Pure subwoofer front plate low pass filter high level input DIY pre tone balanced input / output board

Low pass filter front plate for bass artillery(mono channel output)

Circuit board size:168*50MM

Reverse side height of the circuit:10MM

Front height of the circuit:35MM(installation of parallel surfaces)10MM)

Working voltage:DC+/-12V---+/-15VDirect and negative direct and negative12Volt-DC positive and negative15Volt)

Low pass frequency:5-150Hz

Input mode: high voltage input of external connection block, input of lotus block circuit, balanced transmission.

Enter (only one of its input modes)

Low-pass output mode: line output, balanced output.

Note: no electronic base of the relatives, please do not take.

VR2Total volume adjustment.

VR1Frequency divider adjustment, upper limit frequency adjustable button35-150HzIt is used to match the lower frequency of the main box.

SW SPOTPhase regulation, positive phase0Degree and inverse180The degree switch is convenient to match with the phase of the main box, otherwise the bass will be weakened.

INIt is a pair of lotus receptacles for low level input, suitable for pre signal input, and other heavy bass in the sound channel.

Entry (with independence)SUBAs long as the bass output is inserted into one of themLorR)。

OUTIt is a pair of lotus receptacles for low level output. Its function is to put the sound source signal on.100HzThe above signals are separated,

The output port can be connected to other amplifier inputs as the main box.100HzThe above sound, and the boardJ2The port outputs a bass signal.

SP1(SPEAKER LEVEL IN)High level inputred+black-The two pairs of terminals are about High level input (main power amplifier).

LamaThe output of PA is high level signal, which can facilitate the output of a power amplifier without independent bass signal, and output it to this port.

Easy to output bass

Please read the instructions carefully and mark the connection according to the above illustration.

Note: + output refers to the signal in phase output, the output is the signal inverting output, (the output signal is only connected to it.

One phase to the power amplifier panel, the phase can be adjusted by PHASE.