ZAPCO ST Class AB Series - ST-4B

The ST-B series amplifiers, which include the Zapco  ST-4B 4-Channel Amplifier Class AB amplifiers offer legendary sound quality and reliability at a price that everyone can afford. The  Zapco  ST-4B 4 -Channel amplifier delivers an output of 4x90 watts RMS at 2 ohms. 

Sound quality is always the most important factor in ZAPCO projects. The STUDIO line also incorporates other factors that make the amplifiers more user-friendly for everyday use. The extruded aluminum enclosures are more compact and lightweight, making them easier to fit into today's smaller cars. The feature set offers the system versatility you need - we have a complete set of crossovers and signal outputs for additional amplifiers. Power, price, size and performance.

• 4-channel, Class-AB full-range amplifier
  
• Stable at 4 Ohm bridged or 2 Ohm stereo load
  
• MOSFET power supply
  
• RCA and OEM speaker input
  
• Variable input gain control
  
• Variable electronic crossover FULL / LP / HP
  
• Variable bass boost

• Power @ 4Ω: 4 x 65 Watt RMS
  
• Power @ 2Ω: 4 x 90 Watt RMS
  
• Power @ 4Ω bridged: 2 x 180 Watt RMS
  
• Distortion factor at rated power < 0.2%
  
• Signal-to-noise ratio > 97dB
  
• channel separation > 45dB
  
• Frequency response 20Hz to 20,000Hz ±1dB
  
• Input sensitivity .25v to 5v
  
• Dimensions in mm: 182(W) x 52(H) x 310(L)