Specification Sheet
ULTRA 12" Mid-Woofer
SV-300W-08-156-0035-01
35–5kHzFrequency Range
87dBSensitivity
8ΩImpedance
500WRated Power
Features12 inch woofer · High-damping, anti-resonant basket · Ultra-Low Distortion magnetic Circuit Design · Heat-resistant Voice Coil
01General Specification
| Unit | Value | |
|---|---|---|
| Diameter | mm | Φ316 |
| Nominal impedance | Ω | 8 |
| Program power [1] | W | 500 |
| AES power rating [2] | W | 300 |
| Sensitivity [3] | dB | 87 |
| Frequency range | Hz | F0–5kHz |
| Voice coil diameter | inch | 2.5 |
| Frame material | — | Alloy basket |
| Magnet material | — | Ferrite |
| Recommended crossover [4] | Hz | 500Hz |
| Xmax [5] | mm | 4.7 |
| Driver displacement enclosure | L | 3.866 |
03Shipping Information
| Net weight | kg | 7.0 |
| Unit size | mm | ∅316×H158 |
| Multipack weight | kg | — |
02LF T/S Parameters [6]
| DC resistance | Re (Ω) | 7.7 |
| Resonance frequency | Fs (Hz) | 36 |
| Moving mass | Mms (g) | 127.5 |
| Compliance | Cms (mm/N) | 0.15 |
| Mechanical losses | Rms (kg/s) | 7.45 |
| Force factor | BL (N/A) | 26.7 |
| Mechanical Q-factor | Qms | 3.9 |
| Electrical Q-factor | Qes | 0.3 |
| Total Q-factor | Qts | 0.3 |
| Equivalent air volume | Vas (L) | 47.72 |
| Voice coil Inductance | Le (mH) | 0.6 |
| Diaphragm area | Sd (cm²) | 471.44 |
| Reference efficiency | η0 (%) | 0.7 |
04SPL & Impedance Curve
05Dimensions mm
Test Notes
- Program power is defined as 3 dB greater than AES power.
- Tested in free air for two hours using a continuous band-limited pink noise signal as per AES 2-1984 Rev. 2003.
- Measured on axis at 2 V, 1 m; SPL is the average at 200, 500, 800 and 1000 Hz.
- High-pass filter with slope 12 dB/oct. or higher.
- Xmax = (Hvc − Hg) / 2, where Hvc is voice-coil height and Hg the gap height.
- Thiele-Small parameters measured after preconditioning (20–22 °C, 50% RH, 2 h) by Klippel LSI. All specifications subject to change without notice.