AC 400

4" 2-Way Compact Bookshelf Speaker Rated #1 From The Leading Consumer Reporting Magazine! Great bass from our patented Diaduct port. Outstanding in your Home Theater system, or as a fullrange music speaker in your audio system. Try using 4 with a powered subwoofer and center channel for a great complete compact Home Theater system.

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Their stereo presentation was flawless ... I cannot imagine another speaker in its price range that can surpass its overall sound quality." "... I tried to find their Achilles heel, but it eluded me. It ... could go toe to toe with others many times its price and more than hold its own.


  • Video shielding allows placement near TV without interference
  • Hardware in place for easy wall-mount installation
  • 7 Year Transferable Warranty on parts & labor
  • Designed and Manufactured in the USA

System Type: 2-Way, 4th Order rear vented with patented Diaduct tuning

Component Drivers:

  • 3/4" liquid cooled polyamide dome tweeter
  • 4" fibercone woofer with rubber surround

Frequency Response: 60-21 kHz (+/- 3 dB)

Crossover Frequency: 5.5 kHz

Recommended Amplifier Power: 20-100 Watts RMS per channel

Operative Power Range: 5-50 Watts RMS Continuous, 150 Watts Peak

Sensitivity: 88 dB (2.83 Volts Pink Noise @ 1 Meter)

Nominal Impedance: 8 Ohms

Dimensions: 6" Wide x 9 1/4" High x 7" Deep

Finish: Premium Black Vinyl

Weight: 14 lbs. per pair

User Reviews

I have (these in a) surround system setup since 1996 and love them. - Chad Wherry

I own 4 AC400 bookshelf speakers which I absolutely love. - Curtis Hulett

Your speakers are AWESOME! - Bill Paplawsky

I just bought a pair of AC-400s and I am very impressed. Thanks for making such a quality speaker! - Mark Mielcarek

…dollar for dollar you are the best without a doubt!! - Smash7391

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