The Balanced Audio Technology SIX-PAK is used in select phono stage as well as line stage preamplifiers. When used, two SIX-PAK assemblies are installed in the product - one for each channel. The SIX-PAK assembly itself consists of six paper-in-oil capacitors that are built into a dedicated module, which is then used for output coupling in a number of BAT designs. The benefit of using smaller value oil-capacitors and then stacking them is that the midrange and treble purity of the signal is preserved. The greater benefit is that the lower bass and mid-bass performance becomes more visceral, without any corresponding tradeoff in the balance of the frequency range.