Radio Design Labs - RDL DB-HA1A Format-A Stereo Headphone Amplifier (Black)

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Format-A Stereo Headphone Amplifier on Decora Wall Plate - Black Finish

The D SERIES-HA1A is a two pair receiver and audio headphone amplifier compatible with RDL Format A twisted pair products. Each -HA1A receives stereo audio and 24 Vdc power through a rear-panel RJ45 jack fed from a Format-A sender. The left and right audio signals received on pairs B and C of the twisted pair cable are amplified and fed to the left and right channels of the output 3.5 mm Mini-jack.

The front panel provides the headphone output jack and a single-turn user volume control. There are no illuminated indicators that could be distracting in dark locations, such as a hotel room. The audio input circuits feature very high common mode rejection and a high quality stereo headphone amplifier for superior audio fidelity and low-noise performance.

The -HA1A is ideally suited to guest room installations with bedside and restroom listening stations. The input is fully compatible with all RDL Format-A senders.

The -HA1A is equipped with two Format-A RJ45 jacks. Either jack may be used as the input. The other RJ45 may be used to connect an additional -HA1A or other Format-A receiver.

Installation is simple and economical. Standard twisted pair cable is used to connect a Format A sender to the -HA1A.

RDL FORMAT-A features superior audio performance that rivals or exceeds shielded wiring. Design simplicity, ease of installation, unsurpassed flexibility, automatic fused power, exceptional hum rejection, low noise, and low distortion provide designers and installers the optimum choice in economical twisted pair products.
  • Headphone Amplifier with User Level Control
  • Output on Standard Mini Jack
  • Mounts in a Wall or Cabinet
  • Input and Power Connection on RJ45
  • Connects to Format-A Sender using Twisted-Pair Cable
  • Powered from RDL Twisted Pair Format-A Sender
  • RJ45 Loop-Thru for Connecting Additional Modules
  • Protected by Automatically Resetting Fuse
  • Decora Design with All Steel Panel and Rear Enclosure
  • Input: RDL TP Format-A
  • Input Connection: RJ45
  • Format-A Signal Pairs Used (2): B, C
  • Format-A Output: RJ45 (loop-through)
  • Output: Stereo, 25 mW per channel (into 100 ohms)
  • Frequency Response: 10 Hz to 40 kHz (+/- 1 dB, into 100 Ohms)
  • THD+N: < 0.01% (1 kHz, 10 mW)
  • Noise: < -90 dB (maximum gain)
  • Crosstalk: < -85 dB (1 kHz); < -70 dB (20 Hz to 20 kHz)
  • Power Connection: RJ45 (power provided by Format-A sender)
  • Power Requirement: 24 Vdc @ 30 mA
  • Dimensions: 1.55" (3.94 cm) D; 1.72" (4.37 cm) W; 4.11" (10.44 cm) H
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Brand Radio Design Labs - RDL
Model DB-HA1A
Part Number DB-HA1A
UPC 813721015754
Product Category Headphone Amplifiers
Unit of Measure EACH
Shipping Weight 0.41 lbs.
Manufacturer Link
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