ZAPCO ST-X Class AB Series - ST-4X DSP III

The Zapco ST-4X DSP III 4-channel DSP amplifier from the  ST-X Class AB Series is a powerful Class-AB stereo amplifier with 4x 90 watts RMS at 2 ohms and built-in 8-channel DSP. It has both a high-level and low-level input via RCA. 

The new ST-X III DSP amplifiers are the first to receive the new brushed aluminum studio housing with thermally controlled fan cooling.  They feature enhanced high-speed digital signal processing (96kHz) for 8 channels to provide processed channels for an additional bass amplifier with the 6X DSP and for two external amplifiers with the 4X DSP.

They feature analog input level controls with clip lights for the most precise adjustment of the input gain. You have  via inputs for optical inputs for digital SPDIF signals, as well as a Zapco Comm Port for connecting the optional Zapco HD-BT module for high-resolution AptX Bluetooth music streaming.

• 4-channel, full range, class A/B
  
• New aluminum housing
• On-board, full function, 8-channel digital signal processing
  
• High-pass and low-pass filters, phase control, signal delay and 15 channels of parametric equalization on each channel
  
• Optical digital input
  
• BT streaming: Bluetooth connection for external APTX HD module (optional)
  
• Analog input gain controls

• Power @ 4Ω: 4 x 65 Watt
  
• Distortion factor at rated power < 0.5% Distortion factor
  
• Power @ 2Ω: 4 x 90 Watt
  
• Power bridged @ 4Ω: 2 x 180W RMS
  
• signal-to-noise ratio > 90dB
  
• THD + Noise < 0.2%
  
• channel separation >60dB
  
• Frequency response 15Hz to 30KHz ±1dB
  
• Dimensions in mm: 160(W) x 57(H) x 309(L)