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Lampifier Infinite Direct Box: Dynamics Processor, 5-Band EQ, Speaker Simulator, XLR/Line/Piezo Preamp, Audio A/D Converter 

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The most versatile audio multi-tool ever for live sound or recording. Built with a rugged, all-metal construction! A must-have device for serious musicians and sound engineers. Saves time by quickly connecting signal sources while eliminating ground noise and giving you complete sonic control. Here are just a few applications:

  • Go direct into a PA! High-performance preamp for bass, acoustic instruments, guitar, keyboards, any instrument.
  • Use the Lampifier dynamics processor to increase articulation and detail on any mic or musical instrument.
  • Record your microphone or directly to your computer.
  • Eliminate noise and hum caused by a bad ground, a ground loop, or a computer.
  • Tap a high-power speaker signal directly from your guitar amp or speaker cabinet.
  • Use built in speaker simulator to tame harsh signals.
  • Eliminate distortion and clipping by using the peak indicator LEDs to guide your adjustments.
  • Send a signal over a long distance via the balanced D.I. output.
  • Provide phantom power for your condenser microphone.
  • Use the Lampifier dynamics processor for your microphone to decrease vocal fatigue.
  • Eliminate acoustic feedback with the 5-Band EQ and phase control switch.
  • All this in one, compact unit!
  • This is a reissue of the classic Infinite Direct Box with upgrades to it low noise circuitry.

There are so many different ways to use this device that it's impossible to list them all. Click on the applications image below or read the Model 571 User Guide (pdf document).

Features:

  • Lampifier dynamics processor equipped.
  • 100% isolation eliminates ground loops.
  • Speaker cabinet simulator.
  • 5-Band EQ.
  • Anti-feedback phase switch.
  • Extreme signal handling capability.
  • Peak LED indicators.
  • Balanced/unbalanced line inputs and outputs.
  • Piezo pickup input.
  • XLR input and output.
  • USB digital audio output.
  • Phantom powered, or battery, or DC adaptor.
  • Rugged all-metal construction.
Inputs:
  • XLR: For your mic or balanced line device. Includes +48V PHANTOM power switch to provide power to your condenser mic.
  • LINE IN: 1/4" phone jack. Accepts an extremely wide range of balanced or unbalanced inputs ranging from mic/instrument level (-50dBV), line level (-10dBV), or speaker level (100W RMS).
  • THRU: 1/4" phone jack with switchable operating mode for THRU output or MIX input.
  • PIEZO: 1/4" phone jack with ultra-high input impedance preamp for under-bridge pickup or contact microphone. Includes 0dB/15dB gain switch to match the output of your pickup.

Outputs:

  • XLR D.I.: Optimized for for a long cable run to mixer or PA. Includes high-performance transformer for full-balanced output to eliminate ground loops.
  • LINE OUT: 1/4" phone jack unbalance output with adaptive/log volume control for your local instrument amplifier or sound monitor.
  • USB DIGITAL AUDIO: An output for direct recording to your personal computer, tablet, or laptop.

Audio Processors:

  • GROUND SWITCH / LIFT SWITCH: Eliminates noise caused by a ground-loop or a computer.
  • ATTENUATION PAD: Switchable 0dB/-15dB/-30dB settings for handing extremely weak or powerful input signal.
  • INPUT LEVEL: Volume control with PEAK LED indicator for fine adjustment of signal level.
  • LAMPIFIER PROCESSOR: An adjustable dynamics processor that greatly increasing articulation and detail. Includes ACTIVE LED indicator, LAMPIFY volume control with PEAK LED indicator, and POST volume control with PEAK LED indicator.
  • 5-BAND TONE CONTROL: Includes two parametric sweepable range controls for LOW-MID and HIGH-MID. Has cascaded stages for greater adjustment range and control independence.
  • SPEAKER SIMULATOR: Has mode switch for simulating STACK guitar speaker cabinet, COMBO open-back speaker cabinet, or direct (no-speaker-cabinet). Includes 0/180 degrees PHASE switch for eliminating acoustic feedback.

XLR Input Specifications:

  • Connector: 3-pin, 1=ground, 2=+input,3=-input
  • Type: balanced, low-noise discrete transistor, transformerless
  • Impedance: 2.21K +/-1% ohms
  • Sensitivity: -55dBV to +30dBV
  • Gain Control Range: 80dB
  • Peak Amplification: 75dB
  • Phantom Power: +48V 12mA regulated and noise filtered
  • Phantom Delivery: metal-film, ultra low-noise resistors
  • Signal to Noise: 92dB Minimum
  • Frequency Response: 18Hz - 25KHz
  • Distortion: 0.02% THD

1/4" LINE IN / THRU Input Specifications:

  • Connector: 1/4" TRS phone jack, T=+input, R=-input, S=ground
  • Type: balanced or unbalanced, low-noise discrete transistor, transformerless
  • Impedance: 75K ohms
  • Sensitivity: -55dBV to +30dBV
  • Gain Control Range: 80dB
  • Peak Amplification: 75dB
  • Power Pass Thru: 100W Max.
  • Left/Right Mix: 4.75K +/-1% ohms passive
  • Signal to Noise: 96dB Minimum
  • Frequency Response: 18Hz - 25KHz
  • Distortion: 0.02% THD

1/4" PIEZO Input Specifications:

  • Connector: 1/4" TS phone jack, T=+input, S=ground
  • Type: unbalanced, low-noise discrete JFET
  • Impedance: 20M ohms
  • Sensitivity: -75dBV to +0dBV
  • Gain Control Range: 95dB
  • Peak Amplification: 90dB
  • Signal to Noise: 90dB Minimum
  • Frequency Response: 22Hz - 18KHz
  • Distortion: 0.1% THD

XLR Output Specifications:

  • Connector: 3-pin, 1=ground, 2=+input,3=-input
  • Type: balanced, low-noise transformer
  • Impedance: 600 ohms
  • Nominal Level: -10dBu
  • Range: 300 meters
  • Ground Isolation: 1000 ohms minimum
  • Accepts Phantom Power: Yes

1/4" Output Specifications:

  • Connector: 1/4" TS phone jack, T=+input, S=ground
  • Type: unbalanced
  • Impedance: 10K ohms
  • Nominal Level: -10dBV

USB Digital Audio Output Specifications:

  • Resolution: 16 bits.
  • Conversion Rate: 8kHz to 48kHz software adjustable.
  • Signal to Noise: 92dB.
  • Distortion: 0.01% THD+N.
  • Dynamic Range: 90dB.

Power Requirements: (Operates on any one or more of these.)

  • BATTERY: Alkaline 9-V. Battery Life: 100 hours continuous use.
  • PHANTOM POWER: provided by an external supply or your mixer.
  • 9V DC ADAPTOR: 9V 300mA (adaptor type as commonly used for guitar effects boxes).
  • USB POWER: 5V 500mA provided by your personal computer, tablet, or laptop.

Specification are not guaranteed and may be changed without notice.

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