ScanSpeak Revelator 26W/8867T

Up for test, is the ScanSpeak Revelator 26W/8867T Aluminum Cone 10″ Woofer.

IMG_8818 IMG_8819

Small Signal Analysis

Electrical Parameters
Re 6.08 Ohm electrical voice coil resistance at DC
Le 0.296 mH frequency independent part of voice coil inductance
L2 0.299 mH para-inductance of voice coil
R2 2.88 Ohm electrical resistance due to eddy current losses
Cmes 533 µF electrical capacitance representing moving mass
Lces 55.99 mH electrical inductance representing driver compliance
Res 91.54 Ohm resistance due to mechanical losses
fs 29.1 Hz driver resonance frequency
fm 23.6 Hz resonance frequency of driver with additional mass
Mechanical Parameters
(using add. mass)
Mms 52.776 g mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd) 46.307 g mechanical mass of voice coil and diaphragm without air load
Rms 1.081 kg/s mechanical resistance of  total-driver losses
Cms 0.566 mm/N mechanical compliance of driver suspension
Kms 1.77 N/mm mechanical stiffness of driver suspension
Bl 9.949 N/A force factor (Bl product)
Loss factors
Qtp 0.556 total Q-factor considering all losses
Qms 8.934 mechanical Q-factor of driver in free air considering Rms only
Qes 0.593 electrical Q-factor of driver in free air considering Re only
Qts 0.556 total Q-factor considering Re and Rms only
Other Parameters
Vas 81.9789 l equivalent air volume of suspension
n0 0.328 % reference efficiency (2 pi-radiation using Re)
Lm 87.36 dB characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom 88.56 dB nominal sensitivity (SPL at 1m for 1W @ Zn)

ScanSpeak Revelator 26W8867T impedance

Large Signal Analysis

Displacement Limits thresholds can be changed in Processing property page
X Bl @ Bl min=82% 9.8 mm Displacement limit due to force factor variation
X C @ C min=75% 11.7 mm Displacement limit due to compliance variation
X L @ Z max=10 % >12.8 mm Displacement limit due to inductance variation
X d @ d2=10% 42.1 mm Displacement limit due to IM distortion (Doppler)

Force factor Bl (X) Bl Symmetry Range Mechanical compliance Cms (X) Stiffness of suspension Kms (X) Kms Symmetry Range Electrical inductance L(X, I=0) Inductance over current L(X=0, I) Total loss factor Qts (X) Resonance frequency fs (X) Mechanical loss factor Qms (X) Electrical loss factor Qes (X)

2 thoughts on “ScanSpeak Revelator 26W/8867T

  1. Hey m8.Did you actually use the woofer?Are you happy with the outcome?Thanks a lot for the Klippel review!

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