Powerbass 3XL-652 6.5 Coaxials, ****. Spelled the title wrong.

I know nothing of sq but wanted to stay with Powerbass just because every thing else is and was wondering what you guys thought of these.

3XL Series Full-Range Speakers And Components Features:
3-OHM SYSTEM IMPEDANCE for more efficient use of amplifier power
HYBRID KEVLAR® / GLASS FIBER / PULP CONE designed to deliver the most accurate sound reproduction along with extended bass response
BUTYL RUBBER SURROUND for high efficiency and better bass response
LARGE PIVOTING SILK DOME TWEETER for accurate and smooth high frequency sound reproduction and balance
12dB INTERNAL CROSSOVER for accurate and responsive sound reproduction
CHROME PUSH INPUT TERMINALS to ensure the best current transfer from the amplifier to the speaker
PBX TUNER INSPIRED GRILL insures your speaker looks and sounds its best

• Power Handling Capacity (Peak) : 170W

• Power Handling Capacity (RMS) : 85W

• Nominal Impedancel : 3 ohm

• Frequency Response : 59Hz - 21kHz

• Sensitivity : 91 dB/W/M

• Motor Structure : 16 oz

• Mounting Depth : 2.4