SB Acoustics
SB Acoustics - 4" PFC Coaxial - SB12PFC25-4-COAX
SB Acoustics - 4" PFC Coaxial - SB12PFC25-4-COAX
Regular price
$78.95
Regular price
Sale price
$78.95
Unit price
per
Tax included.
Shipping calculated at checkout.
In stock
Stock status is updated regularly from my distributor. If the full quantity ordered isn’t available, I’ll get in touch.
Couldn't load pickup availability
Description
Compact large surround dome tweeter built into the mid-woofer pole. Requires crossover.
Features
- Vented reinforced plastic chassis
- Proprietary cone material with natural fibres made in-house
- Soft low damping rubber surround for improved transient response
- Optimised motor system
- Non-resonant long life lead wires
- Compact large surround dome tweeter
Specifications
Specifications
General
| Driver type | Coaxial |
|---|---|
| Nominal size | 4" |
| Nominal impedance | 4Ω |
| Power handling (RMS) | 30 W |
| Sensitivity | 87 dB |
| Suggested alignment | Ported |
| Recommended crossover | ~2200Hz 18dB/Oct |
Thiele/Small parameters
| Resonant frequency (Fs) | 58 Hz |
|---|---|
| DC resistance (Re) | 3.1 Ω |
| Voice coil inductance (Le) | 0.26 mH |
| Mechanical Q (Qms) | 4.07 |
| Electrical Q (Qes) | 0.36 |
| Total Q (Qts) | 0.33 |
| Equivalent volume (Vas) | 4.8 L |
| Compliance (Cms) | 1.66 mm/N |
| Moving mass (Mms) | 4.5 g |
| Mechanical resistance (Rms) | 0.4 kg/s |
| Force factor (Bl) | 3.8 T·m |
| Effective piston area (Sd) | 45 cm² |
| Linear excursion (Xmax, one-way) | 5 mm |
| Displacement volume (Vd) | 22.5 cm³ |
| Efficiency bandwidth product (EBP) | 161.1 |
Motor
| Voice coil height | 15 mm |
|---|---|
| Air gap height | 5 mm |
| Magnetic flux density | 1 T |
| Magnet weight | 0.4 kg |
Tweeter (coaxial)
| Nominal impedance | 4Ω |
|---|---|
| DC resistance (Re) | 3 Ω |
| Resonant frequency (Fs) | 1,300 Hz |
| Sensitivity | 89 dB |
| Power handling (RMS) | 10 W |
| Voice coil diameter | 12.4 mm |
| Voice coil height | 1.2 mm |
| Air gap height | 1.5 mm |
| Magnetic flux density | 1.05 T |
| Magnet weight | 0.003 kg |
| Weight | 0.014 kg |
Mounting
| Overall diameter | 125 mm |
|---|---|
| Faceplate | Not round (see the maker's drawing) |
| Cutout diameter (suggested) | ≈ 103.0 mm |
| Mounting depth (estimate) | ≈ 63.9 mm |
| Voice coil diameter | 25.4 mm |
| Weight | 0.86 kg |
Materials
| Cone | Paper |
|---|---|
| Surround | Rubber |
| Basket | Reinforced Plastic |
- Xmax is quoted one-way (peak), not peak-to-peak.
- Sensitivity measured at 2.83V/1m.
- On this coaxial, the Thiele/Small parameters are the woofer's; the tweeter's are listed separately.
Downloads
- 4″ SB12PFC25-4-COAX Datasheet
- SB12PFC25-4-COAX Cutout & Recess Template (NB Audio) Straight off SB Acoustics' spec sheet: flange outline, bolt holes. Scaled from SB Acoustics' drawing, so close but not guaranteed exact: cutout. Left out: recess depth not on file, so measure your flange. Check it against your driver before you cut.
Some figures here aren't checked against SB Acoustics' datasheet yet. See which
