Radio Design Labs DS-PA3
3.5 Watt Decora Audio Amp, Stainless Steel

OUR PART #  DS-PA3


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 D-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 D-PA3 Specifications: 

  • Inputs (2): 20 k Ohm 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 WRMS (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 (1/8power; 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
3RU Rack Panel Mount for 9 Decora Models
Radio Design Labs RM-D9 3RU Rack Panel Mount for 9 Decora Models
Radio Design Labs' RM-D9 is a 3 RU rack panel that allows the mounting of 9 Decora products, such as RDL remote controls and D-Series connector plates. The installer can label each installed module behind an included protection lens.The ...
Single-Gang Universal Wall Box
Radio Design Labs WB-1U Single-Gang Universal Wall Box
Can be mounted in International or US walls and cabinets. Features side and rear mounting holes which secure the box in new construction. Also has folding tabs which secure the box in an existing wall or cabinet.Dimensions: Height: 4.125 ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Wall Plate, Single Cover Plate, White
Radio Design Labs CP1-W Wall Plate, Single Cover Plate, White
For use with RDL R style remote controls and D style connector plates; Mount with RDL WB-1U Universal Wall Box.
Desktop or Wall-Mounting Decora Remote Control or Panel Chassis (Gray)
Radio Design Labs DC-4G Desktop or Wall-Mounting Decora Remote Control or Panel Chassis (Gray)
Radio Design Labs' DC-4G desktop chassis holds four Decora®-style products, including RDL remote controls and connector plates.  Installation is facilitated using the included mounting plate, which allows the chassis to mount to ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Wall Mount Chasis for Decora
Radio Design Labs DC-2G Wall Mount Chasis for Decora
The DC-2G desktop chassis holds two Decora®-style products, including RDL remote controls and connector plates. Installation is facilitated using the included mounting plate, which allows the chassis to mount to a tabletop or on a ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Desk Top Chassis for Decora, White
Radio Design Labs DC-2W Desk Top Chassis for Decora, White
The DC-2W white desktop chassis holds two Decora®-style products, including RDL remote controls and connector plates. Installation is facilitated using the included mounting plate, which allows the chassis to mount to a tabletop or on a ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
1RU Rack Panel Mount for 3 Decora Models
Radio Design Labs RM-D3 1RU Rack Panel Mount for 3 Decora Models
Radio Design Labs' RM-D3 is a 1 RU rack panel that allows the mounting of 3 Decora products, such as RDL® remote controls and D-Series connector plates. The installer can label each installed module behind an included protection lens. The ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Wall Mount Chasis for Decora
Radio Design Labs DC-1G Wall Mount Chasis for Decora
The DC-1G desktop chassis holds one Decora®-style product, including RDL remote controls and connector plates. Installation is facilitated using the included mounting plate, which allows the chassis to mount to a tabletop or on a vertical ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Dual-Gang Universal Wall Box
Radio Design Labs WB-2U Dual-Gang Universal Wall Box
Can be mounted in International or US walls and cabinets. Features side and rear mounting holes which secure the box in new construction. Also has folding tabs which secure the box in an existing wall or cabinet.Dimensions: Height: 4.125 ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Double Cover Plate/Gray
Radio Design Labs CP-2/G Double Cover Plate/Gray
For use with RDL R style remote controls and D style connector plates; Mount with RDL WB-2U Universal Wall Box. 

Usually ships in 7-14 business days.
Need it sooner? Call us!
Single-Gang Gray Wall Plate for SMB-1, DC-1, WB-1U, Decora-Style Products
Radio Design Labs CP-1/G Single-Gang Gray Wall Plate for SMB-1, DC-1, WB-1U, Decora-Style Products
Radio Design Labs' CP-1G is for use with RDL SMB-1, DC-1 and WB-1U for mounting RDL remote controls and jack panels.  Compatible with Decora style products and American electrical boxes.Height: 4.55" (11.6 cm)Width: 2.80" (7.1 cm)

Usually ships in 7-14 business days.
Need it sooner? Call us!
Single Gang Decora Cover Plate in Stainless Steel
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The Radio Design Labs CP-1S is a single gang decora cover plate in stainless steel.Dimensions: 4.55" H x 2.8" W (11.6 x 7.1 cm)Package Dimensions: 2" x 3"Shipping Weight: 0.072 lbs

Usually ships in 7-14 business days.
Need it sooner? Call us!

Radio Design Labs DS-PA3
3.5 Watt Decora Audio Amp, Stainless Steel

OUR PART #  DS-PA3

Product Information:

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 D-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 D-PA3 Specifications: 

  • Inputs (2): 20 k Ohm 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 WRMS (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 (1/8power; 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
3RU Rack Panel Mount for 9 Decora Models
Radio Design Labs RM-D9 3RU Rack Panel Mount for 9 Decora Models
Radio Design Labs' RM-D9 is a 3 RU rack panel that allows the mounting of 9 Decora products, such as RDL remote controls and D-Series connector plates. The installer can label each installed module behind an included protection lens.The ...
Single-Gang Universal Wall Box
Radio Design Labs WB-1U Single-Gang Universal Wall Box
Can be mounted in International or US walls and cabinets. Features side and rear mounting holes which secure the box in new construction. Also has folding tabs which secure the box in an existing wall or cabinet.Dimensions: Height: 4.125 ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Wall Plate, Single Cover Plate, White
Radio Design Labs CP1-W Wall Plate, Single Cover Plate, White
For use with RDL R style remote controls and D style connector plates; Mount with RDL WB-1U Universal Wall Box.
Desktop or Wall-Mounting Decora Remote Control or Panel Chassis (Gray)
Radio Design Labs DC-4G Desktop or Wall-Mounting Decora Remote Control or Panel Chassis (Gray)
Radio Design Labs' DC-4G desktop chassis holds four Decora®-style products, including RDL remote controls and connector plates.  Installation is facilitated using the included mounting plate, which allows the chassis to mount to ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Wall Mount Chasis for Decora
Radio Design Labs DC-2G Wall Mount Chasis for Decora
The DC-2G desktop chassis holds two Decora®-style products, including RDL remote controls and connector plates. Installation is facilitated using the included mounting plate, which allows the chassis to mount to a tabletop or on a ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Desk Top Chassis for Decora, White
Radio Design Labs DC-2W Desk Top Chassis for Decora, White
The DC-2W white desktop chassis holds two Decora®-style products, including RDL remote controls and connector plates. Installation is facilitated using the included mounting plate, which allows the chassis to mount to a tabletop or on a ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
1RU Rack Panel Mount for 3 Decora Models
Radio Design Labs RM-D3 1RU Rack Panel Mount for 3 Decora Models
Radio Design Labs' RM-D3 is a 1 RU rack panel that allows the mounting of 3 Decora products, such as RDL® remote controls and D-Series connector plates. The installer can label each installed module behind an included protection lens. The ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Wall Mount Chasis for Decora
Radio Design Labs DC-1G Wall Mount Chasis for Decora
The DC-1G desktop chassis holds one Decora®-style product, including RDL remote controls and connector plates. Installation is facilitated using the included mounting plate, which allows the chassis to mount to a tabletop or on a vertical ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Dual-Gang Universal Wall Box
Radio Design Labs WB-2U Dual-Gang Universal Wall Box
Can be mounted in International or US walls and cabinets. Features side and rear mounting holes which secure the box in new construction. Also has folding tabs which secure the box in an existing wall or cabinet.Dimensions: Height: 4.125 ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Double Cover Plate/Gray
Radio Design Labs CP-2/G Double Cover Plate/Gray
For use with RDL R style remote controls and D style connector plates; Mount with RDL WB-2U Universal Wall Box. 

Usually ships in 7-14 business days.
Need it sooner? Call us!
Single-Gang Gray Wall Plate for SMB-1, DC-1, WB-1U, Decora-Style Products
Radio Design Labs CP-1/G Single-Gang Gray Wall Plate for SMB-1, DC-1, WB-1U, Decora-Style Products
Radio Design Labs' CP-1G is for use with RDL SMB-1, DC-1 and WB-1U for mounting RDL remote controls and jack panels.  Compatible with Decora style products and American electrical boxes.Height: 4.55" (11.6 cm)Width: 2.80" (7.1 cm)

Usually ships in 7-14 business days.
Need it sooner? Call us!
Single Gang Decora Cover Plate in Stainless Steel
Radio Design Labs CP-1S Single Gang Decora Cover Plate in Stainless Steel
The Radio Design Labs CP-1S is a single gang decora cover plate in stainless steel.Dimensions: 4.55" H x 2.8" W (11.6 x 7.1 cm)Package Dimensions: 2" x 3"Shipping Weight: 0.072 lbs

Usually ships in 7-14 business days.
Need it sooner? Call us!
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