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SDS-440CS featuring SDS-440C Class D Audio amplifier with choice of Balanced XLR or RCA inputs, fixed gain, so does not have gain controls.

Shipping Time

All of our complete amp and modules are custom made to order, tested, and run in before shipping. Ship time is 2 to 3 days in most cases.

SDS-440CS featuring SDS-440C Class D Audio amplifier with Your choice of Balanced XLR or RCA inputs, fixed gain, with no gain controls. This amp features our State of the Art aluminum Powder-Coated Enclosure and one of our top of the line SDS amplifiers. 220W RMS Per Channel into 8 ohms, 440W RMS Per Channel into 4 Ohms. Size: 12" X 12" X 3.5" Shipping Weight 20 Pounds. Choice of Brushed Silver or Brushed Black Front.

Available in 115VAC and also 230VAC for International Customers.


Model SDS-440CS
Number Of Channels 2
RMS Power Per Channel 8 Ohms 220W RMS X 2
RMS Power Per Channel 4 Ohms 440W RMS X 2
RMS Power in Bridge Mode N/A
Input Sensitivity 2V
Total Harmonic Distortion (THD) Better than .02% (normal listening is about .003%)
Frequency Response 10hZ to 35KHz
Input Impedance RCA 30K
Input Impedance XLR 45K
Voltage Gain for RCA Input 30
Voltage Gain for XLR Input 30
Power Requirements 110VAC or 230VAC
Dimensions (W x H x D) Inches 12" X 3.5" X 13"
Dimensions (W x H x D) Millimeters 304.8 X 89 X 330.2
Product Weight (lbs/kg) 18/ 8.2
Shipping Weight (lbs/kg) 20/ 9.1
Manufacturer Class D Audio
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More Information 

Thank you for taking the time to visit us here at Class D Audio Inc. Please read on and learn a little about who we are, what we do, and how we are able to provide fantastic Made in the USA products at prices you can afford.

We manufacture Class D Audio equipment... not just any equipment, but what we believe to be some of the finest Class D Audio amplifiers and related equipment available today. Have a listen, and if you're not completely satisfied, return it for a full refund!

Don't let the low prices fool you...

We're a small company, and what better way to grow than to offer exceptional products at exceptional prices. We also provide customer service and support that's second to none. You can read some customer reviews by clicking the "Testimonials" link in the middle section of our home page and see what actual customers and others have to say about our products.

One of the questions we get asked so often is:

How come the price of Class D Audio products are so low compared to other companies?
Well the fact is, we actually use better parts, components, and materials than most of our competition, and you will spend in most cases, several times more for products like ours. We actually design and manufacture all of our products ourselves here in the USA. Our products are then sold directly from us to you with no middleman. Keep in mind, the actual product you purchase is not all you pay for when you purchase audio equipment from our competitors! Cut out the endorsement fees, wholesale/distributor mark-up, retail profit, advertising and marketing expenditure, and it's possible for us to provide our customers with a super high-quality product for an extremely reasonable price.