Tasel

Based on three characteristics: good quality sound, easy to make, and not expensive circuit, this TOSHIBA DX is worth to try. Just need 36VDC voltage input as a fuel, the circuit can produce 100W output on 40 Ohm speaker or 50W on 80 Ohm, using a pair of TOSHIBA A1943 – C5200 per channel.

Composed of two similar mono amplifier. Each channels has its own power supply. This class A audio amplifier take 50V as the fuel, and will produce very loud sound output without distortion.

This is a small and simple audio amplifier with TDA7294. Using 2 TDA7294 for stereo (2×80 watt) mode and bridge mode (180 watt). The TDA7294 for use as class AB audio amplifier.

The circuit using active component to operating. In this case, the active component is IC NE5532 or TL072 as a linear part. With 15 V power supply, this circuit separate the low out and high out. The low out connected to a woofer, and high out in tweeter.

Basic operation of this circuit is similar DC to DC converter. With input from 18VAC at 800mA then converted to DC by B1 bridge rectifier. R11 work as adjuster, a twin of IRF510 as final amplifier, and a CT transformer is the last converter to provide the high voltage output.

TDA7294, monolithic IC with output up to 100W as main core for this useful audio amplifier. This circuit is a mono for a single channel in 4Ω or 8Ω load. Simple audio class A-B amplifier.

Here is a portable headphone amplifier for your music player. This circuit improve the gadget audio outputs with low noise and distortion, as well as a long battery life. With an external amplifier, the headphone driver in the music player is no longer required to supply high currents into a low impedance.

Very high power amplifier with 10 pairs of power transistor. Can use MJ15024 and MJ15025 or MJ21193 and MJ21194. Those 20 pieces transistor work as final active component for final gain. This circuit required dual output power supply 130V.