Description
The ST-GLA1 is a gated line amplifier that provides automatic switching and integral noise reduction for line-level audio. It produces a clean, muted output when signals fall below a user-set threshold and restores full level when audio resumes. This module is designed for reliable performance in audio installs and distributed systems.
Key features include self-gating to suppress unwanted noise, adjustable gain, and fast silent audio switching. The unit provides single-ended noise reduction and an open-collector logic output for control or triggering other equipment. Two LED indicators simplify threshold and gain adjustment.
Performance specifications include a frequency response of 10 Hz to 30 kHz within ±0.25 dB and THD+N under 0.2 percent. Headroom exceeds 16 dB above a +4 dBu reference and residual muted noise is below -95 dB. Switching time is 30 ms and muting attenuation is greater than 60 dB, ensuring transparent gating behavior.
Connectivity is flexible: the input and output may be wired balanced or unbalanced and the audio output is nominally +4 dBu into 150 ohms via terminal block. The detector bandwidth covers 20 Hz to 5 kHz for reliable speech and program detection. A ground-referenced 24 Vdc supply at 75 mA powers the module.
Typical applications include automatic mixing systems, input noise suppression for conventional mixers and amplifiers, and adding gated line-level control to distributed audio systems. The open-collector slave output can trigger other RDL modules or external devices to coordinate audio or logic functions. The unit is suitable for live venues, conference rooms, and installed sound systems.
Installation is straightforward using the terminal-block connections and simple front-panel adjustments for gain and threshold. The module operates in ambient temperatures from 0 C to 55 C and ships in a compact cardboard box. The ST-GLA1 delivers practical noise gating and level control in a compact module designed for integration into professional audio systems.
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
