Topping A30 Pro Headphone Amplifier

 General

• Topping
• Output power: 6 W x 2 (16 ohms, THD+N <0.1%); 5,500 mW x 2 (32 ohms, THD+N <0.1%); 840 mW x 2 (300 ohms, THD+N <0.1%)
• Inputs: XLR (left and right), RCA 
• Outputs: 4-pin XLR, 4.4 mm, 6.35 mm
• Bypass output (when power off)
• Passthrough outputs: 6.35mm TRS (left and right), RCA
• THD+N: < 0.00006%
• Noise: < 0.3 uVrms
• Power: 100 – 240 VAC, 50 Hz / 60 Hz
• Gain settings: Low (-14 dB), Medium (0 dB), High (+14 dB)
• Power consumption: < 9 W
• Adapter impedance: > 8 ohms
• Weight: 1.9 lbs (0.87 kg)
• Dimensions: 6.85 x 5.4 x 1.7 in (17.4 x 13.8 x 4.5 cm)

Single-Ended Input

• THD + N (1 kHz A-weighted): <0.00007% (3.5 W, 32 ohms); <0.00006% (90 mW, 300 ohms)
• THD (20 Hz – 20 kHz, 90 kBW): <0.00008% (760 mW, 32 ohms); <0.00007% (81 mW, 300 ohms)
• SNR (maximum output, 1kHz A-weighted): 145 dB
• SNR (50 mV output, 1kHz): 104 dB
• Dynamic range (1 kHz A-weighted): 145 dB
• Frequency response: 20 Hz – 40,000 Hz (± 0.05 dB)
• Output level: 34 Vpp (low gain), 34 Vpp (medium gain), 45 Vpp (high gain)
• AP-measured noise level (A-weighted): < 0.7 uVrms (low gain), 0.7 uVrms (medium gain), 1.2 uVrms (high gain)
• Actual noise level: < 0.3 uVrms (low gain), < 0.3 uVrms (medium gain), < 0.9 uVrms (high gain)
• Channel crosstalk (1 kHz): -106 dB
• IMD CCIF (18 kHz + 19 kHz): -116 dB
• IMD SMPTE (60 Hz + 7 kHz): -110 dB (SMPTE 4:1), -115 dB (SMPTE 1:1)
• Input sensitivity: 60 Vrms (low gain), 12.6 Vrms (medium gain), 2.7 Vrms (high gain)
• Gain: -14 dB (low gain), 0 dB (medium gain), 14 dB (high gain)
• Output impedance: < 0.1 ohms

Balanced Input

• THD + N (1 kHz A-weighted): <0.00007% (3.2 W, 32 ohms), <0.00006%  (86 mW, 300 ohms)
• THD (20 Hz – 20 kHz, 90 kBW): <0.00008% (760 mW, 32 ohms), <0.00007% (81 mW, 300 ohms)
• SNR (maximum output, 1kHz A-weighted): 140dB
• SNR (50 mV output, 1kHz): 104 dB
• Dynamic range (1 kHz A-weighted): 140 dB
• Frequency response: 20 Hz – 40,000 Hz (± 0.1 dB)
• Output level: 6.6 Vpp (low gain), 34 Vpp (medium gain), 45 Vpp (high gain)
• AP-measured noise level (A-weighted): < 0.7 uVrms (low gain), < 0.7 uVrms (medium gain), 1.2 uVrms (high gain)
• Actual noise level: < 0.3 uVrms (low gain), < 0.3 uVrms (medium gain), < 1.1 uVrms (high gain)
• Channel crosstalk (1 kHz): -101 dB
• IMD CCIF (18 kHz + 19 kHz): -116 dB
• IMD SMPTE (60 Hz + 7 kHz): -110 dB (SMPTE 4:1), -116 dB (SMPTE 1:1)
• Input sensitivity: 12.7 Vrms (low gain), 12.7 Vrms (medium gain), 2.7 Vrms (high gain)
• Gain: -14 dB (low gain), 0 dB (medium gain), 14 dB (high gain)
• Output impedance: < 0.1 ohms

Manufacturer’s Note

• The actual noise level is obtained by boosting the noise of the A30 Pro by 40 dB using a low noise amplifier in front of the APx555B and then dividing the measured noise by 100 times

• AC power cable
• 6.35 mm to 3.5 mm adaptor
• Owner’s manual