Custom Builds · Datasheet
2018 Honda Civic Quad 12 Sealed Quad 12" Sealed enclosure
- Net volume
- 0.60 cu ft per chamber, 2.41 total, after the posts and 0.042 cu ft driver displacement
- Cutout
- 11.125 in x4 at 8.688 / 25.312 in across, 7.188 / 20.812 in back
- External dimensions
- 34.00" W x 28.00" D x 7.81" H
SKU CB 12Q-S CIVIC18 Dealers: paste this SKU into the order form.
- Best For: 2018 Honda Civic, four Wavtech thinPRO 12s
- Net Volume: 0.60 cu ft per chamber (2.41 total)
- Driver Match: Four Wavtech thinPRO 12
- Construction: Custom Build | Woofers Up | Four Sealed Chambers | Double 1.5" Top, Gloss Black Acrylic Overlay | 8 Posts | Right-Side Terminal Cup | No Carpet
Spec of record
Technical specifications
| Specification | Value |
|---|---|
| Build Type | Custom Build Series: 2018 Honda Civic |
| Compatible Driver | Wavtech thinPRO 12, quantity 4 |
| External Dimensions | 34.00" W x 28.00" D x 7.81" H |
| Mounting | Woofers up, surface mount on a double 1.5 in top, no recess |
| Internal Volume, Net | 0.60 cu ft per chamber, 2.41 total, after the posts and 0.042 cu ft driver displacement |
| Alignment per chamber | Qtc 0.856, fc 48.4 Hz, F3 41.4 Hz anechoic |
| Wavtech Recommended | 0.4 to 1.0 cu ft sealed, 0.6 optimum |
| Cutouts | 11.125 in x4 at 8.688 / 25.312 in across, 7.188 / 20.812 in back |
| Motor Clearance | 4.06 in below the 3.0 in mounting depth |
| Bracing | Divider grid plus two 3 x 0.75 in MDF posts per chamber, 8 total |
| Sides | Flush, no inset side panels |
| Terminal Cup | One, right side (28 in side), 7 in from the front edge |
| Driver Mounting | Threaded insert kit included; Wavtech publishes no bolt circle |
| Material | Langboard Elite MDF, rabbet and dado joinery |
| Top Finish | Gloss black acrylic overlay |
| Carpet | None: bare MDF for custom trim panels |
| Shipping Weight | 70 lb |
| Warranty | 1 Year Limited |
| Built In | Tullahoma, Tennessee |
Modelled response
Performance in this enclosure
01Is it a sealed driver?
Efficiency bandwidth product places the motor before anything else is decided.
02What the box does to it
0.60 cu ft against a 42.0 L Vas.
03The watts that reach Xmax (in this enclosure)
Travel scales with the square root of power, so there is one wattage that puts the cone exactly on 20.0 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.
| Param | Value | Unit | Note |
|---|---|---|---|
| Fs | 26.00 | Hz | free-air resonance |
| Qts | 0.460 | 4 ohm | |
| Vas | 42.00 | L | equivalent compliance |
| Sd | 510.7 | cm² | effective piston area |
| Xmax | 20 | mm | one-way linear travel |
| Pe | 750 | W | continuous RMS |
| SPL | 83.5 | dB | 1 W / 1 m, derived from T/S |
Driver parameters as published by Wavtech published specifications. Curves computed against this enclosure’s actual net airspace.
From the shop floor
Installer's take
Built to the car and the woofers: 34 by 28 on the floor, and the height is whatever 0.6 cubic feet per chamber needs, 7.81 inches.
That is Wavtech's own optimum for the thinPRO 12 sealed, Qtc 0.86, F3 41.4 Hz. Four chambers, so no woofer shares air with another.
Woofers up through a double top with no recess, flush edges, a divider grid and corner posts holding a 5.56 inch cavity together.
One terminal cup on the right side, eight posts inside, no carpet: the top gets the gloss black acrylic, the rest stays bare for the custom trim panels. Inserts ship in the kit.
Before you order
Questions
Will this fit a 2018 Honda Civic?
It was built for one: 34 inches wide, 28 deep and 7.81 tall. Measure your own trunk floor before ordering; trims and aftermarket panels vary.
Why 0.6 cubic feet per chamber?
It is Wavtech's own sealed optimum for the thinPRO 12. On Wavtech's figures it reads Qtc 0.856 with half power at 41.4 Hz.
What power should I run?
The thinPRO12-4 is rated 750 watts RMS; aim for 525 to 750 watts per driver.
Why do the woofers fire upward?
This custom build mounts all four on the top face so the box can stay 7.81 inches tall and use the whole 34 by 28 floor.
Why four separate chambers?
Woofers sharing one sealed volume load each other. The divider grid gives each its own 0.60 cubic feet.
What is the expected low-frequency extension?
Anechoic F3 is 41.4 Hz per chamber; cabin gain in the car adds real output below that.
Is there a terminal cup?
Yes, one, on the right side (a 28 inch side) 7 inches back from the front edge. All four woofers wire to it; the other chambers' leads pass through sealed holes in the dividers.
Are the woofers included?
No. Enclosure only; bring your own set of four Wavtech thinPRO 12s. You receive the cabinet with its gloss black acrylic top overlay, bare MDF elsewhere for your trim panels, and a threaded insert kit with screws.
Same series, same size
2018 Honda Civic Dual 12 Sealed
Sundown Audio SA-12