kipman725 Posted September 26, 2022 Report Share Posted September 26, 2022 On 9/20/2022 at 8:55 AM, Mike said: Hi All, Finally I have all the parts for my for my active versions built. I'm using NSW6021-6 21" with Loto Dsp amp module from powersoft with either the 3004PFC2 or 4HV amplifier amp modules, I might try both amps options...The DSP has a few limit options available. What's the best value for the NSW6021-6 driver for the following limiters. 1, TruePower TM 2, RMS Voltage 3, RMS current 4, Peak Limiter Thanks this document from powersoft has some guidelines (6" coil): https://www.powersoft.com/wp-content/uploads/2019/01/powersoft_TN009_LimiterSetup_en_v1.0.pdf Limiters are also a function of the box design and to an extent the program material. They are used to prevent over excursion and thermal damage. You can check this in Hornresp but I don't think the amplifiers above have enough output voltage with this driver to cause over excursion with an appropriate high pass filter. Then you are just left with thermal damage for which you want the TruePower limiter. To set this you start at a low value and measure magnet temperature* over a long period of time while running program material that is heavily compressed by the limiter. Adjust up the limiter slowly (it may take on the order of an hour for the magnet temp to stabilize) until you reach the maximum magnet temp you want to allow (<100C !). This procedure takes a long time, makes a lot of noise and may destroy your driver... 1 Quote Link to comment Share on other sites More sharing options...
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