I'm back from vacation, and slowly starting to look at old posts. Here's some math:
RMS is peak-ro-peak times 0.35, or peak-to-peak over (2 * root 2) which is also peak voltage times 0.7 or peak over (root 2). 0.49 volts peak to peak is thus 0.17v rms.
dB gain is 20 times the base-10 log of the voltage ratio. The 1kHz gain of Seduction is approximately 40dB, which means the output is 100 times the input.
100 times 0.17v rms is 17 volts rms, and Seduction can put out that much before distortion sets in.