DEQX Legacy Products HDP-3 Predecessor to the HDP-4. Now discontinued. Full information HDP-Express Predecessor to the HDP-Express II. Now discontinued. Full information DEQX Mate Predecessor to the PreMATE. Now discontinued. Full information PDC 2.6 HD The first 96 kHz DEQX processor. Long discontinued. Full information PDC-2.6P HD The preamp version of the PDC-2.6 HD. Now discontinued. Full information