← Back to Peerless - 6½" HDS Mid-Woofer - P830883
Where the figures for 830883 come from
I take every figure from Peerless' own product page or datasheet where I can. This lists where each figure on the 830883 page came from.
- 29 from Peerless' product page
- 5 from Peerless' datasheet
- 3 worked out from Peerless' figures
- 1 my estimate
- 1 not yet checked
- 4 from NB Audio's listing
General
| Driver type | Mid-Woofer | NB Audio's listing |
|---|---|---|
| Nominal size | 6.5" | NB Audio's listing |
| Nominal impedance | 8Ω | Maker's product page |
| Series | Peerless Woofer | NB Audio's listing |
| Power handling (RMS) | 30 W | Maker's product page |
| Sensitivity | 87.2 dB | Maker's product page |
| Suggested alignment | Either | NB Audio's listing |
Thiele/Small parameters
| Resonant frequency (Fs) | 68 Hz | Maker's product page |
|---|---|---|
| DC resistance (Re) | 5.9 Ω | Maker's product page |
| Minimum impedance (Zmin) | 6.6 Ω | Maker's product page |
| Voice coil inductance (Le) | 0.215 mH | Maker's product page |
| Mechanical Q (Qms) | 2.18 | Maker's product page |
| Electrical Q (Qes) | 0.971 | Maker's product page |
| Total Q (Qts) | 0.67 | Maker's product page |
| Equivalent volume (Vas) | 6.81 L | Maker's product page |
| Compliance (Cms) | 0.24 mm/N | Maker's product page |
| Moving mass (Mms) | 23.7 g | Maker's product page |
| Mechanical resistance (Rms) | 4.645 kg/s | Worked out from the maker's figures |
| Force factor (Bl) | 7.8 T·m | Maker's product page |
| Effective piston area (Sd) | 143 cm² | Maker's product page |
| Linear excursion (Xmax, one-way) | 7.62 mm | Maker's product page |
| Mechanical excursion (Xmech) | 10 mm | Maker's product page |
| Displacement volume (Vd) | 109 cm³ | Worked out from the maker's figures |
| Efficiency bandwidth product (EBP) | 70.03 | Worked out from the maker's figures |
Motor
| Motor efficiency factor (β) | 10.3 (T·m)²/Ω | Maker's product page |
|---|---|---|
| Air gap height | 6 mm | Maker's product page |
| Voice coil winding height | 17.2 mm | Maker's product page |
| Voice coil layers | 2 | Maker's product page |
| Voice coil wire | CCAW | Maker's product page |
| Magnet size (OD × ID × thickness) | 102 × 43 × 20 mm | Maker's product page |
| Magnet weight | 0.4 kg | My earlier listing, not yet checked |
Mounting
| Overall diameter | 180 mm | Maker's datasheet |
|---|---|---|
| Cutout diameter (suggested) | ≈ 147.0 mm | My estimate, from the maker's drawing |
| Mounting depth | 78 mm | Maker's datasheet |
| Bolt circle diameter | 167.3 mm | Maker's datasheet |
| Mounting holes | 6 | Maker's datasheet |
| Mounting hole diameter | 5 mm | Maker's datasheet |
| Voice coil diameter | 32.4 mm | Maker's product page |
| Weight | 1.65 kg | Maker's product page |
Materials
| Cone | Coated Paper | Maker's product page |
|---|---|---|
| Surround | NBR | Maker's product page |
| Basket | Cast Aluminium | Maker's product page |
| Magnet | Ferrite | Maker's product page |
Not on file: Flange thickness. Either the maker doesn't publish it or I haven't found it yet.
What the labels mean
- Maker's product page: copied from the maker's product page.
- Maker's datasheet: read off the maker's own datasheet or drawing.
- Worked out from the maker's figures: Vd = Sd × Xmax, EBP = Fs ÷ Qes.
- My estimate, from the maker's drawing: measured off the maker's drawing, usually within ±0.3 mm (up to ±0.5). The suggested cutout is the basket's width on the drawing plus 1 mm of clearance (1.5 mm on drivers over 200 mm). Measure before you cut.
- My earlier listing, not yet checked: from the listing I had before I started checking figures against makers. Treat it as a guide until it's checked.
- NB Audio's listing: how I've filed it in the store.
Check them yourself: Spec Sheet