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Adastra B30V-B 4" 100V Line Background Speakers, Black Pair

£8999
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Adastra B30V-B is a pair of 4 inch 100V line speakers finished in black, supplied with mounting brackets so you can fit them horizontally or vertically to suit the space. They use a 3-way design with bass reflex, pairing a 100mm (4") woofer with a 50mm (2") mid driver and a 13mm (0.5") dome tweeter to cover a frequency response of 120Hz to 20kHz.

A rotary switch on each cabinet lets you choose between four 100V line tappings (30W, 20W, 10W and 5W) or run the speakers at 8 Ohms. On a 100V line system the matching impedance settings are 333, 500, 1k and 2k Ohms, which makes it straightforward to balance loudness across several speakers on the same amplifier run. Maximum power handling is 60W and sensitivity is rated at 87dB, so the pair suits background music, surround and monitoring jobs in shops, offices and similar settings.

Each cabinet measures 136 x 240 x 155mm and the set weighs 3.26kg, so the speakers stay compact on a wall or ceiling bracket. If you prefer a lighter finish, the same model is also available in white. Between the two 100V line and 8 Ohm wiring options, the B30V-B fits both distributed audio installs and standard low-impedance amplifier setups without needing extra hardware.

Specification
Colour Black
Woofer 100mm (4") PP cone
Mid driver 50mmØ (2") PP cone
Tweeter 13mm (0.5") dome
Power handling : max. 60W
Impedance 8 Ohm
Impedance : 100V 333, 500, 1k, 2k Ohm
Tappings 30W, 20W, 10W, 5W + 8 Ohm
Sensitivity 87dB
Frequency response 120Hz-20kHz
Dimensions (each) 136mm x 240mm x 155mm
Weight (per set) 3.26KG
Frequently Asked

Are these speakers sold individually or as a pair?

They are supplied as a pair, complete with mounting brackets for horizontal or vertical fitting.

Can I run them at 8 Ohms instead of on a 100V line?

Yes. Each speaker has a rotary switch that selects one of four 100V line tappings or 8 Ohm operation.

What power tappings are available on the 100V line?

The tappings are 30W, 20W, 10W and 5W, plus the 8 Ohm option.

What is the frequency response?

The B30V-B covers 120Hz to 20kHz using a 3-way driver arrangement with bass reflex.

Do they come in any other colour?

Yes, the same model is also available in white.

What are the dimensions and weight?

Each cabinet measures 136 x 240 x 155mm and the pair weighs 3.26kg.

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 B30V-B is a pair of 4 inch 100V line speakers finished in black, supplied with mounting brackets so you can fit them horizontally or vertically to suit the space. They use a 3-way design with bass reflex, pairing a 100mm (4") woofer with a 50mm (2") mid driver and a 13mm (0.5") dome tweeter to cover a frequency response of 120Hz to 20kHz.

    A rotary switch on each cabinet lets you choose between four 100V line tappings (30W, 20W, 10W and 5W) or run the speakers at 8 Ohms. On a 100V line system the matching impedance settings are 333, 500, 1k and 2k Ohms, which makes it straightforward to balance loudness across several speakers on the same amplifier run. Maximum power handling is 60W and sensitivity is rated at 87dB, so the pair suits background music, surround and monitoring jobs in shops, offices and similar settings.

    Each cabinet measures 136 x 240 x 155mm and the set weighs 3.26kg, so the speakers stay compact on a wall or ceiling bracket. If you prefer a lighter finish, the same model is also available in white. Between the two 100V line and 8 Ohm wiring options, the B30V-B fits both distributed audio installs and standard low-impedance amplifier setups without needing extra hardware.

    Specification
    Colour Black
    Woofer 100mm (4") PP cone
    Mid driver 50mmØ (2") PP cone
    Tweeter 13mm (0.5") dome
    Power handling : max. 60W
    Impedance 8 Ohm
    Impedance : 100V 333, 500, 1k, 2k Ohm
    Tappings 30W, 20W, 10W, 5W + 8 Ohm
    Sensitivity 87dB
    Frequency response 120Hz-20kHz
    Dimensions (each) 136mm x 240mm x 155mm
    Weight (per set) 3.26KG
    Frequently Asked

    Are these speakers sold individually or as a pair?

    They are supplied as a pair, complete with mounting brackets for horizontal or vertical fitting.

    Can I run them at 8 Ohms instead of on a 100V line?

    Yes. Each speaker has a rotary switch that selects one of four 100V line tappings or 8 Ohm operation.

    What power tappings are available on the 100V line?

    The tappings are 30W, 20W, 10W and 5W, plus the 8 Ohm option.

    What is the frequency response?

    The B30V-B covers 120Hz to 20kHz using a 3-way driver arrangement with bass reflex.

    Do they come in any other colour?

    Yes, the same model is also available in white.

    What are the dimensions and weight?

    Each cabinet measures 136 x 240 x 155mm and the pair weighs 3.26kg.

    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.