Unknown DX25TG59-04
Best box: 0.013 L sealed · Fc 834.4 Hz · F3 873.4 Hz
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Comparable 1.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Unknown DX25TG59-04 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: 0.883 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (12.2 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 479.7 Hz |
| F3 (-3 dB Cutoff) | 455.2 Hz |
| F6 / F10 Extension | 438.6 Hz / 415.8 Hz |
| Port Inner Diameter | Ø 15.0 cm |
| Port Physical Length | 4.6 cm |
| First Pipe Resonance | 3722.0 Hz |
| Estimated MOL @ F3 | 106.0 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.48 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.679; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.013 Liters |
| System Q (Qtc) | 0.679 (Butterworth) |
| System Resonance (Fc) | 834.4 Hz |
| F3 (-3 dB Cutoff) | 873.4 Hz |
| F6 / F10 Extension | 648.2 Hz / 483.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 590.0 Hz |
| Total Q (Qts) | 0.48 |
| Electrical Q (Qes) | 0.617 |
| Mechanical Q (Qms) | 2.16 |
| Equivalent Volume (Vas) | 0.0 Liters |
| Diaphragm Area (Sd) | 6.6 cm² |
| DC Resistance (Re) | 3.0 Ω |
| Efficiency Bandwidth Product (EBP) | 956.0 |
| Linear Excursion (Xmax) | 0.9 mm |
| Thermal Power (Pe) | 15.0 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 Unknown DX25TG59-04?
A simple ported box is not recommended for Unknown DX25TG59-04: the textbook alignment (1.5 liters tuned to 479.7 Hz) needs a 4.6 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 Unknown DX25TG59-04 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.013 liters with a Qtc of 0.679 (Butterworth), the system exhibits an F3 of 873.4 Hz.
What port dimensions should be used for Unknown DX25TG59-04 to avoid port chuffing?
A straight 15.0 cm port would need 4.6 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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