Ultimate Large Format JBL System
Hi all, been away for a while. I have a question for you guru's out there.
If space and a good budget up to 10 grand where available, what hybrid 43XX series would you create. For example: 4355 using dual 2245H's or the standard 2235H's.
I very seriously want a description of your ultimate dream system including the component list and type/model of active/passive crossovers including crossover points.
Any and all opinions would be very much appreciated.
Ken
Re: Re: Ultimate Large Format JBL System
Quote:
Originally posted by Giskard
I'd consider allowing the 2202H's to roll off naturally and then add in the dual 2235H's on the bottom as required with a variable active low pass filter.
I have tried both setups with the 250-290Hz crossover on mine. I still haven't finished with my tweaks, but so far I haven't come to a definitive conclusion regarding the crossover between the dual 2235s and the 2202. I definitely prefer the more open sound of not listening to the midrange on up through the active crossover, but when pushed to high SPLs I feel the 2202 may be adding grunge since it is trying to reproduce 20Hz. I have a new active crossover that is very open sounding. I have been enjoying it immensely on another system and will try it on the 4355s soon.
Roll off via constriction
A couple of questions about this:
If the response is rolled off by constriction and there is also a filter, do the rates compound?
A driver rolled off by constriction is still getting its share of power the amp is putting out at those frequencies below the rolloff hinge. Will the voice coil actually heat up more because the energy cannot be dissipated by conversion to mechanical energy? In other words, does the driver have to be able to take the punishment?
This is important to me because I am considering using a pair of Stephens 80FR as bass-mids.
Thanks,
David
Here is a solution for passive high level filters.
I just did a quickie google search and came up with this. It looks like a good starting point.
http://www.t-linespeakers.org/tech/f...ssiveHLxo.html