What is the recommended ported (bass reflex) box volume for Beyma LOUDSPEAKER 6"MCF200Nd 8 OH?

According to electroacoustic alignment calculations, Beyma LOUDSPEAKER 6"MCF200Nd 8 OH performs optimally in a 1.5 liter vented enclosure tuned to 345.1 Hz, reaching an F3 cutoff of approximately 181.6 Hz.

Can Beyma LOUDSPEAKER 6"MCF200Nd 8 OH be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 1.1 liters with a Qtc of 0.805, the system exhibits an F3 of 145.2 Hz with tight transient response and natural roll-off.

What port dimensions should be used for Beyma LOUDSPEAKER 6"MCF200Nd 8 OH to avoid port chuffing?

To keep vent air velocity below turbulence limits at rated power, a minimum port diameter of 7.5 cm with a length of 2.1 cm is recommended.

Reflex Optimized

Beyma LOUDSPEAKER 6"MCF200Nd 8 OH

Complete Thiele/Small parameters, optimized ported (bass reflex) and sealed enclosure designs, F3/F6/F10 cutoffs, and vent turbulence analysis calculated by Load Forge.

Estimated Retail

292.57 GBP

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⚠️ Engineering Notice for Builders

Limited linear excursion (Xmax: 2.5 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.

Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	1.5 Liters
Tuning Frequency (Fb)	345.1 Hz
F3 (-3 dB Cutoff)	181.6 Hz
F6 / F10 Extension	164.4 Hz / 143.2 Hz
Port Inner Diameter	Ø 7.5 cm
Port Physical Length	2.1 cm
First Pipe Resonance	8389.0 Hz
Estimated MOL @ F3	99.5 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	1.1 Liters
System Q (Qtc)	0.805 (Butterworth Q=0.707)
System Resonance (Fc)	441.7 Hz
F3 (-3 dB Cutoff)	145.2 Hz
F6 / F10 Extension	109.7 Hz / 78.8 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	406.0 Hz
Total Q (Qts)	0.72
Electrical Q (Qes)	0.774
Mechanical Q (Qms)	10.3

Equivalent Volume (Vas)	0.3 Liters
Diaphragm Area (Sd)	140.0 cm²
DC Resistance (Re)	6.2 Ω
Efficiency Bandwidth Product (EBP)	524.5

Linear Excursion (Xmax)	2.5 mm
Thermal Power (Pe)	200.0 W
Nominal Diameter	6.0"
Catalog Source	Manufacturer Official Datasheet

Shareable Acoustic Card for Forums & Social Media

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Beyma LOUDSPEAKER 6"MCF200Nd 8 OH Enclosure Card

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[url=https://loadforge.io/drivers/beyma-loudspeaker-6inmcf200nd-8-oh][img]https://loadforge.io/api/v1/card/beyma-loudspeaker-6inmcf200nd-8-oh.svg[/img][/url]
[b]Beyma LOUDSPEAKER 6"MCF200Nd 8 OH[/b] — 1.5L Bass Reflex tuned to 345.1Hz (F3: 181.6Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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