An automated trading exchange having integrated quote risk monitoring and quote modification services. The liquid supply path comprises a plurality of wall surfaces, and a part of the wall surface is formed of a flexible member that is flexed by the inside-and-outside pressure difference of the liquid supply path. For example, the game process may be a Latin square for which each term in the first sequence is identified with a row and each term in the second sequence is identified with a column and the entries of the square are elements of a third set. After the materials are chrome plated, they are heated above the melting point of a buffing compound, and then the heated materials with the buffing compound applied are buffed. The subwoofer assembly further including a sound driver mounted within the subwoofer housing for generating predetermined sounds.