Continue Shopping View Cart
Markertek - The Future of Broadcast Supply

Call 800-522-2025
M-F 8:30am - 7pm EST

Free Shipping Promo Box

FREE SHIPPING No Minimum Order!

SHOP MARKERTEK EVERYDAY for all of your needs. Free shipping on almost every order placed on our website.
Special order & oversized freight intensive items ship at an additional cost. Continental US orders only.

Fast Economical International Shipping
Markertek makes it EASY for our international customers to get their orders!

At check-out you can view our very affordable international shipping rates that are ALL-INCLUSIVE with your GUARANTEED LANDED COST and NO SURPRISE FEES!

*Economy International Shipping delivery time is approximately 7-14 days. Economy International Shipping is available to select countries. Not all products are eligible.

Secure LoginClose X

Returning Markertek Customers

New Markertek Customers

Why Create an Account?

Creating a Markertek account now will save you time on future orders. You'll have full access to your order history and a personalized shopping experience.

RDL DB-TPA1A 3.5 W Audio Power Amplifier
    Questions? Ask a Markertek Expert:
    800-522-2025 Email

    RDL DB-TPA1A 3.5 W Audio Power Amplifier

    Manufacturer: Radio Design Labs

    Item #: RDL-DB-TPA1A   •   MFG #: DB-TPA1A




    The -TPA1A modules are two pair audio amplifier modules compatible with RDL Format A twisted pair products. Each -TPA1A receives stereo audio and 24 Vdc power through a rear-panel RJ45 jack. The left and right audio signals received on pairs B and C of the twisted pair cable are summed to mono and amplified. The amplified output level is set by an internal VCA which is controlled by a front-panel volume control. The VCA attenuator provides years of scratch-free gain adjustment.The -TPA1A circuits are all designed for low power consumption. 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. When the user reduces the audio level to minimum, the class D output stage is switched off. This sleep mode remains active until the user turns up the output level.The output drives either a 4 Ohm or 8 Ohm speaker. The speaker cable connects to the module using a detachable terminal block.The front panel does not include any illuminated indicators, making the -TPA1A ideally suited to installation in dark rooms or areas. Installation is simple and quick, requiring only the connection of the speaker leads and the twisted pair RJ45.The -TPA1A may be fed and powered from any RDL Format-A sender, and is ideal in hospitality installations fed from a sender connected to a TV monitor (for example: FP-TPS4A Audio Sender from TV with fixed audio output level).Use the -TPA1A wherever a single speaker user-adjustable wall mounted amplifier is needed. Combine the amplifier with other RDL Format-A products for a cost-effective, high-performance audio system.

    • Features

      • 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
      • Setting Level to Minimum Activates Energy-Saving Sleep Mode
      • High-Efficiency Class D Operation
      • VCA Level Adjustment for Scratch-Free Long Life
      • Input and Power Connection on RJ45
      • Connects to Format-A Sender using Twisted-Pair Cable
      • Powered from RDL Twisted Pair Format-A Sender
      • Speaker Output Connection on Detachable Terminal Block
      • Ultra-Compact All Metal Construction
      • Thermal and Short-Circuit Protection
    • Specifications

      • Input: RDL Format-AInput Connector: RJ45
      • Gain Adjustment: Single turn audio taper, VCA attenuator
      • Frequency Response: 50 Hz to 20 kHz (± 1.5 dB)
      • THD+N: < 0.1% (@ 1 kHz, 1 W)
      • Noise: <-70 dB (below 1 W RMS)
      • CMRR: > 60 dB (50 Hz to 120 Hz)
      • Output Power: 3.5 W RMS (max., into 8 Ohms); 6.5 W RMS (max., into 4 Ohms)
      • Sleep ModePower Consumption: < 0.3 W
      • Sleep Mode Enable: Active at audio gain <-60 dBAmbient Operating Environment: 0° C to 40° CPower Consumption: 45 mA (idle), 95 mA (1 W into 8 Ohms), 150 mA (1 W into 4 Ohms), 215 mA (3.5 W into 8 Ohms)Dimensions: Height: 4.13 in. 10.49 cm; Width: 1.7 in. 4.32 cm; Depth: 2.15 in. 5.47 cm
      • Package Type: Cardboard Box
      • Package Dimensions: 3.625 x 4.625 x 2.125 in.
      • Shipping Weight: 0.395 lbs.

    Add Accessories for your DB-TPA1A: