TW Electronic Components LP444s User Manual Download Page 2

LEFT SIDE PANEL

 Balanced channel inputs – four electronically balanced circuits (transformer balanced is optional) 

in phase with one another. XLR connectors should be wired as pin1 ground, pin2 +phase signal and 
pin3 –phase signal.

 Microphone powering selector switches – The input sensitivity in position D is DYN 200 = 0.2 mV 

and no power. Selected 48, 12, T, mic powering, 10 dB of attenuation is automatically introduced, 
considering the sensitivity of condenser mics.

 Phase reverse switches – Intended to compensate for a phase error due to wiring or mic 

placement.

 Phantom on / off switch – The current consumption of the phantom power supply is 13 mA. 

Phantom power supply may be switched off (only if using dynamic, wireless of T powering mics) to 
increase the lifelength of the internal batteries between two chargings.

 Attenuation switches – The gain of the mic preamplifiers may be decreased by –10 dB in position 

D. In positions 48, 12 and T the attenuation is –13 dB.

 Mic / line level switches – Selects mic or line to add –60 dB attenuation before the mic 

preamplifiers.

 Optional NP1 Battery Holder – The switched mixer supply is derived either from the internal AA 

batteries or from NP1 battery depending on the position of the panel side switch.

Summary of Contents for LP444s

Page 1: ...ELECTRONIC COMPONENTS LP444s USER MANUAL TW LP444s is a compact portable 4 in 2 out and switchable 4 in 4 out unit designed for four track recorder or camera...

Page 2: ...ase error due to wiring or mic placement Phantom on off switch The current consumption of the phantom power supply is 13 mA Phantom power supply may be switched off only if using dynamic wireless of T...

Page 3: ...epending on meter selector switch when the limiters are selected and gain reduction is occurring Threshold is internally set to 6 dBu at the balanced output To adjust the limiter threshold for a value...

Page 4: ...of both Left and Right legs and has 6 dB of gain in hand with the nominal 0 dB gain position marked PWR LED A red LED lights to indicate power is on and blinking when the battery is too low Power swi...

Page 5: ...The line level at XLR and Hirose connectors can be attenuated by 50 dB to provide the microphone level 3 5 mm stereo monitor input jack Video assist A mono output formed by summing the Left Right Cha...

Page 6: ...on the Reference Generator Adjust TRIMRG on Ref Gen amplifier board to obtain 0 dB at the Left meter Repeat it for Right output and Right meter that turn up 4 4 switch and put meter selector switch t...

Page 7: ...DRIVER XLR R OUT XLR L OUT RTN 1 2 RTN 1 2 EE MONITOR SELECTOR MS MATRIX P F L L PHONES R PHONES VOLUME P H O N E S 6 3 3 5 3 2 4 1 DC BATT EXT 10 Vdc VOLTAGE STABILIZER BATTERY PACK R 3 CHANNEL 4 CH...

Page 8: ...r 80 100 Hz 14 dB octave Crosstalk isolation channel to channel 65 dB Outputs Line transformer balanced XLR Line level on 600 0 dB on the modulometer 6 dBu 4 on the 1 7 scaling 0 dBu 0 Vu on the VU sc...

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