whuntree

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About whuntree

  • Birthday 01/29/1963

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    whuntree

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    Weipa Queensland, Australia
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    Own & operate a sound & lighting business.
  1. Cool, thanks Kevin.
  2. Unfortunately he won't divulge it…..the vendor cries that someone else he gave the serial number to registered that number & now says he can’t sell the amp…..I still think it’s a bit sus.
  3. Have a look here; http://cgi.ebay.com.au/Crown-XTi-4000-Amp-...=item4aa89f69a5 It looks a bit suspect to me......Is it a genuine Crown amp?
  4. OK thanks, I'll email details. Regards, Rod Thanks Kevin, Jands Australia sent me 4 replacement display boards. The amps are all working fine...at last I can relax a bit....
  5. OK thanks, I'll email details. Regards, Rod
  6. I’m experiencing the following problem more & more with any of my four XTi4000’s. I use the amps in two modes only, Bridge & Stereo (input stereo) with no DSP except for a -3dB limit. After no particular gig using an amp bridge mode, I’ve decided to select Stereo Mode with the inputs as stereo and found only CH1 works (after proving there is signal on both CH1 & 2 inputs). I then tried Stereo Mode with Input Y selected and both channels worked. I then returned the input selection to stereo & both channels continued to work. It seems as though the input selection part doesn’t always work. Last night the same problem occurred with one of the amps & now I can’t get CH2 to work at all……..any one have any ideas?
  7. Hi Guy's I run the sound for a duo doing weddings & birthday party gigs with 2x JBL JRX-118's on one channel (sum total of 2 ohms) of an XTi4000 & 2x JRX-115's on the other (4 ohms) & it punches all night long! I've hooked up the Hiqnet software to the amp to see what temps the amp is running at & found them to be cool as!
  8. A few questions.... 1. What model JRX cab are you using? 2. I thought the BX1800 was a self powered bass guitar amp....is this right?....if not what are the exact specs of the subwoofer?
  9. We can monitor real time temps on each channel. I've set up a custom control panel using gradient meters in HQnet Version 1.5. I don't have it in front of me at the moment so I can't give you any pointers, but it is very easy. PS, there is a firmware glitch when switching the amp from bridge to stereo, only one channel is monitored in bridge mode. Version 1.6 is out now so I expect it's fixed. Regards, Rod.
  10. The DBX 260 is a very powerfull animal.....Get to know it as best as you can...There is an excellent forum here (maybe wait for a bit the guys can get quite busy) or goto http://www.dbxpro.com/forum/ for stacks of DBX Driverack information & the guys are very helpfull with amp set ups & crossovers etc etc. Rod.
  11. OOPPS TYPO sorry, 2x 100watt 8ohm drivers connected in series (-ve of one driver connected to the +ve of the other driver) present a 100watt 16 ohms load to the amp. NOT 200w as per my last post.
  12. Two things we need to clear up. 1 impedance & 2 power ratings. 1. Impedance (ohms) The Gurus will cringe at this statement but it keeps things simple. Driver impedance (ohms) remains the same regardless of their power handling capacity (watts). Examples: 1x 100watt 8ohm driver presents a 100watt 8 ohm load to the amp. 2x 100watt 8ohm drivers connected in parallel (+ve to +ve, -ve to -ve) present a 200watt 4ohms load to the amp. 2x 100watt 8ohm drivers connected in series (-ve of one driver connected to the +ve of the other driver) present a 200watt 16 ohms load to the amp. 2. Power (watts) Power ratings of drivers are advertised in many ways....Peak or Program or Continuous or PMPO or some big number that looks good in a sales pitch. What we are looking for is the continuous rating the driver will handle (8 hrs or more) with no damage. As I said above, Program power is generally accepted in the industry to be 2x the continuous rating (nothing to do with impedance). Your speaker cabinets are rated in Program power as per the specs. Please correct me if I'm wrong, You have 4 cabinets & each cabinet has 1x 8 ohm 120 Program watts (OR 60w continuous) HF driver & 1x 8 ohm 500 Program watts (OR 250w continuous) LF driver in it. Each cabinet has a separate input for each driver (bi-amped). You want to use 2 cabinets for the left side & 2 cabinets for the right side. This is how I would connect them; HF's. Connect the 2 lefthand cabinet HF drivers together in parrallel & connect them to CH1 of the XTi2000. You now have a 120w continuous 4 ohm load presented to each channel of the amp. Do the same to the righthand cabinet HF drivers & connect to CH2 of the XTI2000. Cross-over the amp to suit the driver specs. LF's. Connect the 2 lefthand cabinet LF drivers together in parrallel & connect them to CH1 of the XTi4000. You now have a 500w continuous 4 ohm load presented to each channel of the amp. Do the same to the righthand cabinet LF drivers & connect to CH2 of the XTI4000. Cross-over the amp to suit the driver specs. Hope that is a little clearer Rod.
  13. A general rule of thumb....Size your amp to be a minimum of 2x (twice) the continuous rating of the speaker to be driven. Example; a JBL 2226H (8 ohm) 15" driver is rated at 600w rms continuous (http://www.jblpro.com/pages/pub/components/2226.pdf) so size you amp to deliver 1200w continuous into 8 ohm. Program power could be accepted as twice the continuous power depending on the manufacturer. So, your HF's (http://www.yorkville.com/products.asp?type=29&cat=1&id=3) are 60w continuous each, connected in // (4 ohm) = 120w continuous for the pair multiplied x 2 = 240w amp into 4 ohms would be the minimum required. 1 channel of an XTi1000 is 2.08x. (http://www.crownaudio.com/amp_htm/xti.htm) 1 channel of your XTi 2000 would be 3.3x (800w/240w =3.3) Your LF's would need an amp that would deliver 500w into 4 ohms min based on the above example. 1 channel of your XTi4000 would be 2.4x. (1200x/500=2.4) Configuration: 2xHF's per XTi2000 channel & 2x LF's per XTi4000 channel. Be carefull to set up your gain structure properly. Hope this is clearer than mud! Regards, Rod.
  14. Impatient little bugger aren't I.....sorry about that. Thanks for pursuing the problem. Now I can stop pulling my hair out for a bit. Regards, Rod.
  15. Impatient little bugger aren't I.....sorry about that. Thanks for pursuing the problem. Now I can stop pulling my hair out for a bit. Regards, Rod.