Violectric HPA V550 Headphone Amp

General

• Ekster
• Supply voltage:  115 V AC 
• Case dimensions: 11.4 x 3.2 x 9.8 in (29 x 8 x 24.8 cm) 
• Overall dimensions: 11.4 x 3.5 x 10.8 in (29 x 9 x 27.5 cm) 
• Headphone outputs (both channels driven: 600 ohms at 740 mW (21, 1 V and 28, 7 dB), 300 ohms at 1,450 mW (20, 9 V and 28, 6 db), 100 ohms at 4,300 mW (20, 7 V and 28, 5 dB), 50 ohms at 6,400 dB (17, 9 V and 27, 3 dB), 32 ohms at 4,700 mW (12, 3 V and 24, 0 dB), 16 ohm at 2,000 mW (5, 7 V and 17, 3 dB)
• All Data RMS weighted 20 Hz - 20 kHz, pre-gain set to 0 dB

Analog Inputs

• Analog inputs (stereo): (1) XLR female, balanced, (2) RCA (unbalanced)
• Maximum input voltage: + 21 dBu (10-kohm input impedance)

Line Outputs

• Line outputs (stereo, analog): (1) XLR male, balanced, (1) RCA (unbalanced) 
• Line output gain levels: -18, -12, -6, 0, +6, +12, +18 dBr 
• Maximum output voltage: + 21 dBu (1-ohm output impedance)

Headphone Amp

• Nominal input sensitivity: +6 dBu 
• Feedback gain: 0 dB (unbalanced), +6 dB (balanced)
• Pre-gain levels: -18 / -12 / -6 / 0 / +6 / +12 / +18 dBr 
• Frequency response range: 5 Hz – 250 kHz 
• Balance: ±6 dB 
• Output impedance: 0, 15 ohms (unbalanced), 0, 3 ohms (balanced)
• Damping factor (50-ohm load): 320 (unbalanced), 160 (balanced) 
• Dynamic range: > 131 dB (A-weighted) 
• Noise: < -103 dBu (A-weighted)  
• THD+N (1kHz / 2 x 10V / 100R = 1W): < -102 dB, < 0,0008% 
• THD+N (1kHz / 2 x 4V / 32R = 0,5W) : < -100 dB / < 0.001% 
• Crosstalk: -105 dB at 1 kHz, -100 dB at 15 kHz 
• Headphone outputs: (1) 4-pin XLR, (2) ¼-in (6.3 mm) jack