The TDA2050Pro is meant for professional use in converting passive speakers to active. The entire power amplifier can be installed inside the speakers, thus making the bulky external power amplifier redundant.

Since space inside a speaker is always at a premium, the pcb is designed as small as possible. It has a footprint of only 2.7" x 2.25". But it's not simply the size. It is packed with everything that's needed. First off, the power supply is on-board. There's an 8A bridge rectifier followed by 6,600uF of filter caps. There are also two voltage regulators for the op amp. This op amp is essential as it provides a balanced input and sensitivity adjustment for dBu or dBV reference.

The main amplifier is a TDA2050 chip amp. Apparently this chip amp is discontinued, as in quite a number of other audio transistors. Fortunately, AmpsLab has more than a hundred in inventory. This module is good until our stocks are depleted.

The performance of the TDA2050 is excellent for active speakers. During auditioning, it was very pleasant to listen to for background music while working.

The TDA2050Pro is ideally suited for commercial applications like in a restaurant for quality music while dining. This can be seen in the impressive Rise Time of 1.6us in the 10kHz Square Wave plot.

1kHz Full Power into 4 Ω
10kHz Square Wave into 4 Ω

TDA2050Pro Specifications

Power Output = 16W into 4Ω
Input Sensitivity (@ 1kHz before Clip) = 0.22V RMS (Balanced)

Input Impedance = 33K
Rise Time = 1.6us at 10kHz Sq into 4Ω
Voltage Gain = 30dB

Power Supply
Power transformer = 12-0-12Vac
Supply Rails = +/- 16Vdc
Power Supply Caps = 3,300uF/25V x2

PCB = 2.7" X 2.25" (69mm x 57mm)
Double Sided | FR4

The TDA2050Pro is one channel and is supplied Unassembled. Two kits are required for stereo.

To complete the amplifier, the following are needed
1) a power transformer
2) a heatsink for the TDA2050 amp


US$ 14.50

$40 Minimum Order on Check Out
Shipping info

60 Downes Street | Calais | ME 04619 | USA