Unknown DA25BG08-06
Best box: 0.012 L sealed · Fc 1004.1 Hz · F3 999.9 Hz
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Comparable 1.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Unknown DA25BG08-06 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: 1.13 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (12.1 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 546.6 Hz |
| F3 (-3 dB Cutoff) | 518.9 Hz |
| F6 / F10 Extension | 500.1 Hz / 474.5 Hz |
| Port Inner Diameter | Ø 20.0 cm |
| Port Physical Length | 6.7 cm |
| First Pipe Resonance | 2562.0 Hz |
| Estimated MOL @ F3 | 104.1 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.51 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.721; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.012 Liters |
| System Q (Qtc) | 0.721 (Butterworth) |
| System Resonance (Fc) | 1004.1 Hz |
| F3 (-3 dB Cutoff) | 999.9 Hz |
| F6 / F10 Extension | 752.7 Hz / 567.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 710.0 Hz |
| Total Q (Qts) | 0.51 |
| Electrical Q (Qes) | 0.715 |
| Mechanical Q (Qms) | 1.78 |
| Equivalent Volume (Vas) | 0.0 Liters |
| Diaphragm Area (Sd) | 6.6 cm² |
| DC Resistance (Re) | 5.2 Ω |
| Efficiency Bandwidth Product (EBP) | 993.3 |
| Linear Excursion (Xmax) | 1.1 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 DA25BG08-06?
A simple ported box is not recommended for Unknown DA25BG08-06: the textbook alignment (1.5 liters tuned to 546.6 Hz) needs a 6.7 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 DA25BG08-06 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.012 liters with a Qtc of 0.721 (Butterworth), the system exhibits an F3 of 999.9 Hz.
What port dimensions should be used for Unknown DA25BG08-06 to avoid port chuffing?
A straight 20.0 cm port would need 6.7 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
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