HA-618 Headphone Amplifier

  • Headphone Amplifier
  • Mountable in a 19" Rack Unit 

  • 6 individual headphone channels 

  • Input gain control, and individual output gain control 

  • Up to 3 headphone outputs per channel for a total of 18 headphones 

  • "Direct In" and "Headphone Output" on the front panel for easy operation when mounted in a rack 

  • Input and Output Level LED Meter 

  • Balanced Control to mix up the Main In and the AUX In signal 

  • Main outputs for connecting with additional unit headphone amplifiers 

  • High-end quality even at high volume levels 

  • Exceptionally rugged construction ensures long life and durability 

  • Universal and professional headphone amplification system for studio and stage application

Product Detail

  • Specification
  • Application
MAIN INPUT
• Connector: XLR and 1/4" jack
• Type: HF filter, servo-balanced input
• Impedance: 50 kOhms balanced, 25 kOhms unbalanced
• Max. Input Level: +21 dBu balanced and unbalanced
• CMRR: typ. 40 dB, >55 dB @ 1KHz
AUX IN & DIRECT IN INPUT
• Connectors: 1/4" TRS (tip=left, ring=right, sleeve=ground)
• Type: Unbalanced
• Impedance: 25 kOhms unbalanced
• Max. Input Level: +21 dBu unbalanced
• CMRR: typ, 40 dB: >55 dB @ 1 KHz
OUTPUT
• Connectors: XLR and 1/4" jack
• Type: Balanced and Unbalanced
• Impedance: Depending on the input impedance
• Max. Output Level: +21 dBu Balanced and Unbalanced
SYSTEM SPECIFICATIONS
• Frequency Response: 10 Hz to 50 Khz, +/-3 dB
• Noise: >90dB, Unweighted, 22 Hz to 22 KHz (>[email protected]+4 dBu)
• THD: 0.005% [email protected]+4 dBu, 1KHz, Gain 1
POWER AMPLIFIER
• Max. Output Power: +21 dBm
• Min. Output Impedance: 8 Ohms 
• Max. Gain: +20dB
FUNCTION CONTROLS
• Input Level: Variable
• Balanced Per Channel: Mix between aux and main signal
• Output Level Per Channel: Variabl
Recording, broadcasting, live performance
  • Specification
  • Application
MAIN INPUT
• Connector: XLR and 1/4" jack
• Type: HF filter, servo-balanced input
• Impedance: 50 kOhms balanced, 25 kOhms unbalanced
• Max. Input Level: +21 dBu balanced and unbalanced
• CMRR: typ. 40 dB, >55 dB @ 1KHz
AUX IN & DIRECT IN INPUT
• Connectors: 1/4" TRS (tip=left, ring=right, sleeve=ground)
• Type: Unbalanced
• Impedance: 25 kOhms unbalanced
• Max. Input Level: +21 dBu unbalanced
• CMRR: typ, 40 dB: >55 dB @ 1 KHz
OUTPUT
• Connectors: XLR and 1/4" jack
• Type: Balanced and Unbalanced
• Impedance: Depending on the input impedance
• Max. Output Level: +21 dBu Balanced and Unbalanced
SYSTEM SPECIFICATIONS
• Frequency Response: 10 Hz to 50 Khz, +/-3 dB
• Noise: >90dB, Unweighted, 22 Hz to 22 KHz (>[email protected]+4 dBu)
• THD: 0.005% [email protected]+4 dBu, 1KHz, Gain 1
POWER AMPLIFIER
• Max. Output Power: +21 dBm
• Min. Output Impedance: 8 Ohms 
• Max. Gain: +20dB
FUNCTION CONTROLS
• Input Level: Variable
• Balanced Per Channel: Mix between aux and main signal
• Output Level Per Channel: Variabl
Recording, broadcasting, live performance