Image Dynamics IDQ10-D4 Series 10" Dual 4 ohm Subwoofer -50-300w -MSRP $199 -SALE	Product Code: IDQ10D4 Price: Check Latest Image Dynamics IDQ10V.2-D4  IDQ Series 10" Dual 4 ohm Subwoofer SQ / SPL Competition Level Subwoofer MSRP: $199 General Features RMS Power: 250 WATTS Maximum Power: 500 WATTS Impedance: DUAL 2 OHM VOICE COIL Sealed Box Volume (cubic feet): 25 - .50 CUFT Ported Box Volume (cubic feet): .75 - 1.00 CUFT Port Diameter (inches): 2.5" - 3.0" Port Lenght (inches): 13" - 15" Dual Voice Coil Sensitivity: 89 dB Frequency Response: 10-150 Hz Diameter: 10" Mounting Depth: 5.25" Cutout Diameter: 9.125" Vas (liters): 2.5 CUFT Fs (Hz): 26HZ Qts: 0.35 Xmax (milimetters): 13.2MM General Description IDQ V.2 Series Ultra Low Frequency Transducer The IDQ V.2 continues the very sucessful competition record of the original IDQ subwoofers. They feature increased SPL output and significantly smaller enclosure requirements. The all dual voice coil IDQ V.2 series have increased excursion, larger motor structures and higher power handling allowing them to play louder and lower with reduced distortion. The V.2 series of ultra-low frequency transducers satisfy both the hard-core entusiast and the audio expert with uncolored bass reproduction, impressive dynamics, proper tonal quality and bone crushing SPL. ...This combination of innovative engineering and durable high-quality materials, including Image Dynamics exclusive Unisurround and MIP cone technology, extend the V.2's performance beyond the abilities of woofers costing much more. Combined with outstanding durability and low measurable distortion the IDQ V.2 has no equal at its price.