LaVoce MSF061.50-8
Best box: 0.28 L sealed · Fc 743.9 Hz · F3 633.7 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the LaVoce MSF061.50-8 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: 2.0 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (13.8 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 447.1 Hz |
| F3 (-3 dB Cutoff) | 480.7 Hz |
| F6 / F10 Extension | 374.1 Hz / 349.3 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 3.3 cm |
| First Pipe Resonance | 5165.0 Hz |
| Estimated MOL @ F3 | 124.2 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 2.3 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 3.253; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.28 Liters |
| System Q (Qtc) | 3.253 (above Butterworth: Qtc cannot fall below Qts (2.30)) |
| System Resonance (Fc) | 743.9 Hz |
| F3 (-3 dB Cutoff) | 633.7 Hz |
| F6 / F10 Extension | 580.4 Hz / 512.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 526.0 Hz |
| Total Q (Qts) | 2.3 |
| Electrical Q (Qes) | 2.692 |
| Mechanical Q (Qms) | 15.8 |
| Equivalent Volume (Vas) | 0.3 Liters |
| Diaphragm Area (Sd) | 143.0 cm² |
| DC Resistance (Re) | 5.9 Ω |
| Efficiency Bandwidth Product (EBP) | 195.4 |
| Linear Excursion (Xmax) | 2.0 mm |
| Thermal Power (Pe) | 100.0 W |
| Nominal Diameter | 6.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for LaVoce MSF061.50-8?
A simple ported box is not recommended for LaVoce MSF061.50-8: the textbook alignment (1.5 liters tuned to 447.1 Hz) needs a 3.3 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 LaVoce MSF061.50-8 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.28 liters with a Qtc of 3.253 (above Butterworth: Qtc cannot fall below Qts (2.30)), the system exhibits an F3 of 633.7 Hz.
What port dimensions should be used for LaVoce MSF061.50-8 to avoid port chuffing?
A straight 12.5 cm port would need 3.3 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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