Preamplifier drives computer sound-card line input.
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Press Release Summary:
Model 421 High-Performance Stereo Microphone Preamp features 2 identical, differential input stages that use compound transistor pairs with circuit resistance values computer-optimized for very low output noise. Dynamic range is nearly 70 dB at full gain of 60 dB. Internal rechargeable batteries provide complete isolation from power mains, and cast-aluminum enclosure minimizes pickup of unwanted interference.
Original Press Release:
High-Performance Stereo Microphone Preamp Model 421
TDL® Technology, Inc. announces their Model 421, High-Performance Stereo Microphone Preamp. Two identical differential input stages use compound transistor pairs with circuit resistance values computer optimized for very low output noise. This preamp was especially designed to drive a computer sound card's line-input so the output noise needs to be very low compared to the line-in maximum signal level. However, it is useful in any application where very low noise gain is needed to condition a low-impedance sensor's output. The 421 is literally two model 401's on the same circuit board with increased battery capacity. The internal rechargeable batteries provide complete isolation from the power mains and the cast aluminum enclosure minimizes the pickup of unwanted interference.
Single quantity price is $306. USD plus shipping. Availability is stock to four weeks. A full data sheet and User Guide in PDF format can be downloaded from our web site at zianet.com/tdl.
Contact Ron Tipton for additional information or questions.
