SDS-250 Power Amplifier Kit

SDS-250 Power Amplifier Kit
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Price: $320.00
Product ID : SDS-250 Kit
Manufacturer: Class D Audio USA
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SDS-250 Class D Audio Kit with Large Power Supply, AnTek 400VA Transformer, Molex Connectors for external LED's, power switch, and gain controls. High Quality Conductive Plastic Element External Gain Controls also included. Our new Super D Series audio power amplifiers are built on the highly acclaimed reputation of our CDA series amps. Our goal was to keep the excellent sonic qualities while adding a state-of -the art balanced input stage (also accepts standard single ended input) and external adjustable gain controls. We've also added a better cooling system, Molex connectors for external LED's, power switch, and gain controls (included). The balanced input stage is one of the finest available and normally only found on very expensive high-end equipment. When using single ended inputs, you can change a jumper to select inverted or non-inverted input as well... useful in some instances. The gain controls included with this kit feature a conductive plastic element for ultra low noise. Our Super D Series amps provide more life-like imaging and sound stage, along with the beautiful smooth tube-like sound we're known for. These amps are powerful, clean, quiet , and transparent. Specifications: · Output: 250 X 2 - 4 Ohm, 125 X 2 - 8 Ohm · Bridged Output: 500W X 1 - Bridged 8 Ohm (Full Bridge) · THD+N, 1W - 1KHz: Better than .02% · Dynamic Range: 101 db · Efficiency: Over 90% · Required Power Supply: +/- 40 Volts DC to +/- 50 Volts DC Accepts Balanced or Single Ended inputs at up to 18 volts. More specs coming soon. 1 Year Parts and Labor Warranty

Model SDS-250
Number Of Channels 2
RMS Power Per Channel 8 Ohms 125W RMS X 2
RMS Power Per Channel 4 Ohms 250W RMS X 2
RMS Power in Bridge Mode 500W Into 8 Ohm Only. Single Channel
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 Adjustable
Voltage Gain for XLR Input Adjustable
Power Requirements +/- 42 Volts DC to +/- 50 Volts DC
Dimensions (W x H x D) Inches N/A
Dimensions (W x H x D) Millimeters N/A
Product Weight (lbs/kg) 14/ 6.4
Shipping Weight (lbs/kg) 15/ 6.8
Manufacturer Class D Audio

Product Reviews

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Reviewed by jdaviswoody
05/19/2017 - 07:22:14 PM
Awesomely Simple and Clean Amplifier Kit
I just finished a DIY project using the SDS-250 Kit. I paired the SDS-250 with a Raspberry Pi 3 and a HiFiBerry DAC+ PRO to make the ultimate all-in-one-box audio server. Using the ShairPort-Sync software package on the Pi, I can stream lossless audio over AirPlay from services like Tidal and iTunes. I have a relay coupled to the Pi to turn the amp off when not in use. The net-net is that I have a 100% no compromise, ultra-high-end music player that I can control completely from my iPhone, without even having to use a special streaming app (direct through AirPlay). I never touch the box.

I've been powering some pretty challenging loads, and the sound is not at all boxy, dynamically flattened, or thin. Even with a computer and a separate 5V switching power supply in the same enclosure and sharing the same AC mains, the noise floor is very low at all volume levels, and the highs are bright but not at all harsh. It's just a very clean and natural sounding amp. What's not to love!

I should add that my shipment came in two packages, one for the amp and one for the power supply. They arrived on two different days. After receiving the first package, I was worried that I only received half my order, and I left Tom a message. He called me back immediately, assured me the second half of the order was coming, and verbally walked through the potentially tricky parts of the wiring. He was incredibly friendly and confidence-inspiring, and made me promise to call him back if I had *any* problems. You don't expect service like that these days!


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