![](https://stylensound.fi/wp-content/uploads/2024/04/0bf3d1_9420e74dffdd4adeb036d4214ea79c03mv2-150x150.webp)
Zapco ST-204D SQ III
13.4.2024![](https://stylensound.fi/wp-content/uploads/2024/05/402-150x150.jpg)
Arc Audio X2 402
23.5.20241.10SD4
Free air resonancse (Fs): 34.2 Hz
Electrical “Q” (Qes): 0.89
Mechanical “Q” (Qms): 5.42
Total speaker “Q” (Qts): 0.76
Equivalent Compliance (Vas): 27.6 L
Effective piston area (Sd): 338.1 mm2
Mechanical resistance (Kg/s): 5.0
DC resistance* (Re, Ohm): 1.8
Suspension compliance (Cms): 0.17 mm/N
Moving mass (Mms): 124.1 gr
Voice coil inductance (@1KHz): 0.5 mH
1.10SD2
Free air resonancse (Fs): 34.6 Hz
Electrical “Q” (Qes): 0.72
Mechanical “Q” (Qms): 4.58
Total speaker “Q” (Qts): 0.62
Equivalent Compliance (Vas): 26.8 L
Effective piston area (Sd): 338.1 mm2
Mechanical resistance (Kg/s): 6.1
DC resistance* (Re, Ohm): 1.0
Suspension compliance (Cms): 0.17 mm/N
Moving mass (Mms): 127.5 gr
Voice coil inductance (@1KHz): 0.3 mH