Posted by Douglas r. Allen on May 31, 2001 at 00:18:42:
In Reply to: Crossover Points/Power In Small Bi-Amped System posted by MarkW on May 30, 2001 at 13:03:03:
: I have a small club P.A. consisting of:
: 1. Mackie 1604 (old model)
: 2. Aleisis 230 E.Q.
: 3. Behringer Compressor/Limiter (set to limit only)
: 4. Peavey V4X Crossover
: 5. Peavey CS800X (Bridged/Mid-High Cabs)
: 6. QSC USA 1310 (Bridged/Subs)
: 7. Peavey SP2 (1-15 and Horn per cab)
: 8. JBL MR818 (1-18 per cab)
: I have a couple of questions about this setup. Power wise, am I o.k. running theses amps and cabinets in this configuration? Bridged the CS800X into 4 ohms is running about 1200 watts. The Peavey SP2's are rated at 350 watts program. The QSC bridged into 4 ohms is about 2000 watts. The JBL MR818 are rated at around 375 watts program. Would it be better to run stereo out of the amps to the speakers?
: And secondly, where should I set the crossover point from the sub cabs (JBL) to the mid/high cabs (Peavey SP2)? I currently set it at around 250hz. What I've been reading is telling me it should be at around 90-100hz. I connect the speaker cable from the Peavey CS800X to the full range connector on the SP2's. Is this correct for a bi-amped system?
: Also, when setting room e.q., I use a Rane RA27 . With the e.q. I have (Aleisis 230), is this the best way to do it? I notice that most of the time I have to really "pump" the mid freqs almost every place we play. Why is this?
: Thanks for all the help and comments.
Are you using the red binding post when bridging the 800x?( Channel A red for pos. channel b red for neg.) If your using the 1/4 out jacks on the amp then channels a and b are out of polarity so there may be midrange cancelation going on. The sp 2's I have run into seem to be mid-range heavy. Good sounding speaker with that kind of clean power . I'd cross no higher than 120 hz . Maybe later add a secound set of base bins as the 2's will keep up fine with a 218 sub.
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