An improved trench structure, and method for its fabrication are disclosed. The method includes establishing an optimal phase and amplitude-mz relationship by acquiring peak quality data at varying values of amplitude and phase. The nascent absorber layer andor substrate is then rapidly heated from an ambient temperature to an average plateau temperature range of between about 200\xb0 C. In some embodiments, the performance indicators, counters, thresholds, and other performance monitoring structures may be stored in a page table that is used to translate virtual addresses into physical storage addresses. By this method, impact strength and flame retardancy are recovered or improved. The adapter having a male mini stereo jack for connection into the PC sound board, such male jack making direct connection to dual RCA output cables for connection to other audio equipment, and also having a female mini stereo jack for reception of standard PC sound equipment such that home audio equipment can be easily hooked up to the PC without disconnecting the PC audio equipment.