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Old 20th April 2013, 05:13 AM   #1
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Default Rockford Fosgate 800A2

Amp is using the MMBTA56's and 06's as the drivers in the power supply..

Will the MMBTA42 and 92 work in there place ??
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Old 20th April 2013, 05:44 AM   #2
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I have used MMBTA56/MMBTA06 and MMBT3904/MMBT3906 and had success with both.

I have not tried the MMBT42/MMBT92, you could try them and see.
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Old 20th April 2013, 08:39 AM   #3
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The 42's/92's are for high voltage applications with specs almost 4 times the original part.

I would use the originals......you might want a second opinion.
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Old 21st April 2013, 01:40 AM   #4
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The 42/92 have lower gain and may not work well. The others suggested will work properly.
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