Pre-Amplifier The No.326S features audio circuits, controls, architecture, and optional phono modules based on the critically acclaimed No.32. In fact, some audio circuits, such as the proprietary discrete volume attenuators, are identical to those found in the No.32. The No.326S is similar to the No.320S, but the main circuit board has been replaced with an Arlon board that responds more quickly to transient signals in both the high and low frequency regions. The Arlon also presents a deeper imaging that reveals more of the subtle nuances of a recording, imparts a more engaging texture to the high frequencies, and presents more of the ambience of a recording. All of these properties work together to yield a sonic signature that is wider, deeper, warmer, and clearly superior.