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STM-3 High Gain Microphone Preamplifier - 35 to 75 dB Gain by RDL

SKU: STM-3
STM-3 High Gain Microphone Preamplifier - 35 to 75 dB Gain by RDL

STM-3 High Gain Microphone Preamplifier - 35 to 75 dB Gain by RDL

  • $261.77
Market price: $290.86, you save $29.09
  • 10% less
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  • Brand
    RDL
  • SKU
    STM-3
  • Weight
    1.00 lbs
  • Warranty
    3 Years
  • Condition
    New
  • Status
    Available
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In stock (50 items available)
The STM-3 is a quality low-noise microphone preamplifier designed for use in surveillance, commercial sound, broadcast, and recording where higher than normal gain is required. The STM-3 is very flexible, with gain adjustment from 45 to 75 dB, two ba
  • Brand
    RDL
  • SKU
    STM-3
  • Weight
    1.00 lbs
  • Warranty
    3 Years
  • Condition
    New
  • Status
    Available
Product availability status
Questions? Ask our experts!

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  • $261.77
Market price: $290.86, you save $29.09
  • 10% less
Make an Offer


The STM-3 is a quality low-noise microphone preamplifier designed for use in surveillance, commercial sound, broadcast, and recording where higher than normal gain is required. The STM-3 is very flexible, with gain adjustment from 45 to 75 dB, two balanced or unbalanced outputs, and available phantom supply input. Its low-distortion and low-noise performance make it the best choice, even when larger preamps could be used. The STM 3 supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. Each output drives high or low impedance loads.

Features

  • Low-Noise, High-Gain, Mic Preamp
  • Adjustable Output Levels
  • High or Low Impedance Mic Inputs
  • Mic Input to Line Outputs
  • Two Balanced or Unbalanced Outputs
  • Phantom Capability
  • RF-Filtered Inputs
Input: 500 O balanced; 5 kO unbalanced
Phantom: 24 Vdc; IEC 61938: 2013, Filtered
Output (2): +4 dBu 150 O balanced; -10 dBV unbalanced
Frequency Response: 50 Hz to 30 kHz (± 1.5 dB)
Gain: Adjustable 45 to 75 dB
THD+N: < 0.05% (50 dB gain)
CMRR: > 50 dB (50 Hz to 20 kHz)
Residual Noise: < -70 dB (below +4 dBu, 150 Q source)
Headroom: > 20 dB (24 Vdc supply); 14 dB (12 Vdc supply)
Phantom Power Input: 24 Vdc @ 10 mA maximum
Ambient Operating Environment: 0° C to 55° C
Power Requirement: GROUND-REFERENCED, 24 Vdc @ 25 mA
Dimensions: Height: 0.7 in. (1.7 cm); Width: 3 in. (7.6 cm); Depth 1.6 in. (3.9 cm)
Package Type: Cardboard Box
Package Dimensions: 2 x 2 x 4 in.
Shipping Weight: 0.195 lbs.
WEEE weight: 0.145 lbs.
Tariff code: 8518.40.2000
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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.

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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.

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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.

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Major Credit Cards: Visa, MasterCard, Discover and American Express.
Paypal: You can select an option of Paying with Paypal in our shopping cart.
Money orders: and personal checks or company checks (may take up to 10 days to clear).
Wire Transfer: ( Bank Transfer ) Only for the amount over $500. Contact us for the bank details.
Phone Orders: To place a phone order please call 1.888.902.3309 or 1.916.246.6264 and one of our Customer Service Representatives will take your order (8:00am - 6.00pm PST).

Purchase order: Fax purchase orders to 1.916.672.2557

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

  • Shipping Info
    We offer free ground shipping on every purchase of $300 and more for US and US territory. We deliver worldwide.
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  • Payment Methods

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  • Return Policy
    We Offer a 30-Day Money Back Guarantee
    Learn more