Behringer 904A Voltage Controlled Low Pass Filter Handleiding

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Quick Start Guide

Controls

(1) FIXED CONTROL VOLTAGE – Also referred to as “cuto

frequency”, this knob manually determines the frequency

above which frequencies are attenuated. The resulting

frequency will depend on this knob’s setting as well as

voltage received from the control inputs.

(2) FREQUENCY RANGE – Select one of 3 frequency bands

in which the xed control voltage operates. Position 1 is

1 Hz to 5 kHz, position 2 is 4 Hz to 20 kHz, and position 3 is

16 Hz to 80 kHz.

(3) REGENERATION – This knob varies the amount of

internal feedback, creating a resonant peak at the cuto

frequency. At higher settings this becomes self-oscillation.

(4) SIGNAL INPUT – Connect the incoming signal via 3.5 mm

TS cable.

(5) SIGNAL OUTPUT – Send the processed signal to another

module via 3.5 mm TS cable.

(6) CONTROL INPUTS – Connect control voltage signals from

other modules to aect the cuto frequency. The sum of

the voltage received doubles the frequency cuto point

for each 1 V increase.

(1)

(3)

(4) (5)

(6)

(2)

Power Connection

The 904A comes with the required power cable for connecting

to a standard Eurorack power supply system. Follow these

steps to connect power to the module. It is easier to make these

connections before the module has been mounted into a rack case.

1. Turn the power supply or rack case power o and

disconnect the power cable.

2. Insert the 16-pin connector on the power cable into the

socket on the power supply or rack case. The connector has

a tab that will align with the gap in the socket, so it cannot

be inserted incorrectly. If the power supply does not have

a keyed socket, be sure to orient pin 1 (-12 V) with the red

stripe on the cable.

3. Insert the 10-pin connector into the socket on the back of

the module. The connector has a tab that will align with the

socket for correct orientation.

4. After both ends of the power cable have been securely

attached, you may mount the module in a case and turn on

the power supply.

Installation

The necessary screws are included with the module for mounting

in a Eurorack case. Connect the power cable before mounting.

Depending on the rack case, there may be a series of xed holes

spaced 2 HP apart along the length of the case, or a track that

allows individual threaded plates to slide along the length

of the case. The free-moving threaded plates allow precise

positioning of the module, but each plate should be positioned in

the approximate relation to the mounting holes in your module

before attaching the screws.

Hold the module against the Eurorack rails so that each of the

mounting holes are aligned with a threaded rail or threaded

plate. Attach the screws part way to start, which will allow

small adjustments to the positioning while you get them all

aligned. After the nal position has been established, tighten the

screws down.

904A VOLTAGE CONTROLLED

LOW PASS FILTER

Legendary Analog Low Pass VCF

Module for Eurorack

V 1.0

Product specificaties