GAS Audio Power CMP S3-33D1
Best box: 795.0 L bass reflex tuned to 18.2 Hz · F3 19.4 Hz
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Comparable 33.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the GAS Audio Power CMP S3-33D1 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
- The textbook alignment (795.0 L at 17.3 Hz) would need a 100.6 cm port; the recommendation is retuned to 795.0 L at 18.2 Hz so the port can be built.
- Port length (93.6 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
- Large enclosure volume (795.0 L) requires extensive internal matrix bracing to prevent panel resonance.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 795.0 Liters |
| Tuning Frequency (Fb) | 18.2 Hz |
| F3 (-3 dB Cutoff) | 19.4 Hz |
| F6 / F10 Extension | 15.7 Hz / 13.7 Hz |
| Port Inner Diameter | Ø 36.6 cm |
| Port Physical Length | 93.6 cm |
| First Pipe Resonance | 184.0 Hz |
| Estimated MOL @ F3 | 130.3 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 812.4 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 29.9 Hz |
| F3 (-3 dB Cutoff) | 28.6 Hz |
| F6 / F10 Extension | 22.1 Hz / 16.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 24.0 Hz |
| Total Q (Qts) | 0.55 |
| Electrical Q (Qes) | 0.616 |
| Mechanical Q (Qms) | 5.11 |
| Equivalent Volume (Vas) | 530.0 Liters |
| Diaphragm Area (Sd) | 3957.0 cm² |
| DC Resistance (Re) | 2.2 Ω |
| Efficiency Bandwidth Product (EBP) | 38.9 |
| Linear Excursion (Xmax) | 40.0 mm |
| Thermal Power (Pe) | 11000.0 W |
| Nominal Diameter | 33.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for GAS Audio Power CMP S3-33D1?
Load Forge's calculated alignment puts GAS Audio Power CMP S3-33D1 in a 795.0 liter vented enclosure tuned to 18.2 Hz, reaching an F3 cutoff of approximately 19.4 Hz.
Can GAS Audio Power CMP S3-33D1 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 812.4 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 28.6 Hz.
What port dimensions should be used for GAS Audio Power CMP S3-33D1 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 36.6 cm with a length of 93.6 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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