Four or so years ago I went on a quest to determine the most suitable amplifier for the pair of WP7s that I had just purchased. One counter intuitive observation was that the power rating of the tube amplifiers in my survey often did not correlate well with the ability to get the linear, unrestrained sound that, for me makes WP7s so desirable. In particular, several very powerful amplifiers failed to deliver the tuneful, dynamically nuanced bass that matched the tonal and dynamic palette of the midrange. A few were also unable to deliver convincing treble extension, which was particularly evident with high percussion (triangles, cymbals, etc.). I arrived at three favorites at that time: Lamm ML1 (90 wpc), ARC Reference 400, and Music Reference RM-200. Of the three the ARC had the best bass, the Lamm had the most tactile midrange, but the MR was the most balanced with the most music. I was prepared to spend alot more money, but I really liked this combo.
