SoundTube Channel Class D Amplifier

The SA502 amplifier has a 34 dB maximum gain with 2 x 50 watt output. The amp includes three operating modes: stereo, mono or bridged mono as well as three user selectable inputs: balanced stereo (Euroblock), stereo unbalanced mini jack, or high level Euroblock. 


The SA502 amp has an external 12-32 V trigger, signal detecting auto standby to conserve energy, and dual concentric gain controls for independent channel control. 20 Hz- 20 kHz frequency response. 120 Hz high pass switch. Small size- 1.2″ x 3.9″ x 4″. Rugged aluminum housing.

  • ColorBlack
    Manufacturer’s Suggested  
    Manufacturer’s CategoryAmplifiers
    Depth4 in / 101.6 mm
    Height1.2 in / 30.48 mm
    Width/Diameter3.9 in / 99.06 mm
    Shipping Weight3.1 lbs / 1.41 kg
    Carton Height3.5 in / 88.9 mm
    Carton Length10.5 in / 266.7 mm
    Carton Width9.5 in / 241.3 mm
    CertificationsCE, RoHS, UL60065, ETL-C/US, FCC
    Included Accessories3-Pin Euroblock, 4-Pin Euroblock, Mounting Hardware, Power Supply, Stereo RCA Adapter
    Optional AccessoriesRack Mount Adapter (AC-SA502-RMA)|Power Supply (AC-PS3240)|UK Power Cord (AC-PSCORD-EU2)|EU Power Cord (AC-PSCORD-EU2)|China Power Cord (AC-PSCORD-CH2)
    Input Impedance47K Ω Line Level, 600 Ω Balanced
    Output TypeEuroblock
    Power Requirements32 v DC 3.75A
    Voltage Gain34 dB
    Frequency Response (± 3 dB)20 Hz – 20 kHz
    Magnetically BoostedNo