Peerless GBS-135F25AL02-04 5-1/4" Aluminum Cone Woofer 4 Ohm
Best box: 8.0 L bass reflex tuned to 44.1 Hz · F3 55.7 Hz
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Comparable 5.25" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Peerless GBS-135F25AL02-04 5-1/4" Aluminum Cone Woofer 4 Ohm 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
- Limited linear excursion (Xmax: 3.3 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 8.0 Liters |
| Tuning Frequency (Fb) | 44.1 Hz |
| F3 (-3 dB Cutoff) | 55.7 Hz |
| F6 / F10 Extension | 39.9 Hz / 33.8 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 34.3 cm |
| First Pipe Resonance | 502.0 Hz |
| Estimated MOL @ F3 | 97.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 9.9 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 76.9 Hz |
| F3 (-3 dB Cutoff) | 77.8 Hz |
| F6 / F10 Extension | 58.8 Hz / 44.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 63.0 Hz |
| Total Q (Qts) | 0.57 |
| Electrical Q (Qes) | 0.662 |
| Mechanical Q (Qms) | 4.12 |
| Equivalent Volume (Vas) | 5.4 Liters |
| Diaphragm Area (Sd) | 85.2 cm² |
| DC Resistance (Re) | 3.28 Ω |
| Efficiency Bandwidth Product (EBP) | 95.2 |
| Linear Excursion (Xmax) | 3.3 mm |
| Thermal Power (Pe) | 35.0 W |
| Nominal Diameter | 5.25" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Peerless GBS-135F25AL02-04 5-1/4" Aluminum Cone Woofer 4 Ohm?
Load Forge's calculated alignment puts Peerless GBS-135F25AL02-04 5-1/4" Aluminum Cone Woofer 4 Ohm in a 8.0 liter vented enclosure tuned to 44.1 Hz, reaching an F3 cutoff of approximately 55.7 Hz.
Can Peerless GBS-135F25AL02-04 5-1/4" Aluminum Cone Woofer 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 9.9 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 77.8 Hz.
What port dimensions should be used for Peerless GBS-135F25AL02-04 5-1/4" Aluminum Cone Woofer 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 34.3 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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