Description
The SF-MA100A is a 100 watt constant-voltage mono mixer-amplifier that accepts three Format-A audio inputs and provides a 70 V or 100 V output. It mixes the three Format-A pairs locally or via remote VCA control and passes Format-A signal and power pairs through to a loop-out jack. The unit is engineered for continuous duty in demanding installations and includes a 48 Vdc module power supply.
Key features include three selectable operating modes, internal VCAs for noise-free level control, a selectable audio compressor that adds up to 15 dB of headroom, and a dual-LED VU meter for installer metering. The amplifier uses a high-efficiency Class D output stage to minimize heat and improve reliability. Front and rear indicators provide Ready, Overload Shutdown and Format-A power status feedback.
Performance specifications provide useful headroom and clean output: 100 W RMS constant-voltage output, frequency response of +0/-3 dB from 50 Hz to 20 kHz, THD+N under 1% at full power, and noise floor below -85 dB at maximum power. The compressor features automatic attack and release timing for transparent dynamic control. The input CMRR exceeds 80 dB in the critical low-frequency band to reduce hum and interference.
Connectivity is centered on the RJ45 Format-A interface which carries three signal pairs and module power. The LOOP OUT RJ45 jack provides pass-through to additional Format-A receivers or amplifiers. Remote control options include RDL D*-RLC10KM master level controls or D*-RC3 three-channel wall remotes via the RJ45 VCA control, or direct 10 kOhm potentiometer or 0-10 Vdc control voltages.
The SF-MA100A is suited to paging, background music and distributed audio systems in schools, retail, houses of worship and corporate environments where constant-voltage speaker lines are used. It mixes multiple sources and can be controlled locally or remotely to fit different operational workflows. Loop-through Format-A outputs make it simple to expand multi-zone systems by daisy-chaining additional amplifiers.
Installation is straightforward with a compact all-metal enclosure that supports surface or rack mounting and an included IEC power supply providing 48 Vdc to the module. The unit is plenum rated to UL 2043 and includes thermal and short-circuit protection for long-term reliability. Installer-adjustable rear-panel pots set input gain and the VCA range for remote control, simplifying commissioning and maintenance.
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
