The CAP-151 power supply includes a massive toroidal transformer, along with Classé Audio's unique solution to capacitive filtering. Rather than the large, slow filter capacitors found in most power supplies, the CAP-151 uses a large number of smaller capacitors distributed throughout each stage of the amplifier and preamplifier. These capacitors offer filtering in close proximity to the circuits they supply. The result is a lightning-quick response coupled with a more natural sound. The CAP-151 also includes a very special capability; with a simple touch of a front panel button, the amplifier and preamplifier sections of the CAP-151 can be separated. This is particularly convenient for use as part of a more complex multi-amplifier system, or for the purpose of inserting equalization or other room correction between amplifier and preamplifier stages. In this way, the CAP-151 offers the flexibility of separates while maintaining the convenience and simplicity of an integrated amplifier.