ZAPCO ST-X Class D Series - ST-500XM III

The Zapco ST-500XM III 1-channel bass amplifier from the ST-X Class D Series is part of a series of  four mono Class D bass amplifiers, which reach a power output of 400 watts RMS to 2,000 watts RMS. All Studio XM amplifiers can also be connected to a single voice coil, so that you can double your power at any time by simply connecting it to another amplifier of the same model via the link function. The  ST- 500XM III  1-channel amplifier has an output of 400 watts RMS at 1 ohm. On the connection front there are settings for the crossover and bass boost. The  ST- 500XM III  comes with a bass remote control.

• Bass Remote Control - All ST-X amplifiers come with a remote control that allows you to instantly change the bass output if required  can.
• Input sensitivity control (Gain) - Adjusts the sensitivity between 200 mV and over 5 volts.
• Mono Bridge Out and Bridge In - These allow two amplifiers to be connected together (strapping). When the Bridge Out RCA of the main amplifier is connected to the Bridge RCA In of the slave amplifier, the main amplifier (Out) has priority in control. 
• Low-pass crossover - All ST-XM amplifiers are designed as bass amplifiers and feature a full-featured low-pass crossover that is adjustable from 40 to 180 Hz.
• Sub Sonic (HP) Filter - The reproduction of frequencies below those that  you want to hear,  wasted amplifier power. The sub-sonic filter helps to save this energy for the frequencies. More importantly, frequencies below the allowable range of the  subwoofer,  the  subwoofer  can quickly destroy. This is especially important for cases with ports. 
• Bass Boost Control - All ST-XM amplifiers feature a variable bass boost from 0 dB to 12 dB.
• Bass frequency control - The bass reproduction of a  subwoofer  is different in every car, so a bass boost at 50 Hz may be great in one car but useless in another. With the ST-X Bass Frequency control  you can   Set the bass boost to any frequency between 30 Hz and 80 Hz so that you can precisely tune it to the music in the car.
• phase controller -  A  Bass cabinet, which is  sounds different than if  In both cases it makes a difference if the phase of the  subwoofer. In addition, the ST-XM phase control is variable from 0° to 180°, so that  man  can set the exact phase ratio that  in your  car works best.

• Single-channel Class D bass amplifier
• New aluminum housing
• Variable input gain control
• Variable electronic crossover
• Variable subsonic filter
• Variable control for bass boost
• Variable center frequency for bass boost
• Variable phase control
• Strap-on for use with two amplifiers on a single voice coil
• Incl.bass remote control

• Power @ 1Ω: 1 x 400 Watt RMS (Maximum 500 Watt)
  
• THD @ rated power < 0.2%THD
  
• Power @ 2Ω: 1 x 300 Watt  RMS
  
• Power @ 4Ω: 1 x 200 Watt  RMS
  
• Signal-to-noise ratio > 85dB
  
• THD + Noise < 0.2%
  
• efficiency > 85%
  
• Frequency response 10Hz to 200Hz ±1dB
  
• Input sensitivity .25v to 5v
  
• Dimensions in mm: 160(W) x 58(H) x 225(L)