TOPPING MX5 Multi-Function Power Amplifier

The TOPPING MX5 is a power amplifier, headphone amplifier, and DAC all rolled into one. We’re not playing around when we say “Multi-Function.” TOPPING has actually put two amplifiers into this one unit: an NFCA headphone amplifier that outputs on the front plate and a Merus Class-D power amplifier that outputs on the back. Throw in an ESS SABRE DAC chip, Bluetooth 5.0, and an 8-core XMOS chip, and you’ve got a true do-it-all system. 

Built-in ESS SABRE HiFi DAC

With its ESS SABRE DAC chip, XMOS XU208 USB chip, and Qualcomm QCC3031 Bluetooth 5.0 chip, the MX5 accepts input connections from a variety of audio sources, including computers, set-top boxes, CD players, mobile phones, and more. 

Balanced and single-ended inputs

In addition to supporting various digital inputs, the MX5 also supports fully-balanced TRS and single-ended RCA analog inputs. 

Auto on/off

The MX5 features an Auto On/Off function for all inputs. When a valid signal is detected, the unit turns on. When the valid signal is lost, the unit shuts down. 

Merus Class D amplifier

With the help of an Infineon Merus Class D amplifier, the MX5 can output 70W x2 under a 4Ω load with 10% distortion, and 55W x2 under a 4Ω load with 1% distortion. Under an 8Ω load, the MX5 can output 42W x2 with 10% distortion or 35W x2 with 1% distortion. 

NFCA headphone amplifier

The MX5 has an NFCA circuit with ultra-low noise and distortion. It pairs with high-sensitivity IEMs and power-hungry high-impedance headphones perfectly. 

Built-in EQ function

Adjust the treble and bass from -10dB to +10dB. 

2-step gain setting

In order to adapt to input signals with different strengths, the MX5 provides two-step gain settings for both power amplifiers and headphone amplifiers. The gain can be set on the remote control. 

Custom setting memory 

The MX5 provides two custom setting memories, C1 and C2. Long press either button to store the current input selection, output selection, volume setting, bass setting, treble setting, and gain setting. Short press the button to recall the saved settings. 

Product highlights

• 4x digital, 2x analog inputs
• 70W x2 Merus Class D
• 1600mW x2 NFCA HPA
• Bass and treble EQ
• Auto on/of function
• Built-in DAC
• Qualcomm QCC3031 Bluetooth 5.0 chip
• Remote control

Specs

NFCA Heapdhone amplifier specs

• THD+N @1kHz (A-wt)
  • USB/OPT/COAX
    • <0.0030% @output=750mW (32Ω)
    • <.0008% @output=80mW (300Ω)
  • SE
    • <0.0030% @output=750mW (32Ω)
    • <0.0020% @output=80mW (300Ω)
  • BAL
    • <0.0030% @output=750mW (32Ω)
    • <0.0020% @output=80mW (300Ω)
• SNR @MAX OUT 1kHz (A-wt)
  • USB/OPT/COAX: 120dB
  • SE: 128dB
  • BAL: 127dB
• Dynamic range @1kHz (A-wt) 
  • USB/OPT/COAX: 120dB
  • SE: 129dB
  • BAL: 127dB
• Frequency response: 20Hz - 20kHz (+0.1dB/ -0.3dB), 20Hz - 40kHz (+0.1dB/ -1dB)
• Output level
  • USB/OPT/COAX
    • Low gain: 5.6Vpp
    • High gain: 24.6Vpp 
  • SE
    • Low gain: 10.6Vpp
    • High gain: 24.6Vpp
  • BAL
    • Low gain: 10.6Vpp
    • High gain: 24.6Vpp
• Noise @A-wt 
  • Low gain: <2.0uVrms
  • High gain: <10.0uVrms 
• Channel crosstalk @1kHz: -93dB
• Input sensitivity 
  • USB/OPT/COAX
    • Low gain: 0dBFS
    • High gain: -1dBFS
  • SE
    • Low gain: 3.9Vrms
    • High gain: 1.8Vrms
  • BAL
    • Low gain: 7.8Vrms
    • High gain: 3.6Vrms 
• Gain 
  • USB/OPT/COAX
    • Low gain: 6.0dB (Vrms/FS)
    • High gain: 19dB (Vrms/FS)
  • SE
    • Low gain: -0.2dB
    • High gain: 13.6dB
  • BAL
    • Low gain: -6.1dB
    • High gain: 7.6dB
• Output impedance: <0.2Ω
• Output power
  • 1600mW x2 @32Ω THD+N<0.1% 
  • 1000mW x2 @64Ω THD+N<0.1%
  • 260mW x2 @300Ω THD+N<0.1% 
• Load impedance: >8Ω

Merus Class D amplifier specs

• THD+N @1kHz (A-wt)
  • <0.005% @output=5W (4Ω)
  • <0.004% @output=5W (8Ω)
• SNR @MAX OUT 1kHz (A-wt): 110dB
• Dynamic range @1kHz (A-wt): 110dB 
• Frequency response: 20Hz - 20kHz (+0.1dB/-0.5dB), 20Hz - 40kHz (+0.1dB/ -1.5dB)
• Output level
  • 42Vpp @RL=4Ω
  • 46Vpp @RL=8Ω 
• Noise @A-wt
  • Low gain: <60uVrms 
  • High gain: <90uVrms 
• Channel crosstalk
  • USB/OPT/COAX: -93dB
  • SE: -90dB
  • BAL: -91dB
• Input sensitivity 
  • USB/OPT/COAX
    • Low gain: -1.5dBFS
    • High gain: -7dBFS
  • SE
    • Low gain: 1,7Vrms 
    • High gain: 0.9Vrms 
  • BAL
    • Low gain: 3.5Vrms 
    • High gain: 1.8Vrms 
• Gain 
  • USB/OPT/COAX
    • Low gain: 25.2dB (Vrms/FS)
    • High gain: 30.7dB (Vrms/FS)
  • SE
    • Low gain: 19dB
    • High gain: 24.5dB
  • BAL
    • Low gain: 13dB
    • High gain: 18.5dB
• Output impedance: <0.2Ω
• Output power
  • 70W x2 @4Ω THD+N<10%
  • 55W x2 @4Ω THD+N<1%
  • 42W x2 @8Ω THD+N<10%
  • 35W x2 @8Ω THD+N<1% 
• Load impedance: 4-8Ω

What’s included

• TOPPING MX5
• Power adapter 
• Power cable
• USB cable
• 6.35mm to 3.5mm adapter 
• Remote control
• Bluetooth antenna
• User manual
• Warranty card