Usher 8948A 88/2.2 Driver

Here we have an Usher 8948A Woofer (7 Inch Driver)

Good condition and boxed.

Usher Specifications:

Nominal Impedance: 8 Ω ± 15 % at 1.0 V 1 kHz

VC Nominal Dia: Ψ 42 mm

Lowest Resonance Frequency: FO = 31 Hz ± 5 Hz at 1.0 V

Effective Frequency Range: FO ~ 7.5 kHz – 10 dB 1 M/1 W

Output Sound Pressure Level: 88 dB/W/M ± 3 dB 300, 400, 500, 600 Hz AVE

Input: Rated Input 70 W, Maximum Input 100 W

Flux Density: 11 K ± 10% Gauss

Buzz & Rattle Test: 8.0 V

Polarity: Positive – (Left) Hand Terminal

Baffle Opening: Ψ 138 mm

Magnet Dimension / Weight: 120 x 60 x 25 (mm) / 1055 g

Weight: 2600 g

Dropping Test: 1150 mm 75° ± 2°

ZNOM: 8 Ω

REVC: 5.6 Ω

KRM: 12.954 mΩ

KXM: 14.698 MH

ERM: 0.557

EXM: 0.571

SD: 0.015 sqm

BL: 8.1673 tm

VAS: 43.6622 Litre

CMS: 1366.549 um/n

MMS: 19.3562 g

MMD: 18.2999 g

FI: 30.134 Hz

FO: 30.945 Hz

QMS: 1.947

QES: 0.316

QTS: 0.272

PMX: 70 W rms

HVC: 18 mm

HAG: 6 mm

XMX: 6 mm

CMX: 6 mm

CMO: 1

ΘVC: 3.5714 C/W