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  • Peavey IPR - Whats the Latest News?

    Time for ChinoSound to Buy a pair of Amps, thinking IPR2 5000's to Run some JBL728 Subs. Little strong, but Like the ability to Run a pair on an Amp if necessary.

    Thoughts on the reliability of these at this point? I've been using tried & True QSC PLX3402's, but two of them are REALLY long in the tooth. They will be run of festival Power - diesel & Gas generators often.

    I remember the IPR's having issues with shutoff due to a grounding Issue, and Some problematic stuff, and poor service. These issue been remedied?

    Best

    Todd A.


  • #2
    Originally posted by ToddAnisman View Post
    Time for ChinoSound to Buy a pair of Amps, thinking IPR2 5000's to Run some JBL728 Subs. Little strong, but Like the ability to Run a pair on an Amp if necessary.
    I'd consider the 755 watts per driver that amp will supply to a pair of 728's quite OK without additional limiting as long as you have a proper HPF upstream . OTOH I'd not GAS out and buy them if I already had the PLX3402's - you only gain 1.4 dB (unless you buy into the "PLX suck on subs" thing).
    Last edited by RoadRanger; 05-11-2014, 09:19 AM.

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    • #3
      Todd, I may be interested in some aging 3402's...
      -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Former product development engineer: Genz Benz, a KMC Music/FMIC/JAM Industries Company, continuing factory level product support and service for Genz Benz

      Currently product development engineer: Mesa Boogie

      Comment


      • #4
        RR - More of a "These amps have been ridden hard and put away Wet" kinda scenario, which is also why I'd not sell em - 7 Burns on em, hundreds of outdoor shows….

        I think the 3402's are great on the 728's… but I also have 6 of them, 4 725's, and 2 722's… that come sot having 6 of them.. and I have only 4… use a borrowed QSC EX4000, and a PL1.8 on the 722's. SO thus the desire to have a few more amps.

        Todd

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        • #5
          I have 7 of the IPR's , 4-1600's and 3-3000's. I had an odd problem with two of the 3000's where they shut down and required repair. The issue was related to running my speakons adjacent to my snake for a distance. Something about the topography of those amps that makes that a bad thing to do. Peavey repaired them quickly and free even though they were past warranty.

          A&H GL2800 console, BagEnd Crystals over D-18's, 12"and 15" BagEnd and EAW wedges powered and processed by QSC, Klark, BSS, Symetrix, Valley, Sabine, Peavey and BagEnd INFRA.

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          • #6
            Sounds odd? Any more details about that?
            Don Boomer

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            • #7
              That was the explanation Peavey had for the failures?


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              • #8
                An issue with class d amps in general is that the carrier leakage back into the input due to routing of an output close to the output over an extended length. The carrier residual couples into the input due to capacitive coupling so the inputs must be very very resistant to carrier residual. This means careful filtering and ground current routing to prevent contamination. One of class d's soft white under bellies.
                -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                Former product development engineer: Genz Benz, a KMC Music/FMIC/JAM Industries Company, continuing factory level product support and service for Genz Benz

                Currently product development engineer: Mesa Boogie

                Comment


                • #9
                  Tomm - This is one of the issues i heard about - and I assume these are the Version 1 3000's?
                  Aged - any reason to think this is a continued issue in the IPR2? whats your take? I could stick with a tried & True PLX,. don't think I would be worse for wear, hard to find softly used amps of those ilk these days.

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                  • #10
                    I wouldn't expect there to be any problems with the new IPRs
                    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                    Former product development engineer: Genz Benz, a KMC Music/FMIC/JAM Industries Company, continuing factory level product support and service for Genz Benz

                    Currently product development engineer: Mesa Boogie

                    Comment


                    • #11
                      Yes these were the original series IPR. I don't know if Peaveys repair addressed the issue or simply replaced bad parts to original specs. Regardless, other than that issue, I've put quite a few miles on them and like them. Just don't run the speaker cables alongside your snake!!

                      A&H GL2800 console, BagEnd Crystals over D-18's, 12"and 15" BagEnd and EAW wedges powered and processed by QSC, Klark, BSS, Symetrix, Valley, Sabine, Peavey and BagEnd INFRA.

                      Comment


                      • #12
                        Originally posted by Tomm Williams View Post
                        Yes these were the original series IPR. I don't know if Peaveys repair addressed the issue or simply replaced bad parts to original specs. Regardless, other than that issue, I've put quite a few miles on them and like them. Just don't run the speaker cables alongside your snake!!
                        Correct, running speaker lines parallel to mic lines over an extended distance is bad practice in general, worse in the case of class d due to the relative ease of carrier coupling and since the carrier contains some audio information the mic pres must have exceptional rfi filtering as rejection isn't happening at carrier frequencies.
                        -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                        Former product development engineer: Genz Benz, a KMC Music/FMIC/JAM Industries Company, continuing factory level product support and service for Genz Benz

                        Currently product development engineer: Mesa Boogie

                        Comment


                        • #13
                          It seems that this condition is not widely known, I don't know when it was "discovered". It would be a good thing for it to be common knowledge at a basic level. I'm avoiding it regardless of amp class.

                          A&H GL2800 console, BagEnd Crystals over D-18's, 12"and 15" BagEnd and EAW wedges powered and processed by QSC, Klark, BSS, Symetrix, Valley, Sabine, Peavey and BagEnd INFRA.

                          Comment


                          • #14
                            Originally posted by agedhorse View Post
                            Correct, running speaker lines parallel to mic lines over an extended distance is bad practice in general, worse in the case of class d due to the relative ease of carrier coupling and since the carrier contains some audio information the mic pres must have exceptional rfi filtering as rejection isn't happening at carrier frequencies.
                            define "extended"? >25? 10? 50'?'

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                            • #15
                              I found this on Wikipedias info on PWM amps
                              Electromagnetic interference[edit]

                              The switching power stage generates both high dV/dt and dI/dt, which give rise to radiated emission whenever any part of the circuit is large enough to act as an antenna. In practice, this means the connecting wires and cables will be the most efficient radiators so most effort should go into preventing high-frequency signals reaching those:
                              • Avoid capacitive coupling from switching signals into the wiring.
                              • Avoid inductive coupling from various current loops in the power stage into the wiring.
                              • Use one unbroken ground plane and group all connectors together, in order to have a common RF reference fordecoupling capacitors
                              • Include the equivalent series inductance of filter capacitors and the parasitic capacitance of filter inductors in the circuit model before selecting components.
                              • Wherever ringing is encountered, locate the inductive and capacitive parts of the resonant circuit that causes it, and use parallel RC or series RL snubbers to reduce the Q of the resonance.
                              • Do not make the MOSFETs switch any faster than needed to fulfil efficiency or distortion requirements. Distortion is more easily reduced using negative feedback than by speeding up switching.

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