Compact desktop amp with stereo and mono modes

The TOPPING Mini 500 is a fully-balanced Class D desktop power amplifier for passive speakers. It delivers up to 250W per channel into 4Ω in stereo or 500W into 2Ω in mono, with both ratings measured at THD+N below 10%. Balanced XLR/TRS and single-ended RCA inputs connect your sources, while switchable volume control and a 12V trigger help integrate it into your audio system.

A fully-balanced signal path

The Mini 500 maintains a differential signal from input to output to reduce common-mode noise and external interference. Through its balanced input, it achieves a signal-to-noise ratio and dynamic range of 126dB, with channel crosstalk of -111dB. This helps preserve quiet details and separation between channels.

Stereo power for passive speakers

A native bridge-tied load architecture provides stereo amplification without an additional bridging configuration. The Mini 500 delivers 220W per channel into 4Ω or 120W per channel into 8Ω at THD+N below 1%. Peak ratings reach 250W and 150W per channel respectively at THD+N below 10%, providing output headroom for demanding musical passages.

Mono mode for greater output

Switch the rear-panel selector to mono to drive a single speaker or passive subwoofer. Mono operation supports loads down to 2Ω, with output reaching 450W at THD+N below 1% or 500W below 10%. You can also use two Mini 500 amplifiers in a dual-mono system, assigning one amplifier to each speaker.

Low distortion across a wide bandwidth

With balanced input in stereo mode, the Mini 500 measures 0.0004% THD+N at 5W into 8Ω using an A-weighted 1kHz test. Its stereo frequency response extends from 20Hz to 40kHz within ±1.0dB, supporting high-frequency extension alongside low measured distortion.

Choose where you control volume

VOL mode lets you adjust listening levels with the front-panel analog potentiometer. BYPASS mode removes that control from the signal path and operates at fixed maximum volume, allowing your preamplifier or volume-controlled DAC to manage listening levels. Lower the upstream device’s volume before switching modes to avoid sudden high-volume output.

Connections for your existing sources

A pair of balanced XLR/6.35mm TRS combo inputs and a pair of single-ended RCA inputs accommodate DACs, CD players, and preamplifiers. Select balanced or single-ended input from the front panel. Rear-panel speaker terminals accept banana plugs for secure speaker connections.

Power control that follows your source

The 12V trigger input synchronizes power with a compatible upstream DAC or preamplifier. Set the front-panel switch to TRIG for automatic operation, or use ON/OFF for manual control.

Compact aluminum construction

The Mini 500 measures 7.48 inches wide by 6.46 inches deep by 1.73 inches high (19 × 16.4 × 4.4cm) and weighs approximately 2.40 pounds (1,090g). Its aluminum alloy chassis and heatsinks on the rear panel and bottom plate dissipate heat during sustained output, keeping substantial speaker power within a compact desktop footprint.

Product highlights

• Fully-balanced Class D amplification with native BTL architecture
  
• Stereo and mono operating modes
  
• Up to 250W per channel into 4Ω in stereo at THD+N <10%
  
• Up to 500W into 2Ω in mono at THD+N <10%
  
• Balanced XLR/6.35mm TRS combo and single-ended RCA inputs
  
• Analog volume control with selectable bypass mode
  
• 126dB SNR and dynamic range through balanced input
  
• 12V trigger input for synchronized power control
  
• Full aluminum chassis

Specs

• Product: TOPPING Mini 500
  
• Type: Fully-balanced desktop power amplifier
  
• Amplifier class: Class D
  
• Architecture: Native BTL
  
• Operating modes: Stereo / Mono
  
• Inputs: Balanced XLR/6.35mm TRS combo pair, single-ended RCA pair
  
• Speaker connections: Two pairs of banana-compatible speaker terminals
  
• Volume control: Analog potentiometer / BYPASS
  
• Trigger input: 12V
  
• Supply voltage: 53V
  
• Chassis material: Aluminum alloy
  
• Dimensions (W × D × H): 7.48 × 6.46 × 1.73 inches (19 × 16.4 × 4.4cm)
  
• Weight: Approximately 2.40 pounds (1,090g)
• Stereo output
  
  • Output power into 4Ω: 250W × 2 at THD+N <10%, 220W × 2 at THD+N <1%
    
  • Output power into 8Ω: 150W × 2 at THD+N <10%, 120W × 2 at THD+N <1%
    
  • Supported load impedance: 4–8Ω
    
  • Output level: 85Vpp into 4Ω, 92Vpp into 8Ω
    
  • Frequency response: 20Hz–20kHz (±0.3dB), 20Hz–40kHz (±1.0dB)
    
  • Noise (A-weighted): <17µVrms
    
  • Channel balance: 0.1dB
• Stereo performance with balanced input
  
  • THD+N (1kHz, A-weighted): 0.0005% at 5W into 4Ω, 0.0004% at 5W into 8Ω
    
  • THD+N (unweighted, 20kHz bandwidth): 0.0050% at 5W into 4Ω, 0.0040% at 5W into 8Ω
    
  • SNR (maximum output, 1kHz, A-weighted): 126dB
    
  • Dynamic range (1kHz, A-weighted): 126dB
    
  • Channel crosstalk (1kHz): -111dB
    
  • Input sensitivity: 4.0Vrms
    
  • Gain: 19.8dB
    
  • Input impedance: 6.8kΩ
• Stereo performance with single-ended input
  
  • THD+N (1kHz, A-weighted): 0.0006% at 5W into 4Ω, 0.0005% at 5W into 8Ω
    
  • THD+N (unweighted, 20kHz bandwidth): 0.0050% at 5W into 4Ω, 0.0040% at 5W into 8Ω
    
  • SNR (maximum output, 1kHz, A-weighted): 123dB
    
  • Dynamic range (1kHz, A-weighted): 123dB
    
  • Channel crosstalk (1kHz): -98dB
    
  • Input sensitivity: 2.0Vrms
    
  • Gain: 25.7dB
    
  • Input impedance: 1.0kΩ
• Mono output
  
  • Output power into 2Ω: 500W × 1 at THD+N <10%, 450W × 1 at THD+N <1%
    
  • Output power into 4Ω: 300W × 1 at THD+N <10%, 240W × 1 at THD+N <1%
    
  • Output power into 8Ω: 150W × 1 at THD+N <10%, 120W × 1 at THD+N <1%
    
  • Supported load impedance: 2–8Ω
    
  • Output level: 84Vpp into 2Ω, 89Vpp into 4Ω, 92Vpp into 8Ω
    
  • Frequency response: 20Hz–20kHz (±0.3dB)
    
  • Noise (A-weighted): 17µVrms
    
  • THD+N (20kHz bandwidth, either input): 0.0050% at 5W into 4Ω, 0.0040% at 5W into 8Ω
• Mono performance with balanced input
  
  • THD+N (1kHz, A-weighted): 0.0009% at 5W into 2Ω, 0.0007% at 5W into 4Ω, 0.0005% at 5W into 8Ω
    
  • SNR (maximum output, 1kHz, A-weighted): 126dB
    
  • Dynamic range (1kHz, A-weighted): 126dB
    
  • Input sensitivity: 4.0Vrms
    
  • Gain: 19.8dB
    
  • Input impedance: 6.8kΩ
• Mono performance with single-ended input
  
  • THD+N (1kHz, A-weighted): 0.0010% at 5W into 2Ω, 0.0008% at 5W into 4Ω, 0.0005% at 5W into 8Ω
    
  • SNR (maximum output, 1kHz, A-weighted): 123dB
    
  • Dynamic range (1kHz, A-weighted): 123dB
    
  • Input sensitivity: 2.0Vrms
    
  • Gain: 25.7dB
    
  • Input impedance: 1.0kΩ

What’s included

• Mini 500 power amplifier
  
• Power adaptor
  
• Power cable
  
• Product information card