SB Acoustics
SB Acoustics - 1" BAC Tweeter - SB29BAC-C000-4
SB Acoustics - 1" BAC Tweeter - SB29BAC-C000-4
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
Optimised rear chamber and vented pole piece. High output above 92 dB. Strong response well above 20kHz. Fine weave soft fabric dome for smooth frequency response. Low resonance Fs. Beryllium is incredibly rigid (seven times more rigid than Titanium or Aluminium) and is considered one of the best materials in the world for tweeter domes. Extended frequency response past 20 kHz provides exceptional airiness and spatial quality with superb transients and micro-instrumentation. The result is a subtle, detailed, dynamic tweeter with fast response but without the typical harshness of metal domes that can cause listener fatigue. With low resonance, very high output, excellent power handling and protective grille, this tweeter will work equally well for home hi-fi use or for high-end autosound applications.
Features
- Beryllium dome for non-resonant high frequency extension
- Large surround dome for increased acoustic output
- Copper cap for reduced voice coil inductance and minimum phase shift
- Saturation controlled motor system for low distortion
- Dual balanced compression chambers for improved dynamics
- Flow optimised vented pole piece for optimum coupling to rear chamber
- Non-reflective rear chamber with optimised damping for improved dynamics
- CCAW voice coil for low moving mass
- Long life flexible lead wires
- Cast aluminium faceplate
- Low resonance frequency
Specifications
Specifications
General
| Driver type | Tweeter |
|---|---|
| Nominal size | 1" |
| Nominal impedance | 4Ω |
| Power handling (RMS) | 80 W |
| Sensitivity | 92.5 dB |
Thiele/Small parameters
| Resonant frequency (Fs) | 650 Hz |
|---|---|
| DC resistance (Re) | 3 Ω |
| Voice coil inductance (Le) | 0.05 mH |
| Mechanical Q (Qms) | 2.71 |
| Electrical Q (Qes) | 1.22 |
| Total Q (Qts) | 0.84 |
| Compliance (Cms) | 0.1303 mm/N |
| Moving mass (Mms) | 0.46 g |
| Mechanical resistance (Rms) | 0.6932 kg/s |
| Force factor (Bl) | 2.4 T·m |
| Effective piston area (Sd) | 9.6 cm² |
| Linear excursion (Xmax, one-way) | 0.25 mm |
| Displacement volume (Vd) | 0.24 cm³ |
| Efficiency bandwidth product (EBP) | 532.8 |
Motor
| Voice coil height | 2 mm |
|---|---|
| Air gap height | 2.5 mm |
| Magnetic flux density | 1.1 T |
| Magnet weight | 0.22 kg |
Mounting
| Overall diameter | 103.8 mm |
|---|---|
| Cutout diameter (suggested) | ≈ 71.0 mm |
| Mounting depth | 33.23 mm |
| Flange thickness | 4 mm |
| Bolt circle diameter | 93 mm |
| Mounting holes | 4 |
| Mounting hole diameter | 4.2 mm |
| Voice coil diameter | 29 mm |
| Weight | 0.5 kg |
Materials
| Cone | Beryllium |
|---|
- Xmax is quoted one-way (peak), not peak-to-peak.
- Sensitivity measured at 2.83V/1m.
Downloads
- SB29BAC-C000-4 Datasheet
- SB29BAC-C000-4 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
