What is the recommended ported (bass reflex) box volume for Peerless by Tymphany TC9FD18-08?

According to electroacoustic alignment calculations, Peerless by Tymphany TC9FD18-08 performs optimally in a 1.5 liter vented enclosure tuned to 110.5 Hz, reaching an F3 cutoff of approximately 138.3 Hz.

Can Peerless by Tymphany TC9FD18-08 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 3.9 liters with a Qtc of 1.084, the system exhibits an F3 of 124.3 Hz with tight transient response and natural roll-off.

What port dimensions should be used for Peerless by Tymphany TC9FD18-08 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 28.6 cm is recommended.

Reflex Optimized

Peerless by Tymphany TC9FD18-08

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

34.95 EUR

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⚠️ Engineering Notice for Builders

Limited linear excursion (Xmax: 3.88 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)	110.5 Hz
F3 (-3 dB Cutoff)	138.3 Hz
F6 / F10 Extension	111.6 Hz / 84.1 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	28.6 cm
First Pipe Resonance	602.0 Hz
Estimated MOL @ F3	101.0 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	3.9 Liters
System Q (Qtc)	1.084 (Butterworth Q=0.707)
System Resonance (Fc)	142.4 Hz
F3 (-3 dB Cutoff)	124.3 Hz
F6 / F10 Extension	103.7 Hz / 83.9 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	130.0 Hz
Total Q (Qts)	0.97
Electrical Q (Qes)	1.44
Mechanical Q (Qms)	2.97

Equivalent Volume (Vas)	1.0 Liters
Diaphragm Area (Sd)	36.3 cm²
DC Resistance (Re)	6.2 Ω
Efficiency Bandwidth Product (EBP)	90.2

Linear Excursion (Xmax)	3.9 mm
Thermal Power (Pe)	30.0 W
Nominal Diameter	3.5"
Catalog Source	Manufacturer Official Datasheet

Shareable Acoustic Card for Forums & Social Media

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Peerless by Tymphany TC9FD18-08 Enclosure Card

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[url=https://loadforge.io/drivers/peerless-by-tymphany-tc9fd18-08][img]https://loadforge.io/api/v1/card/peerless-by-tymphany-tc9fd18-08.svg[/img][/url]
[b]Peerless by Tymphany TC9FD18-08[/b] — 1.5L Bass Reflex tuned to 110.5Hz (F3: 138.3Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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