Pair of Seas Excel Woofers W18EX001 E0017-08, 8 ohm, 7 inch, Magnesium cone

Up for sale is a pair of woofers, not speaker cabinets, etc. These drivers are famous for their rigid construction, resulting in "piston" like movement. Great for DIY speaker build. I don't have the time or desire. Hopefully these will find use in someone else's system.These were sparingly used in a DEQX active crossover/amplifier speaker build of mine. There is an incredible amount of detail and resolution in these drivers. Lots of attack and slam. Probably one of the most crisp and clear sounding drivers - the music was just so "there".Precision cast and surface treated magnesium cone coupled to a natural rubber surround showing no sign of midrange (edge) resonances.Large magnet system with bumped back plate makes room for extreme coil excursions.Heavy copper rings mounted above and below the T-shaped pole piece reduce non linear and modulation distortion and increase overload margin.Extremely stiff and stable injection moulded metal basket keeps the critical components in perfect alignment.Large windows in the basket both above and below the spider reduce sound reflexion, air flow noise and cavity resonance to a minimum.Gold plated terminals mounted on a glass fibre reinforced plate to reduce contact resistance and improve reliability.Suggested box alignments:Sealed box of 0.15 cubic feet for an F3 of 115Hz. 50% fillingVented box of 0.3 cubic feet for an F3 of 63Hz. 1.5" diameter vent by 6.25" longVented box of 0.5 cubic feet for and F3 of 48Hz. 2" diameter vent by 6.25" long Nominal Impedance8 OhmsVoice Coil Resistance6.1 OhmsRecommended Frequency Range40-2500 HzVoice Coil Inductance0.65 mHShort Term Power Handling *250 WForce Factor8.4 N/ALong Term Power Handling*100 WFree Air Resonance34 HzCharacteristic Sensitivity (2,83V, 1m)88 dBMoving Mass15.5 gVoice Coil Diameter39 mmAir Load Mass In IEC Baffle0.82 gVoice Coil Height16 mmSuspension Compliance1.4 mm/NAir Gap Height6 mmSuspension Mechanical Resistance1.94 Ns/mLinear Coil Travel (p-p)10 mmEffective Piston Area126 cm?Maximum Coil Travel (p-p)19 mmVAS30 LitresMagnetic Gap Flux Density1.00 TOMS1.8Magnet Weight0.64 kgOES0.30Total Weight2.15 kgQTS0.26