ProSoundWeb Community

Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Subwoofer Forum => Topic started by: Goerge Thomas on November 07, 2012, 12:19:07 pm

Title: How to improve a JBL Mpro 418 ?
Post by: Goerge Thomas on November 07, 2012, 12:19:07 pm
I have 4 of these suckers and power them with a QSC Powerlight 6

I want to improve them, I am amazing with wood working, How can I start?

Would it help to add internal bracing? This is my current thinking that would help.... would that hinder it? Would taking the 4 drivers out and making NEW boxes work better? I don't need them to be so compact and can add me CU feet in a new box with bigger ports if it means I get more output in a front loaded single 18 sub

Adding different porting, eliminating the porting. Anything! I am open to any and ALL ideas. I have 4 good MP418 boxes and 4 good MP418 Drivers and a workshop and 4 months.

Title: Re: How to improve a JBL Mpro 418 ?
Post by: duane massey on November 07, 2012, 09:39:53 pm
Replace everything. There is nothing you can do to make a noticeable difference in the boxes, and you might as well burn them if you remove the drivers. Sell them for whatever you can get, and upgrade. If this is for your own use, and do not have to deal with riders, DIY can be a rewarding journey, but make certain you know what your needs are before you get started. What genre of  music, how much can you handle size/weight, and do you have experience building speaker cabinets? More info needed....
Title: Re: How to improve a JBL Mpro 418 ?
Post by: Paul G. OBrien on November 07, 2012, 11:21:44 pm
There's no getting more output from these drivers in a reflex box, you could get more low end extension with a larger/lower tuned box like the SR4700 series but that comes at the expense of power handling, so there's really no net gain.
Title: Re: How to improve a JBL Mpro 418 ?
Post by: Matt Long on November 20, 2012, 05:22:39 am
I modified a pair of MP415 by taking out the passive crossover and going active. It was a nightmare at first getting the dsp right but once I did there was a decent improvement in the over all output and quality. I didn't really have the option to sell them but if I did I would have.

-Matt
Title: Re: How to improve a JBL Mpro 418 ?
Post by: John Chiara on November 20, 2012, 01:45:12 pm
I have 4 of these suckers and power them with a QSC Powerlight 6

I want to improve them, I am amazing with wood working, How can I start?

Would it help to add internal bracing? This is my current thinking that would help.... would that hinder it? Would taking the 4 drivers out and making NEW boxes work better? I don't need them to be so compact and can add me CU feet in a new box with bigger ports if it means I get more output in a front loaded single 18 sub

Adding different porting, eliminating the porting. Anything! I am open to any and ALL ideas. I have 4 good MP418 boxes and 4 good MP418 Drivers and a workshop and 4 months.

Waves Maxxbass or BCL