AC 650

6.5" 2-way bookshelf speaker with a sensational soft dome tweeter for extreme accuracy. Pinnacle's own patented Diaduct bass port ensures superior bass from a small speaker. Can be used as main speakers in your Home Theater / audio system or as your primary set of music listening speakers. The extreme accuracy of the AC650 makes it a great choice for recording or music studios.

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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.


  • Gold plated binding posts
  • 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 soft dome tweeter

  • 6 1/2" fibercone woofer with rubber surround

Frequency Response: 40-21 kHz (+/- 3 dB)

Crossover Frequency: 2.5 kHz

Recommended Amplifier Power: 20-150 Watts RMS per channel

Operative Power Range: 5-85 Watts RMS Continuous, 250 Watts Peak

Sensitivity: 91 dB (2.83 Volts Pink Noise @ 1 Meter)

Nominal Impedance: 8 Ohms

Dimensions: 9 5/8" Wide x 16 5/8" High x 8 3/4" Deep

Finish: Premium Black or Cherry Vinyl

Weight: 30 lbs. per pair

User Reviews

Love your speakers! - Doug Hendrix

We use these for reference monitors in our video editing suite. - A.W. Studios

..excellent speakers and well made. - Pierre Lacombe

I am extremely impressed. They sound absolutely great. Thanks for the engineering, I really appreciate your craft. - Calvin Michael 

I am writing to tell you how astounded I am at the quality. This is not a rave originating from a novice weaned on Bose... I am impressed with your achievement. - Jack Gilvey

These things always amaze me after many years. These little 6.5's rip and sound awesome!
- Ken S.

I love my AC-650's! - Stan

...enjoying the wonderful full range sound.. - Jim I.

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