• Audiophile quality Class A/B output stage.
• Linear power supply with a hefty toroidal transformer and plenty of filtering.
• Designed to sound great with every speaker and all types of music.
• Great choice to power your surrounds or a new set of Dolby Atmos height speakers.
The BasX A4 is a four-channel power amplifier that delivers 100 watts/channel into 8 Ohms and 130 watts/channel into 4 Ohms, all channels are driven, with a rated THD+N of <0.02%, and an A-weighted S/N ratio of 115 db. The BasX A4 features a heavy-duty linear power supply, high-quality Class A/B amplification, transparent fault protection, and a trigger input and output. High-quality industry standard unbalanced RCA inputs enable the BasX A4 to be used with almost any preamp or processor and audiophile-grade five-way speaker terminals accept banana plugs, spade lugs, or bare wire. These features combine to enable the BasX A4 to deliver true audiophile performance and sound quality at an amazingly affordable price.
The BasX A4 is the perfect solution if you need a high-quality amp to power your Dolby Atmos and DTS:X height channels. It is also an excellent choice to power your surrounds if you're building a new system and you've already committed to a more powerful amp, like Emotiva’s XPA-3, to power your front channels or power two pairs of zone speakers.
Size and Weight
Dimensions (WxHxD) 432mm x 102mm x 394mm
Weight 11.79kg
Audio Specifications
Power Output (ALL channels driven) 100 watts RMS per channel; 20 Hz – 20 kHz; THD <0.1%; into 8 Ohms
130 watts RMS per channel; 1 kHz; THD <1%; into 4 Ohms
Power Output (two channels driven) 100 watts RMS per channel; into 8 Ohms
175 watts RMS per channel; into 4 Ohms
Power Bandwidth (at rated power; 8 Ohm load) 20 Hz to 20 kHz (+ / – 0.02 dB)
Broad Band Frequency Response 10 Hz to 80 kHz +0/-1.8 dB
THD + noise <0.02% (A-weighted); ref rated power
Signal to Noise Ratio (8 Ohm load) >115 dB; ref rated power; (A-weighted)
Minimum Recommended Load Impedance (per channel) 4 Ohms (equals one 4 Ohm load or two paralleled 8 Ohm loads)
Damping Factor (8 Ohm load) >500
Input Sensitivity (for rated power; 8 Ohm load) 1.2 V
Gain 29 dB
Input Impedance 27 kOhms
Input and Output Connections
Input Connection Unbalanced (RCA); one each per channel
Speaker Output Connections Audiophile grade 5-way binding posts
Trigger 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
Power Requirement 115 VAC or 230 VAC @ 50 / 60 Hz (automatically detected)
Front Panel Controls and Indicators
Standby Push button
Status LED One per channel; blue
Status LED Change to red to indicate a fault condition
Standby LED Amber
Rear Panel Controls
AC Power switch Rocker switch (switches AC main power)
Status LEDs switch Disables front panel Status LEDs
Mechanical
Protection The BasX A4 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions
