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LOW PASS FILTER FOR SUB WOOFERS.

Low Pass Filter for Sub Woofers          A high grade circuit for producing a single low frequency output from Stereo Line Level inputs.
     With modification to the filter block component values, it can also substitute for a Low Pass Passive filter / crossover in an existing system. Orders 1 through 4 are available as is output gain. Strictly DIY on this, you do your own thing.
   #   Provides high quality line level LF output for sub woofer.
   #   Sums L + R Signals from Line or Speaker Outputs.
   #   Buffered inputs with option of 180 degree phase reverse on one input.
   #   Single frequency operation, (adjustable by component selection), with gain control.
   #   Option by component selection of 1st to 4th Order filter.
   #   Timing delay circuit, seconds to minutes  for system settling. No pops
        and bangs at switch-on using a high quality signal relay.
   #   Buffered output.
   #   Options on signal chip set, Standard (TL072 ) upgrade1 (TL052).
   #   Supplied pre-built, or with all parts, documentation and hardware. Excludes power supply.

    NOTES
(a)   Supplied complete with pre drilled black ABS case, PCB mounting hardware, phono sockets, internal wire and power              supply connector, but NOT power supply.

(b)   Available with  upper 3dB roll off points @ 80, 100 or 120 Hz depending upon components.
Please specify when you order. If you don't specify you get 100Hz, 4th Order, 24dB/ Octave.

(c)   May be used to assist HF clutter removal from Band-pass sub bass units  or used with full frequency range enclosures to restrict upper frequency activity. 

(d)   This board does NOT drive a Sub on it's own. You still need a Power Amplifier.

(e)   Requires dual rail power supply, unregulated (20 - 24)Volts per leg, DC input @ 50mA.
NOT Supplied. If you have a dual +/- 15 volt supply available you can   bypass the front-end voltage regulators. Higher input voltages can be accommodated with zener diode clamping.

Order Code Description Options Price GBP
SWLP1 Low Pass Sub Woofer Filter. Pre-Built. Excludes Pwr Supply Frequency, Order 73.56
SWLP2 PCB Board, Circuit, Components. Excludes Power Supply Frequency, Order 60.28
SWLP3 PCB and Documentation only ******** 22.48
  UPGRADE OPTIONS    
RSET1 Extra set of 80 Hz filter parts ******** 2.55
RSET2 Extra set of 100 Hz filter parts. ******** 2.55
RSET3 Extra set of 120 Hz filter parts ******** 2.55
CSET1 Chip-Set Upgrade for SWLP1 or SWLP2 ******** 5.11

All Prices include VAT @ 17.5%.   See carriage charges for further information.

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