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Adastra UA240 Compact 5-Channel 100V Mixer-Amplifier

£26999
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Adastra UA240 is a compact 100V mixer-amplifier that packs a 5-input mixer into a half-width 1U housing. It gives you three switchable mic/line inputs, an RCA line input and a 3.5mm aux input, each with its own front panel volume control alongside a master output control. That makes it a practical choice for small to medium PA installations where you need to blend a few sources without taking up much rack space.

Output runs to either a 100V line or an 8 ohm speaker load via a removable screw terminal (Euroblock) connector on the rear panel, so it suits both distributed 100V systems and standard low impedance setups. The amplifier uses a Class D design with a transformer output, and there's a global 2-band EQ to shape the overall sound. Channel 1 offers switchable +20V phantom power for condenser microphones, available on the XLR or the rear terminals. Twenty-four volt fire alarm mute contacts let the amp drop its output when triggered by an alarm system.

The UA240 comes with rack-mounting hardware that can be set up two ways: mount two units side by side in a standard rack, or fix a single unit flat against a wall or under a worktop. Rated performance includes THD below 0.4% at 1kHz, a signal to noise ratio of 80dB on line inputs, and a frequency response of 100Hz to 18kHz. Input sensitivity sits at -10dB for line and -45dB for mic, with a 1k ohm input impedance on the mic/line channels. It's a straightforward, flexible amp for background music, paging and general announcements.

Specification
Output power : rms 240W
Weight 3.17KG
Dimensions 350mm x 210mm x 44mm
Power supply 230Vac, 50Hz (IEC)
Amplifier : construction Class D + transformer output
Inputs Mic/line (combo), 2 x mic/line (6.3mm), line (RCA), aux (3.5mm)
Phantom power +20V CH1 (XLR or rear terminals)
Line output 2 x RCA (mono)
Speaker output Euroblock terminals: 100V / 8 Ohm or 2 Ohm / Com
Mute 24V relay contacts
THD <0.4% @ 1kHz
Input impedance 1k Ohm (mic/line)
Input sensitivity -10dB (line), -45dB (mic)
SNR 80dB (line), 75dB (mic)
Frequency response 100Hz - 18kHz
Downloads

Product Manual

Frequently Asked

Does the UA240 work with 100V line speakers?

Yes. The output connects to either a 100V line or an 8 ohm low impedance speaker load through the removable screw terminal connector on the rear panel.

How many inputs does it have?

Five in total: three switchable mic/line inputs, one RCA line input and one 3.5mm aux input, each with its own front panel volume control.

Can I connect a condenser microphone?

Yes. Channel 1 provides switchable +20V phantom power, available on the XLR input or the rear terminals, which powers a condenser microphone.

Does it support fire alarm muting?

It does. The amp includes 24V relay mute contacts, so its output can be muted automatically when triggered by a fire alarm system.

How do I mount the UA240?

It ships with rack-mounting hardware. You can rack two units side by side, or mount a single unit flat against a wall or under a worktop.

Is there tone control on board?

Yes. A global 2-band EQ lets you adjust the overall sound across all channels on the 120W and 240W models.

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 UA240 is a compact 100V mixer-amplifier that packs a 5-input mixer into a half-width 1U housing. It gives you three switchable mic/line inputs, an RCA line input and a 3.5mm aux input, each with its own front panel volume control alongside a master output control. That makes it a practical choice for small to medium PA installations where you need to blend a few sources without taking up much rack space.

    Output runs to either a 100V line or an 8 ohm speaker load via a removable screw terminal (Euroblock) connector on the rear panel, so it suits both distributed 100V systems and standard low impedance setups. The amplifier uses a Class D design with a transformer output, and there's a global 2-band EQ to shape the overall sound. Channel 1 offers switchable +20V phantom power for condenser microphones, available on the XLR or the rear terminals. Twenty-four volt fire alarm mute contacts let the amp drop its output when triggered by an alarm system.

    The UA240 comes with rack-mounting hardware that can be set up two ways: mount two units side by side in a standard rack, or fix a single unit flat against a wall or under a worktop. Rated performance includes THD below 0.4% at 1kHz, a signal to noise ratio of 80dB on line inputs, and a frequency response of 100Hz to 18kHz. Input sensitivity sits at -10dB for line and -45dB for mic, with a 1k ohm input impedance on the mic/line channels. It's a straightforward, flexible amp for background music, paging and general announcements.

    Specification
    Output power : rms 240W
    Weight 3.17KG
    Dimensions 350mm x 210mm x 44mm
    Power supply 230Vac, 50Hz (IEC)
    Amplifier : construction Class D + transformer output
    Inputs Mic/line (combo), 2 x mic/line (6.3mm), line (RCA), aux (3.5mm)
    Phantom power +20V CH1 (XLR or rear terminals)
    Line output 2 x RCA (mono)
    Speaker output Euroblock terminals: 100V / 8 Ohm or 2 Ohm / Com
    Mute 24V relay contacts
    THD <0.4% @ 1kHz
    Input impedance 1k Ohm (mic/line)
    Input sensitivity -10dB (line), -45dB (mic)
    SNR 80dB (line), 75dB (mic)
    Frequency response 100Hz - 18kHz
    Downloads

    Product Manual

    Frequently Asked

    Does the UA240 work with 100V line speakers?

    Yes. The output connects to either a 100V line or an 8 ohm low impedance speaker load through the removable screw terminal connector on the rear panel.

    How many inputs does it have?

    Five in total: three switchable mic/line inputs, one RCA line input and one 3.5mm aux input, each with its own front panel volume control.

    Can I connect a condenser microphone?

    Yes. Channel 1 provides switchable +20V phantom power, available on the XLR input or the rear terminals, which powers a condenser microphone.

    Does it support fire alarm muting?

    It does. The amp includes 24V relay mute contacts, so its output can be muted automatically when triggered by a fire alarm system.

    How do I mount the UA240?

    It ships with rack-mounting hardware. You can rack two units side by side, or mount a single unit flat against a wall or under a worktop.

    Is there tone control on board?

    Yes. A global 2-band EQ lets you adjust the overall sound across all channels on the 120W and 240W models.

    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.