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About aflint

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  1. Exojam, While a regulated power supply is not required, you are correct in the sense that you must put adequate power into an amplifier of any brand to get the rated or specified power out. There are technologies available that allow an amplifier to give you rated power even when you have poor mains power, like in ITech, but these are expensive to implement. The reason why this is being added to the list of things to improve upon is because it is an opportunity for us to improve the amplifier. We always strive to engineer, design, and manufacture the best products possible. I hope that better answers your initial question. Please let us know if you have further questions regarding this product or any of our other products. Thanks. Andy Flint
  2. All, Again we appreciate your responses and are happy to answer all of your questions regarding any of our products. I will attempt to address specific questions that I have seen in the responses. Chuck- You stated that you are using a 30 amp variac set to 120VAC but that does not answer our question to you. What was the voltage that you actually measured with the amplifier hooked up? We were using a 100 amp variac with a 50 ft extension cable on the end of it and measured 115VAC. Please let us know your what you were reading as we suspect that your mains voltage was below 115VAC based on the testing that we did. Also all of our measurements were done with both channels driven. The loads used for this test (and all other amplifier testing done at our building) are rated for 15,000 watts per channel, are linear in their response from 20Hz – 20kHz and accurate to within .01 ohms, and are located in climate controlled chambers at our facility. Exojam- You were asking about what we expect to see regarding output power from 20Hz – 20kHz. Dave Glass did a really good job earlier in this thread explaining what we expected to see for the 20 – 20 number compared to the 1K number. Please go read his previous post, but for a simple answer we would expect to see about a 20% decrease in power with this series of amplifiers. You also asked if the new XTi’s will have a different design or if the existing can be fixed. I would like to again point out that this amplifier works to its specifications and it is completely normal for an amplifier to put out less power 20Hz – 20kHz when compared to its 1kHz rating. While it was identified that our DC/UV protection was a little sensitive when driving a resistive load, this condition does not exist when driving a reactive load (speaker). Unless someone is using this amplifier to solely make laboratory measurements this behavior is not present. Thanks again for all of your interest and please let us know if you have further questions. Andy Flint
  3. All, We appreciate your patience while we got some data together to appropriately answer the question posed. In response to the question regarding 20Hz power on the XTi1000: The XTi series of amplifiers was completely designed, tested, and is manufactured in Elkhart at our factory. When the XTi (also CDI and DSI which share a common platform) was designed and released for production we absolutely tested each model thoroughly and documented all of the results. The reason it took a few days for us to respond with power numbers is because we wanted to retest the amplifiers and have fresh data to compare with your numbers as sometimes things “drift” after production starts. We have shipped over 100,000 units since this product launched so it was imperative that we test a unit that was representative of your amplifier. With that said, our engineers tested a new XTi1000 production unit two different ways: 1. 120V regulated power source 2. An unregulated power source at the end of a 50ft extension cord – our engineers read 115V All of the power numbers were measured at 0.5% THD. The amplifier put out 400W @ 4ohms at 20Hz with the 120V regulated power source and put out 220W @ 4ohms at 20Hz with the unregulated power source. Can you please tell us what your mains power voltage was? Based on our findings we feel your mains might have been well below 115V which would also explain what you thought was an oscillation. This was actually the DC/Under-Voltage protection activating at 20Hz due to sagging mains. We also tested the amplifier at 30Hz with the same two conditions. The amplifier put out 425W @ 4ohms with the 120V regulated power source and put out 380W @ 4ohms with the unregulated power source. It's worth noting the 220W number at 20Hz. We expect the 20Hz power to be decreased when compared to 1kHz, but not by this much. What we found is that our DC/Under-Voltage protection is a little bit too aggressive at 20Hz. We will add this to our ongoing improvements list for the product. It hasn't been a problem in the real world because the circuit doesn't activate with a loudspeaker connected, only with a resistive load. Again thank you for your patience while we have gathered the above information. Please let us know if you have further questions regarding this subject and we look forward to hearing what your mains voltage was. Thanks, Andy Flint
  4. XTi System Architech

    Hi guys, The software is still being worked on, but we anticipate it being completed very soon. We will definitely keep everyone posted and will provide a link to the software when it becomes available. We are very sorry for the delay and appreciate your patience with this matter.
  5. XTi System Architech

    The software has not been released as of yet. It should be available by the end of this month for download. Once the software has been downloaded and the amplifier is connected to the computer, it will automatically update the amplifier's firmware and you will be ready to start using the software. Please let me know if you have any more questions. Thanks.