Topping PA3s Power Amplifier

Topping PA3s Power Amplifier

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Key info

The Topping PA3s Digital Amplifier is ready for any 4 – 8 ohm loudspeakers with two RCA inputs and two TRS balanced inputs in a small package the PA3s is ideal for desktop systems.

All specifications

Physical characteristics
Dimensions (HxWxD) 4.0 x 16.8 x 12.0 cm
Technical specifications
Frequency response SE IN 20Hz-40kHz (±0.1 dB) | BAL IN 20Hz-40kHz (±0.1 dB)
Gain SE IN 25.2dB | BAL IN 19.5dB
Dynamic range SE IN 107dB @1kHz (A-wt) | BAL IN 112dB @1kHz (A-wt)
Crosstalk SE IN -96dB @1kHz | BAL IN -100dB @1kHz
Channel balance SE IN 0.5dB | BAL IN 0.5dB

2xMA12070 Fully balanced
Class D amplifier

Each channel of PA3s uses one MA12070 Class D power amplifier chip. This allows separation in layout improving performance and reducing crosstalk. The power is shared across two chips, the heat dissipation is also halved for each chip, improving reliability and extending the lifespan of the product.

High output power

PA3s could output 80W x2 at 4ohm load, 10% THD+N. In higher standard of THD+N of 1%, output power will be 65W×2 at 4ohm load. The output power is enough to drive any bookshelf speakers and even some floor speakers.

Balanced + Single-ended inputs

PA3s provides TRS balanced input and RCA single-ended input. The use of balanced input eliminates potential ground loop problems giving the pristinely clean audio without any hum. Two inputs are selectable using front panel button. PA3s will remember the input selected when it was turned off.

“Comfort zone” with lowest distortion

The lowest THD+N of PA3s is in the range of 10-20W output, which happens to be the power range commonly used for listening to music. Everything is just in the right condition. 

D10 Balanced could be best USB DAC for PA3s

D10 Balanced can provide high-fidelity USB decoding and TRS balanced output. When used with PA3s, it is equivalent to adding a high-performance USB input to PA3s. This combination is simple and efficient.

With the help of a DAC, the function is expanded to a greater extent 

PA3s can be used with a DAC to expand the categories of digital inputs; if used with a DAC+HPA, more comprehensive functions can be achieved.

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