Q-PLUGS

Custom Designed Port Plugs Designed specifically for use in our Sierra-LX to allow bass tuning, these fully Made-In-USA port plugs also work well in our Sierra-1 and Sierra-2EX models. Each set of Q-Plugs includes one plug for fully sealing the port (plug "S") and an open plug (plug "O"). Plug "S" seals the rear port and changes the low frequency roll off from 24dB/octave to 12dB/octave with a -3dB point of 70Hz. Plug "O" dampens resonance and port noise, reduces bass output in the 50-100Hz range while increasing bass output below 40Hz. Priced per set, 1 set per speaker, a speaker pair requires 2 sets.