SMD AD-1 Amp Dyno vs. Rockford Fosgate Punch 200 DSM FULL Test
Channel: Williston Audio Labs
Date: 2013-11-29

The 1993 Rockford Fosgate Punch 200 DSM was one of the most well regarded amps of it's time. Here's a quote from a May/June 1993 Car Stereo Review test of the Punch 200 DSM, "In terms of design, construction, aesthetics, and sonic purity, Rockford's Punch 200 easily stands among the best power amplifiers on the market today...If you're driving your system with something else, chances are you're listening to something inferior." (Ken C. Pohlmann)

Here are the results from my test with the SMD Amp Dyno:

8 ohms - Amp is rated at 200W at 12V (or 100W x 2 at 4 ohms)
8 ohms - Certified 1% THD - 258W at 12.85V
8 ohms - Uncertified - 262W at 12.87V
8 ohms - Dynamic RMS - 262W at 12.83V

4 ohms - Amp is rated 400W at 12V (or 200W x 2 at 2 ohms)
4 ohms - Certified 1% THD - 421W at 12.53V
4 ohms - Uncertified - 423W at 12.51V
4 ohms - Dynamic RMS - 459W at 12.93V

2 ohms - Amp is not rated at 2 ohms mono or 1 ohm stereo
2 ohms - Certified 1% THD - 573W at 13.06V
2 ohms - Uncertified - 856W at 11.87V
2 ohms - Dynamic RMS - 890W at 12.97V

All tests above were at 40Hz. We re-ran the tests at 1kHz and the only notable differentiation in results was the 2 ohms Dynamic RMS test where we obtained 920W at 12.79V. We have determined the difference was related to voltage and believe provided the proper voltage (14.4V), the amp would have measured over 1000W Dynamic RMS at 40Hz also. Not bad from a 200W amp!

More Amp Dyno AD-1 tests coming!

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