User manual BLAUPUNKT VD 504

[. . . ] Do not connect loudspeakers to earth ­ only use the correct terminals as indicated. The cross section of the positive and negative cables must be at least 16 mm2. The positive cable between the battery and the amplifier must be protected directly at the battery using a fuse holder (75 amperes). Congratulations on purchasing this high-quality car audio amplifier. [. . . ] Power 2 ohms RMS power 4 ohms RMS power 2 ohms Frequency response Signal-to-noise ratio Input sensitivity Stability Low pass filter (Low Pass) High pass filter (High Pass) Bass boost Subsonic filter Remote control for bass level Dimensions WxHxD (mm) with end caps Positive/negative connection The cross section of the positive and negative cables must be at least 16 mm2. Use cable grommets to protect cables against sharp-edged holes. Securely screw a standard 16 mm2 negative cable to an interference-free earth connection point (bolt connected to the car body, car body sheet metal) ­ though do not connect it to the negative terminal of the battery. Scratch the surface down to the bare metal at the point at which the earth contact is made and apply graphite grease. 7 The switching line must be connected when connection is carried out +12V using the RCA jacks or the loudspeaker jacks of the car radio. Tri mode You can operate 2 loudspeakers and at the same time switch on a third loudspeaker in mono mode (bridge mode) (see Fig. LEVEL control You can use the LEVEL control to adjust the input sensitivity of the Velocity power amplifier to the output voltage of your car radio's preamp output. When connecting a car radio produced by another manufacturer, you must adjust the input sensitivity in accordance with the information provided by the manufacturer. This gives you the convenience of controlling the bass level remotely for channels 3+4 (see Fig. If you want to use the remote control, the device must be operated with the low-pass filter activated (crossover switch set to position LP). iNPUT Preamp inputs for the right and left channels. Please use high-quality Velocity RCA cables for this connection. oUTPUT Outputs for connecting an additional amplifier (formation of chains of amplifiers). Please also use high-quality Velocity RCA cables for this connection. LP / HP / FLAT switch Before installing, adjust the crossover switch on the power amplifier to set the low pass filter (LP), high pass filter (HP) or full range (FLAT). If you select the FLAT position, the full frequency response will be used at the output. Using the integrated crossovers is particularly useful in the case of multi-channel sound systems with a separate subwoofer. In order to obtain the best sound when a subwoofer is connected, the subwoofer must be separated as far as the frequencies it receives are concerned, i. It must only be fed with low frequencies (bass). To ensure that this is the case, select LP and use the crossover frequency control to adjust the upper frequency to between 40 Hz and 160 Hz. This ensures that every subwoofer is optimally separated as far as the frequencies it receives are concerned. If HP is selected, you can use the associated crossover frequency control to adjust the lower cut-off frequency to between 40 Hz and 600 Hz. [. . . ] Next, continue making your adjustments as described in point 2 onwards. If you want to precisely optimise the acoustic settings of the crossover, we recommend you obtain advice from a Velocity dealer. It is very important that you take into account the specifications of the loudspeakers being used whilst you are adjusting the crossover. BASS BOOST You can adjust the bass output of the Velocity amplifier using the bass boost control. [. . . ]