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Adastra UA90 Compact 5-Channel 100V Mixer-Amplifier

£19999
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Description

The Adastra UA90 is a compact 100V mixer-amplifier built around a 5-input mixer in a half-width 1U housing. It handles three switchable mic/line inputs, an RCA line input and a 3.5mm Aux input, each with its own front panel volume control, plus a Master output control. This layout suits small to medium PA installations where you need a few sources brought together and sent to one output.

Mono output runs to either 100V line or an 8 ohm speaker load, connected through a removable screw terminal (Euroblock) connector on the rear panel. Construction is Class D with a transformer output stage, and switchable +20V phantom power is available on channel 1 via XLR or the rear terminals. There are 24V fire alarm mute contacts for integration with building alarm systems, along with two RCA line outputs for feeding another amplifier or recorder.

The UA90 ships with rack-mounting hardware that can be set up two ways: to fit a single unit against a wall or under a worktop, or to mount two units side by side in a standard rack. Rated figures include THD below 0.4% at 1kHz, a frequency response of 100Hz to 18kHz, and signal-to-noise of 80dB on line and 75dB on mic inputs. It gives you a straightforward, flexible base for background music and paging over a 100V line.

Specification
Output power : rms 90W
Weight 2.99KG
Dimensions 300mm x 210mm x 44mm
Power supply 170-264Vac, 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

Can the UA90 drive both 100V line and 8 ohm speakers?

Yes. The mono output connects to either a 100V line system or an 8 ohm low impedance speaker load through the rear Euroblock terminal.

How many inputs does it have?

Five: three switchable mic/line inputs, one RCA line input and one 3.5mm Aux input, each with its own volume control.

Does it support phantom power?

Channel 1 has switchable +20V phantom power, available via XLR or the rear terminals, for condenser microphones.

Can I rack-mount two units together?

Yes. The supplied hardware lets you mount two half-width units side by side in a standard rack, or fix a single unit to a wall or under a worktop.

Is there a fire alarm mute feature?

Yes. The UA90 has 24V relay mute contacts so audio can be muted automatically when triggered by a building fire alarm system.

What is the amplifier construction?

It uses a Class D design with a transformer output stage for 100V line operation.

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 UA90 is a compact 100V mixer-amplifier built around a 5-input mixer in a half-width 1U housing. It handles three switchable mic/line inputs, an RCA line input and a 3.5mm Aux input, each with its own front panel volume control, plus a Master output control. This layout suits small to medium PA installations where you need a few sources brought together and sent to one output.

    Mono output runs to either 100V line or an 8 ohm speaker load, connected through a removable screw terminal (Euroblock) connector on the rear panel. Construction is Class D with a transformer output stage, and switchable +20V phantom power is available on channel 1 via XLR or the rear terminals. There are 24V fire alarm mute contacts for integration with building alarm systems, along with two RCA line outputs for feeding another amplifier or recorder.

    The UA90 ships with rack-mounting hardware that can be set up two ways: to fit a single unit against a wall or under a worktop, or to mount two units side by side in a standard rack. Rated figures include THD below 0.4% at 1kHz, a frequency response of 100Hz to 18kHz, and signal-to-noise of 80dB on line and 75dB on mic inputs. It gives you a straightforward, flexible base for background music and paging over a 100V line.

    Specification
    Output power : rms 90W
    Weight 2.99KG
    Dimensions 300mm x 210mm x 44mm
    Power supply 170-264Vac, 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

    Can the UA90 drive both 100V line and 8 ohm speakers?

    Yes. The mono output connects to either a 100V line system or an 8 ohm low impedance speaker load through the rear Euroblock terminal.

    How many inputs does it have?

    Five: three switchable mic/line inputs, one RCA line input and one 3.5mm Aux input, each with its own volume control.

    Does it support phantom power?

    Channel 1 has switchable +20V phantom power, available via XLR or the rear terminals, for condenser microphones.

    Can I rack-mount two units together?

    Yes. The supplied hardware lets you mount two half-width units side by side in a standard rack, or fix a single unit to a wall or under a worktop.

    Is there a fire alarm mute feature?

    Yes. The UA90 has 24V relay mute contacts so audio can be muted automatically when triggered by a building fire alarm system.

    What is the amplifier construction?

    It uses a Class D design with a transformer output stage for 100V line operation.

    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.