Visaton BF 37 - 4 Ohm
Best box: 0.06 L sealed · Fc 219.2 Hz · F3 184.4 Hz
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Comparable 1.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Visaton BF 37 - 4 Ohm 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: 3.4 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (5.7 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 131.8 Hz |
| F3 (-3 dB Cutoff) | 123.9 Hz |
| F6 / F10 Extension | 118.9 Hz / 112.3 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 19.0 cm |
| First Pipe Resonance | 905.0 Hz |
| Estimated MOL @ F3 | 91.2 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.74 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.047; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.06 Liters |
| System Q (Qtc) | 1.047 (above Butterworth: Qtc cannot fall below Qts (0.74)) |
| System Resonance (Fc) | 219.2 Hz |
| F3 (-3 dB Cutoff) | 184.4 Hz |
| F6 / F10 Extension | 152.4 Hz / 122.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 155.0 Hz |
| Total Q (Qts) | 0.74 |
| Electrical Q (Qes) | 0.865 |
| Mechanical Q (Qms) | 5.11 |
| Equivalent Volume (Vas) | 0.1 Liters |
| Diaphragm Area (Sd) | 6.2 cm² |
| DC Resistance (Re) | 3.8 Ω |
| Efficiency Bandwidth Product (EBP) | 179.1 |
| Linear Excursion (Xmax) | 3.4 mm |
| Thermal Power (Pe) | 5.0 W |
| Nominal Diameter | 1.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Visaton BF 37 - 4 Ohm?
A simple ported box is not recommended for Visaton BF 37 - 4 Ohm: the textbook alignment (1.5 liters tuned to 131.8 Hz) needs a 19.0 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 Visaton BF 37 - 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.06 liters with a Qtc of 1.047 (above Butterworth: Qtc cannot fall below Qts (0.74)), the system exhibits an F3 of 184.4 Hz.
What port dimensions should be used for Visaton BF 37 - 4 Ohm to avoid port chuffing?
A straight 5.0 cm port would need 19.0 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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