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.

• 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

• Input:RDL Format-A
• Input 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 Mode Power Consumption:< 0.3 W
• Sleep Mode Enable:Active at audio gain <-60 dB
• Ambient Operating Environment:0° C to 40° C Maximum; 20° C Recommended
• Power 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:0.41 lbs.