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Dayton Audio SPA300-D 300 Watt Class-D Subwoofer Plate Amplifier
Product description
The Dayton Audio SPA300-D high-efficiency subwoofer plate amp packs big-amp features into a compact chassis that is ideal for installation into cabinets that can't accommodate bulky old-style amps.
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Highlights
300W RMS Output @ 4 ohms
Switchable 6 dB @ 30 Hz bass boost
Class-D output stage for highly efficient, well defined output
Manual and Auto on/off modes for compatibility with any automated system
Variable gain, crossover point and switchable phase controls optimize room integration
Switchable 120/240V input voltage
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Product details
Dayton Audio SPA300-D 300 Watt Class-D Subwoofer Plate Amplifier
The Dayton Audio SPA300-D high-efficiency subwoofer plate amp packs big-amp features into a compact chassis that is ideal for installation into cabinets that can't accommodate bulky old-style amps. A Class-D topology makes it small, but with the same output capability as a traditional amplifier topology. We've included everything that you need to connect the amp to your system and get maximum performance!

Class-D Excellence
The efficient class-D design keeps size and weight to a minimum while providing maximum power to your driver. SPA-D Amplifiers are perfect for subwoofer duty due to their high efficiency and low noise volume atlower frequencies making amplification selection easier than ever.


Connectivity
1. USB Power Supply - 5V 500mA USB power supply. This output will supply power when the amplifier is on or in stand-by mode.
2. Low-Level Inputs (Left/Right) - RCA Style jacks that will accept standard line level inputs from a pre-amp level source.
3. Output Lead for Subwoofer Driver - This rear mounted output lead connects the amplifier to the subwoofer driver
4. Power Input - This unit features an IEC Type power jack.
5. Power/Clipping LED - This LED indicator will display the current status of the amplifier.
6. Volume (Gain) - This control will match the amplifier's input sensitivity to the output of the pre-amp source.
7. Frequency (Low-pass crossover) - This sets the highest frequency the subwoofer will reproduce and has a range between 40-200Hz with a slope of 18dB/Oct.
8. Phase - This two-position switch helps to compensate for differences between the acoustical and electrical characteristics between the subwoofer and main speakers.
9. Auto Turn On/Off - When the "auto" position is selected the amp is in standby mode until an input signal is detected.
10. Bass Boost - This allows the user to add a 6dB boost to the response centered at 30Hz.
11. Voltage Selector Switch - This switch allows the user to select 115/120VAC or 230/240VAC operation.
12. Main Power Switch - Main power disconnect.

Specifications
Article numberSPA300-D
Rated power output300 Watts
Signal-to-noise ratio (SNR)101 dB
Distortion<1.5%
Frequency response20 - 200Hz
Input sensitivity200 mV
Power requirements115 - 230 VAC
Dimensions (H x W x D)18 x 6 x 21 cm
Dayton Audio SPA300-D
Dayton Audio stands for speaker excellence
Dayton Audio has been designing and manufacturing high-quality audio components for more than 20 years. The brand has made a name for innovation, high quality, and values. The products of this premium DIY audio brand are produced in North America, Europe, and Asia. Dayton Audio products have received acclaim worldwide throughout the years and are often compared favourably to similar items costing far more.
Dayton Audio woofers
The dominant component in a majority of loudspeaker designs, woofers are responsible for much of a system's tone and character. Don't underestimate this cornerstone element—Dayton Audio has the perfect woofer for every application and budget. Discover some of Dayton’s high-quality audio woofers, such as the popular Dayton Audio Ultimax UM18-22 from the powerful Ultimax Series, the Dayton Audio RSS390HF-4 featuring ultra-low distortion or check out the never-failing Dayton Audio PS95-8 full-range woofer.
Tweeters from Dayton Audio
Although they are the smallest driver in most loudspeakers, tweeters play an important role in our auditory information perception. Clarity, articulation, imaging—Dayton Audio tweeters make your speaker system come alive! Discover the immense popular Dayton Audio air motion tweeters and dome tweeters! Dayton Audio tweeters, such as the Dayton Audio AMTPRO-4, provide ultra-clean, detailed, and dynamic treble output.
Dayton Audio Drivers by Series
Dayton Audio has created a comprehensive selection of speaker components for every application and budget, all of which you can find at Nonsolospeakers. Find some of the Dayton audio most popular driver series below.
Dayton Audio Reference Series
Dayton Audio's Reference Series is dedicated to the pursuit of supreme low-distortion high fidelity audio reproduction. The Dayton Audio Reference RS100-4 for example comes with a rigid yet lightweight anodized aluminium cone, enhanced motors with distortion-reducing devices, and carefully optimized T/S parameters result in accuracy and detail that are second to none.
Dayton Audio Designer Series
The Designer Series by Dayton Audio was developed specifically with the speaker designer in mind. It is an affordable, attractive line of drivers that puts performance first. Careful engineering ensures that the Dayton Audio DS135-8 5" Designer Series Woofer can handle full rated power at the lowest possible frequencies—without exceeding Xmax. The series combines useful performance parameters with elegant style.
Dayton Audio Ultimax Series
Most low-frequency drivers smear, distort, or alter their input waveform. Ultimax DVC subwoofers by Dayton Audio, such as the Dayton Audio UM12-22 woofer, sweep a higher volume of air while preventing false, deceptive reproduction. They are designed to deliver powerful low-end response from modest-sized enclosures.
Dayton Audio amplifiers
Give your home entertainment system the power it deserves with an amplifier from Dayton Audio! Find out more about the Dayton Audio amplifiers, plate amplifiers, and amplifier modules. The manufacturer’s exceptional engineering, combined with rigorous testing, will provide you with years of faithful high-fidelity service. Find out more about some of the brand’s best-seller amplifiers, such as the Dayton Audio MA1260 & Dayton Audio MA1240a, as well as the Dayton Audio DTA 2.1 Bluetooth amplifier.
Dayton Audio Exciters & bass shakers
Exciters are compact devices that attach to surfaces and vibrate them mechanically. The vibrations translate into auditory information; the result is surprisingly musical and accurate. Test them on doors, ceiling panels, windows, projection screens—whatever excites you! Check out some of the brand's most sold exciters and transducers, such as the Dayton Audio DAEX32EP-4, DAEX30HESF-4, and the BST-1 bass shaker!
Dayton Audio Test & Measurement equipment
Design better speakers and optimize their in-room performance. Dayton Audio test and measurement products take the guesswork out of determining loudspeaker parameters and room interactions—providing an authoritative, easy-to-use method of achieving superior results. Discover the brand’s easy to use DATS V3 measurement system (the upgraded version of de Dayton Audio DATS V2) or take control of your audio system with the DSP-408 Digital Signal Processor.
Dayton Audio Home Audio Speakers
Dayton Audio not only offer audio component, amplifiers, and crossover components. In case you do not feel like a DIY project, pre-assembled home audio speakers from Dayton Audio might be the right alternative for you. These speakers are equipped with high quality audio components and offer a audiophile-friendly sound quality. The Dayton Audio B652-AIR 6-1/2" 2-Way Bookshelf Speaker with AMT Tweeter Pair, for example, are known for their pleated ribbon diaphragm AMT tweeters that add an extra portion of smoothness to the already overall great sound experience. Dayton Audio B652-AIR speakers take a big step up, thanks to the addition of a higher-quality AMT tweeter. The AMT's folded Kapton ribbon diaphragm moves more air but with less effort and distortion, for purer and satisfyingly dimensional sound.
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