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Compact black amplifier with front panel controls and rear connection terminals

Dayton Audio

Dayton Audio SA70 70W Amplified Subwoofer

SKU CH-Q5RX-4GMQZ

Compact amplified subwoofer module delivering 70 watts RMS into 4 ohms with auto-on, variable 40-180 Hz crossover and line or speaker-level inputs

  • Product typeAmplified Subwoofers
  • 70 watts RMS into 4 ohms delivers strong bass
  • 45 watts RMS into 8 ohms ensures clean low-frequency output
  • Auto-on circuit activates instantly when audio signal is detected
  • Variable low-pass crossover from 40 Hz to 180 Hz tailors frequency response
  • Line-level and speaker-level inputs connect to any audio system

Compact Amplified Subwoofer

The Dayton Audio SA70 is a 70W amplified subwoofer designed for car audio and desktop upgrades. Its built-in Class-AB amplifier delivers 45 watts RMS into 8 ohms and 70 watts RMS into 4 ohms from a 120 VAC supply. The sealed rear enclosure and auto-on circuit simplify installation in tight spaces.

Ideal for Single-Subwoofer Upgrades

This unit suits owners adding one compact subwoofer or a tactile transducer to an existing system. Line-level and speaker-level inputs connect to factory or aftermarket head units without extra adapters. Builders needing multi-channel amplification or more than 70 watts for larger drivers should consider separate components.

Variable Low-Pass Crossover Control

A continuously adjustable second-order low-pass filter sets the crossover point anywhere from 40 Hz to 180 Hz. This single control matches the subwoofer roll-off to main speakers and room acoustics, making it the specification that decides whether the SA70 integrates cleanly with your system.

How it compares

Measured against everything we stock in Car Subwoofers & Enclosures, at today’s prices. Recalculated every night.

Price $111.99
Cheaper than about 70% of the 268 comparable items (median $185.49).

Specifications

Product
Product typeAmplified Subwoofers

Questions about this item

How do I know the SA70 is delivering its rated 70 watts into a 4-ohm load after installation?

At 0.2 % THD the amplifier produces 70 watts RMS into 4 ohms; listen for clean, undistorted bass at normal listening levels and verify the auto-on LED illuminates when signal is present.

What cables and accessories are included with the SA70 and what must I provide separately?

The unit includes the amplifier with sealed rear enclosure and auto-on circuit; you must supply 120 VAC mains power, line-level or speaker-level signal cables, and a subwoofer or tactile transducer rated for 4 or 8 ohms.

Which crossover setting should I choose between 40 Hz and 180 Hz for my compact subwoofer?

Start near 80 Hz for typical compact subwoofers, then adjust the variable 2nd-order low-pass crossover between 40 Hz and 180 Hz until bass blends smoothly with your main speakers.

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