Stay with the heritage of JBL mate it’s the best of the best. Sorry to here about you’re last JBL sub, been running my professional JBL 4645 DIY enclosure with JBL 2241 for 9 years now.
new films always because someday a film will come by and take out the sub! If you feel it isn’t up to the task then turn it down and remember always rehearse before showing off
!!! If you keep it within its workable technical tolerance levels it should play for many years.
I also run a secondary sub bass Eltax A-12 R 12” this is used only for LCRS sub bass extension.
I also run a very cheap but still very much workable audio mixer with 6 channels of input and two stereo outputs. I’m not using it for basic stereo mixing and only using it to channel the following channels.
Channel 1 summed front left and right
Channel 2 centre channel
Channel 3 summed surround left and right
Channel 6 LFE.1
Channels 1 2 and 3 have the pan pot set to left
Channel 6 has the pan pot set to right
Both channels are then feed to each sub bass left output goes to the Eltax A-12 R while right channel goes to the JBL 4645. You wouldn’t be able to tell which is playing unless you know what the film mix sounded like when LFE.1 isn’t present on the mix.
I can monitor any channel just by turning the off switch above the [pan pot] where there is [line] [-20db] and [mic20db] I’ve been running the mixer with set-up now oh, must be 7 years or so.
The VU meters along with the clipping LED on the Alesis RA300 that drives the LFE.1 well I keep the levels with safe operation. I set each fader at a given level via using [sine wave] tone there is also a master fader level so if I thought the low end is too bass heavy I’ll turn it down. Other than that I, don’t want to overwhelm the rest of the films soundtrack.
You could use six channel mixer and still get away without. In other words you can cut corners without the silly expense! You can feed in the following order if you like.
Channel 1 front left
Channel 2 front centre
Channel 3 front right
Channel 4 left surround
Channel 5 right surround
Channel 6 LFE.1
Reason for this is the basic bass manger is PANTS! Unless you have one of the more expensive types TMH Bass Manager thou I think you may need some way of variably adjusting each channel because this as crossover slopes only from what I can see here, its still a good little black box thou.http://www.tmhlabs.com/products/products.html
Anyways just pop out and look in the second hand stores for basic six channel or 8 channel mixer and do some re-plugging and remember to have fun.
Then set the pan pots ether in the centre or pan them to one side, but since you have one sub bass it won’t really matter. Use one of the outputs and balance the tones using single sine wave. I use a 100Hz sine wave on my dts demonstration and set-up disc.
Some films tend to really rumble heavily on the surrounds like in Star Trek III the Search for Spock I tend to turn channel 3 down slightly when running that film, it’s on the Genesis planet where this mostly happens.