Snell C IV review here -> http://www.theaudiocritic.com/back_issues/The_Audio_Critic_16_r.pdf
From the review;
"The sound of the Snell Type C/IV is, yes, the best I've ever heard out of a monkey coffin - uncolored, transparent, low in distortion, high in resolution, perfectly balanced, much better on the bottom end than the C/II. The frequency balance-which depends not so much on whether the response is ±2 dB, or ±2.5 dB, or whatever, but on just where those little zigs and zags occur - is probably the most satisfying of any speaker known to me."
From the review;
"The sound of the Snell Type C/IV is, yes, the best I've ever heard out of a monkey coffin - uncolored, transparent, low in distortion, high in resolution, perfectly balanced, much better on the bottom end than the C/II. The frequency balance-which depends not so much on whether the response is ±2 dB, or ±2.5 dB, or whatever, but on just where those little zigs and zags occur - is probably the most satisfying of any speaker known to me."