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Adastra SL4 Slimline 4" Ceiling Speakers (Pair)

£3999
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Adastra SL4 is a pair of slimline ceiling speakers built for full range sound without taking up much visual space. Each speaker uses a hi-flex main driver that gives you full range output with extended low frequency response, so you get useful bass alongside clear mid and treble. The result is a discreet setup that fits neatly into most rooms, whether you want background music in the kitchen or a tidier layout for a home cinema.

Installation is straightforward. The SL4 comes with three spring clips that clamp the speaker to your ceiling once the cut-out is ready, so you don't need extra brackets for this model. Wiring runs to gold-plated spring terminals, which make connecting speaker cable quick and keep a good contact over time. An efficient 2-way crossover network splits the signal, and the flared baffle helps spread sound across a wide area with a dispersion angle of 160 degrees. Each speaker runs at 8 ohms, so they suit most standard amplifiers and multi-room systems.

These speakers are supplied in pairs and sit within the wider Adastra SL range, which also includes 3", 5.25" and 6.5" versions. The larger SL5 and SL6 models add a mylar tweeter and use three 'dog-ear' mounts rather than spring clips, so you can match the driver size to the room. If you want a low-profile ceiling speaker (called an in-ceiling speaker in the US) that stays out of the way while still filling a room, the SL4 is a sensible choice for everyday listening.

Specification
Weight (each) 0.60KG
Dimensions (each) 71mm x 145mmØ
SPL @ 1W/1m 88dB
Mounting depth 70mm
Cutout 134mmØ
Power rms 20W
Frequency response 100Hz - 18kHz
Woofer 100mmØ (4") paper cone
Impedance 8 Ohm
Dispersion angle 160°
Frequently Asked

How are the SL4 speakers fixed to the ceiling?

Each SL4 uses three spring clips that clamp onto the ceiling once you've made the cut-out. There's no need for separate brackets with this model.

Do the SL4 speakers have a tweeter?

No. The SL4 uses a hi-flex main driver for full range output. The larger 5.25" and 6.5" models in the SL range add a mylar tweeter for high frequency reproduction.

Are these sold individually or as a pair?

The SL4 is supplied as a pair, so you get two speakers in the box.

What amplifier do I need for the SL4?

Each speaker runs at 8 ohms, which suits most standard stereo amplifiers and multi-room systems. Check your amplifier supports an 8 ohm load.

How wide is the sound spread?

The flared baffle gives a dispersion angle of 160 degrees, which helps spread sound across a wide area of the room.

How do the SL4 clips differ from the SL5 and SL6?

The SL4 uses three spring clips, while the SL5 and SL6 use three 'dog-ear' mounts. The SL3 uses two spring clips.

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

    The Adastra SL4 is a pair of slimline ceiling speakers built for full range sound without taking up much visual space. Each speaker uses a hi-flex main driver that gives you full range output with extended low frequency response, so you get useful bass alongside clear mid and treble. The result is a discreet setup that fits neatly into most rooms, whether you want background music in the kitchen or a tidier layout for a home cinema.

    Installation is straightforward. The SL4 comes with three spring clips that clamp the speaker to your ceiling once the cut-out is ready, so you don't need extra brackets for this model. Wiring runs to gold-plated spring terminals, which make connecting speaker cable quick and keep a good contact over time. An efficient 2-way crossover network splits the signal, and the flared baffle helps spread sound across a wide area with a dispersion angle of 160 degrees. Each speaker runs at 8 ohms, so they suit most standard amplifiers and multi-room systems.

    These speakers are supplied in pairs and sit within the wider Adastra SL range, which also includes 3", 5.25" and 6.5" versions. The larger SL5 and SL6 models add a mylar tweeter and use three 'dog-ear' mounts rather than spring clips, so you can match the driver size to the room. If you want a low-profile ceiling speaker (called an in-ceiling speaker in the US) that stays out of the way while still filling a room, the SL4 is a sensible choice for everyday listening.

    Specification
    Weight (each) 0.60KG
    Dimensions (each) 71mm x 145mmØ
    SPL @ 1W/1m 88dB
    Mounting depth 70mm
    Cutout 134mmØ
    Power rms 20W
    Frequency response 100Hz - 18kHz
    Woofer 100mmØ (4") paper cone
    Impedance 8 Ohm
    Dispersion angle 160°
    Frequently Asked

    How are the SL4 speakers fixed to the ceiling?

    Each SL4 uses three spring clips that clamp onto the ceiling once you've made the cut-out. There's no need for separate brackets with this model.

    Do the SL4 speakers have a tweeter?

    No. The SL4 uses a hi-flex main driver for full range output. The larger 5.25" and 6.5" models in the SL range add a mylar tweeter for high frequency reproduction.

    Are these sold individually or as a pair?

    The SL4 is supplied as a pair, so you get two speakers in the box.

    What amplifier do I need for the SL4?

    Each speaker runs at 8 ohms, which suits most standard stereo amplifiers and multi-room systems. Check your amplifier supports an 8 ohm load.

    How wide is the sound spread?

    The flared baffle gives a dispersion angle of 160 degrees, which helps spread sound across a wide area of the room.

    How do the SL4 clips differ from the SL5 and SL6?

    The SL4 uses three spring clips, while the SL5 and SL6 use three 'dog-ear' mounts. The SL3 uses two spring clips.

    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.