Sine Design

SB Acoustics SB17CRC35-4

midwoofer · EBP 90 → suits either box · nominal (full) — SB Acoustics datasheet (https://sbacoustics.com/wp-content/uploads/2020/02/6in-SB17CRC35-4.pdf)

Thiele/Small parameters

Fs (resonance)31.5 Hz
Qts0.32
Qes / Qms0.35 / 4.32
Vas35.5 L
Re / nominal Z— / —
Xmax—
Sensitivity90 dB (2.83 V/1 m, mfr)
Power handling60 W

Published (nominal) values, params full — verify by measurement (DATS/REW) before building.

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

T/S are full — fetch the datasheet for the full parameters to model a box.

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About this driver

The SB Acoustics SB17CRC35-4 is a 6″ midwoofer with a free-air resonance of 31.5 Hz and a total Q (Qts) of 0.32. Its efficiency-bandwidth product (EBP) of 90 points toward either alignment. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the SB Acoustics SB17CRC35-4 in a two-way design — each grade is a modeled estimate of the crossover match, with a suggested crossover point. Open any pair in the guided builder to design the crossover and total the parts.

Modeled estimate from T/S + geometry — no measurements. The verdict is robust; it improves with measured FRD/ZMA data.

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