以1800來推...的確AR17的CP值跟效率較容易推

AR17 (91dB)

Dimensions (HxWxD): 13" x 8" x 7 1/2"
Driver complement: Plasma Transferred Diamond Hardened 1" Titanium Dome Tweeter
6 1/4" MagAlloy Monocoque Woofer
All transducers are Magnetically Shielded
Frequency response: 40Hz-23KHz ±2dB
Crossover frequency: 3.2KHz
Sensitivity: 91dB @ 2.83 Volts/Meter
System impedance: 8 Ohms Nominal
Recommended amp. power: 20 Watts~150 Watts
Finish: Black ash, cherry woodgrain
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Polk audio

LSi7 (88dB)

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Driver Complement
Mid/Woofer 1 - 5-1/4" Diameter (13.34cm)
Dynamic Balance with Aerated Polypropylene cone, cast basket and rubber surround (shielded)
Tweeter 1 - 1" Diameter (2.54cm)
Dynamic Balance Ring Radiator (shielded)
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Overall Frequency Response 45Hz - 27kHz
Lower -3dB Limit 53Hz
Upper -3dB Limit 26kHz
Nominal Impedance 4 ohms
Recommended Amplifier Power 20 -150 w/channel
Efficiency 88 dB
Crossover 2.4kHz; HPF 18dB/oct, LPF 12dB/oct.
Inputs Dual 5-way binding posts for bi-amp/bi-wire


RTi38 (89dB)

Mid/Woofer 1 - 6-1/2" Diameter (16.51cm)
Dynamic Balance® driver, shielded
Tweeter 1 - 1" Diameter (2.54cm)
Dynamic Balance® silk/polymer composite dome, shielded
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Electrical
Overall Frequency Response 38Hz-27kHz
Lower -3dB Limit 49Hz
Upper -3dB Limit 26kHz
Nominal Impedance 8 ohms
Recommended Amplifier Power 20-150 w/channel
Efficiency 89 dB
Crossover 2.2kHz between mid-bass drivers and tweeter; 2nd order HP/LP complement
Inputs 5-way binding posts