
CSX 257 H 



CSX 257 H 







Thiele Small parameters: 


Free air 
Common 
Baffled 


Nominal impedance 
Zn 
(ohm) 

8 



Minimum impedance/at freq. 
Zmin 
(ohm/Hz) 

6.2/130 



Maximum impedance 
Zo 
(ohm) 

40.3 



DC resistance 
Re 
(ohm) 

5.5 



Voice coil inductance 
Le 
(mH) 

2.9 



Capacitor in series with 8 ohm 
Cc 
(µF) 

25 



Resonance Frequency 
fs 
(Hz) 
22.6 

21.9 


Mechanical Q factor 
Qms 

2.56 

2.64 


Electrical Q factor 
Qes 

0.40 

0.42 


Total Q factor 
Qts 

0.35 

0.36 


F (Ratio fs/Qts) 
F 
(Hz) 


61 


Mechanical resistance 
Rms 
(Kg/s) 

2.87 



Moving mass 
Mms 
(g) 
51.9 

55.1 


Suspension compliance 
Cms 
(mm/N) 

0.96 



Effective cone diameter 
D 
(cm) 

20.5 



Effective piston area 
Sd 
(cm²) 

330 



Equivalent volume 
VAS 
(ltrs) 

144.4 



Force factor 
Bl 
(N/A) 

10.0 



Reference voltage sensitivity 

(dB) 


88.2 


Magnet and voice coil parameters: 







Voice coil diameter 
d 
(mm) 
39 




Voice coil length 
h 
(mm) 
26 




Voice coil layers 
n 

4 




Flux density in gap 
B 
(T) 
0.85 




Total useful flux 

(mWb) 
1.34 




Height of the gap 
hg 
(mm) 
8 




Diameter of magnet 
dm 
(mm) 
115 




Height of magnet 
hm 
(mm) 
22 




Weight of magnet 

(kg) 
0.87 




Power handling: 






Long term Max System Power (IEC) 
(W) 
200 


