Radio Design Labs RDL-DS-PA3

Availability: Available Unavailable

Product Type: Pro Audio

Product Vendor: Radio Design Labs

Product SKU: RDL-DS-PA3

Overview The D SERIES-PA3 is a high efficiency 3.5 W power amplifier with two line inputs and an amplified output to drive a 4 or 8 ohm speaker. The -PA3 features a balanced line level input that may be connected...

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ATTENTION! TARIFFS AND INDUSTRY IMPACT: All Pricing is subject to change without notice due to industry wide Tariff increases with several major manufacturers. Please check with your sales rep for current and updated pricing information prior to ordering. Quotes are only valid for the day they are provided. Returns for credit - New product may be approved to be returned for credit within 30 days of original packaging. Product must be new, unopened and in original packaging Returns and canceled orders are subject to a 25% restocking fee. -MANY ITEMS ARE CURRENTLY ON BACKORDER. PLEASE VERIFY PRICING AND AVAILABILITY ON ALL PRODUCTS WITH YOUR SALES REP VIA CHAT, EMAIL, OR PHONE BEFORE PLACING AN ORDER

Product Details


The D SERIES-PA3 is a high efficiency 3.5 W power amplifier with two line inputs and an amplified output to drive a 4 or 8 ohm speaker. The -PA3 features a balanced line level input that may be connected unbalanced. The gain range will accommodate standard unbalanced levels as well as professional balanced levels.

The amplifier features a stereo Mini-Jack input on the front panel. The input is designed to receive standard -10 dBV consumer level signals from sources such as a computer or personal media player. The left and right audio signals received on the Mini-Jack are summed to mono and amplified. When a source is connected, the rear-panel input is switched off. The amplified output level is controlled by a front-panel volume control.

A recessed slide switch on the side of the chassis is set during installation. This switch determines the sensitivity of the balanced rear-panel input.

Amplification 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.

The D SERIES-PA3 is designed to be mounted in a wall box. The front panel does not include any illuminated indicators, making the -PA3 ideally suited to installation in dark rooms or areas. Wiring is connected through a rear-panel detachable terminal block. Module operation is from a 24 Vdc ground-referenced power supply.


  • Wall-Mounted Amplifier with 2 Inputs
  • Balanced Input on the Rear Panel
  • Mini-Jack Input on the Front Panel
  • Automatic Switching Between Inputs
  • Source Selection Using Solid-State Switching
  • Front-Panel Gain Adjustment
  • 3.5 Watt RMS Audio Amplifier into 8 Ohms
  • 6.5 Watt RMS Audio Amplifier into 4 Ohms
  • Output Drives 4 or 8 Ohm Speaker
  • Speaker Output on the Rear Panel
  • High-Efficiency Class D Operation
  • Speaker Output Connection on Detachable Terminal Block
  • Ultra-Compact All Metal Construction
  • Thermal and Short-Circuit Protection


Inputs (2) 20 k? balanced or unbalanced bridging
Input Level +4 dBu nominal (Balanced, Low input sensitivity); -15 dBV nominal (Unbalanced, High input sensitivity)
Minimum Input Level -18 dBu (Balanced, Max. gain); -19 dBV (Unbalanced Mini-Jack, Max. gain)
Maximum Input Level +22 dBu (Low input sensitivity); +4 dBu (High input sensitivity)
Gain Adjustment Single-turn audio taper (Front-panel)
Output Power 3.5 W RMS (Max., into 8 ohms); 6.5 W RMS (Max., into 4 ohms)
Frequency Response 20 Hz to 20 kHz (± 1 dB)
THD+N < 0.1% (@ 1 kHz, 1 W)
Noise < -80 dB (below 1 W RMS, balanced input); < -70 dB (below 1 W RMS, Mini-Jack input)
CMRR > 50 dB (50 Hz to 120 Hz)
Power Requirement 24 Vdc @ 30 mA (Idle); 55 mA (1/8 power; normal voice or music); 225 mA (3.5 W into 8 ohms)
Ambient Operating Environment 0° C to 40° C Maximum; 20° C Recommended
Dimensions Height: 4.13 in. 10.49 cm; Width: 1.7 in. 4.32 cm; Depth: 2.05 in. 5.21 cm
Package Type Cardboard Box
Package Dimensions 3.625 x 4.625 x 2.125 in.
Shipping Weight .405 lbs.
WEEE weight .270 lbs.
Tariff code 8518.40.2000

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