Description
The ST-SSR1 is a compact 2×1 line-level audio switcher designed for silent switching between two balanced inputs to a single balanced output. It provides zero-contact solid-state switching to avoid mechanical relay artifacts and audible clicks. The module supports unbalanced connections when required and preserves signal integrity across professional audio systems.
Key features include two balanced line-level inputs, a balanced output, and user-selectable switching behavior that offers either fast or soft transitions. The SELECT input feeds the OUTPUT when the TRIG terminal is grounded; otherwise the OUTPUT is fed by the NORMAL input. LED indicators show the active input so system status is visible at a glance.
Performance metrics include nominal +4 dBu operation, THD+N below 0.05%, and headroom greater than 18 dB above nominal levels. Frequency response is essentially flat from 15 Hz to 20 kHz under bridging loads and remains within ±0.5 dB across standard audio ranges. OFF attenuation exceeds 80 dB ensuring effectively muted inputs when deselected.
The ST-SSR1 accepts control from simple grounded TRIG circuits requiring less than 0.5 mA, enabling control from open-collector logic, switches, or remote panels such as the RDL D-RC2ST and D-RT2. Terminals are provided for balanced inputs and output on a terminal block for secure connections in rack or enclosure installations. The unit is powered by a ground-referenced 24 Vdc supply at 40 mA.
This switcher is suitable for applications that require silent source selection and reliable muting, such as broadcast studios, conference systems, and live production environments. It performs reliably where audio continuity and low-noise switching are required and integrates easily into existing signal chains. The compact package and low power draw simplify deployment in rack systems and distributed installations.
Installation is straightforward with clear control logic and minimal wiring requirements. The ST-SSR1 operates in ambient temperatures from 0 C to 55 C and ships in a small cardboard package for simple storage. The design emphasizes dependable operation and predictable switching behavior in professional audio workflows.
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
