Amplifier module - TPA3116D2 - CLASS D - 2.1 - 2x50W + 1x100W (subwoofer)

2.1 channel Class-D amplifier module TPA3116D2 -  2x50W + 1x100W (subwoofer)

• TPA3116D2 based Class D-amp
• Absolut max power 2x50W ja 1x100W
• Supply voltage 4.5-25V
• Recommended supply voltage: 19-24V, min 4.5A
• Sensitivity: 1V / 17W
• THD + noise: 3% 25W
• Subwoofer output -3dB (low pass) 130Hz, -6dB 155Hz, -10dB 200Hz
• Stereo outputs does not have high pass filter (=flat freq responce)
• Audio in: 3.5mm audio in and 3 pin pcb connector
• DC in: 2.1mm DC jack or screw connector
• Speaker terminals: screw connectors
• Size: 100 x 70 x 30mm (+ potentiometer shafts)
• Design inspected and measured with audio analyzers and listening tests.
  

Suitable power supply:
24V / 5A, 120W switched mode power supply - 2.1mm (center positive)

TPA3116D2 is a very common chip in lower price power amps. Really low costs 2.1 DIY system can be built around this module.

Output filter coils warm, so good ventilation is needed. These could also be upgraded to bigger power rating coils (10uH min 5A). We recommend these ones:
Inductor - ferrite core - 10µH - 8.5A - 14.8mohm - radial

Change all 6 coils. Mod is easy since parts are big and easy to solder. After mod THD gets much better so it is really worth to do.

Please note: Class-D amp modules can easily be destroyed if the supply voltage is too high, supply voltage polarity is not correct, or speaker impedance is not right.

More info about amp chip: https://www.ti.com/lit/ds/symlink/tpa3116d2.pdf

Please note 2: There are lots of different low-cost Class D boards available. Some are great, some decent, and many are not that good. Some do not even work at all. We have tried many different boards and preselected ones that have a good price to quality ratio. We have measured and listened to every design in our audio lab. We try to be as honest as possible and tell the truth about quality. We also publish modifications if we found a way to improve sound quality.