See PRICES for Op-Amps. NewClassD - Single Op-ampsNewClassD single op-amp upgrade for NE5534, LT1122, OPA627, AD811, AD844. NewClassD - Dual Op-ampsNewClassD dual op-amp upgrade for AD712, AD827, C4570, JRC4580, JRC5532, JRC5532D, JRC5534, LF353, LM833N, NE5532, NEC4520, NEC4570, NJM2068D,…