Peerless 1220R02-08
Best box: 91.7 L bass reflex tuned to 44.6 Hz · F3 47.3 Hz
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Comparable 12.01" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Peerless 1220R02-08 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 91.7 Liters |
| Tuning Frequency (Fb) | 44.6 Hz |
| F3 (-3 dB Cutoff) | 47.3 Hz |
| F6 / F10 Extension | 38.6 Hz / 33.6 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 5.8 cm |
| First Pipe Resonance | 2988.0 Hz |
| Estimated MOL @ F3 | 114.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 93.7 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 74.6 Hz |
| F3 (-3 dB Cutoff) | 75.2 Hz |
| F6 / F10 Extension | 56.7 Hz / 42.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 62.0 Hz |
| Total Q (Qts) | 0.55 |
| Electrical Q (Qes) | 0.587 |
| Mechanical Q (Qms) | 8.67 |
| Equivalent Volume (Vas) | 61.1 Liters |
| Diaphragm Area (Sd) | 543.0 cm² |
| DC Resistance (Re) | 5.9 Ω |
| Efficiency Bandwidth Product (EBP) | 105.6 |
| Linear Excursion (Xmax) | 5.1 mm |
| Thermal Power (Pe) | 167.0 W |
| Nominal Diameter | 12.01" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Peerless 1220R02-08?
Load Forge's calculated alignment puts Peerless 1220R02-08 in a 91.7 liter vented enclosure tuned to 44.6 Hz, reaching an F3 cutoff of approximately 47.3 Hz.
Can Peerless 1220R02-08 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 93.7 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 75.2 Hz.
What port dimensions should be used for Peerless 1220R02-08 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 5.8 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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