Texas Instruments [India] Pvt. Ltd. Offers 1.4-W/Ch 2-Input Audio Subsystem. Texas Instruments [India] Pvt. Ltd. Supplies different types of semiconductors, amplifiers, linear amplifiers, clocks, timers, data converters, microcontrollers, etc. The 1.4-W/Ch 2-Input Audio Subsystem comes with Stereo Class-D and Direct Path Headphone Amplifier. The 1.4-W/Ch 2-Input Audio Subsystem of model number TPA2050D4 has two stereo single-ended [SE] inputs that can be configured as one stereo differential input. Both input channels have a 32-step volume control and the DirectPath headphone amplifier has a 4-level gain control for coarse volume adjustment. All amplifiers have output short-circuit and thermal-overload protection.