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.
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.
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.
performance of the TDA2050 is excellent for active
speakers. During auditioning, it was very pleasant
to listen to for background music while working.
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.
Full Power into 4 Ω
Square Wave into 4 Ω
Output = 16W into 4Ω
Input Sensitivity (@ 1kHz before Clip) = 0.22V RMS
Input Impedance = 33K
Rise Time = 1.6us at 10kHz Sq into 4Ω
Voltage Gain = 30dB
Power transformer = 12-0-12Vac
Supply Rails = +/- 16Vdc
Power Supply Caps = 3,300uF/25V x2
= 2.7" X 2.25" (69mm x 57mm)
Double Sided | FR4
TDA2050Pro is one channel and is supplied
Unassembled. Two kits are required
complete the amplifier, the following are
1) a power transformer
2) a heatsink for the TDA2050 amp