Special reminder:
This board is a subwoofer preamplifier board, directly connected to the speaker will not be heard, must be connected to the post-amplifier board , to make active subwoofer to sound.

Features:
1. All components are featured with brand-new first-class products. The potentiometer is fully sealed and the input and output terminals are pure copper terminals. The wiring is very convenient.
2. The NE5532 is used for the op amp. Welded IC bases can be used to replace the op amp at any time.Allowing users to experience the feelings brought by different op amps and enhance their playability.
3, Designed with LED indicators, real-time monitoring of power conditions.
4, This board PCB design simple and beautiful, reasonable wiring, making this board has a very high signal to noise ratio, strong anti-interference ability.

Parameter:
Supply voltage: DC10-24V single power supply.
Frequency range: 22Hz-300Hz.
Audio input: mono or dual channel.
Audio output: mono.
PCB specification: 78x32mm, thickness: 1.6mm.
PCB material: Ultra-hard FR-4 fiberglass board.
Finished board net weight: 30g.
Plate center hole spacing: 70x24mm, hole diameter: 3.2mm.
Potentiometer shaft center distance: 32.5mm.

Package Included:
1pcs NE5532 Single Supply Low-Pass Filter Board Subwoofer Pre-Amplifier Preamp Board 2pcs Potentiometer cap