The Space Heater 500 is a device that is designed to add color and distortion to the signal path. Specifications such as distortion, noise or phase shift simply do not apply. One must read the specifications with an eye towards ‘the type of distortion’ that is being generated and there is no better indicator than the even-order harmonic distortion that is evident when looking at the FFT (Fast Fourier Transform) where a near-perfect cascade flows. Even-order harmonic distortion is both pleasing to the ear and when applied in moderation, can truly enhance tracks without interfering.