What is the recommended ported (bass reflex) box volume for SB Acoustics SB17NRX2C35-4?

According to electroacoustic alignment calculations, SB Acoustics SB17NRX2C35-4 performs optimally in a 23.9 liter vented enclosure tuned to 37.0 Hz, reaching an F3 cutoff of approximately 36.3 Hz.

Can SB Acoustics SB17NRX2C35-4 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 10.4 liters with a Qtc of 0.707, the system exhibits an F3 of 68.3 Hz with tight transient response and natural roll-off.

What port dimensions should be used for SB Acoustics SB17NRX2C35-4 to avoid port chuffing?

To keep vent air velocity below turbulence limits at rated power, a minimum port diameter of 5.0 cm with a length of 14.4 cm is recommended.

Versatile Load

SB Acoustics SB17NRX2C35-4

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

75.95 EUR

Check Price & Availability ↗ Open in Load Forge Simulator ↗

Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	23.9 Liters
Tuning Frequency (Fb)	37.0 Hz
F3 (-3 dB Cutoff)	36.3 Hz
F6 / F10 Extension	32.2 Hz / 28.3 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	14.4 cm
First Pipe Resonance	1193.0 Hz
Estimated MOL @ F3	101.3 dB SPL

Simulate This Reflex Box in App →

Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	10.4 Liters
System Q (Qtc)	0.707 (Butterworth Q=0.707)
System Resonance (Fc)	67.2 Hz
F3 (-3 dB Cutoff)	68.3 Hz
F6 / F10 Extension	51.5 Hz / 38.8 Hz
Air Spring Linearity	High (Zero port compression)

Simulate This Sealed Box in App →

Verified Thiele/Small Parameters

Resonance (Fs)	36.0 Hz
Total Q (Qts)	0.37
Electrical Q (Qes)	0.403
Mechanical Q (Qms)	4.49

Equivalent Volume (Vas)	27.6 Liters
Diaphragm Area (Sd)	118.0 cm²
DC Resistance (Re)	3.1 Ω
Efficiency Bandwidth Product (EBP)	89.3

Linear Excursion (Xmax)	5.5 mm
Thermal Power (Pe)	60.0 W
Nominal Diameter	6.0"
Catalog Source	Manufacturer Official Datasheet

Shareable Acoustic Card for Forums & Social Media

Embed this verified design card on DIYAudio, AVSForum, Reddit, or Facebook. Includes verified F3, MOL, and box parameters.

SB Acoustics SB17NRX2C35-4 Enclosure Card

Copy Forum BBCode (DIYAudio / AVSForum)

[url=https://loadforge.io/drivers/sb-acoustics-sb17nrx2c35-4][img]https://loadforge.io/api/v1/card/sb-acoustics-sb17nrx2c35-4.svg[/img][/url]
[b]SB Acoustics SB17NRX2C35-4[/b] — 23.9L Bass Reflex tuned to 37.0Hz (F3: 36.3Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

Download SVG Card 📥

Not sure if SB17NRX2C35-4 fits your physical space?

Don't force a driver into the wrong box. Use Bass Match to calculate which of 9,000+ verified manufacturer drivers delivers the highest SPL, lowest F3, and cleanest port air velocity for your exact trunk or room dimensions.

Run Bass Match for Your Space ⚡