RDL DB-PA3 3.5W Decora Audio Amplifier, Black

The Radio Design Labs 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.

Radio Design Labs DB-PA3 Features:

• 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

Radio Design Labs DB-PA3 Specifications:

• Inputs (2): 20 kOhms 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 Requirements:
  • 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: .27 lbs.
• Tariff code: 8518.40.2000