If your project involves either bridged or parallel speaker connections then this instrumentation amplifier AD521KDZ differential amplifier from Analog Devices is an essential component. Its typical dual supply voltage is ±9|±12|±15 V, with a minimum of ±5 V and maximum of ±18 V. This part has a minimum operating temperature of 0 °C and a maximum of 70 °C. This device uses dual power supplies. It has a single channel per chip.
Instrumentation Amplifier 1 Circuit 14-PDIP