Aj72 Posted April 24, 2015 Report Share Posted April 24, 2015 I've put some pictures up of this Proel HPX-6000 (3000 Watts per channel 2Ohm stereo) amplifier (see below) and have now installed it in my system. It has adjustable input sensitivity so I set to 1.0 Vrms (0dBV). I notice an increase in signal strength immediately. I was able to take 10dB off the MIC2200 gain level for this channel as a result. Input Sensitivity (options): 0.775 Vrms (0dBu) / 1.0 Vrms (0dBV) / 32dB (fixed gain) I chose 1.0 Vrms as it is close to what my Crown XLS5000 is (1.25 Vrms, 3600Watts Bridged mode). My JTR 2400 Captivator's are wired for 8ohm so I'm running in bridged mode and the Proel HPX-6000 amplifiers output is 4100Watts in this setting. I know others can hit 126-130dB with dual Captivators wired for 2Ohm. I calibrated my Dual Captivators using a Ratshack meter so they're level matched. I ran the abomination scene from TIH hitting peaks of around 116dB (Ratshack meter again) during heaviest moments. I have discussed in another thread the gain structure issues (causing input signal clipping) I've been having and have received some great advice. I have taken a couple of steps to selling off a couple of components in the signal chain which were redundant and bought a balanced preamp and balanced DSP but am yet to receive those items yet so signal chain is still the same for the moment. The Crown clip lights flicker quite a bit during the heaviest scenes but sounds okay, no distortion. The Proel's clip lights I only just see flicker for the briefest of moments however there is obvious distortion as a result during same demanding parts. This is the first time I've ever heard distortion from one of my Captivators. I will swap each one over to see if there's any difference. Edit: No difference both exhibit exactly the same distortion. Given that I'm only hitting around 116dB (with both Captivators in action) and the Proel amplifier clip lights are barely noticeable at all could it be one of the following. 1. Driver limits have been reached but I wouldn't have thought so? I have had the Caps driven to a 118dB peak before which had no distortion using my Behinger EP4000 and the Crown XLS5000 although the Behringer clip lights were coming on hard and the Crown lights were just flickering. 2. Proel HPX-6000 Power amplifier is the cause not being able to deliver a clean enough signal for demanding material and specs aren't true even though it's rated higher than the XLS5000. Wouldn't clip lights come on harder if this was the case? 3. Complete speculation here but if a certain SPL (e.g 130dB) was achievable in 2Ohm stereo provided there was enough power is it reasonable to expect the same SPL could be achieved in 8Ohm Bridged mode? If someone can tell anything from the photos about the Proel amplifier your feedback would be much appreciated. I will have the new components next week and the clipping should be lessened further as my gain structure/headroom is improved. The Proel amplifier also has an Anti clip limiter which is always active (according to the manual). There is also a soft clipping option which can be activated that smoothly limit the waveform more gently than the Anti Clip limiters. I have the soft clipping activated. I'm also thinking about rewiring the Caps to 2Ohm any reason not to do this? Link to comment Share on other sites More sharing options...
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