Performance Optimized Wedge 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.

It is the Butterworth volume for the SC102, computed from Morel's published Fs 33.00 Hz, Qts 0.38 and Vas 42.00 liters: system Qtc 0.707, maximally flat, with resonance at 61.4 Hz and an anechoic half-power point of 61.4 Hz. Morel's own sealed recommendation for this driver is 13 to 30 liters, 0.46 to 1.06 cubic feet, and 0.60 cubic feet sits inside it.

The 4 ohm SC104 has its own parameter set, Fs 29.00 Hz, Qts 0.35 and Vas 50.00 liters, and in the same cabinet it lands at Qtc 0.694 with F3 at 58.6 Hz, a touch more damped. One cabinet serves both coils because the box is sized to the coil that asks for the larger 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 seat-side face carries a 20 degree rake that matches the lean of a factory rear seat back, so the cabinet sits flush against it and the cargo space in front stays usable. The baffle is the vertical trunk-lid-side face, so the driver fires rearward into the trunk cavity.

The trunk acts as an acoustic extension for the sealed box, and the cabin's transfer function adds real output below 50 Hz, so in-vehicle response runs deeper than the anechoic 61.4 Hz on this page.

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 and sits flush with the gloss black acrylic insert.

Anechoic F3 is 61.4 Hz for the SC102 and 58.6 Hz for the SC104, with system resonance at 61.4 and 57.5 Hz. At Qtc 0.71 the response is maximally flat into the rolloff, so F3 and fc coincide for the SC102.

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 0.60 cubic feet this cabinet was built to.

No driver. This is an enclosure only. You receive the cabinet finished in plush black carpet with the gloss black acrylic baffle insert, threaded inserts pressed to the Morel bolt pattern, stainless machine screws, one side-mounted pre-wired terminal cup 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.