jon.pittman

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About jon.pittman

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  1. I have a pair of the MRX518S subs and am powering them with an XTI-4000 -- i.e., the same rig you're looking at. They are the bottom end of a small 2-way system (tops are a pair of MRX-512M, also powered by a single XTi-4000). I run stereo, with one speaker on each side of the XTi-4000. I use it for our band's rehearsal space (where its' complete overkill) and small gigs (where is has rocked). My four-piece band (vox/keys, guitar, bass and drums) runs everything through the PA -- vocals, guitars (miked), keyboards (direct), bass (direct box) and drums (usually just kick and snare, with a vocal overhead picking up everything else). I could not be happier. The subs are lightweight and very easy to move (as are the tops, which I highly recommend). My amp rack has the 2 XTI-4000s and a single XTI-1000 that runs four monitors). I use an external cross-over/DSP and cross over the subs at about 125Hz. I've only used it in small venues, but I've always had more than enough rig for the gig. In short, if you go this route, I don't think you'll be disappointed. One think I invested in was a set of Tuki covers (tukicovers.com) for the speakers -- if you're going to be moving them around, Tuki or similar covers will protect them.
  2. I have essentially the same speakers, except that I have the MRX 512Ms for tops, rather than the MRX515. I think that both the 515 and the 512 take the same power, which I believe is program rated for up to 800 W (1600 peak). I use 2 XTi 4000s -- one for the subs (one sub per channel) and one for the tops (one 512 per channel). The 518 subs are 4 ohm cabinets, so they get 1200 W each from the Xti 4000. The 515 and 512 are 8 ohm cabs, so each one would get 650W from one side of an XTi 4000 if you're running stereo. If you're running a stereo mix, I'd recommend swapping the 2000 for another 4000 for the tops. If you're running the tops mono and bridging the 2000 to run both speakers, each one is seeing 1000W, which is more than enough.
  3. I power a pair of MRX512M, which I use as tops, not monitors, with an XTi-4000. These are on top of a pair of MRX518s, which are also powered (stereo) with another XTi-4000. The MRX512s are also 800W RMS speakers, but I haven't had any problems feeding them only 650W. Although I don't really need to crank them, since I wuse them in small rooms.
  4. Is it possible that you're not "enabling" the EQ in SA? I don't have the software on this computer, but if I recall correctly, there's a button you need to push in the SA software to "enable" the EQ for each channel, sort of like a "bypass" button on a graphic EQ. I think the default in SA is not "enabled." Merely adjusting the frequency response won't have any effect unless the EQ is enabled, just like moving the sliders on a graphic EQ will have no effect if the unit is bypassed. Again, just a thought -- this is the sort of "duh" thing that I routinely overlook.
  5. I bought two of these (I think -- they are marked with a "C" suffix). These were sold as refurbished, and at a significant discount. I've updated the firmware, and have had no issues. So far, the savings have been worth it.
  6. Also, the XTi fans do not to come on at all until the amp gets pretty hot (I think over 50 degrees C). With the latest firmware, you can also set the fans to come on at a higher temperature or a lower temperature. There's a discussion in a post D. Glass made recently about this.
  7. Well, I opened up the case. The ribbon connector was not obviously loose, but I pushed it in just to make sure. That seems to have done the trick -- the pot now works as it should. Should I still take/send it in?
  8. I have an XTi-1000 that I use for monitors. I'm running 2 monitors off of each side. I've "Y'd" the input, since all the monitors get a single signal. I find that there is volume even when I turn the Channel 1 attenuator all the way down. Raising it makes a little difference, but no much. Then I tapped the knob gently, and the volume jumped. Is this a bad pot or ribbon cable? It's still under warranty, but would it void the warranty if I open it up and try to reseat the ribbon cable, since I'd like to get this working ASAP? This problem occurs whether I "Y" the input or turn off the DSP. The Channel 2 attentuator works just fine. Jon
  9. The JRX 125 are 4 ohm cabinets. Each channel of the XLS-602D puts out 600 watts at 4 ohms (380 watts at 8 ohms). The speaker is rated at 500W RMS/1000W program and 2000W peak. Power should be at least 500W, but 1000W is better. So the XLS-602D will be fine, if you attach one speaker to each channel of the amp. The reason more power is better is that if you really want to get loud, you run the risk of cranking up the signal (volume) on your mixer (or whatever you're feeding into the amp) in order to get the sound level you want, and can cause th amp to overdrive or clip. This will damage the speakers. Ironically, underpowering the speakers can be just as bad as giving them too much juice. But you should be fine with the XLS-602D, as long as you don't clip the amp. As for connections, the output on the amp is Speakon or banana plug. Go with the Speakon, it won't pull out, like the banana plugs can. At the speaker end, you can use 1/4 or Speakon, but I'd go with Speakon for the same reason.
  10. Based on the above, it sounds like the computer is not seeing the amp as a new USB hardware device. I'm not sure how to make it do this. I've now updated System Architect to version 1.5 and updated the firmware for the amps to 1.1.4.1. The amps show up in the Windows device manager as HID devices, and Windows says they are working. The USB Device shows up in System Architect as VID: 45624 PID 2048 Ver: 256. However, I still can't connect through the laptop (I can connect through a desktop). In the event log, I get the following warning: DateTime: 2007-09-08 21:15:18.02 Address: 12633 Type: Warning Category: Device Priority: Low Name: USB.SendMessageToDevice Details: (vnd=4624,prd=2048)=1784[DeviceListChangedHandler.m_oHIDClient.SendMessageToDevice] I'd appreciate any help. Thanks. David -- can you help me with the error code? If I unplug the amps from the USB cable, the errors stop -- it looks like the software is aware that the amps are plugged into the computer, but can't communicate with them.
  11. Based on the above, it sounds like the computer is not seeing the amp as a new USB hardware device. I'm not sure how to make it do this. I've now updated System Architect to version 1.5 and updated the firmware for the amps to 1.1.4.1. The amps show up in the Windows device manager as HID devices, and Windows says they are working. The USB Device shows up in System Architect as VID: 45624 PID 2048 Ver: 256. However, I still can't connect through the laptop (I can connect through a desktop). In the event log, I get the following warning: DateTime: 2007-09-08 21:15:18.02 Address: 12633 Type: Warning Category: Device Priority: Low Name: USB.SendMessageToDevice Details: (vnd=4624,prd=2048)=1784[DeviceListChangedHandler.m_oHIDClient.SendMessageToDevice] I'd appreciate any help. Thanks.
  12. Based on the above, it sounds like the computer is not seeing the amp as a new USB hardware device. I'm not sure how to make it do this.
  13. I had the same thought, but the ports work fine for other devices (jump drive).
  14. I posted this in the IQ Network discussion, and maybe it should go here. If not, I apologize in advance. I've got 3 XTi amps -- 3 4000s and a 1000. I've downloaded SA, and it runs fine on my desktop, and I can access the amps easily, and have set up EQ, presets, etc. I've also installed SA on my laptop, and it won't find the amps no matter what I do. I keep getting error messages in the event log. I've uninstalled and reinstalled SA several times, and I still get the same error messages. It seems like there is something simple I'm missing, but I can't figure out out. I'd appreciate any help. P.S. I've tried using a powered hub, and only plugging in one amp at a time, on the theory that the USB bus on the laptop doesn't provide as much power as the USA bus on the desktop, but I get the same result -- no connection. Jon