WONDOM AA-AB33182 Audio Amplifier Board STA516B 4x 100 Watt 4 Ohm Class D

Sure Audio Amplifier Board STA508 4 x 100 Watt 4 Ohm Class D

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Shipping date: 25-05-2022.

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Accessories for this product

Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.

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Amplification module WONDOM STA516B 4CH

Class D 4x100W 4Ω @

Amp module AB33182 Sure Electronics Wondom

This Wondom amplifier module is capable of developing up to 4x100W power with a load of 4Ω. It enjoys high efficiency thanks to class T Amplification Technology (up to 90.3% / channel).

Fan & heatsink

amplifier module with heatsink fan and

The module is equipped with a heatsink surmounted by an automatic-triggered fan in order to avoid overheating that lowers performance and wear the components. This helps to reduce noise and distortion for each channel. The measurements show a THD <1% up to 69W with a 90dB SNR.

power Connectors


To facilitate handling, positive RCA input connectors are already mounted on the housing. Similarly, a DC jack 5.5 / 2.5mm and a power supply terminal are also in place. The outputs are accessible directly on the same PCB through imposing pellets, or terminal (also mounted).

The amplifier is compliant parallel BTL and may operate in différants conditions Scheme 4 inputs / 4 outputs.

The amplifier finally has a mute terminal / + 5V to control the powering of the circuit.

TypeModule amplifier
ChipAmp : 4x STA516B
Driver : 2x Tripath 
Minimum load
BTL SupportYes
Input sensitivity (RMS) 100W @ 4Ω 1kHz520mV
Input impedance10K
Power / channel100W @ 4Ohm 27V DC THD + N 10%
69W @ 4Ohm 27V DC THD + N 1%
THD@ 4Ω, 01W, 1 KHz - 0.03%
@ 4Ω, 10W, 1 KHz - 0.09%
Output noise (when grounded)211μV
SNR @ 69W / 4Ω 1% THD + N90dB
Power supply Not Included15-27VDC 
DC jack 2.5/5.5mm
Center = positive
Power consumption in stand-by6W
Dimensions152.4mm x 114.3mm
Thermal dissipationheatsink & Fan

Top view

AA-AB33182 top view

Sure AA AB33182 module connectivity




Data sheet
OutputScrew terminals
Channel2 (Stereo)
ClassClass D / T
Amplifier chipSTA516B
Power (W)100.0
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