Versatile Load

B & C BAC6CXN36AA

Best box: 6.0 L bass reflex tuned to 76.5 Hz · F3 114.4 Hz

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Comparable 6.5" Drivers

Drivers with similar piston area, resonance and Qts — useful alternatives when the B & C BAC6CXN36AA does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.

B & C

BAC6XT13A

6.5" · Fs 98.0 Hz · Qts 0.6 · Vas 7.0 L

B & C

BAC6MBX44A

6.5" · Fs 90.0 Hz · Qts 0.27 · Vas 5.8 L

B & C

BAC6MBX44B

6.5" · Fs 90.0 Hz · Qts 0.27 · Vas 5.8 L

B&C Speakers

6CXN36

6.5" · Fs 90.0 Hz · Qts 0.95 · Vas 7.5 L

Hertz

PRO MPX165 3

6.5" · Fs 90.0 Hz · Qts 0.88 · Vas 4.0 L

Dayton Audio

PK165-8

6.5" · Fs 91.5 Hz · Qts 0.7 · Vas 7.7 L

Compare them in the same box → Browse all 6.5" drivers → All B & C drivers →

Recommended Bass Reflex (Vented)

PORT BUILDABLE

Net Box Volume (Vb)	6.0 Liters
Tuning Frequency (Fb)	76.5 Hz
F3 (-3 dB Cutoff)	114.4 Hz
F6 / F10 Extension	98.1 Hz / 78.2 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	13.2 cm
First Pipe Resonance	1304.0 Hz
Estimated MOL @ F3	110.6 dB SPL

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Sealed (Acoustic Suspension) — compromise

SUITS INFINITE / OPEN BAFFLE

With Qts 0.95 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.344; for a flat response this driver is better used on an infinite (IB) or open baffle.

Net Box Volume (Vb)	7.5 Liters
System Q (Qtc)	1.344 (above Butterworth: Qtc cannot fall below Qts (0.95))
System Resonance (Fc)	127.3 Hz
F3 (-3 dB Cutoff)	103.0 Hz
F6 / F10 Extension	88.0 Hz / 72.5 Hz
Air Spring Linearity	High (Zero port compression)

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Thiele/Small Parameters

Resonance (Fs)	90.0 Hz
Total Q (Qts)	0.95
Electrical Q (Qes)	1.173
Mechanical Q (Qms)	5.0

Equivalent Volume (Vas)	7.5 Liters
Diaphragm Area (Sd)	132.0 cm²
DC Resistance (Re)	5.8 Ω
Efficiency Bandwidth Product (EBP)	76.7

Linear Excursion (Xmax)	4.1 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 B & C BAC6CXN36AA?

Load Forge's calculated alignment puts B & C BAC6CXN36AA in a 6.0 liter vented enclosure tuned to 76.5 Hz, reaching an F3 cutoff of approximately 114.4 Hz.

Can B & C BAC6CXN36AA be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 7.5 liters with a Qtc of 1.344 (above Butterworth: Qtc cannot fall below Qts (0.95)), the system exhibits an F3 of 103.0 Hz.

What port dimensions should be used for B & C BAC6CXN36AA to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 13.2 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.

Shareable Acoustic Card for Forums & Social Media

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