Peerless P830845
Best box: 91.9 L sealed · Fc 41.0 Hz · F3 35.2 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Peerless P830845 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- Xmax is not published, so the port size is an empirical estimate (area ≥ 12 in² per ft³ of net volume, minimum by driver size), not a displacement calculation. Check air velocity in Load Forge Studio.
- Straight vent would be 197.4 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.
Textbook Bass Reflex — not recommended
PORT NOT BUILDABLE| Net Box Volume (Vb) | 73.5 Liters |
| Tuning Frequency (Fb) | 24.6 Hz |
| F3 (-3 dB Cutoff) | 34.8 Hz |
| F6 / F10 Extension | 28.4 Hz / 21.7 Hz |
| Port Inner Diameter ESTIMATED | Ø 20.0 cm |
| Port Physical Length | 197.4 cm |
| First Pipe Resonance | 87.0 Hz |
| Estimated MOL @ F3 | 108.8 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.65 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.919; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 91.9 Liters |
| System Q (Qtc) | 0.919 (above Butterworth) |
| System Resonance (Fc) | 41.0 Hz |
| F3 (-3 dB Cutoff) | 35.2 Hz |
| F6 / F10 Extension | 28.5 Hz / 22.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 29.0 Hz |
| Total Q (Qts) | 0.65 |
| Electrical Q (Qes) | 0.686 |
| Mechanical Q (Qms) | 12.5 |
| Equivalent Volume (Vas) | 91.9 Liters |
| Diaphragm Area (Sd) | 530.0 cm² |
| DC Resistance (Re) | 5.8 Ω |
| Efficiency Bandwidth Product (EBP) | 42.3 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 175.0 W |
| Nominal Diameter | 12.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Peerless P830845?
A simple ported box is not recommended for Peerless P830845: the textbook alignment (73.5 liters tuned to 24.6 Hz) needs a 197.4 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can Peerless P830845 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 91.9 liters with a Qtc of 0.919 (above Butterworth), the system exhibits an F3 of 35.2 Hz.
What port dimensions should be used for Peerless P830845 to avoid port chuffing?
A straight 20.0 cm port would need 197.4 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
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