Dayton Audio ND91-4 standard | Fs 74 Hz, 81.4 dB, Qts 0.409 | LoudspeakerLab

Thiele-Small parameters

Fs: 74 Hz; Qts: 0.409; Qes: 0.453; Qms: 4.240; Vas: 1.40 L; Sd: 32.2 cm²; Re: 4.28 Ω; Le: 0.83 mH; Sensitivity: 81.4 dB; Nominal Z: 4.9 Ω; Measured range: 20-20000 Hz

Driver quality scores

On-axis flatness 75 · DI tracking 57 · DI smoothness 42

Usable passband

Scored passband 110 Hz–8.4 kHz

Measurement coverage

Spec-sheet profiles · Off-axis H/V response data available.

Recommended enclosure

Vented ~1.2 L · Fb 80 Hz

Measurement profiles

• spec sheet (spec_sheet)

Where to buy

• parts_express — $27.98 USD
• rumoh — $33.95 EUR
• solen — $44.18 CAD
• soundimports — $28.06 EUR
• theloudspeakerkit — $65.00 AUD

Measurement quality

LoudspeakerLab evidence grade: C+ (56.8/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.

More from Dayton Audio

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Manufacturer

• Dayton Audio