Performance Optimized Down Fire Sealed 10" Enclosure Morel Ultimo Ti SC102 / SC104 · Single 10" Sealed enclosure

Both, yes. The 2 ohm SC102 and the 4 ohm SC104 share one basket, one 8.87 inch cutout, one 10.35 inch frame and one 5.63 inch mounting depth, so the fit is identical and the inserts are pressed for both.

Any other 10, no. The airspace is engineered around the SC102's 0.38 Qts and 42.0 liters of Vas, and a different woofer that happened to drop into the hole would not see the alignment printed on this page.

Because the driver's 5.63 inch mounting depth sets the minimum cabinet height on the 30 by 15 platform, not the target volume. The motor reaches 4.13 inches into the cavity and needs 0.75 inch above it, which puts the cabinet at 7.13 inches tall and the airspace at 0.96 cubic feet whether the alignment wants it or not.

The result is a slightly over-damped alignment, Qtc 0.607 for the SC102 and 0.590 for the SC104, still inside Morel's own 13 to 30 liters, 0.46 to 1.06 cubic feet sealed range. Half power lands at 62.8 and 60.4 Hz. The wedge version of this cabinet, where depth is free, holds the 0.60 Butterworth volume.

Morel rates the Ultimo Titanium SC at 600 watts RMS, so target 420 to 600 watts RMS at the final impedance. Both coils are single voice coil drivers: the SC102 is a nominal 2 ohm load at 1.3 ohms DC, the SC104 a nominal 4 ohm load at 3.0 ohms DC.

A 2 ohm load from the SC102 is within most monoblocks' rating, but confirm your amplifier's minimum stable impedance before you buy that coil; the 4 ohm SC104 is the safe answer on any amplifier.

The cabinet is 7.13 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 8.88 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 driver, and here it is the driver's 5.63 inch motor that sets it.

The baffle is two bonded 3/4 inch sheets, 1.5 inches through. A subwoofer pushes as hard against its mounting surface as it does against the air, and a single 3/4 inch panel flexes under that load, which smears output and works the driver loose over time.

The outer layer is machined as a flush recess to Morel's 10.35 inch frame, so the driver bolts to the inner layer through pressed threaded inserts.

Anechoic F3 is 62.8 Hz for the SC102 and 60.4 Hz for the SC104, with system resonance at 52.7 and 48.9 Hz. Below Qtc 0.707 the rolloff is gentle and F3 sits above fc, which is what an over-damped sealed box does.

Those figures exclude cabin gain. In a car the transfer function of the cabin adds real output below 50 Hz, so in-vehicle response runs deeper than the numbers above. Morel's own sheet publishes no in-box F3 for this driver.

No. Polyfill is already installed 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 0.96 cubic feet this cabinet was built to.

No driver. This is an enclosure only. You receive the cabinet finished in plush black carpet, threaded inserts pressed to the Morel bolt pattern, stainless machine screws, one side-mounted pre-wired terminal cup, the standoffs and the polyfill lining already in place.

The Morel Ultimo Ti SC102 / SC104 is purchased separately. The cabinet is cut direct fit to that driver, so it is not a general purpose 10 inch box.