– High/Low Pass Filters one per pair of channels – 30Hz to 400Hz per Octave) – Signal to Noise Ratio: CEA 2006 S/N Ratio (IHF A Weighted, Reference: 1W into 4„¦) 98 dBA – equivalent to 122dB on rated power – Frequency response 5Hz – 100kHz / 0dB to -3dB (Reference: 1W into 4 Ohms) – Bass remote control ready control knob is an accessory – Adjustable input sensitivity: 0.2V to 4.0V – High cable diameter speaker connection plug and socket system for speakers, as well Power Terminals with Allen headed grub screw bare wire socket connection on quick-connect system – Adjustment controls hidden under a metal plate with Allen headed retainer bolt – Aluminium panel heatsink with stack system for stacking also customisable trim rings – Variable high- and low-pass filters (30-400 Hz, 12dB/octave) – Stackable installation design with front-panel controls – 4 x 100w RMS 2 Ohms NB: The same as 4 Ohms Not in the American way, as in ‘That burger was awesome!’ And that meant in a truly British way to indicate something more than merely very good. It has specs that mean it aughta be all the way into awesome. For it isn’t claimed to be merely ‘good’. It is also reckoned to be a tour-de-force once-every decade grade big fat step forwards in this type of amplifier’s design. It isn’t just smarter and prettier and skinnier. Many Alpine buyers do not, so it is an optional accessory you ain’t paying for in the amp’s affordable price.Īnd that’s what has got this reviewer erect, as if one is to accept the entirety of Alpine’s techno-speak, then this is one special development. Very neat and tidy, the bass ones can also have an accessory remote bass volume knob to mess about with if you like that. You could simply unplug and replace a single four channeler like this one for a six channel design and add two speaker wires, then stack a mono one on top of it for bass use. The power and ground/trigger wire connector is also on such a system, so if you avail yourself of the customisable colour rings, then you can change the amp easily without undoing and then re-doing your wiring for cosmetic reasons. It can of course be bridged but it is an unusual design in that as well as its great compactness, it also uses the cunning quick release speaker plug system Alpine introduced on the first generation. This is the four channel PDX-F4 model and sports four lots of one hundred watts at both four and two Ohm impedances. These are 20% skinnier than the first lot and like them, can be stacked with an optional kit so you can have a solid wedge of power in a tiny space in your car. A second generation of the PDX or Power Density amplifier concept.
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