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Perfect for powering compact subwoofersThe SA25 is the perfect solution for adding bass reinforcement to smaller speaker systems or custom installations. Its compact form factor allows it to fit easily into tight spaces such as desktop subwoofers, furniture-integrated systems, or compact home theater enclosures. Despite its small size, it provides the power and control needed to give your system a solid low-frequency foundation—ideal for music, gaming, or media playback where tight, responsive bass enhances the experience.
A continuously variable low-pass filter ranging from 60 Hz to 180 Hz makes it easy to dial in the perfect crossover point between your main speakers and subwoofer. The amplifier’s 25 W RMS output is conservatively rated and capable of driving 4 Ω loads with low distortion, maintaining clarity even at higher levels. Both line-level and speaker-level inputs make integration simple with virtually any audio source or amplifier, giving you flexibility for DIY or retrofit projects.
Designed with longevity in mind, the SA25 includes a speaker-relay circuit that eliminates the pops and thumps common when powering off or changing inputs, protecting your driver from unnecessary stress. A compact 6¼″ × 6¼″ plate size makes mounting straightforward, while Dayton Audio’s five-year warranty backs every unit with dependable support. The SA25 combines clean sound, practical features, and long-term reliability in one small but capable subwoofer amplifier.
Specifications:Output channels: 1Output power (8 ohms): 15 watts RMS @0.1% THDOutput power (4 ohms): 25 watts RMS @ 0.2% THDFrequency response: 20 to 200HzSNR, A-weighted: 90 dB Inputs: 2 x RCA, 2 x High (Speaker) levelPower requirements: 120 VACDimensions: 6-5/16" x 6-5/15" x 2-9/16" Cutout dimensions: 5-1/4" x 5-1/4"Weight: 2 lbs.3D-Printable Rear EnclosureDayton Audio now offers a 3D printable rear enclosure plate designed specifically for the SA25 amplifier. This precision-fit back plate provides an airtight seal to prevent air leaks that can compromise subwoofer performance, while occupying less than 0.035 cubic feet—only 60 cubic inches—of internal volume. To achieve the best strength and acoustic isolation, we recommend printing with 2 wall layers and 40% infill. The result is a low-profile, airtight design that preserves cabinet volume, simplifies installation, and gives your subwoofer a clean, professional finish.
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.