LOT OF 7 UNITS - RDL STM-3 High Gain Microphone Preamp (+45 to +75 dB Gain)

LOT OF 7 UNITS - RDL STM-3 High Gain Microphone Preamps (+45 to +75 dB Gain)

• These seven units are in great condition and perfect working order.
• The units shown in the photos are the actual units you will receive.
• Your order ships the next business day, fully-insured, to the continental United States.
• Please visit my store if you need RDL power distribution units and associated 24V AC power supplies.

Additional information from the manufacturer:

The STM-3 is a high-quality microphone preamplifier designed for use in commercial sound, broadcast, and recording where higher than normal gain is required. The STM-3 is very flexible, with gain adjustment from 45 to 75 dB, two balanced or unbalanced outputs, and available phantom supply input. Its low-distortion and low-noise performance make it the best choice, even when larger preamps could be used. The STM-3 power supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. Each output drives high or low impedance loads.

Specs:

Input:500 Ω balanced; 5 kΩ unbalanced

Phantom:24 Vdc; IEC 61938: 2013, Filtered

Output (2):+4 dBu 150 Ω balanced; -10 dBV unbalanced

Frequency Response:50 Hz to 30 kHz (± 1.5 dB)

Gain:Adjustable 45 to 75 dBTHD+N:< 0.05% (50 dB gain)CMRR:> 50 dB (50 Hz to 20 kHz)

Residual Noise:< -70 dB (below +4 dBu, 150 Ω source)

Headroom:> 20 dB (24 Vdc supply); 14 dB (12 Vdc supply)

Phantom Power Input:24 Vdc @ 10 mA maximum

Dimensions:Height: 0.7 in. (1.7 cm); Width: 3 in. (7.6 cm); Depth 1.6 in. (3.9 cm)

Ambient Operating Environment:0° C to 55° C

Power Requirement:GROUND-REFERENCED, 24 Vdc @ 25 mA

Package Type:Cardboard Box

WEEE weight:0.145 lbs.

Shipping Weight:0.195 lbs.

Further information is available at the manufacturer's website:

• Open Google and search for "Radio Design Labs"
• In the RDL website, search for "STM-3"