I don't have the gear to measure the freq response. Maybe I can get Pano to make a trip out this way. Last I looked, I couldn't find a spec sheet on the original 515 either. I also forgot the 15" vs 16" issue, which prolly seals the deal.
I'm running the center on a PP 7189A powered tube amp, one channel for the highs, one channel for the lows. This should put out somewhere around 15-18 WPC, and the SC-ASR-433 does have a 16 ohm tap, which is what I'm using.
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