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Adastra US60 Compact 100V Slave Amplifier

£15999
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Adastra US60 is a 100V slave amplifier built into a half-width 1U housing, made for small to medium PA installations where you need to add power without rewiring an existing setup. Alongside RCA line input and output, it carries a 100V input on removable screw terminals, so you can connect it in parallel with existing 100V speakers and extend the system straight from the speaker cable.

Mono output runs to either a 100V line or an 8 Ohm speaker load, connected through a separate removable screw terminal (Euroblock) connector on the rear panel. The amplifier uses a Class D design with a transformer output, and 24V relay contacts are included for fire alarm muting. Frequency response covers 100Hz to 18kHz, with THD below 0.4% at 1kHz and a signal-to-noise ratio of 80dB.

The US60 ships with rack-mounting hardware that can hold a single unit against a wall or under a worktop, and the same kit lets you rack-mount two units side by side in a standard 1U space. Input sensitivity sits at -10dB on the line input, with a 1k Ohm input impedance. It runs from a 170-264Vac, 50Hz IEC mains supply. If you already have a 100V speaker line in place, this is a straightforward way to give it more headroom or add zones.

Specification
Output power : rms 60W
Dimensions 269mm x 210mm x 44mm
Weight 2.30KG
Power supply 170-264Vac, 50Hz (IEC)
Amplifier : construction Class D + transformer output
Inputs Line (RCA), 100V (Euroblock +/-)
Line output 2 x RCA (mono)
Speaker output Euroblock terminals: 100V / 8 Ohm / Com
Mute 24V relay contacts
THD <0.4% @ 1kHz
Input impedance 1k Ohm
Input sensitivity -10dB (line)
SNR 80dB
Frequency response 100Hz - 18kHz
Downloads

Product Manual

Frequently Asked

Can the US60 extend an existing 100V speaker system?

Yes. The 100V input on removable screw terminals lets you connect it in parallel with existing 100V speakers, so you can extend the system directly from the speaker cable.

What speaker loads does it support?

Mono output runs to either a 100V line or an 8 Ohm speaker load, connected via a separate Euroblock terminal on the rear panel.

Does it have fire alarm muting?

Yes. It has 24V relay contacts for fire alarm mute, so the amplifier can be silenced when the alarm is triggered.

Can I rack-mount two units together?

Yes. The supplied hardware can hold two US60 units side by side in a 1U rack space, or a single unit against a wall or under a worktop.

What inputs are provided?

There is an RCA line input, an RCA line output, and a 100V input on removable screw terminals for parallel connection.

What power supply does it need?

It runs from a 170-264Vac, 50Hz mains supply via an IEC connector.

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 US60 is a 100V slave amplifier built into a half-width 1U housing, made for small to medium PA installations where you need to add power without rewiring an existing setup. Alongside RCA line input and output, it carries a 100V input on removable screw terminals, so you can connect it in parallel with existing 100V speakers and extend the system straight from the speaker cable.

    Mono output runs to either a 100V line or an 8 Ohm speaker load, connected through a separate removable screw terminal (Euroblock) connector on the rear panel. The amplifier uses a Class D design with a transformer output, and 24V relay contacts are included for fire alarm muting. Frequency response covers 100Hz to 18kHz, with THD below 0.4% at 1kHz and a signal-to-noise ratio of 80dB.

    The US60 ships with rack-mounting hardware that can hold a single unit against a wall or under a worktop, and the same kit lets you rack-mount two units side by side in a standard 1U space. Input sensitivity sits at -10dB on the line input, with a 1k Ohm input impedance. It runs from a 170-264Vac, 50Hz IEC mains supply. If you already have a 100V speaker line in place, this is a straightforward way to give it more headroom or add zones.

    Specification
    Output power : rms 60W
    Dimensions 269mm x 210mm x 44mm
    Weight 2.30KG
    Power supply 170-264Vac, 50Hz (IEC)
    Amplifier : construction Class D + transformer output
    Inputs Line (RCA), 100V (Euroblock +/-)
    Line output 2 x RCA (mono)
    Speaker output Euroblock terminals: 100V / 8 Ohm / Com
    Mute 24V relay contacts
    THD <0.4% @ 1kHz
    Input impedance 1k Ohm
    Input sensitivity -10dB (line)
    SNR 80dB
    Frequency response 100Hz - 18kHz
    Downloads

    Product Manual

    Frequently Asked

    Can the US60 extend an existing 100V speaker system?

    Yes. The 100V input on removable screw terminals lets you connect it in parallel with existing 100V speakers, so you can extend the system directly from the speaker cable.

    What speaker loads does it support?

    Mono output runs to either a 100V line or an 8 Ohm speaker load, connected via a separate Euroblock terminal on the rear panel.

    Does it have fire alarm muting?

    Yes. It has 24V relay contacts for fire alarm mute, so the amplifier can be silenced when the alarm is triggered.

    Can I rack-mount two units together?

    Yes. The supplied hardware can hold two US60 units side by side in a 1U rack space, or a single unit against a wall or under a worktop.

    What inputs are provided?

    There is an RCA line input, an RCA line output, and a 100V input on removable screw terminals for parallel connection.

    What power supply does it need?

    It runs from a 170-264Vac, 50Hz mains supply via an IEC connector.

    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.