Model ILP-1 User Guide
Output Clipping Level LOAD 150 � 800 � GAIN SWITCH 0 0.0 dBV �13.0 dBV +10 �7.0 dBV �21.0 dBV
Electromagnetic Hum Sensitivity �146 dBV equivalent in 1 millioersted field Electrostatic Hum Pickup �97 dBV typical, measured in 12 kV field Polarity Positive voltage on pin 3 relative to pin 1 of the input connector produces positive voltage on pin 2 relative to pin 3 of the output connector Power Requirement Phantom power: 11 to 52 Vdc at pins 2 and 3 relative to pin 1 Dimensions See Figure 1.
138 mm (5 7/16 IN.)
GENERAL The ILP-1 is a high-clipping level, low-noise preamplifier designed exclusively for use with Shure Models SM90A, SM91A, SM98A, SM102B and SM102W, or for use as a replacement preamplifier for older Models SM90, SM91, and SM98. The ILP-1 connects to balanced microphone inputs providing 11 to 52 Vdc phantom power. Two switches on the ILP-1 allow you to set low-frequency response (flat or rolloff at 12 dB/octave) and gain (0 or +10 dB). The low cut switch minimizes ambient low-frequency noise from sources such as heating or air conditioner fans. The supplied mounting clamps hold the preamplifier in place for permanent installations. Use either one or two clamps depending on location and application. SPECIFICATIONS Frequency Response
Switch Setting Flat Rolloff Gain (dB) 30 Hz to 20 kHz (6 dB/octave rolloff below 30 Hz) 80 Hz to 20 kHz (12 dB/octave rolloff below 80 Hz) Gain (dB) �6.0 (±0.5 dB) +4.0 (+1.0, �1.5 dB)
20 mm (13/16 IN.)
DIMENSIONS FIGURE 1 Weight 170 grams (6.0 ounces) Connectors 3-pin male (TB3M) Input: mini Output: 3-pin (male) XLR-type Switches Two recessed slide switches (low frequency rolloff and 0/+10 gain) Case Steel, matte black enamel finished Environmental Conditions Operating Temperature: �19 to 57° C (�20 to 13° F) Storage Temperature: �29 to 74° C (�20 to 168° F) Relative Humidity: 0 to 95%
Gain (at 1 kHz, no load)
Switch Setting 0 +10
Output Impedance Rated at 150 � (90 � actual) Output Noise (V , grounded, no load)
in
