Topping MX3S: Amplifier with aptX Adaptive 2×50 W on AK4377

The Topping MX3S is a true audio combine, serving as both an amplifier and a headphone amplifier with a built-in AKM AK4377 DAC and Bluetooth receiver. An ideal model for a small to medium listening room, capable of delivering dynamic, accurate and faithful reproduction.

Thanks to the presence of a subwoofer output in RCA format, the MX3S can be used to organize a 2.1 audio system. Using a subwoofer allows you to achieve deep and punchy bass.

Topping MX3S digital inputs feature automatic input signal detection. This allows the device to automatically turn on when it receives an audio signal and turn off if no valid signal is received within one minute.

In addition to full connectivity, Topping MX3S is equipped with a Bluetooth receiver, allowing you to remotely stream music from, for example, a smartphone or tablet. The chip used supports aptX, aptX HD and aptX Adaptive transmission codecs, facilitating high-quality wireless audio playback.

The MX3S amplifier section uses an Infineon Merus Class D chip, which allows it to deliver 2x50W of power under a 4Ω load with a high efficiency of over 90%. It also offers a characteristic restitution of excellent clarity and precision. The MX3S also offers two-level gain control to adapt to your listening system.

To adapt to your audio system, Topping MX3S is equipped with a built-in equalizer. It allows you to adjust the bass and treble levels in the range from -10 dB to +10 dB.

Topping MX3S Features:

• Product Type: Amplifier/Headphone Amplifier/DAC
• Inputs: Bluetooth/1* stereo RCA/1* coaxial/1* optical Toslink/1* USB-C
• Outputs: Stereo speaker output/1* Mono RCA subwoofer output/1* Jack 3.5 mm headphone output.
• Supported sampling rates: PCM up to 24 bit 192 kHz
• Supported Bluetooth Codecs: AAC, SBC, aptX, aptX-HD, aptX Adaptive Headphone Amplifier Specifications USB / Optical / Coaxial Input AUX Bluetooth (aptX Adaptive)
• THD+N @ 1 kHz (A-wt) 0.003% @ 270 mW, 32 ohms / 0.001% @ 30 mW, 300 ohms 0.003% @ 270 mW, 32 ohms / 0.002% @ 30 mW, 300 ohms
• SNR @ max out, 1 kHz (A-wt) 115 dB 127 dB 115 dB
• Dynamic range @ 1 kHz (A-watt) 115 dB 127 dB 115 dB
• Frequency response 20Hz-20kHz (+0.1dB/-0.3dB)/20Hz-40kHz (+0.1dB/-1.0dB) 20Hz-20kHz (+0dB/-2dB)
• Output Level 3.4Vpp @ G=L/15.6Vpp @ G=H 10.2Vpp @ G=L/14.4Vpp @ G=H 3.4Vpp @ G=L/15.6Vpp @ G=H
• Noise (A-wt) 2.0µVrms @ G=L/ 7.0µVrms @ G=H 2.0µVrms @ G=L/ 7.0µVrms @ G=H 2.0µVrms @ G=L/ 7.0µVrms @ G=H
• Crosstalk @ 1 kHz -90 dB
• Input sensitivity 0dBFS @ G=L/0dBFs @ G=H 4.2Vrms @ G=L/1.2Vrms @ G=H 0dBfS @ G=L/0dBFs @ G=H
• Gain 2 dB (Vrms/FS) @ G=L/14.8 dB (Vrms/FS) @ G=H -0.2 dB @ G=L/12.6 dB @ G=H 2 dB (Vrms/FS) @ G=L/ 14.8 dB (Vrms/FS) @ G=H
• Output impedance 0.5 ohm
• Output Power 2,700mW @ 32 Ohm, THD+N 1%/2,400mW @ 62 Ohm, THD+N 1%/2*100mW @ 300 Ohm, THD+N 1%
• Load impedance > 8 ohms Amplifier specifications USB / optical / coaxial input AUX Bluetooth (aptX Adaptive)
• THD+N @ 1 kHz (A-wt) 0.005% @ 5 W, 4 ohms / 0.004% @ 5 mW, 8 ohms
• SNR @ maximum output, 1 kHz (A-wt) 110 dB
• Dynamic range @ 1 kHz (A-wt) 110 dB
• Frequency response 20Hz-20kHz (+0.1dB/-0.-dB)/20Hz-40kHz (+0.1dB/-1.5dB) 20Hz-20kHz (+0dB/-2dB)
• Output level 40Vpp @ 4 ohms / 44Vpp @ 8 ohms
• Noise (A-wt) 60µVrms @ G=L/ 100µVrms @ G=H
• Crosstalk @ 1 kHz -90 dB
• Input sensitivity -2.0dBFS @ G=L/-8.0dBFs @ G=H 1.0Vrms @ G=L/0.5Vrms @ G=H -2.0dBfS @ G=L/-8.0dBFs @ G=H
• Gain 26.5 dB (Vrms/FS) @ G=L/32.5 dB (Vrms/FS) @ G=H 24 dB @ G=L/30 dB @ G=H 26.5 dB (Vrms/FS) @ G=L/32.5 dB (Vrms/FS) @ G=H
• Output impedance 0.2 ohm
• Output Power 2 62 W @ 4 Ohms, THD+N 10%/2 50 mW @ 4 Ohms, THD+N 1%/2 40 W @ 8 Ohms, THD+N 10%/2 30 W @ 8 Ohms, THD+ N 1%
• Load resistance 4-8 Ohm
• Supply voltage: 26V DC (power supply included)
• Dimensions: 120x165x40 mm
• Color: black or silver

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