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HEADPHONES AMPLIFIERS





U4410



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THREE OUTPUT HEADPHONES AMPLIFIER




The U4410 is a stereophonic headphone amplifier designed for monitoring applications. Its three independent outputs are fed by three stereophonic amplifiers, each with its own level adjustment.
Our specific amplifier design provides a large power headroom and a high signal to noise ratio.  An internal switch adjusts the impedance (50 ohms or 600 ohms) to match the headphone specification.

The U4410 can handle all the dynamics of today's digital recordings without distortion.

Two indicators (OVER LEFT/RIGHT) monitor the input signal. They light up when the input level reaches 6dB below clipping, or if a DC offset is present in the input signal, or in case of output stage overload.
Thanks to two combo style inputs (XLR symmetrical or 6.35 mm JACK) located on the rear panel, the amplifier U4410 is easily connected to any modulation source. The output jack connectors are located on the front of the unit below each level control.



front panel  


rear panel 



SPECIFICATIONS

 Amplifiers Section

INPUTS Balanced / Left & Right
Structure Transformerless.
Impedance Differential 10 kOhms +/- 3%.
Common 5 kOhms +/-3%.
Nominal Level +4 dBm, 1.2 Volts rms.
Maximum Level +28 dBm, 19.4 Volts rms.
Protection Against phantom power.
Connector XLR Combo Connector / XLR female.

INPUTS Unbalanced / A & B
Structure Transformerless.
Impedance 2 kOhms +/- 3%.
Nominal Level +4 dBm, 1.2 Vrms.
Maximum Level +14 dBm, 3.9 Vrms.
Protection Against phantom power.
Connector  XLR Combo Connector / 6.35 mm JACK stereophonic.

OUTPUTS
Impedance 50 Ohms to 600 Ohms.
Protection Against short circuit to ground.
Nominal level  +13.9 dBm, 3.8 Vrms, 300 mWatt, 50 Ohms load.
 +18.7 dBm, 6.7 Vrms, 300 mWatt, 150 Ohms load.
 +21.7 dBm, 9.4 Vrms, 300 mWatt, 300 Ohms load.
Maximum level For 0.5% distorsion :
  +19.2 dBm, 7.0 Vrms, 1000 mWatt, 50 Ohms load.
  +21.7 dBm, 9.5 Vrms, 600 mWatt, 150 Ohms load.
  +21.8 dBm, 9.6 Vrms, 310 mWatt, 300 Ohms load.
  +22.0 dBm, 9.8 Vrms, 160 mWatt, 600 Ohms load.
Connector  6.35 mm JACK stereophonic.

TRANSFER
Crosstalk L/R > 80 dB from 10 Hz to 20 kHz.
Gain 16 dB on balanced inputs.
Gain missmatch L/R  < 0.2 dB from 20 Hz to 20 kHz.
Bandwidth 20 Hz to 20 kHz @ +/- 0.3 dB, full power.
Rise time 2 æs.
Phase shift < -1ø from 20Hz to 1kHz.
< -8ø @ 10 kHz.
< -13ø @ 20 kHz.
Common mode rejection > 60 dB @ 20 kHz / gain 0 dB.
> 88 dB @ 20 kHz / gain 30 dB.
Signal to Noise ratio 110 dB @ +4 dBm input, 20 Hz to 20 kHz, potentiometer on median position.
125 dB @ +20 dBm input, 20 Hz to 20 kHz, potentiometer on median position.
Residual noise -115 dBm, 20 Hz to 20 kHz, potentiometer on median position.
-100 dBm, 20 Hz to 20 kHz, potentiometer on maximal position.
Distortion @ 1 kHz 0.020 % @ 300 mWatt, 50 Ohms.
0.015 % @ 300 mWatt, 150 Ohms.
0.015 % @ 300 mWatt, 300 Ohms.
0.015 % @ 150 mWatt, 600 Ohms.
 
Common Section

GENERAL
Mains Power Supply 230 VAC or 120 VAC (set internally).
45 Hz to 65 Hz frequency.
Consumption < 10 W.
FRB Connector (option 80).
CEI Connector (option 81).
Indicators OVER - 6 dB before clipping.
POWER ON - Power supply is correct.
Temperature  -10 øC / +40 øC operation.
-20 øC / +60 øC storage.
Size 220 x 170 x 55 mm.
Weight 1600 g.
 
Download U4410 User's Manual - English version
Download U4410 User's Manual - French version
Download AN102 Application Note - French version
 ADAPTATION D'UNE SORTIE ANALOGIQUE ASYMETRIQUE SUR UNE ENTREE ANALOGIQUE SYMETRIQUE

Due to permanent technical improvements, specifications listed here can change without prior notification.