Hey Just wanted to know how much more sound i will need to pump a large venue holding around 500 guests. At the moment my setup for my mobile dj is as follows:

4 JBL JRX 125 speakers
2 Crown xti 2000 amps

I know i will be needing sub woofers but how many and what type. i have been lookin at the Ev T18 subs are they any good and are they worth buying. I would really want to keep all my sound system JBL i have seen some Jbl Jrx 118s sub woofers but they are not that powerful can you reccomend better Jbl subs that are not so expensive but have enough power.

Also I dont know if i will be needing more tops please let me know thanks.

When you say PUMP a venue.. do you mean like Drum and Bass so 500 dancers can feel the earth move.. or 500 guests at a dinner dance / wedding type event with possibly 100 + plus on a dance floor...

if you want JBL to compliment what you have take a look at the MRX518 and 528 bass bins...

or even the SRX bass bins..

where are you located ? if you want a demo of the JBLs you can possibly pop into one of my gigs..