Polk Audio 5 1/4" Center Channel Kit - Based on Polk 5 1/4" woofer

• (2) 5 1/4" Polk Audio Woofers (4 ohm) Shielded
• (1) 1" Silk Dome Tweeter (8 ohm) Shielded
• (1) Two Way Crossovers

• Power 20 to 150 Watts RMS Per Channel at 8 ohms
• Impedance 8 ohms
• Frequency response 40 Hz. to 20 kHz.
• Efficiency 90 dB at 1 watt at 1 meter

• 5.25" Polly Cone Shielded Woofer
• Impedance 4 ohms (you wire in series to get you 8 ohm load)
• Weight 3 pounds each
• Revc - 3.4679 ohms
• Fs - 56 Hz.
• Zmax - 68 ohms
• Qes - 0.4969
• Qms - 9.2893
• Qts - 4717
• Le - 0.3484 mH (at 1 kHz.)
• Vas - 22537.9746
• BL - 0.1401 N/A
• Sensitivity - 90 dB
• Frequency response 40 Hz. to 7 kHz.

• 1" Silk Dome Soft Tweeter
• 8 ohms
• Power 75 watts
• Sensitivity - 89 dB
• Frequency response 1.8 kHz. to 20 kHz.
• Weight .5 pounds each

If you buy two kits, you can use them to build a nice set of small towers, or a bookshelf speaker design.  Then use the vertical layout for best performance.

• • Cabinet requirements are pretty basic,  you should be fine keeping it around  .5 cf. Ported works well for these woofers.
  • Wiring; the crossover to the speakers is very straight forward.  We putting the woofers in series.  Take the positive lead from the crossover and connect to the positive terminal of woofer #1. Then you will need a length of wire. This wire connects between the negative terminal on woofer #1 and goes to the positive terminal on woofer #2. Finally you run a lead from the Woofer Negative terminal of the crossover to the negative tab of Woofer #2.This completes wiring the woofers in series.
  • Hooking up the tweeter is easy, you run a lead from the crossovers Tweeter positive terminal to the positive tab of the tweeter. Then from the crossovers negative Tweeter terminal to the negative tab of the tweeter.
• For best response use a tweeter centered design ( Horizontal Layout ), see picture below.
   
  Horizontal Layout 
  
  Click on an image to enlarge