GRS 4PF-8 standard | Fs 137 Hz, 84.3 dB, Qts 1.940 | LoudspeakerLab

Thiele-Small parameters

Fs: 137 Hz; Qts: 1.940; Qes: 2.900; Qms: 5.810; Vas: 1.13 L; Sd: 55.2 cm²; Re: 6.80 Ω; Le: 0.50 mH; Sensitivity: 84.3 dB; Nominal Z: 7.1 Ω; Measured range: 19-19896 Hz

Driver quality scores

On-axis flatness 54

Usable passband

Scored passband 202 Hz–8.0 kHz

Measurement coverage

Spec-sheet profiles

Recommended enclosure

Sealed ~5.2 L

Measurement profiles

• spec sheet (spec_sheet)

Where to buy

• parts_express — $9.99 USD
• solen — $12.19 CAD
• soundimports — $11.53 EUR

Measurement quality

LoudspeakerLab evidence grade: C (47.0/100). Based on measurement provenance, off-axis data, distortion, and T/S completeness.