rickrock

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  1. Okay, maybe we're getting somewhere. I will check to see if it's there without any input. I have not field tested the system, this post is all based on first basement wire up and test--but I've run this system many times live but with a different mid amp (the 8200 referred to) But the d/a to a/d etc. makes sense. Here's the question. The DSP in the Xti can be turned off, but then, how do you get the thing bridged? 5023[/snapback] The DSP cannot be shut off as it is an integrated part of the amplifier. You can turn on and off functions but the DSP is always in line. "DSP OFF" just means there are no DSP functions engaged. 5028[/snapback] I'm pretty sure my noise problem was a ground issue. I've been able to get things working well now. rickrock
  2. Okay, maybe we're getting somewhere. I will check to see if it's there without any input. I have not field tested the system, this post is all based on first basement wire up and test--but I've run this system many times live but with a different mid amp (the 8200 referred to) But the d/a to a/d etc. makes sense. Here's the question. The DSP in the Xti can be turned off, but then, how do you get the thing bridged?
  3. I couldn't get my banana plugs in the binding posts, and found the holes in the top, so I used those, but this doesn't seem right. Then I found the part of the manual that said the plugs are there in European models. so Europeans wouldn't plug in power cords by accident. So, do I have European models? And should I send them back and get some made for the good ol' USA? Or are these amps really the same thing, but for these stupid plugs? much obliged rickrock
  4. Is the 1% THD that is stated on all the data sheets significantly audible? I'm pretty disappointed with what I've heard so far. I'm bridging two xti 2000's into two new jbl srx 722 cabinets (2 x 12" and a horn in each). I'm also biamping them, so in addition to the xti's into the 12's, I have a separate amp for each horn driver (two little d-75's). I'm using a driverack pa model dsp, and I've programmed everything according to the jbl website on the PEQ and crossover. The xti's just seem very noisy compared to what I used previously (a crest pro8200, I didn't want the crest because of its 30 amp plug and my concern that we'd blow breakers in the small venues we play, and I liked the low power draw shown in the specs for these Xti models). Each of the the dual 12" cabinets is 4 ohms, so each of the bridged xti 2000's is supposed to be putting out 2000 watts into those 4 ohms, but GEEZ, the noise floor is upsetting. Is that what 1% THD sounds like? I'm thinking of putting these amps on the subs and just using my ce4000 (which I was bridging mono into two connected single 18" subs) in stereo on the mid speakers (giving me 1200w in stereo, just meeting the program power, but not really giving them the overpower I'd like with the 2000w I'd get from the xti's, but the ce4000 has only 0.5% THD). But that's not why I bought them, I'm happy with the ce4000 as a sub amp, I wanted this to be a good mid amp. Bottom line, I just want to cut down the noise in the more audible midrange speakers. Both new amps are right out of the box, and both have exactly the same noise issue, and both are born in November 2006. Is there something I can do about t his other than get used to it?
  5. I want to bridge my two d-75's to get 95w per side into my high box horns, (either a srx715 or 722 horn, I'm still deciding). The jbl settings for my drive rack show that the polarity must be reversed for the horn if you biamp, and the driverack PA model has no parameter for this, so it seems I'll need to flip the banana plug. Simple enough, but which side of the amp is the hot side when it is bridged? A picture in the manual shows that whenyou bridge the amp, you put the plug in right side up (with the cord coming out the bottom half of the plug). That must mean that the hot side is the right red binding post, so I would flip it upside down to reverse the polarity. Have I got this right? rickrock