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Adastra US90 Compact 100V Slave Amplifier

£15799
The RRP is the manufacturer's recommended retail price of the item.
incl. VAT
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Description

The Adastra US90 Compact Slave Amplifier is a versatile and efficient solution for extending commercial audio systems. Housed in a half-width 1U chassis, this 100V line amplifier is designed to integrate seamlessly with existing installations. With both RCA line input/output and a dedicated 100V input on screw terminals, it can be connected directly in parallel with installed 100V speakers, making expansion simple and flexible.

The US90 delivers mono output to either 100V line or an 8 Ohm speaker load, connected via secure screw terminal blocks. Built with a class D amplifier and transformer output, it combines efficiency with reliability, ensuring consistent performance for small to medium PA systems.

Key features include 24V fire alarm mute contacts for safety integration, rack-mounting hardware for side-by-side installation of two units, and the flexibility to wall-mount or fit under a worktop. Its compact size, dependable design, and ease of integration make the US90 an excellent choice for extending background music or paging coverage in commercial environments.

  • 24V fire alarm mute contacts
  • 100V input for connection in parallel with existing 100V speakers
  • Supplied with hardware for rack-mounting 2 units
  • 100V line or 8 Ohms operation
  • Note: Can expand an existing 100V speaker system directly from the speaker cable
Specification
Power supply 170-264Vac, 50Hz (IEC)
Inputs Line (RCA), 100V (Euroblock +/-)
Amplifier : construction Class D + transformer output
Line output 2 x RCA (mono)
Speaker output Euroblock terminals: 100V / 8 Ohms / Com
Mute 24V relay contacts
THD <0.4% @ 1kHz
Input impedance 1k Ohms
Input sensitivity -10dB (line)
SNR 80dB
Frequency response 100Hz - 18kHz
Output power : rms 90W
Dimensions 330 x 210 x 44mm
Weight 2.40kg
Downloads

Product Manual

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    Customer Reviews

     

    The Adastra US90 Compact 100V Slave Amplifier, designed in black for PA installations, includes a master volume knob labeled "Master" on the right. Below it are indicator lights showing volume levels: On, 20, 15, 10, and 5. With support for additional slave amplifiers and a 100V input capability, this model stands out in its class.
    AVSL

    Adastra US90 Compact 100V Slave Amplifier

    £15799
    Description

    The Adastra US90 Compact Slave Amplifier is a versatile and efficient solution for extending commercial audio systems. Housed in a half-width 1U chassis, this 100V line amplifier is designed to integrate seamlessly with existing installations. With both RCA line input/output and a dedicated 100V input on screw terminals, it can be connected directly in parallel with installed 100V speakers, making expansion simple and flexible.

    The US90 delivers mono output to either 100V line or an 8 Ohm speaker load, connected via secure screw terminal blocks. Built with a class D amplifier and transformer output, it combines efficiency with reliability, ensuring consistent performance for small to medium PA systems.

    Key features include 24V fire alarm mute contacts for safety integration, rack-mounting hardware for side-by-side installation of two units, and the flexibility to wall-mount or fit under a worktop. Its compact size, dependable design, and ease of integration make the US90 an excellent choice for extending background music or paging coverage in commercial environments.

    Specification
    Power supply 170-264Vac, 50Hz (IEC)
    Inputs Line (RCA), 100V (Euroblock +/-)
    Amplifier : construction Class D + transformer output
    Line output 2 x RCA (mono)
    Speaker output Euroblock terminals: 100V / 8 Ohms / Com
    Mute 24V relay contacts
    THD <0.4% @ 1kHz
    Input impedance 1k Ohms
    Input sensitivity -10dB (line)
    SNR 80dB
    Frequency response 100Hz - 18kHz
    Output power : rms 90W
    Dimensions 330 x 210 x 44mm
    Weight 2.40kg
    Downloads

    Product Manual

    View product
    Description

    The Adastra US90 Compact Slave Amplifier is a versatile and efficient solution for extending commercial audio systems. Housed in a half-width 1U chassis, this 100V line amplifier is designed to integrate seamlessly with existing installations. With both RCA line input/output and a dedicated 100V input on screw terminals, it can be connected directly in parallel with installed 100V speakers, making expansion simple and flexible.

    The US90 delivers mono output to either 100V line or an 8 Ohm speaker load, connected via secure screw terminal blocks. Built with a class D amplifier and transformer output, it combines efficiency with reliability, ensuring consistent performance for small to medium PA systems.

    Key features include 24V fire alarm mute contacts for safety integration, rack-mounting hardware for side-by-side installation of two units, and the flexibility to wall-mount or fit under a worktop. Its compact size, dependable design, and ease of integration make the US90 an excellent choice for extending background music or paging coverage in commercial environments.

    • 24V fire alarm mute contacts
    • 100V input for connection in parallel with existing 100V speakers
    • Supplied with hardware for rack-mounting 2 units
    • 100V line or 8 Ohms operation
    • Note: Can expand an existing 100V speaker system directly from the speaker cable
    Specification
    Power supply 170-264Vac, 50Hz (IEC)
    Inputs Line (RCA), 100V (Euroblock +/-)
    Amplifier : construction Class D + transformer output
    Line output 2 x RCA (mono)
    Speaker output Euroblock terminals: 100V / 8 Ohms / Com
    Mute 24V relay contacts
    THD <0.4% @ 1kHz
    Input impedance 1k Ohms
    Input sensitivity -10dB (line)
    SNR 80dB
    Frequency response 100Hz - 18kHz
    Output power : rms 90W
    Dimensions 330 x 210 x 44mm
    Weight 2.40kg
    Downloads

    Product Manual