SB Acoustics
SB Acoustics - 8" MFCL Subwoofer - SB23MFCL45-4
SB Acoustics - 8" MFCL Subwoofer - SB23MFCL45-4
Regular price
$244.95
Regular price
Sale price
$244.95
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In stock
Stock status is updated regularly from my distributor. If the full quantity ordered isn’t available, I’ll get in touch.
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Description
Vented cast aluminium chassis for optimum strength and low compression. Unique mineral filled polypropylene cone material, made in-house with extra stiffness. Extended roll rubber surround for improved transient response and SPL. Vented pole piece and aluminium chassis.
Features
- Long stroke design
- Linear high stability suspension
- Low damping rubber surround
- Long copper voice coil
- Non-conducting reinforced fibre glass coil former
- Very stiff mineral filled Polypropylene cone
- Vented cast aluminium chassis
- Large vented motor system
- Long life silver lead wires
- Optimised for smaller enclosures
Specifications
Specifications
General
| Driver type | Subwoofer |
|---|---|
| Nominal size | 8" |
| Nominal impedance | 4Ω |
| Series | Poly Cone |
| Power handling (RMS) | 150 W |
| Sensitivity | 87.5 dB |
| Suggested alignment | Either |
Thiele/Small parameters
| Resonant frequency (Fs) | 27 Hz |
|---|---|
| DC resistance (Re) | 3.3 Ω |
| Voice coil inductance (Le) | 0.73 mH |
| Mechanical Q (Qms) | 7.7 |
| Electrical Q (Qes) | 0.36 |
| Total Q (Qts) | 0.34 |
| Equivalent volume (Vas) | 37 L |
| Compliance (Cms) | 0.59 mm/N |
| Moving mass (Mms) | 59 g |
| Mechanical resistance (Rms) | 1.3 kg/s |
| Force factor (Bl) | 9.6 T·m |
| Effective piston area (Sd) | 210 cm² |
| Linear excursion (Xmax, one-way) | 12 mm |
| Displacement volume (Vd) | 252 cm³ |
| Efficiency bandwidth product (EBP) | 75 |
Motor
| Voice coil height | 32 mm |
|---|---|
| Air gap height | 8 mm |
| Magnetic flux density | 1.03 T |
| Magnet weight | 2 kg |
Mounting
| Overall diameter | 234.2 mm |
|---|---|
| Cutout diameter (suggested) | ≈ 204.5 mm |
| Mounting depth | 122.1 mm |
| Flange thickness | 8.5 mm |
| Bolt circle diameter | 219 mm |
| Mounting holes | 8 |
| Mounting hole diameter | 4.3 mm |
| Voice coil diameter | 45.5 mm |
| Weight | 4.7 kg |
Materials
| Cone | Polypropylene |
|---|---|
| Surround | Rubber |
| Voice coil former | Fibreglass |
| Basket | Cast Aluminium |
- Xmax is quoted one-way (peak), not peak-to-peak.
- Sensitivity measured at 2.83V/1m.
Downloads
- 8″ SB23MFCL45-4 Datasheet
- SB23MFCL45-4 Cutout & Recess Template (NB Audio) Straight off SB Acoustics' spec sheet: flange outline, recess depth, bolt holes. Scaled from SB Acoustics' drawing, so close but not guaranteed exact: cutout. Check it against your driver before you cut.
Where do these figures come from? See the source of each one
