Performance Optimized Down Fire Sealed Dual 10" Shallow Sub Enclosure JBL Club 102SL · Dual 10" Sealed enclosure

The Club 102SL, yes, at either switch position: the SSI switch changes only the electrical load, not the frame. The baffle is cut to JBL's 9.00 in (228.6 mm) cutout, and the 10.52 in (267.3 mm) frame covers it with margin. The 3.25 inch motor clears the cabinet with 4.37 inch to spare. Run two set the same way so the chambers match.

Any other 10, no. The airspace is chosen around the Club 102SL's 1.097 Qts and 24.4 liters of Vas at 4 ohms, and a different woofer that happened to drop into the hole would not see the alignment printed on this page.

The Club 102SL is a high-Q woofer, Qts 1.10 at 4 ohms, and a sealed box can only raise system Q, never lower it below the driver's own. No sealed box of any size reaches the 0.707 of a flat alignment, so 0.60 cubic feet is chosen for the space: a little above JBL's own 0.53 cubic foot recommendation (Qtc 1.78) and inside its 0.42 to 0.69 range.

At the 4 ohm setting this cabinet reads Qtc 1.71 with system resonance at 54.6 Hz; at 2 ohms it is Qtc 1.88. At Qtc 1.71 the response rises about 5 dB to a peak near 60 Hz, returns to its reference level around 42 Hz and is 3 dB down at 37.4 Hz. Expect full, punchy upper bass rather than flat, deep extension.

JBL rates the Club 102SL at 350 watts RMS per driver and 1050 watts peak, so target 244 to 350 watts RMS per driver at the final load.

The Club 102SL has one voice coil and JBL's Selectable Smart Impedance (SSI) switch, which sets it to 2 or 4 ohms. Set both drivers the same. Both at 4 ohms and paralleled gives a 2 ohm load, the usual pairing on a mono amplifier; both at 4 ohms in series gives 8. Both at 2 ohms in parallel is 1 ohm and needs an amplifier rated for it. The 4 ohm setting is also the tighter alignment in this box. Confirm your amplifier's minimum stable impedance first.

The cabinet is 8.37 inches tall measured in the down fire position, and that figure excludes the standoffs. The standoffs hold 1.75 inches under the baffle, so plan your space around a finished stack of roughly 10.12 inches.

The footprint is the standard Performance Optimized down fire platform, 30.00 inches wide by 15.00 deep. Height is the only dimension solved to the drivers.

Two drivers sharing one sealed volume load each other: each driver's compression stroke becomes the pressure the other works against, which blurs the alignment either would have alone. A bonded full-height 3/4 inch divider gives each driver its own 0.60 cubic feet and its own polyfill.

It also means a failure in one driver does not unload the other, and the alignment on this page is the alignment in each chamber, not an average across a shared box.

Anechoic F3 is 37.4 Hz per chamber at the 4 ohm setting, with system resonance at 54.6 Hz. Above Qtc 0.707 a sealed box peaks before it rolls off: this one rises about 5 dB near 60 Hz and is back at its reference level around 42 Hz, so the F3 sits below the resonance rather than at it.

Those figures exclude cabin gain. In a car the cabin's transfer function adds real output below 50 Hz, so in-vehicle response runs deeper than the numbers above.

No. Polyfill is already installed in both chambers as a light wall lining to control internal reflections, and the quantity is chosen so it does not change the acoustic volume.

Do not add more. Packing a sealed box with fill makes it behave as though it were larger, which walks the alignment away from the 0.60 cubic feet per chamber this cabinet was built to.

No driver. This is an enclosure only. You receive the cabinet finished in plush black carpet, one side-mounted pre-wired terminal cup to both positions, the polyfill lining already in place, the standoffs, and a threaded insert kit with stainless machine screws.

The inserts ship loose on purpose: JBL prints no bolt circle for the Club 102SL, so you set the driver in the recess, mark its holes, drill and press the inserts. We sell the JBL Club 102SL separately (you need two).