz and 8khz. A 2307/2308 could do the job. But then you will have a 4 way (plus subwoofers!) and the crossover will be difficult to deal with
3- remove the 2404H-1 (this is the -1 variant anyway: it does not go that high) and replace it by a small horn and compression driver that is able to go to 20khz. That would be the best option in my opinion. A JBL 2407 (or BMS 4540nd) and a the small PT waveguide from the JBL AC16 speaker (PT-B99HF-1). This is going to be a really inexpensive combo (the 2407 can be found on ebay US, and the horn can be had from JBL Pro and is something like 10$ each), and can sound very good. The crossover point with the 2118H would be around 2.5khz, and you would have to use the CD compensation function of the M553 (horn preemphasis)
So in the end that would be: E145 up to around 400Hz, 2118H from 400Hz to 2.5khz, 2407 from 2.5khz up to 20khz with CD compensation. That can be done with the M553, fully active.
Then you just have to add some subwoofers, preferably spread accross the room, and you will have a killer system.