ZAPCO ST-X Class D Series - ST-1000XM III

The Zapco ST-1000XM III 1-channel bass amplifier from the ST-X Class D Series is part of a series of  four Class D mono bass amplifiers, which have a power of 400  Watt RMS to 2,000 Watt RMS. All Studio XM amplifiers can also be connected to a single voice coil, so you can double your power at any time by simply connecting to another amplifier of the same model via the link function. The  ST-1000XM III 1-channel amplifier has an output of 1000 watts RMS at 1 ohm. On the connection front there are settings for the crossover and bass boost. The  ST-1000XM 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 needed.
• 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 is wasting 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 control - A bass cabinet that is directed forward sounds different than if  you point it backwards. In both cases, changing the phase of the subwoofer makes a difference. In addition, the ST-XM phase control is variable from 0° to 180°, so you can set the exact phase ratio that works best in your car.

• 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 1000 Watt RMS
  
• THD @ rated power < 0.2%THD
  
• Power @ 2Ω: 1 x 700 Watt  RMS
  
• Power @ 4Ω: 1 x 500 Watt  RMS
  
• Signal-to-noise ratio > 100dB
  
• THD + Noise < 0.1%
  
• efficiency > 85%
  
• Frequency response 10Hz to 200Hz ±1dB
  
• Input sensitivity .25v to 5v
  
• Dimensions in mm: 160(W) x 58(H) x 325(L)