With this technology:
Crossovers, filters, phase, and contours are all controlled digitally through the use of a Digital Signal Processor.
Energy Recovery amplifiers used are digital switching class D, delivering high power in a compact space with little heat generation.
High Gain Servo technology is all-digital, including a digital accelerometer that delivers a digital representation of cone movement that is checked up to 15,800 times per second compared to the previous correction rate of 3,500 times per second.
Parametric Equalizers (EQs)
Unlike other subwoofers that contain either one or possibly three parametric EQs, Digital Drive supplies eight EQs. Each EQ is fully adjustable for Frequency (F), Level (+ or – dB), and Q. “Q” in this case means quality of the filter – in other words, how narrow a frequency range the filter applies to. The higher the Q, the more narrow a frequency range is filtered.
Low Pass Crossover - Low pass crossover passes only the low frequencies of the incoming signal to subwoofer. It is adjustable between 20 and 199 Hz and can have a slope of 6, 12, 18, 24, 30, 36, 42, or 48 dB/Octave.
Subsonic Filter - Subsonic filtering was once called a rumble filter, but still performs the same function limiting the lowest frequencies that the subwoofer plays. It is adjustable between 20 and 199 Hz and can have a slope of 6, 12, 18, 24, 30, 36, 42, or 48 dB/Octave.
Phase - Phase of the subwoofer is adjustable in 15 degree increments between 0 and 180 degrees.
Polarity - Reverses the phase 180 degrees and is set to either + or -.
Listening Mode Presets - For each preset, there is a “contour” (extra EQ) with a Frequency, Level and Q setting. This lets the subwoofer react differently for different types of movies and musical source content. Additionally, each preset provides full customization of all the other settings such as volume, slope, crossovers, and EQs. There are factory default contours for Action-Adventure, Movies, Rock-Pop, and Jazz-Classical. Preset 5 is for user customization, and Preset 6 is set as a defeat of all equalization to demonstrate the effects of Digital Drive room equalization.
Volume - While there is an overall system volume, each preset can also have a volume differential applied automatically when selected.
Theater/Music Adjustment - There has been a long-standing debate over whether a subwoofer is designed to be “musical”(i.e. it is tight and fast for music), or “theatrical” (i.e. it impressively reproduces explosions and other low frequency information found in movies). The theater/music setting lets the user choose the kind of subwoofer – theatrical or musical. The effect of the setting is to control the amount of loop gain in the servo system, thus controlling the amount of distortion in the reproduced audio signal.
Night Mode - This limits the subwoofer’s output.
RS-232 Input - Digital Drive Subwoofers can accept RS-232 input.
Daisy Chaining Subwoofers Together - More than one subwoofer can be “daisy-chained” together. The EQ settings for the first subwoofer in the chain automatically are passed down to the other subs in the chain. This means the room must be adjusted only once for as many subwoofers as are desired in the chain.
Programming Updates - The RS-232 in port is also used to provide programming updates to Digital Drive units. This is useful to resolve technical problems or provide new features to the Digital Drive Subwoofer. A Windows application drives the update via a serial port of an IBM PC compatible computer.
Inadvertent Settings Modification Protection - After 15 minutes of inactivity or if the EXIT key is pressed on the remote, the subwoofer reverts to a locked out state to prevent inadvertent changing of subwoofer settings.
Социальные закладки