Description
The ST-UBA2 is a two-channel unbalanced-to-balanced line amplifier that converts consumer-level signals to professional +4 dBu outputs. It accepts unbalanced sources such as CD players, cassette decks, computer sound cards and televisions. The module provides low-noise balanced outputs suitable for professional patch bays and monitoring systems.
Each stereo channel features independently adjustable gain from 2 dB to 22 dB and a summed mono output for subwoofer or mono monitoring connections. Dual-LED VU metering is provided for both left and right outputs to assist level setting and signal monitoring. The green LED indicates a range beginning 15 dB below +4 dBu and the red LED indicates +4 dBu peak.
Audio performance is specified with THD+N below 0.02% across 20 Hz to 20 kHz and IMD under 0.004%. Frequency response is flat within ±0.2 dB from 20 Hz to 20 kHz and noise is specified at less than -85 dB referenced to +4 dBu. Crosstalk performance is better than -75 dB at 1 kHz and better than -60 dB at 10 kHz for clean channel separation.
Connectivity includes two unbalanced line-level inputs with 10 kOhm input impedance and three balanced +4 dBu outputs (left, right, mono sum) with 150 Ohm output impedance. Input signal range is intended for consumer outputs in the -20 dBV to -10 dBV range and headroom exceeds 18 dB above +4 dBu. Power is ground-referenced 24 Vdc at 75 mA for integration into standard RDL powering systems.
The ST-UBA2 fits installation needs in broadcast racks, AV racks and field carts due to compact packaging and compatibility with other RDL modules. The mono sum output can feed monitors or subwoofer amplifiers while balanced outputs interface with professional consoles and recorders. Metering and adjustable gain simplify setup in mixed-signal environments.
The module is engineered for reliable audio conversion with robust analog circuits and low distortion components. It operates in ambient temperatures from 0° C to 55° C and ships in a compact cardboard package. The ST-UBA2 offers a straightforward solution for converting unbalanced consumer-level sources to studio-grade balanced outputs.
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
