← Back to Peerless - 5¼" HDS Mid-Woofer - P830860
Where the figures for 830860 come from
I take every figure from Peerless' own product page or datasheet where I can. This lists where each figure on the 830860 page came from.
- 29 from Peerless' product page
- 1 from Peerless' datasheet
- 3 worked out from Peerless' figures
- 2 not yet checked
- 4 from NB Audio's listing
General
| Driver type | Mid-Woofer | NB Audio's listing |
|---|---|---|
| Nominal size | 5.25" | 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 | 86.5 dB | Maker's product page |
| Suggested alignment | Either | NB Audio's listing |
Thiele/Small parameters
| Resonant frequency (Fs) | 72 Hz | Maker's product page |
|---|---|---|
| DC resistance (Re) | 6 Ω | Maker's product page |
| Minimum impedance (Zmin) | 6.4 Ω | Maker's product page |
| Voice coil inductance (Le) | 0.278 mH | Maker's product page |
| Mechanical Q (Qms) | 2.08 | Maker's product page |
| Electrical Q (Qes) | 0.725 | Maker's product page |
| Total Q (Qts) | 0.54 | Maker's product page |
| Equivalent volume (Vas) | 6.12 L | Maker's product page |
| Compliance (Cms) | 0.56 mm/N | Maker's product page |
| Moving mass (Mms) | 8.88 g | Maker's product page |
| Mechanical resistance (Rms) | 1.931 kg/s | Worked out from the maker's figures |
| Force factor (Bl) | 5.74 T·m | Maker's product page |
| Effective piston area (Sd) | 88.3 cm² | Maker's product page |
| Linear excursion (Xmax, one-way) | 5.5 mm | Maker's product page |
| Mechanical excursion (Xmech) | 7.65 mm | Maker's product page |
| Displacement volume (Vd) | 48.56 cm³ | Worked out from the maker's figures |
| Efficiency bandwidth product (EBP) | 99.31 | Worked out from the maker's figures |
Motor
| Motor efficiency factor (β) | 5.51 (T·m)²/Ω | Maker's product page |
|---|---|---|
| Air gap height | 6 mm | Maker's product page |
| Voice coil winding height | 13 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) | 90 × 36 × 15 mm | Maker's product page |
Mounting
| Overall diameter | 140 mm | My earlier listing, not yet checked |
|---|---|---|
| Cutout diameter | 115 mm | My earlier listing, not yet checked |
| Mounting depth | 61.3 mm | Maker's datasheet |
| Voice coil diameter | 25.7 mm | Maker's product page |
| Weight | 1.06 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: Bolt circle, 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 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