ULTRA SERIES

ULTRA 3.5" Subwoofer Driver

Model  SV-095S-04-085-0068-02

70–3kHzFrequency Range
77dBSensitivity
4ΩImpedance
40WRated Power

Features

  • 3.5 inch Subwoofer diaphragm
  • Carbon Fiber Low-Frequency Diaphragm
  • Ultra-Low Distortion magnetic Circuit Design
  • Heat-resistant Voice Coil
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01General Specification
UnitValue
Diameter mmL93*W93
Nominal impedance Ω4
Program power [1] W40
AES power rating [2] W30
Sensitivity [3] dB77
Frequency range HzF0–3kHz
Voice coil diameter inch1.2
Frame material Iron basket
Magnet material Ferrite
Recommended crossover [4] Hz250Hz
Xmax [5] mm2.25
Driver displacement enclosure L0.267
02LF T/S Parameters [6]
DC resistanceRe (Ω)3.2
Resonance frequencyFs (Hz)70
Moving massMms (g)16.7
ComplianceCms (mm/N)0.28
Mechanical lossesRms (kg/s)2.3
Force factorBL (N/A)8.1
Mechanical Q-factorQms3.4
Electrical Q-factorQes0.4
Total Q-factorQts0.35
Equivalent air volumeVas (L)0.68
Voice coil InductanceLe (mH)0.95
Diaphragm areaSd (cm²)41.28
Reference efficiencyη0 (%)0.05
03Shipping Information
Net weightkg0.91
Unit sizemmL93×W93×H59
Multipack weightkg
04SPL & Impedance Curve
SPL and impedance curve
Measured with KLIPPEL equipment, on baffle, in Sovox's full-scale anechoic chamber.
05Dimensions mm
dimension drawing dimension drawing

Test Notes

  1. Program power is defined as 3 dB greater than AES power.
  2. Tested in free air for two hours using a continuous band-limited pink noise signal as per AES 2-1984 Rev. 2003.
  3. Measured on axis at 2 V, 1 m; SPL is the average at 200, 500, 800 and 1000 Hz.
  4. High-pass filter with slope 12 dB/oct. or higher.
  5. Xmax = (Hvc − Hg) / 2, where Hvc is voice-coil height and Hg the gap height.
  6. Thiele-Small parameters measured after preconditioning (20–22 °C, 50% RH, 2 h) by Klippel LSI. All specifications subject to change without notice.