RS Speakers TW 104.28 N/Ag
Best box: 0.05 L sealed · Fc 606.9 Hz · F3 872.0 Hz
Open and tweak this box live ↗
Will it fit your requirements?
Check the RS Speakers TW 104.28 N/Ag against your space and targets — instant, no sign-up.
Estimated retail 162.00 EUR · Check price & availability ↗
Free, no sign-up to simulate · a free account saves your design
Comparable 1.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the RS Speakers TW 104.28 N/Ag 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.
Textbook Bass Reflex — not recommended (11.5 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 509.7 Hz |
| F3 (-3 dB Cutoff) | 483.2 Hz |
| F6 / F10 Extension | 465.1 Hz / 440.0 Hz |
| Port Inner Diameter ESTIMATED | Ø 15.0 cm |
| Port Physical Length | 2.9 cm |
| First Pipe Resonance | 5998.0 Hz |
| Estimated MOL @ F3 | 110.1 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 0.05 Liters |
| System Q (Qtc) | 0.461 (below Butterworth) |
| System Resonance (Fc) | 606.9 Hz |
| F3 (-3 dB Cutoff) | 872.0 Hz |
| F6 / F10 Extension | 580.9 Hz / 394.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 520.0 Hz |
| Total Q (Qts) | 0.39 |
| Electrical Q (Qes) | 0.478 |
| Mechanical Q (Qms) | 2.12 |
| Equivalent Volume (Vas) | 0.0 Liters |
| Diaphragm Area (Sd) | 9.1 cm² |
| DC Resistance (Re) | 6.0 Ω |
| Efficiency Bandwidth Product (EBP) | 1088.1 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 25.0 W |
| Nominal Diameter | 1.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for RS Speakers TW 104.28 N/Ag?
A simple ported box is not recommended for RS Speakers TW 104.28 N/Ag: the textbook alignment (1.5 liters tuned to 509.7 Hz) needs a 2.9 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 RS Speakers TW 104.28 N/Ag be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.05 liters with a Qtc of 0.461 (below Butterworth), the system exhibits an F3 of 872.0 Hz.
What port dimensions should be used for RS Speakers TW 104.28 N/Ag to avoid port chuffing?
A straight 15.0 cm port would need 2.9 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
Not sure if TW 104.28 N/Ag fits your physical space?
Don't force a driver into the wrong box. Use Bass Match to calculate which of 8,000+ catalog drivers delivers the highest SPL, lowest F3, and cleanest port air velocity for your exact trunk or room dimensions.
Run Bass Match for Your Space