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Topping MX3 Multi-purpose Digital Amplifier

RM 540.00
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Our take

Now, here's a multi function digital amplifier with built-in DAC, Bluetooth, headphone amp and power amplifier for passive speakers. One of Zeos's favorite devices, all-in-one unit that features coaxial digital input, fiber optic, Bluetooth, analog input, subwoofer output, line input, a good headphone amplifier with a user friendly remote control! Limited units available 

For those of you new to this, here's a pretty good DAC 101 article. In layman's terms, a DAC simply converts digitally stored information (stream of 1s and 0s) from a smartphone, laptop computer into an analog sound that we can hear. 

Many devices include built-in DACs. However, an outboard/ external DAC usually offers better sound quality by minimizing jitter problems, background hiss and unwanted noise.

Product details

Topping MX3 is a true multitasker. Its compact, aluminum case is filled to the brim with hi-fi audio components. Inside you’ll find a USB DAC, Bluetooth receiver, integrated amplifier and a headphone amplifier. MX3 is fitted with a myriad of inputs and outputs, including USB, optical and coaxial inputs, and 3.5mm jack headphone output, banana outputs and a dedicated RCA output for a subwoofer.

MX3 is based on high-quality components with proven reputation in the audio world, these include PCM5120A DAC chip, SA9023A USB interface, CS8416 S/PDIF receiver, NJW1194 volume controller, TDA7498E amplifier chip and LMH6643 headphone amplifier chip.

Texas Instruments PCM5120A DAC chip uses the latest generation of TI-s advanced segment-DAC architecture to achieve excellent dynamic performance and improved toleracne to clock jitter. It comes with a 32bit, 384kHz PCM interface and features market-leading low out-of-band noise, integrated negative charge pump, intelligent muting system and an integrated high-performance audio PLL which reduces the system’s EMI.

STMicroelectronics TDA7498E is a dual BTL class-D audio amplifier known for its high efficiency, differential inputs that minimize common-mode noise, small offset and smart thermal overload protection.

Texas Instruments LMH6643 chip responsible for headphone amplification is a true single supply voltage feedback amplifier that offers high speed (130MHz), low distortion (-62dBc), and an exceptionally high output current (approximately 75 mA). Its output voltage range allows for a wide dynamic range, its output stage is capable of driving heavy loads, while fast output Slew Rate (130V/us) ensures large peak-to-peak output swings even at high speeds. Careful attention has been paid to ensure LMH6643’s stability under all operating voltages and modes. The result is a very well behaved frequency response characteristic (0.1dB gain flatness up the 12 MHz under 150 Ω load and AV = +2) with minimal peaking (typically 2dB maximum).

Its intuitive design makes it very easy to use. It has a very readable LED display and a number of facilitations, such as remote control or NFC pairing that, combined with high quality components, guarantees joy of listening to the music.

Tech specs

InputsBluetooth, USB, Optical, Coaxial, Aux
Headphone output3.5mm
Speaker outputBTL, banana
Subwoofer outputRCA
Bluetooth range< 10m
THD+NHeadphone out <0.0006% @ 1kHz, 130mW, 32Ohm
Speakers out <0.005% @ 1kHz, 20W, 8Ohm
SNRHeadphone out >103dB @ 1kHz
Speakers out >91dB @ 1kHz
Frequency response20Hz - 20kHz
NoiseHeadphone out <18uVrms
Speakers out <0.5Vrms 
Output voltageHeadphone out 10Vpp
Speakers out 46Vpp
Channel balance0.05dB
GainHeadphone out 11.6dB
Speakers out 29.6dB
Output powerHeadphone out 257mW x 2 @ 32 ohm THD+N<1%; 42mW x2 @ 300 ohm THD+N<1%
Speakers out 38W x 2 @ 8 ohm THD+N<10%; 40W x 2 @ 4 ohm THD+N<10%
Suitable load impedanceHeadphone out 16 - 300 Ohm
Speakers out 4 - 8 Ohm
USB in44.1kHz - 96kHz / 16 Bit - 32 Bit
Optical/coaxial in44.1kHz - 192kHz / 16 Bit - 24 Bit
BluetoothHFPV1.6, A2DPV1.2, AVRCPV1.4
Dimensions18.5 x 12.2 x 3.8cm
Power inputDC24V/ 3.75A

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