Description
The D-HA1A is a compact Format-A stereo headphone amplifier designed to receive stereo audio and 24 Vdc power over a single twisted pair cable. It converts Format-A signal pairs into a 3.5 mm mini-jack headphone output and offers a user volume control on the front panel. The unit is optimized for low-noise listening environments and discreet bedside or in-room installations.
Key features include a single-turn user volume control, a standard 3.5 mm mini-jack output, and dual RJ45 Format-A jacks for input and loop-through. The audio input circuits provide high common mode rejection to minimize hum and interference in long twisted pair runs. There are no illuminated indicators to avoid distractions in dark locations such as hotel rooms.
Audio performance supports 25 mW per channel into 100 ohms with frequency response from 10 Hz to 40 kHz at ±1 dB. Distortion is specified at less than 0.01% THD+N at 1 kHz and 10 mW, and noise is below -90 dB at maximum gain. Crosstalk is better than -85 dB at 1 kHz and better than -70 dB across 20 Hz to 20 kHz.
Connectivity is via RDL Format-A over standard twisted pair cabling using RJ45 connectors. The unit uses Format-A pairs B and C for left and right audio and accepts 24 Vdc power supplied by the Format-A sender. One RJ45 jack may be used as input while the second provides loop-thru to additional receivers or modules.
The D-HA1A is a practical solution for guest room and hospitality audio where compact size and low visual impact are required. Typical applications include bedside listening, restroom audio stations, and other in-room audio endpoints requiring simple user control. The module delivers reliable headphone-level output without adding noise or interference to the signal chain.
Installation is straightforward using standard twisted pair cable and a Format-A sender for centralized audio distribution and power. The Decora style steel front panel and rear enclosure provide a clean appearance and secure mounting in a wall or cabinet. An automatic reset fuse protects the unit and connected Format-A power source while maintaining easy serviceability.
Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.
UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations. UPS Ground does not deliver on Saturdays, Sundays or Holidays.
USPS Priority Mail/USPS Express Mail
For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.
Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. AVProSupply has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.
International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.
Most items ordered from AVProSupply will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.
We Offer A 30-Day Money Back Guarantee:
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 30 days of the purchase date for a full refund. Our 30-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.
Refunds:
Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.
Exchanges:
If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.
No Returns/Exchanges on the following:
- TVs and monitors 20" and larger
- Special Order merchandise
- Any item indicated on the website as non-returnable
For more information see our official Return Policy
