| Brand | Unbranded |
|---|---|
| Compatible Brand | Universal |
| Compatible Product | microphone amplifier, pre-stage |
| Type | Audio Level Indicator |
Check the listing for details. LM3915 10 LED Audio Level Indicator DIY VU Meter Preamp Power Amplifier Indicate. Condition: New. Listed at 18.46 USD. The board has a first-level amplifier (using 741 single op amp), and there are two sets of high and low inputs. 1pcs LM3915 10 LED Audio Level Indicator Assembled. Yellow: connect to the positive signal line, green: connect to the negative signal line (outer layer, shielding layer).