Visaton FR 58 - 8
Best box: 0.18 L sealed · Fc 268.7 Hz · F3 222.1 Hz
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Comparable 2.3" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Visaton FR 58 - 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: 0.55 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (4.9 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 161.5 Hz |
| F3 (-3 dB Cutoff) | 146.8 Hz |
| F6 / F10 Extension | 138.9 Hz / 129.8 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 11.5 cm |
| First Pipe Resonance | 1500.0 Hz |
| Estimated MOL @ F3 | 87.3 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.98 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.386; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.18 Liters |
| System Q (Qtc) | 1.386 (above Butterworth: Qtc cannot fall below Qts (0.98)) |
| System Resonance (Fc) | 268.7 Hz |
| F3 (-3 dB Cutoff) | 222.1 Hz |
| F6 / F10 Extension | 190.2 Hz / 157.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 190.0 Hz |
| Total Q (Qts) | 0.98 |
| Electrical Q (Qes) | 1.652 |
| Mechanical Q (Qms) | 2.41 |
| Equivalent Volume (Vas) | 0.2 Liters |
| Diaphragm Area (Sd) | 13.2 cm² |
| DC Resistance (Re) | 7.3 Ω |
| Efficiency Bandwidth Product (EBP) | 115.0 |
| Linear Excursion (Xmax) | 0.6 mm |
| Thermal Power (Pe) | 10.0 W |
| Nominal Diameter | 2.3" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Visaton FR 58 - 8?
A simple ported box is not recommended for Visaton FR 58 - 8: the textbook alignment (1.5 liters tuned to 161.5 Hz) needs a 11.5 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 FR 58 - 8 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.18 liters with a Qtc of 1.386 (above Butterworth: Qtc cannot fall below Qts (0.98)), the system exhibits an F3 of 222.1 Hz.
What port dimensions should be used for Visaton FR 58 - 8 to avoid port chuffing?
A straight 5.0 cm port would need 11.5 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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