RDL 3.5W Audio Power and Headphone Amplifier (Stainless Steel)

RDL 3.5W Audio Power and Headphone Amplifier (Stainless Steel)

RDL 3.5W Audio Power and Headphone Amplifier (Stainless Steel)


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Expected availability: 7-10 business days

Product Highlights

  • Wall-Mounted Amplifier with Two Outputs
  • Balanced Input on the Rear Panel
  • Speaker Output on the Rear Panel
  • Mini-Jack Headphone Output
  • Single Gain Adjustment
  • Output Drives 4 or 8Ω Speaker
  • Ultra-Compact all Metal Construction
  • Thermal and Short-Circuit Protection
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Color: Stainless Steel

RDL 3.5W Audio Power and Headphone Amplifier (Black)

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RDL 3.5W Audio Power and Headphone Amplifier (Stainless Steel) RDL 3.5W Audio Power and Headphone Amplifier (White)

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This item is noncancelable and nonreturnable.

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RDL DS-HPA3 overview

  • 1Description

The stainless steel 3.5W Audio Power and Headphone Amplifier from RDL features one line input, an amplified output to drive a 4 or 8Ω speaker and a separate headphone amplifier. It features a balanced line level input that may be connected unbalanced. The gain range accommodates standard unbalanced levels as well as professional balanced levels. Its amplified output levels are controlled by a front-panel volume control. This amplifier features a mini-jack headphone output on the front panel. When a headset is plugged in, the power amplifier may be switched off. The two recessed slide switches located on the top of the rear enclosure are set prior to mounting the module. One switch is provided for setting the input sensitivity. The mute switch determines whether the power amplifier operates when headphones are plugged in.

Amplification for the speaker output is provided by a high-efficiency Class D power stage with audio filtering tailored for crisp, pleasant audio clarity. The high-efficiency Class D output stage produces negligible heat for all levels of expected voice or music modulation. Furthermore, the amplifier is designed to be mounted in a wall box. Its front panel does not include any illuminated indicators, making it suitable for installation in dark rooms or areas. The wiring is connected through a rear-panel detachable terminal block and module operation is from a 24 VDC ground-referenced power supply.

Wall-mounted amplifier with two outputs
Balanced input on the rear panel
Speaker output on the rear panel
Mini-jack headphone output on the front panel
Setting to turn off power amplifier upon headphone connection
Mute amplifier using solid-state switching
Single gain adjustment for the speaker and headphone amplifiers
3.5W RMS audio amplifier into 8Ω
6.5W RMS audio amplifier into 4Ω
Output drives 4 or 8Ω speaker
High-efficiency Class D operation
Speaker output connection on detachable terminal block
Ultra-compact all metal construction
Thermal and short-circuit protection
UPC: 813721015914
In the Box
RDL 3.5W Audio Power and Headphone Amplifier (Stainless Steel)
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    RDL DS-HPA3 specs

    Input 20 kΩ balanced or unbalanced bridging
    Input Level +4 dBu nominal (balanced, low input sensitivity)
    -15 dBV nominal (unbalanced, high input sensitivity)
    Minimum: -18 dBu (balanced, maximum gain)
    Maximum: +22 dBu (low input sensitivity)
    +4 dBu (high input sensitivity)
    Gain Adjustment Single-turn audio taper (front-panel)
    Output Power Headphones: 10 mW into 100Ω (normal)
    30 mW into 100Ω (maximum)

    Speaker: 3.5 W RMS (maximum, into 8Ω); 6.5 W RMS (maximum, into 4Ω)
    Frequency Response Headphones: 20 Hz to 50 kHz (± 1 dB)
    Speaker: 20 Hz to 20 kHz (± 1 dB)
    Noise Headphones: < -85 dB (below 10 mW into 100Ω)
    Speaker: < -80 dB (below 1 W into 8Ω)
    THD+N Headphones: < 0.1% (20 Hz to 20 kHz, 10 mW into 100Ω)
    Speaker: < 0.1% 1 kHz, 1 W
    CMRR > 50 dB (50 Hz to 120 Hz)
    Power Requirement 24 VDC at 30 mA (idle)
    55 mA (1/8 power; normal voice or music)
    225 mA (3.5 W into 8Ω)
    Ambient Operating Environment Maximum: 32 to 104°F (0 to 40°C)
    Recommended: 68°F (20°C)
    Dimensions (W x H x D) 1.70 x 4.13 x 2.05" (4.32 x 10.49 x 5.21 cm)
    Packaging Info
    Box Dimensions (LxWxH) 4.63 x 2.13 x 0.41"

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