SB Acoustics
SB Acoustics - 12" SWPL Subwoofer - SB34SWPL76-4
SB Acoustics - 12" SWPL Subwoofer - SB34SWPL76-4
Regular price
$394.95
Regular price
Sale price
$394.95
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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
Large vented motor system and vented coil former.
Features
- Long stroke design
- Linear high stability suspension
- Low damping rubber surround
- 3″ copper voice coil
- Non-conducting reinforced fibre glass coil former
- Very stiff hard paper cone (made in-house)
- Vented cast aluminium chassis
- Large vented motor system and vented coilformer
- Long life silver lead wires
Specifications
Specifications
General
| Driver type | Subwoofer |
|---|---|
| Nominal size | 12" |
| Nominal impedance | 4Ω |
| Series | Long Stroke |
| Power handling (RMS) | 300 W |
| Sensitivity | 85 dB |
| Suggested alignment | Either |
Thiele/Small parameters
| Resonant frequency (Fs) | 19 Hz |
|---|---|
| DC resistance (Re) | 3.5 Ω |
| Voice coil inductance (Le) | 5.3 mH |
| Mechanical Q (Qms) | 7.7 |
| Electrical Q (Qes) | 0.33 |
| Total Q (Qts) | 0.32 |
| Equivalent volume (Vas) | 78.5 L |
| Compliance (Cms) | 0.27 mm/N |
| Moving mass (Mms) | 266 g |
| Mechanical resistance (Rms) | 4.1 kg/s |
| Force factor (Bl) | 18.3 T·m |
| Effective piston area (Sd) | 458 cm² |
| Linear excursion (Xmax, one-way) | 15 mm |
| Displacement volume (Vd) | 687 cm³ |
| Efficiency bandwidth product (EBP) | 57.58 |
Motor
| Voice coil height | 38 mm |
|---|---|
| Air gap height | 8 mm |
| Magnetic flux density | 0.62 T |
| Magnet weight | 2.4 kg |
Mounting
| Overall diameter | 346.2 mm |
|---|---|
| Cutout diameter (suggested) | ≈ 306.7 mm |
| Mounting depth | 146.5 mm |
| Flange thickness | 10 mm |
| Bolt circle diameter | 324.2 mm |
| Mounting holes | 8 |
| Mounting hole diameter | 5.5 mm |
| Voice coil diameter | 76 mm |
| Weight | 7.68 kg |
Materials
| Cone | Paper |
|---|---|
| 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
- 12″ SB34SWPL76-4 Datasheet
- SB34SWPL76-4 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
