Quality comes in all levels. When you compare a Toyota Corolla, a Mercedes CLS550 or a Lamborghini Geneva, the features are extremely different, but all are quality vehicles. The Sedona subwoofers address the entry level price point but sacrifice no quality. Sedonna subwoofers come in 12" and 15" with dual 4-ohm voice coils and work well in sealed, vented and bandpass enclosures...

  S.12 S.15
Fs (hz) 22.89 19.52
Qms 3.57 4.279
Vas (ft^3) 3.34 5.076
Cms (mm/n) 0.266 0.146
Mms (g) 181.5 456.7
Rms (kg/s) 7.311 13.09
Xmax 8.1 8.1
Xmech 12.15 12.15
Dia (in.) 11.26 12.83
Sd (in^2) 77.5 129.2
Vd (ft^3) 0.019 0.036
Qes 0.755 0.933
Re (ohms) 7.2 7.2
Z (ohms) 8 8
BL 15.78 20.79
Pe (watts) 250 300
Qts  0.623 0.766
No 0.145 0.111
1w/1m SPL 83.64 82.47
2.8v SPL 84.22 83.06
VC DIA (IN) 2 2
VC (Ohms) DVC4 DVC4
M-vd (ft^3) 0.0956 0.174
Cut-out 11.25 13.88
Depth 5 6.375
Model C.12 B.12
RMS Power (watts) 200 300
Efficiency (1w/1m dB) 84dB 86dB
Voice Coil Configuration 2.5" Dual 4Ω 2.25" Dual 4Ω
Mounting Depth 5" 5"
Optimum Sealed ft³ 1.00 1.00
Optimum Ported ft³ 2.00 2.00
  S.12 S.15
Sm Sealed 1.00 2.00
Qtc 1.221 1.33
F3 35.46 26.54
Med Sealed 1.50 3.00
Qtc 1.056 1.166
F3 31.91 23.99
Lg Sealed 2.00 4.00
Qtc 0.962 1.066
F3 30.16 22.61
  S.12 S.15
Sm Vented 2.00 3.00
port 4x12 (2)3x12
Fb 35.02 30.66
F3 30.13 25.77
Med Vented 2.50 4.00
port 4x12 (2)4x20
Fb 28.14 28.7
F3 25.75 23.4
Lg Vented 3.00 5.00
port 4x12 (2)4x20
Fb 25.82 25.43
F3 23.88 20.64