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QTX Passive Subwoofer Filter, 120Hz, 4 Ohms, 400W

£1199
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
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Description

These QTX passive subwoofer filters are made for use in Hi-Fi and PA loudspeaker systems. They handle the crossover work inside the enclosure, sending low frequencies to the subwoofer (sub) and keeping higher content away from it. Because they are passive, they run from the amplifier signal and need no separate power supply, which keeps wiring straightforward inside a cabinet build.

The crossover frequency is set at 120Hz, with a damping factor of 12dB per octave. That slope gives a reasonably clean roll-off, so the sub covers the low end while the rest of your speaker system takes care of the mids and highs. The filter is rated at 4 ohms and handles up to 400W, which suits it to full-size PA and Hi-Fi builds rather than small bookshelf units.

Connections are made by solder terminals, so you can wire the filter directly into your loudspeaker circuit for a secure, permanent joint. This is a component part rather than a finished product, aimed at anyone building or repairing a subwoofer enclosure. If you know your driver impedance and power handling, matching this filter is a simple job, and it gives you a fixed crossover point without having to design the network yourself.

Specification
Power rms 160W
Power peak 400W
Damping 12dB/Oct.
Frequency 120Hz
Impedance 4 Ohm
Frequently Asked

Is this an active or passive filter?

It is a passive filter, so it runs from the amplifier signal inside the speaker circuit and needs no separate power supply.

What crossover frequency does it use?

The crossover frequency is fixed at 120Hz, with a slope of 12dB per octave.

What impedance and power rating does it support?

It is rated at 4 ohms and handles up to 400W, suiting full-size Hi-Fi and PA builds.

How are the connections made?

Connections are by solder terminals, so the filter is wired directly into your loudspeaker circuit.

Where is this filter used?

It is designed for subwoofer sections in Hi-Fi and PA loudspeaker systems, typically fitted inside the enclosure.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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    Description

    These QTX passive subwoofer filters are made for use in Hi-Fi and PA loudspeaker systems. They handle the crossover work inside the enclosure, sending low frequencies to the subwoofer (sub) and keeping higher content away from it. Because they are passive, they run from the amplifier signal and need no separate power supply, which keeps wiring straightforward inside a cabinet build.

    The crossover frequency is set at 120Hz, with a damping factor of 12dB per octave. That slope gives a reasonably clean roll-off, so the sub covers the low end while the rest of your speaker system takes care of the mids and highs. The filter is rated at 4 ohms and handles up to 400W, which suits it to full-size PA and Hi-Fi builds rather than small bookshelf units.

    Connections are made by solder terminals, so you can wire the filter directly into your loudspeaker circuit for a secure, permanent joint. This is a component part rather than a finished product, aimed at anyone building or repairing a subwoofer enclosure. If you know your driver impedance and power handling, matching this filter is a simple job, and it gives you a fixed crossover point without having to design the network yourself.

    Specification
    Power rms 160W
    Power peak 400W
    Damping 12dB/Oct.
    Frequency 120Hz
    Impedance 4 Ohm
    Frequently Asked

    Is this an active or passive filter?

    It is a passive filter, so it runs from the amplifier signal inside the speaker circuit and needs no separate power supply.

    What crossover frequency does it use?

    The crossover frequency is fixed at 120Hz, with a slope of 12dB per octave.

    What impedance and power rating does it support?

    It is rated at 4 ohms and handles up to 400W, suiting full-size Hi-Fi and PA builds.

    How are the connections made?

    Connections are by solder terminals, so the filter is wired directly into your loudspeaker circuit.

    Where is this filter used?

    It is designed for subwoofer sections in Hi-Fi and PA loudspeaker systems, typically fitted inside the enclosure.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.