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Junior Varsity
JBL STX Problem
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<blockquote data-quote="TJ Cornish" data-source="post: 96668" data-attributes="member: 162"><p>Re: JBL STX Problem</p><p></p><p>As Aaron said - divide and conquer:</p><p>- Use a 9v battery on the speaker terminals to ensure that both drivers move the same way. Do this on both your cabs to make sure both speakers have the same polarity. </p><p>- Verify your speakon cables are wired correctly - no polarity reversals.</p><p>- Skip the amp presets, try the amp flat. With the speakers unplugged, use a signal generator or a sine wave file as input and make sure you can get the amp to go to full output. Measure with a volt meter to be sure.</p><p>- Start putting things back together slowly and see what affects things - plug one sub into one channel of the amp, use your signal generator carefully and see if you get the output you expect (be careful of driver excursion and use 80Hz to do this - not 30Hz).</p></blockquote><p></p>
[QUOTE="TJ Cornish, post: 96668, member: 162"] Re: JBL STX Problem As Aaron said - divide and conquer: - Use a 9v battery on the speaker terminals to ensure that both drivers move the same way. Do this on both your cabs to make sure both speakers have the same polarity. - Verify your speakon cables are wired correctly - no polarity reversals. - Skip the amp presets, try the amp flat. With the speakers unplugged, use a signal generator or a sine wave file as input and make sure you can get the amp to go to full output. Measure with a volt meter to be sure. - Start putting things back together slowly and see what affects things - plug one sub into one channel of the amp, use your signal generator carefully and see if you get the output you expect (be careful of driver excursion and use 80Hz to do this - not 30Hz). [/QUOTE]
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