Proline X Driv 850 | 8" 800W Subwoofer

Proline X Driv 850 — Main Description Proline X Driv 850 8" Dual Voice Coil Subwoofer | 800W RMS | D2 / D4 800W RMS / 1,600W Peak 61.1mm 4-Layer CCAW Coil 14mm Xmax Carbon Fiber Overlay Cone 156oz Ferrite Motor Cast Aluminum Basket An 8" That Doesn't Play Like One. The Proline X Driv 850 is an 8-inch subwoofer rated at 800 watts RMS — built for the installer or enthusiast who wants real output from a platform that still fits in underseat boxes, single-cab truck builds, and compact enclosures where a 10-inch simply won't go. With a 61.1mm voice coil, a φ170×50mm ferrite motor weighing 156 ounces, and 14mm of linear Xmax, the Driv 850 delivers output that punches well past its nominal size. The BL figures — 19.13 T·m on the D2, 23 T·m on the D4 — represent the kind of motor authority more commonly associated with competition drivers. At this price point, in an 8-inch platform, that specification is not standard. It is the reason the Driv 850 performs the way it does. The Cone: Engineered for 800 Watts At 800 watts RMS, cone behavior under high excursion is a legitimate engineering concern. A standard paper cone at this power level will begin to flex along the cone surface — a failure mode called cone breakup — which introduces harmonic distortion that becomes audible as harshness and congestion before any mechanical failure occurs. The Driv 850 uses a paper substrate with a carbon fiber overlay. The paper retains its natural internal damping characteristics. The carbon overlay raises the breakup threshold significantly, keeping the cone moving as a single pistonic unit through the full 14mm Xmax stroke. The result is accurate, high-output bass that holds together at full rated power — not just at moderate listening levels. Carbon Fiber Overlay — What It Actually Does The problem with pure paper at 800W: Cone surface flex introduces harmonic distortion at the top of the excursion range. The distortion is audible as harshness long before mechanical failure — meaning a driver can sound broken before it actually is. The problem with pure composite: Rigid cone materials eliminate natural damping, producing a harsh, aggressive character that is difficult to tune out downstream. The carbon overlay solution: Composite rigidity layered onto a paper substrate. The cone resists flex through the full stroke range while the paper underneath handles resonance damping. Linear output from the low end of the passband through the driver's full excursion range. 61.1mm 4-Layer CCAW Voice Coil A 61.1mm coil diameter is large for an 8-inch driver in this price class. Larger diameter means more wire in the magnetic gap — higher BL for a given magnet structure — and greater former surface area for heat dissipation. The aluminum former further improves thermal management over Kapton. The result is a coil that sustains rated power without thermal compression rolling off output under extended use. φ170×50mm Ferrite Motor — 156oz 156 ounces of magnet weight in an 8-inch driver is a significant motor structure. Combined with the 61.1mm coil, the BL product of 23 T·m (D4) produces the kind of motor authority that keeps the cone controlled through the full Xmax range at sustained high power — not just at moderate input levels where most drivers measure well. 14mm Linear Xmax 14mm of one-way linear excursion means the voice coil remains in the linear portion of the magnetic gap through the full stroke. Above linear Xmax, distortion rises sharply and motor control degrades. The Driv 850's 14mm specification gives it excursion headroom that keeps output clean at the top of its power handling range. Cast Aluminum Basket The cast aluminum basket maintains spider and surround geometry under the mechanical stress of a 156oz motor cycling at excursion. Combined with the polypropylene spider and rubber surround, the suspension is calibrated for controlled, accurate return — the Driv 850 is tuned for output that is clean as well as loud. Enclosure Recommendations The Driv 850's Qts of 0.52 (D2) to 0.57 (D4) makes it well suited to sealed and ported alignments. The lower Qts relative to the Driv 650 gives it better performance in higher-power ported builds where the enclosure volume is available to support the alignment. Sealed — 0.4 to 0.6 ft³ Net Tight, accurate bass that works well in musical daily driver builds and SQ applications. The Driv 850's motor authority translates to excellent transient control in a sealed alignment — fast, defined bass without the overhang that affects underdamped drivers in sealed enclosures. Ported — 0.6 to 0.85 ft³ Net, 35–40 Hz This is where the Driv 850 maximizes its output potential. Target 35–40 Hz tuning for a flat, high-output response through the driver's full operating range. Ideal for truck builds, hatchbacks, and any install where enclosure volume is available. Avoid tuning below 33 Hz — the driver's Fs and Vas are optimized for moderate tuning alignments. 1-Year Warranty Every Proline X Driv 850 carries a 1-year limited warranty covering manufacturing defects in materials and workmanship. Contact Audio Intensity directly — no third-party claims process. Impedance Configurations The Driv 850 is available in dual 2-ohm (D2) and dual 4-ohm (D4) configurations. Both variants share an identical mechanical platform — same basket, cone, magnet, and motor geometry. The D4 carries a higher BL figure (23 T·m vs. 19.13 T·m) due to the tighter winding geometry of the 4-ohm coil. D4 — Dual 4-Ohm (Default) Wires to a 2-ohm mono load when both coils are paralleled — the standard configuration for most monoblock amplifiers. BL of 23 T·m gives the D4 the highest motor authority in the Driv 850 lineup. The most common and recommended configuration for standard single-amplifier daily driver builds. D2 — Dual 2-Ohm Wires to a 1-ohm mono load when paralleled, for amplifiers specifically rated at 1 ohm. Can also run each coil on a dedicated channel of a 2-channel amplifier at 2 ohms per side. Two D2s wired in series present a 2-ohm load for dual-driver builds on a standard monoblock. The Driv 850. 800 Watts. 8 Inches. No Excuses. 800W RMS. Carbon fiber overlay cone. 61.1mm 4-layer CCAW voice coil. 14mm linear Xmax. 156oz ferrite motor. Cast aluminum basket. Available in D2 and D4. Shipping included.