U4410 User`s Manual
Contents
1. cable 6 Power cord 6 POWER ON 8 R Rear power switch 6 Residual noise 6 S Safety 6 Short circuit protected 10 Sound pressure 6 STEREO A 9 STEREO B 9 Stereophonic headphones 3 Stereophonic input A 9 Stereophonic input B 9 T Temperature 6 U UNBALANCED 10 W Warranty 4 Warning 6 MCN AUDIO U4410 HEADPHONES AMPLIFIER MCN AUDIO On line WWW NC N atulglo Coln Document Code UM EV U4410D V4 122. external sound signals can impair your safety Never connect headphones you are wearing to any output whose level is not adjusted to zero Residual noise at the outputs of the U4410 is almost imperceptible Do not assume that this absence of noise means volume controls are set to zero GROUND CONNECTIONS This equipment is designed to be used with an earth connection It must be connected only to a main socket providing a functional earth connection The metallic case and the electronic ground potential of this equipment are connected to the earth Even if stereophonic inputs A and B on the rear panel are independent the ground connection is common for both A and B connectors and linked to the metallic case of the instrument MCN AUDIO U4410 HEADPHONES AMPLIFIER SYNOPTIC Left and Right channels are identical INPUTS IN RIGHT LEVEL AMPLIFIERS PHONES OUTPUTS STEREO O IN LEFT TO LEFT CHANNEL POWER ON LED LAMPS OVER LEFT RIGHT MCN AUDIO U4410 HEADPHONES AMPLIFIER 8 FRONT PANEL OVER LEFT RIGH POWER ON The blue ON pilot light is lit when the unit is ON When the rear power switch is set to OFF the unit is disconnected from the power The power cable can stay plugged in without risk OVER LEFT Channel LEFT overload pilot light This led lights when the signal is 6 dB below clipping corresponding to a 14 dBm signal on the balanced inputs the output amplifier is cli
3. so as to minimize gain and phase alterations which normally occur at the limits of the audible range An internal control loop automatically trims the bias point of the amplifiers This function is able to cancel a residual DC input voltage up to 200 mV Above 100 mV of input DC voltage the OVER pilot lamp lights up even if no audio signal is applied at the input In case the OVER pilot lamps light up as soon as the amplifier is connected to a source even if no audio signal is present check for DC residual voltage at the source output Using the U4410 on such source can cause damage to your headphones MCN AUDIO U4410 HEADPHONES AMPLIFIER INDEX B Balanced 9 BALANCED INPUTS 10 Bandwidth 10 Bias point 10 C Combo 3 Clipping 8 D DC level 8 DC residual voltage 10 E Earth connection 6 9 Gain differences 10 Ground 6 GROUND CONNECTIONS 6 H Headphones 8 HEADPHONES Safety Warning 6 HEADPHONES OUTPUTS 10 Hearing damages 6 High impedance 8 10 l Independent outputs 3 Indicators 3 IN LEFT 9 Input protection 10 IN RIGHT 9 Internal fuse 6 L Low impedance 8 10 M Mains network voltage 6 Mains power switch 9 Mains voltage 6 Maximum level 10 Metallic case 6 9 Mix 9 11 N Nominal input level 10 O ON pilot light 8 Outputs 10 OVER LEFT 8 Overload pilot light 8 OVER RIGHT 8 P Phantom power 10 Phase shift 10 PHONES OUTPUTS 8 POWER 9 Power
4. G The mains voltage is preset to the value indicated on the rear panel Please check that the voltage value indicated on the rear panel matches the main network voltage Main voltage is set internally To change this setting please contact your local dealer or MCN AUDIO technical support MAIN CONNECTION Connect the power cable at the rear of the units and check that the connector is fully inserted and locked Then plug the cable on a main network socket providing an earth connection Do not use the equipement if the power cord is damaged if the equipment as experienced a severe mechanial shock or if it is visually damaged This equipment is protected by an internal fuse Use a fuse of the same rating in case of replacement SWITCHING ON The power is applied to the amplifier by toggling the rear power switch In the OFF position the unit is completely disconnected from the mains network It can stay connected without risk TEMPERATURE IN OPERATION An increase of the case temperature is normal when the instrument is connected to the power network and switched on HEADPHONES SAFETY WARNING The sound pressure headphones can deliver when connected to this amplifier is very high Avoid using headphones at a high level for a long period as it may permanently damage your hearing When used at a high level external sounds become undetectable specifically on closed frame headphones Avoid using headphones at a high level if missing
5. LEFT Balanced XLR male connector for left channel 1 GROUND 2 HOT 3 COLD POWER Main power switch CEI main input connector This equipment is designed to be used with an earth connection It must be connected only to a main socket providing a functional earth connection The metallic case and the electronic ground potential of this equipment are connected to the earth MCN AUDIO U4410 HEADPHONES AMPLIFIER 10 INPUT AND OUTPUT LEVELS BALANCED INPUTS The maximum level that can be applied on the balanced inputs is 28 dBm Above this level the signal is limited by the input protection network The purpose of this network is an active protection in case phantom power is accidentally applied to the amplifier The nominal input level is the standard 4 dBm UNBALANCED STEREOPHONIC INPUTS The maximum level that can be applied on the unbalanced stereophonic inputs is 20 dBm The nominal level is 10 dBm These inputs can be directly connected to headphones outputs of almost any equipment with their output level set to their midrange position HEADPHONES OUTPUTS Outputs are short circuit protected According to the impedance of the headphones connected the available power ranges from 150 to 300 mWatts An internal setting allows compensation for the level difference which is encountered when using high and low impedances headphones of this amplifier BANDWIDTH The bandwidth of the U4410 is deliberately very large
6. MCN AUDIO U4410 HEADPHONES AMPLIFIER USER S MANUAL OPTIONS Option 96 Service Manual Option 80 FRB Mains Connector Option 81 CEI Mains Connector ACCESSORIES W1101 80 Power cord 2 5m length FRB connector W1101 81 Power cord 2 5m length CEI connector SERIAL NUMBER MCN AUDIO U4410 HEADPHONES AMPLIFIER CONTENT GENERALITIES WARRANTY SPECIFICATIONS PRECAUTIONS HEADPHONES Safety Warning SYNOPTIC FRONT PANEL REAR PANEL Option 81 INPUT AND OUTPUT LEVELS BANDWIDTH INDEX Due to permanent technical improvements specifications listed here can change Without prior notification MCN AUDIO U4410 HEADPHONES AMPLIFIER 3 GENERALITIES The U4410 is a stereophonic headphones amplifier designed for monitoring applications Its three independent outputs are fed by three stereophonic amplifiers each with its own level adjustment on the front panel An internal switch adjusts the impedance 50 ohms or 600 ohms to match the headphone specification A specific amplifier design provides a large power headroom and a high signal to noise ratio 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 if a DC offset is present in the input signal or in case of output stage overload Thank
7. pping the input signal carries a DC level greater than 100mV OVER RIGHT Channel RIGHT overload pilot light This led lights when the signal is 6 dB below clipping corresponding to a 14 dBm signal on the balanced inputs the output amplifier is clipping the input signal carries a DC level greater than 100 mV PHONES OUTPUTS Headphones 6 35 mm JACK output connectors Three headphones can be connected simultaneously fed by three independent amplifiers with independent volume controls An internal setting allows low impedance 50 ohms or high impedance 600 ohms headphones configuration High impedance is the default setting L_GROUND L RIGHT MCN AUDIO U4410 HEADPHONES AMPLIFIER 9 REAR PANEL Option 81 Male XLR or 6 35 mm JACK connectors can be plugged in the input sockets STEREO A Stereophonic 6 35 mm JACK connector for unbalanced stereophonic input A STEREO B Stereophonic 6 35 mm JACK connecfor for unbalanced stereophonic input B Stereophonic inputs A and B are independent 15 LEFT Two programs can be fed on stereophonic inputs A and B In such case the sum the mix of these programs will be L_crounp L RIGHT heard on the headphones Even if stereophonic inputs A and B are independent the ground connection is common for both sockets A and B and linked to the metallic case of the unit IN RIGHT Balanced XLR male connector for right channel 1 GROUND 2 HOT 3 COLD IN
8. s to two combo style inputs XLR balanced or 6 35 mm JACK unbalanced located on the rear panel the amplifier U4410 is easily connected to any modulation source such as mixing equipment dispatching or even to another headphones output MCN AUDIO U4410 HEADPHONES AMPLIFIER WARRANTY This equipment is warranted against defects in material and workmanship for a period of five 5 years from date of delivery The warranty will be voided if the unit is tampered with or serviced by unauthorized personnel MCN AUDIO U4410 HEADPHONES AMPLIFIER 5 SPECIFICATIONS INPUTS Balanced Two channels Nominal level Maximum level Balanced impedance Common mode impedance Protection Connectors Unbalanced Two channel Nominal level Maximal level Impedance Connectors OUTPUTS Unbalanced Maximum level Nominal level Impedance Connectors TRANSFER Bandwidth Rise Fall time Phase shift Maximum gain Distorsion at 1kHz Signal to noise ratio Residual noise GENERAL Power Supply Indicators Operating temperature Storage temperature Size Weight transformerless left and right inputs 4 dBm 1 2 Vrms 28 dBm 19 4 Vrms 10 kOhms 5 kOhms Against phantom power 3 point female XLR independant stereophonic inputs 4 dBm 1 2 Vrms 14 dBm 3 9 Vrms 2 kOhms 2 stereophonic 6 35mm JACK for 0 5 distorsion 19 2 dBm 7 0 Vrms 1000 mWatt on 50 Ohms 21 7 dBm 9 5 Vrms 600 mWa
9. tt on 150 Ohms 21 8 dBm 9 6 Vrms 310 mWatt on 300 Ohms 22 0 dBm 9 8 Vrms 160 mWatt on 600 Ohms 13 9 dBm 3 8 Vrms 300 mWatt on 50 Ohms 18 7 dBm 6 7 Vrms 300 mWatt on 150 Ohms 21 7 dBm 9 4 Vrms 300 mWatt on 300 Ohms 21 7 dBm 9 4 Vrms 150 mWatt on 600 Ohms less than 0 5 Ohm at 1 kHz 3 stereophonic 6 35 mm JACK 20 Hz 20 kHz at 0 3 dB 2 US lt 1 from 20Hz to 1 kHz lt 8 at 10 kHz lt 13 at 20 kHz 16 dB on balanced inputs 0 020 on 50 Ohms at 300 mWatt output 0 015 on 150 Ohms at 300 mWatt output 0 015 on 300 Ohms at 300 mWatt output 0 015 on 600 Ohms at 150 mWatt output 110 dB at 4 dBm input 20 Hz 20 kHz potentiometer on median position 125 dB at 20 dBm input 20 Hz 20 kHz potentiometer on median position 115 dBm 20 Hz 20 kHz potentiometer on median position 100 dBm 20 Hz 20 kHz potentiometer on maximum position 230 Vac or 120 Vac mains voltage set internally 45 to 65 Hz frequency consumption lt 10W FRB connector option 80 CEI connector option 81 left and right overload 6 dB before clipping input DC voltage greater than 100mV 10 C to 40 C 20 C to 60 C 220x170x55 mm 1600 g MCN AUDIO U4410 HEADPHONES AMPLIFIER 6 PRECAUTIONS WARNING To avoid risk of fire or electrical shock do no expose this equipment to rain or excessive humidity Service must be performed by a qualified technician MAIN VOLTAGE SETTIN
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