Open Speaker (WA-9899 Accessory)

Product Code: WA-9900


The Open Speaker, designed for the study of sound wave properties, features a high-quality, 13.3 cm woofer mounted on a sturdy base with standard banana jack inputs. The Open Speaker is designed without a speaker cabinet to reduce the resonance of the air surrounding the rear of the speaker, thus making the Open Speaker perfect for resonance experiments wherein students can clearly hear resonant frequencies.


  • 13.3 cm woofer with a polypropylene cone
  • High efficiency 10 oz. magnet
  • Rugged aluminum brackets that hold the speaker perpendicular to the table
  • Standard banana plugs for power input


  • Study wave sound properties including frequency, amplitude, pitch, and wavelength
  • Explore the resonance of an air column using resonance tubes

Product Specifications

Frequency Response 75 – 8000 Hz
Impedance 8 ohms
Input Power 60 W (max)

Buying Guide

Requires One Of These P/N
Banana Plug Cord-Red (5 Pack) SE-9750
Banana Plug Cord-Black (5 Pack) SE-9751


Recommended Accessories P/N
Economy Resonance Tube WA-9495
Sine Wave Generator WA-9867

Support Documents

Open Speaker Manual