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Junior Varsity
Behringer iNUKE NU6000 amplifier
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<blockquote data-quote="Uli Behringer" data-source="post: 83443" data-attributes="member: 1604"><p>Re: Behringer iNUKE NU6000 amplifier</p><p></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'">Dear all,</span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">we have found no indications that this incident is related to other models than the NU6000.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">We are currently looking into tying the defective batch to particular serial numbers. However this will take some time as the vendor is performing an internal investigation and so far cannot tell us yet what exact batch of problematic diodes is affected.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">Our Care department has since issued a Service Notice which has been sent to our internal and external service centers together with spare parts. </span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span><span style="font-size: 10px"><span style="font-family: 'verdana'">To Kevin's point, all our products are stress-tested for 100 hours at 1/3 and also full power. These tests are not only part of the standard stress test during the design phase but also built into the production process where random stress tests are performed aside from the 100% Audio Precision performance tests. </span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">We also employ in-circuit tester, automatic optical inspection systems and x-ray screening tests.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">However in this case, the diodes in question do not show any obvious defects, but they don't meet vendor specifications. In fact we didn't find any of these problems in production and as customers here can confirm, all amps were fully functional when delivered.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">However under certain circumstances, which we now believe relate to spikes in the mains power supply, the diodes are pushed to the upper limits of their specs and break. It is interesting, that we seem to have higher failure rates in Europe and in particular the UK as well as in Australia where mains voltages can reach up to 260 Volts. </span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'">Once the problematic diodes are replaced, the amp will perform as expected and our Care Division will now reach out to David to get the other three amps serviced.</span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">Unfortunately, it is extremely difficult to perform IQC (Incoming Quality Control) on semiconductors unless you are a semicon manufacturer yourself as you will require extremely complex and expensive testing equipment.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">How would you test integrated SMT circuits off-line? </span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">A manufacturer's best bet is always to use first-class semicon brands and this is exactly what the MUSIC Group’s practice has always been. Anything else is a huge risk which we would not take. </span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">If you inspect our products, you will only find components from Analog Devices, TI, NJR, Rohm, Freescale, STM, Samsung, On Semi, IR etc. which are all considered tier-one brands.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">I hope this explains the background around this incident.</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">Warm regards</span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"><span style="font-size: 10px"><span style="font-family: 'verdana'">Uli </span></span></span></span></p><p><span style="font-size: 10px"><span style="font-family: 'verdana'"></span></span></p></blockquote><p></p>
[QUOTE="Uli Behringer, post: 83443, member: 1604"] Re: Behringer iNUKE NU6000 amplifier [SIZE=2][FONT=verdana]Dear all, [/FONT][/SIZE][SIZE=2][FONT=verdana] [SIZE=2][FONT=verdana]we have found no indications that this incident is related to other models than the NU6000. We are currently looking into tying the defective batch to particular serial numbers. However this will take some time as the vendor is performing an internal investigation and so far cannot tell us yet what exact batch of problematic diodes is affected. Our Care department has since issued a Service Notice which has been sent to our internal and external service centers together with spare parts. [/FONT][/SIZE][SIZE=2][FONT=verdana]To Kevin's point, all our products are stress-tested for 100 hours at 1/3 and also full power. These tests are not only part of the standard stress test during the design phase but also built into the production process where random stress tests are performed aside from the 100% Audio Precision performance tests. We also employ in-circuit tester, automatic optical inspection systems and x-ray screening tests.[/FONT][/SIZE] [SIZE=2][FONT=verdana]However in this case, the diodes in question do not show any obvious defects, but they don't meet vendor specifications. In fact we didn't find any of these problems in production and as customers here can confirm, all amps were fully functional when delivered. However under certain circumstances, which we now believe relate to spikes in the mains power supply, the diodes are pushed to the upper limits of their specs and break. It is interesting, that we seem to have higher failure rates in Europe and in particular the UK as well as in Australia where mains voltages can reach up to 260 Volts. [/FONT][/SIZE] Once the problematic diodes are replaced, the amp will perform as expected and our Care Division will now reach out to David to get the other three amps serviced. [SIZE=2][FONT=verdana]Unfortunately, it is extremely difficult to perform IQC (Incoming Quality Control) on semiconductors unless you are a semicon manufacturer yourself as you will require extremely complex and expensive testing equipment. How would you test integrated SMT circuits off-line? A manufacturer's best bet is always to use first-class semicon brands and this is exactly what the MUSIC Group’s practice has always been. Anything else is a huge risk which we would not take. [/FONT][/SIZE] [SIZE=2][FONT=verdana]If you inspect our products, you will only find components from Analog Devices, TI, NJR, Rohm, Freescale, STM, Samsung, On Semi, IR etc. which are all considered tier-one brands.[/FONT][/SIZE] [SIZE=2][FONT=verdana]I hope this explains the background around this incident. Warm regards Uli [/FONT][/SIZE] [/FONT][/SIZE] [/QUOTE]
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