thomsurf Posted March 1, 2012 Share Posted March 1, 2012 I have a gig tomorrow but no bass amp. I can borrow one, but thought I might try using my 2 JBL PRX612M speakers (active 12'). I guess I would link them together and use my L.R Baggs Venue as pre amp. Anything I should be aware of? Thnks Yamaha CP88, EV zxa1 Link to comment Share on other sites More sharing options...
MoodyBluesKeys Posted March 1, 2012 Share Posted March 1, 2012 I have used one of my JBL EON 15G2 cabinets for bass before - but the JBL is 15" woofer. Worked fine with the active electronics bass (which provided tonal control). With the passive bass, I'd need a preamp for tone shaping - but you already have that. Your JBL's are listed with a frequency response of 50Hz upward, so real low bass probably won't be as lively as something designed for bass. I'd think the main thing to be aware of is that in a large venue or with a very loud band, you may not have enough sound - and pushing it up too much will likely cause the JBL to go into self-protect mode (My 10" JBLs would do that when gigging - all of a sudden the protection would just kill the volume - the QSC K10's I use now have a higher threshold - mind, these are for keyboard. I still have a Trace Elliot amp and pair of Trace cabs for bass. Howard Grand|Hamm SK1-73|Kurz PC2|PC2X|PC3|PC3X|PC361; QSC K10's HP DAW|Epi Les Paul & LP 5-str bass|iPad mini2 "Now faith is the substance of things hoped for, the evidence of things not seen." Jim Link to comment Share on other sites More sharing options...
rumpelstiltskin. Posted March 1, 2012 Share Posted March 1, 2012 do it. you probably won't lack low end with a pair of PRX12s. they're on a different level from the EONs, especially the old EONs. it won't sound much like a bass amp, though. it will be much more accurate. but they'll totally work. make sure you report back after the gig about what you liked and didn't like about this experiment. because i like people. Link to comment Share on other sites More sharing options...
Cthulhu Fhtagn Posted March 1, 2012 Share Posted March 1, 2012 I run my upright through a Shure 52 Beta, through my Yami 312 Powered board and a pair of JBL JRX115s The Eurosonics keep me from sounding too much like me and since I really don't spend a lot of time under G and my keys has learned to turn the bass arranger off, I'm not in a dogfight for low end. The set up works well enough for the jazz band; I would really hate to try it with Project Geezer. Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn Link to comment Share on other sites More sharing options...
thomsurf Posted March 3, 2012 Author Share Posted March 3, 2012 Thanks for your comments guys. My setup worked ok, but I was definetely missing some lows and I wasn't quite able to follow the two other guys volume wise. I had some distortion when I pushing it. It was 75-100 people venue with high ceilings. I wouldn't go with this solution again but for smaller coffee house style gigs or rehearsal it would work just fine. Yamaha CP88, EV zxa1 Link to comment Share on other sites More sharing options...
rumpelstiltskin. Posted March 5, 2012 Share Posted March 5, 2012 i'm surprised the pair didn't have enough low end. maybe i prefer less than you. thanks for closing the loop. it's good to hear some practical reports after so much theoretical discussion. because i like people. Link to comment Share on other sites More sharing options...
SmittyG Posted March 7, 2012 Share Posted March 7, 2012 This was very useful to me as I'm shopping for a second bass amp (my main rig stays in the band trailer) and had started thinking of going with a powered speaker instead. When I do my solo bass shows, I could run my different line outs from my effects chain to a mixer and then go to the speaker/s. Samson has this cool 400W unit I was thinking about. Now I'm thinking I might need to look at this some more. Thanks for the feedback. The groove is in the spaces. Link to comment Share on other sites More sharing options...
rumpelstiltskin. Posted March 7, 2012 Share Posted March 7, 2012 just make sure the syatem can produce enough low end. audition it first before buying gigging with it. because i like people. Link to comment Share on other sites More sharing options...
thomsurf Posted March 7, 2012 Author Share Posted March 7, 2012 When thinking back on the gig, I did have amazing power in the lower mid/mid/high ranges. I could probably have eq'ed these down to get a more balanced sound, but still the deep bass would be missing. I wonder if the result would have been better if I had used xlr cables for both linking the two speakers and from the preamp... Yamaha CP88, EV zxa1 Link to comment Share on other sites More sharing options...
Paul K Posted March 7, 2012 Share Posted March 7, 2012 I don't think XLR's would have helped since it was a short cable run. I'd fire it up again in the garage and play with the EQ some if you intend on using this setup again. Are you using a low B string? Things are just the way they are, and they're only going to get worse. Link to comment Share on other sites More sharing options...
WCriley Posted March 7, 2012 Share Posted March 7, 2012 With some gear, using an unbalanced cable will cause a 6dB drop in the signal, resulting in 1/4 the output power. Since low frequencies require much more power than mids and highs, this could have been the problem. Link to comment Share on other sites More sharing options...
SmittyG Posted March 10, 2012 Share Posted March 10, 2012 Of course, now that I'm looking at the details of the conversation, I might not have the issues described here. I'm not an uber-lows kind of guy; I tend to roll off anything below 40Hz even in my bass rigs. The groove is in the spaces. Link to comment Share on other sites More sharing options...
picker Posted March 11, 2012 Share Posted March 11, 2012 I knew a guy who used an EV Biamp to push an old EV Eliminator PA cabinet. That set-up kicked like a mule, surprising because of the relatively low output of the Biamp. Always remember that you are unique. Just like everyone else. Link to comment Share on other sites More sharing options...
jeremy c Posted March 11, 2012 Share Posted March 11, 2012 I remember those cabs. They were great. Free download of my cd!. Link to comment Share on other sites More sharing options...
thomsurf Posted March 11, 2012 Author Share Posted March 11, 2012 I don't think XLR's would have helped since it was a short cable run. I'd fire it up again in the garage and play with the EQ some if you intend on using this setup again. Are you using a low B string? No low B string... Yamaha CP88, EV zxa1 Link to comment Share on other sites More sharing options...
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