BasX A800 Emotiva Multi-Zone 8 Channel Power Amplifier

Circuit Topology

• The BasX A-800 is an eight channel power amplifier, specifically designed for use in multi-zone and whole home applications.
• Each individual amplifier channel features a carefully designed high current, short signal path, Class A/B output stage, with advanced microprocessor-controlled monitoring and protection circuitry.
• The eight amplifier channels in the A-800 are arranged to provide the absolute maximum in terms of flexibility: each channel may be used separately, or as part of a stereo pair; each stereo pair may be supplied with its own input signal, or receive its signal from a common stereo input bus; and each pair of channels may optionally be bridged into a single channel with higher power (for a total of four bridged high-powered channels).

Audio Specifications

• Power Output (two channels driven):
  50 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.03%; into 8 Ohms.
  80 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.1%; into 4 Ohms.
• Power Output (8 channels; all channels driven):
  30 watts RMS per channel; 1 kHz; THD < 0.03%; into 8 Ohms.
  50 watts RMS per channel; 1 kHz; THD < 0.1%; into 4 Ohms.
• Power Output; BRIDGED MODE (4 channels; all channels driven):
  100 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.03%; into 8 Ohms.
• Broad Band Frequency Response
  Individual channel mode: 20 Hz to 80 kHz (+ / – 1.8 dB).
  Bridged mode: 20 Hz to 80 kHz (+ / – 3 dB).
• THD + noise: < 0.05% (A-weighted); ref rated power; 1 kHz; 8 Ohms.
• Signal to Noise Ratio (8 Ohm load):
  > 110 dB; ref rated power; (A-weighted).
  > 95 dB; ref 1 watt; (A-weighted).
• Minimum Recommended Load Impedance (per channel)
  Individual channel mode: 4 Ohms.
  Bridged mode: 8 Ohms.
• Damping Factor (8 Ohm load): > 500.
• Input Sensitivity (for rated power; 8 Ohm load): 700 mV (0.7V).
• Gain
  Individual channel mode: 29 dB.
  Bridged mode: 35 dB.
• Input Impedance: 27 kOhms.

Input And Output Connections

• Input Connections:
  Unbalanced (RCA); one each per channel.
  Unbalanced (RCA); one pair for Bus Input.
• Speaker Output Connections: Audiophile grade 5-way binding posts.
• Trigger:
  BasX A-800 may be configured to be turned on manually, or by a trigger signal from a pre amp or processor, or to turn on automatically when it senses an audio signal on any of its inputs.
  Manual Trigger Input: 5 – 12 V (AC or DC); <10 mA input current required.
  Trigger Output: 12 VDC; can drive any load up to 120 mA.

Power Requirements

• 115 VAC or 230 VAC @ 50 / 60 Hz (automatically detected).

Front Panel Controls and Indicators

• Standby: push button (halo ring changes color to indicate Standby or On).
• Status LEDs: one per channel; blue.
  Status LEDs change to red to indicate a fault condition.

Rear Panel Controls

• AC Power Switch; rocker switch (switches AC main power).
• Power Mode; slide switch; selects Always On, Trigger, or Auto-On Mode.
• Bus Switch; slide switch; (4) 1 per Zone;
  selects either the Bus or individual input for the Zone.
• Bridge Switch; selects either individual channel or bridged amplifier operation.
• Status LEDs switch; disables front panel Status LEDs.

Protection

• The BasX A-800 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.