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Resumen del manual
• The gain adjustment allows you to set proper signal match for clean, quiet amplifier operation. For full-range and simultaneous stereo/mono bass applications, start by playing some music you are familiar with. With the gain adjustment on the amplifier in the middle of its rotation, bring up the volume on your head unit to the 3/4 volume setting or until you start to hear distortion or clipping. If you hear distortion before you reach the 3/4 volume setting of your head unit, reduce the gain setting on the amplifier and start to raise the head unit volume again. When you can listen to the music at or slightly above 3/4 on your head unit without audible distortion, slowly raise the gain of the amplifier until distortion is heard, then back off the gain until the distortion is not audible. This setting will allow you to reach full output with all but the quietest of source material, while avoiding excessive noise in the system. N NNo oot tte ee: ::Remember that the 1200t uses a digital gain control with a finite number of adjustment steps. A very small adjustment may not cause any audible change in level. • The same procedure should be used for adjusting the amplifier when the on board crossover is set to LOW or HIGH, but you will also have to take into consideration the effect that gain adjustment has on system frequency response and imaging. Again, plan on spending some time with music that you know getting the gain and crossover settings the way you like. Test discs and analyzers may help with this process, but in the end it's your ears that count - listen to the music! © 2004 Directed Electronics, Inc SUBSONIC FILTER ADJUSTMENT This amplifier incorporates a subsonic filter to maximize the performance of a subwoofer. The subsonic filter is a high pass filter that removes unwanted bass output at very low frequencies from the woofer. This increases the output of a subwoofer by as much as 3 dB by increasing the mechanical power handling of the subwoofer. Depending on the type of enclosure the subsonic filter can increase the useable low frequency output by an additional 10 dB! Acceptable boost levels are determined by the type of enclosure used, wattage of the amplifier, and the woofer’s excursion capability. To adjust this filter, place the Subsonic Filter switch to the IN position and turn the Subsonic Frequency adjustment to the desired frequency (15–50 Hz). The following guidelines should be used for proper set-up of the subsonic filter to provide optimum performance and reliability from your system. • Sealed Enclosure: Set to Fs of the woofer or higher. • Ported Enclosure: Set to tuning frequency of enclosure or higher. • Sealed Bandpass: Set to Fs of enclosure. • Ported Bandpass: Set to low tuning frequency of enclosure. • Infinite Baffle: Set to Fs of the woofer or higher. • Aperiodic: Set to Fs of the woofer or higher. © 2004 Directed Electronics, Inc SPECIFICATIONS Power Output: 200 Watts RMS X 2 Channels at 4 Ohms and < 1% THD+N Signal to Noise Ratio: 80 dBA (reference 1 Watt into 4 Ohms) RMS continuous power per channel, driven in 4 225 Watts RMS @ 4 ohms ohm mode @ 14.4 VDC 450 Watts RMS @ 2 ohms 900 Watts bridged @ 4 ohms RMS continuous power per channel, driven in 1 150 Watts RMS @ 4 ohms ohm mode @ 14.4 VDC 275 Watts RMS @ 2 ohms 500 Watts RMS @ 1 ohms 1000 Watts bridged @ 2 ohms Conversion Efficiency >82% @ 4 ohms Total Harmonic Distortion THD+N (10Hz–30kHz BW) 4 ohms, 180 watts <0.08% 2 ohms, 400 watts <0.2% 1 ohm, 450 watts <0.5% Frequency Response 20-20,000 Hz Signal-to-Noise Ratio >98 dB Separation 65 dB @ 1 kHz Damping Factor >150 Crossover Type/Range 2-way Butterworth/55 to 550 Hz Crossover Slope 12 dB/octave stereo 24 dB/octave mono (Lowpass mode) Bass Equalization Variable 0 to +12 dB Subsonic Filter Variable, 15–50 Hz © 2004 Directed Electronics, Inc RCA Input/Output Jacks 2-channel in/2-channel buffered full-range out Input Impedance 30K ohms Input Sensitivity Variable from 250 mV to 8 volts Supply Voltage 10 to 16 VDC Fusing and Power 30A (qty 3) Minimum Cable Requirements (AWG) #8 Dimensions 19 x 9. x 2 inches Port Output (Optional Fan) 12V @<200mA © 2004 Directed Electronics, Inc Directed Electronics, Inc. Vista, California 92081 The company behind this system is Directed Electronics, Inc. Since its inception, Directed has had one purpose, to provide customers with the finest vehicle security, car stereo products, rear seat entertainment, and accessories available. The recipient of more than 20 patents in the field of advanced electronic technology, Directed is ISO 9001 registered. Directed® is committed to delivering world-class quality products and services that excite and delight our customers. Directed is a proud member of Quality Directed products are sold and serviced throughout North America and around the world Call 800 274 0200 for more information about our products and services © 2004 Directed Electronics, Inc. -All rights reserved -G45027 10/04 ...