3pcs DC 9-24V AC 8-16V NE5532 Audio OP AMP Microphone Preamps Pre-Amplifier Module Board
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Received in good order in about 2 weeks. Comes with shielded input and output cables. I have connected up a test circuit and it works well. Was noisy when i used a cheap 12V AC wall-wart to power it, was quiet when I switched to a 12V DC regulated supply. I have added a 10K log pot to the input to control the volume. ( I cut the input cable in half and soldered the pot into the middle of the cable.)
Thank you
OK
Very well designed small pre-amp micro modules. AC power is very convenient for storing them in transfo-powered devices. Not tried on a phono input as they do not include RIAA correction. The NE5532 is mounted on a stand, which makes it very easy to compare with other OP amplifiers. Good thinking!
odlično deluje kot sem pričakoval
A quiet unit, which does work well
reliable
delivery good, has onboard rectifier