Proson Stratego Sub 12+

[Ilkka]

Manufacturer: Proson
Model: Stratego Sub 12+
Provided by: Luoti
Manufacturer link: Proson - Proson Stratego Sub 12+
Price: 320 EUR

Manufacturer specs:
• Construction: Slotted Bassreflex in back
• Woofer: 12-inch long-throw
• Frequency Response: 22 - 150 Hz
• Crossover Frequency: 50 - 150 Hz
• Max Power: 300 W
• R.M.S. Power: 180 W
• Low level in/out
• High level in and filter out
• Volume control
• Variable lowpass filter
• Variable phase 0/180
• On-auto-off switch
• Size (HxWxD): 550 x 381 x 500 mm
• Weight: 27.5 kg

Configuration as tested:
Phase: 0 degrees
Orientation: Sideways

[Ilkka]

+/- 3 dB points: 33.5 Hz - >200 Hz

[Ilkka]

[Ilkka]

Doesn't go extremely deep, although the final roll off is rather shallow for a vented subwoofer. The built-in crossover isn't really useful with its ~100 Hz minimum setting, which will definitely cause a lot of mid/upper bass bloom. Useful mid bass maximum output goes all the way up to 105 dB. Deep bass output is rather limited at around 80-90 dB. THD stays really low down to 30 Hz, but skyrockets below. 110 dB sweeps shows severe amp clipping. Group delay is really low at all frequencies. Spectral decay shows only little ringing. Spectral contamination tests shows rather high maximum output capability, but with high overall distortion. The overall build quality follows the price of the subwoofer.

+ Good shape of the frequency response for smaller rooms
+ High and clean upper bass maximum output capability

- Extremely bad built-in crossover
- Weak extension
- Low deep bass output
- Really high deep bass distortion