Andy Martin of Reverb.com does and A/B test between the True Spring Reverb and a Fender '65 Reissue Deluxe Reverb. Can you guess which spring reverb and tremolo effects are coming from the True Spring pedal and which are coming from the Fender Deluxe amplifier? We have to admit that it wasn't easy for us to tell the difference. :-O Check out the True Spring Reverb blog on Reverb.com.