Features
Variable crossover with bypass, for use with any sort of audio system
Auto-on, or "always-on" settings with power LED ensure you are ready to roll
Continuously variable phase and gain controls make basic setup a snap
Extra heavy detachable power cord and main power breaker with fuse
Variable extension switch with 20Hz, 15Hz, 10Hz and sealed settings, for your choice in depth
Single band Parametric Equalizer (PEQ), for advanced customized sound
Defeatable high-pass filters on all outputs, allow easy setup of twin subwoofers
Room-size compensation control, to tame the bass for your room
Stereo, low-level RCA and XLR inputs and outputs, no surround sound processor needed
Lead-free world-standard amp design
Aluminum control knobs and heavy black anodized panel for durable stylish looks
Modular design allows easy servicing by anyone
Light, cool running design means years of trouble-free performance
Multiple extension design
Multiple depth or "extension" options allow you to easily create "lower than low" bass in seconds, with just a flip of a switch and use of specially designed foam plugs which are included with each sub. As it is, the PB13-Ultra is configured to run exceptionally strong down to 20Hz and even lower (with all three ports firing). This is already far deeper than most subwoofers on the market, and since typical rooms will "gain" deep bass in this region, the standard "out of box setting" will provide strong response to around 15Hz with the preferred corner placement. This is extreme bass. Clean and powerful audio this deep is already exceptional and verges on the point of "subsonic" sound (which is that point where the ear is less an influence on your senses, yet you can still "feel" the bass). Above this point is where nearly all music and movie bass is centered, no matter if you are watching DVD's or listening to CD's or other forms of music. It also is the most efficient mode for the PB13-Ultra, with amazing "sound pressure level" capacity, and incredible accuracy to the source material at all sound pressure levels, low or loud, even in larger rooms.
Want deeper still? If you are willing to give up a few decibels in SPL capacity above 20Hz (and the PB13-Ultra has more "headroom" than most folks will use), then insert one, or even two port plugs, click over the subsonic filter knob to the corresponding 15Hz or 10Hz position and you are ready to move your home. Most users would experience strong output to around 15Hz with good placement in a typical room with a 20Hz setup. This is the sort of sound that's literally freightening when done with clean power and low distortion.
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Re: Subwoofers: HI-FI Vs. Pro
Iniciado por Rafael49
... veo monstruo subs americanos de 18" con 30 kilillos menos.... se ve que está bien alimentado el muchacho 
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. El 12" que lleva es frontal pero ya digo que el BR es hacia abajo.
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