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Audio calculators

Loudspeakers

Sealed box response

Enter the net volume of an existing enclosure to estimate its system Q, resonance and −3 dB point.

Inputs

Example values

Greater than 0 · max 1,000

Greater than 0 · max 10

Greater than 0 · max 10,000

Greater than 0 · max 10,000

Point or comma for decimals.

Results

Updates as you type

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The calculation

Qtc = Qts × √(1 + Vas / Vb)
Fc = Fs × √(1 + Vas / Vb)
A = 1 / Qtc² − 2
F3 = Fc × √[(A + √(A² + 4)) / 2]

Assumptions & limits

A rigid, airtight box with one driver and negligible additional losses. Enter net air volume. Stuffing, leakage, series resistance and excursion limits are not modelled.

Background: Loudspeaker parameters · Elliott Sound Products
Hifi Kit · Audio calculatorsIdeal models. Real builds need measurements.