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supermanrob 1.6K Views
Dec 31, 2025 4:31 PM

BasX A5 Five-Channel Power Amplifier $529

$529

$649

18% off
Emotiva
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This is pretty decent sale for a good external amp ime.
Don't let the numbers fool you, it provides solid clean power for 5 channels.
Ime in many cases it can easily rival the usual 11 channels AVRs sonically.
Especially if your AVR has preamp mode.
For the spec people here they are.

BTW they also have the 11 channel for $979 is pretty good also.

Circuit Topology

The BasX A5 is a five channel power amplifier. The BasX A5 combines classical audiophile amplifier architecture, based on a heavy-duty linear power supply, and a carefully designed high current short signal path Class A/B output stage, with advanced microprocessor-controlled monitoring and protection circuitry, to deliver superb sound quality at a truly reasonable price.

Audio Specifications

Power Output (ALL channels driven):

• 95 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):


• 120 watts RMS per channel; into 8 Ohms


• 175 watts RMS per channel; into 4 Ohms

Power Bandwidth (at rated power; 4 Ohm - 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):
> 116 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 Connections: 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

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

Protection

The BasX A5 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.

Dimensions:

• 17" wide x 4" high x 15-1/2" deep (unboxed, not including connectors)

Weight:
• 26.5 lbs (unboxed)
• 33 lbs (boxed)

https://emotiva.com/products/basx...-amplifier
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Deal Details
Community Notes
About the Poster
This is pretty decent sale for a good external amp ime.
Don't let the numbers fool you, it provides solid clean power for 5 channels.
Ime in many cases it can easily rival the usual 11 channels AVRs sonically.
Especially if your AVR has preamp mode.
For the spec people here they are.

BTW they also have the 11 channel for $979 is pretty good also.

Circuit Topology

The BasX A5 is a five channel power amplifier. The BasX A5 combines classical audiophile amplifier architecture, based on a heavy-duty linear power supply, and a carefully designed high current short signal path Class A/B output stage, with advanced microprocessor-controlled monitoring and protection circuitry, to deliver superb sound quality at a truly reasonable price.

Audio Specifications

Power Output (ALL channels driven):

• 95 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):


• 120 watts RMS per channel; into 8 Ohms


• 175 watts RMS per channel; into 4 Ohms

Power Bandwidth (at rated power; 4 Ohm - 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):
> 116 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 Connections: 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

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

Protection

The BasX A5 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.

Dimensions:

• 17" wide x 4" high x 15-1/2" deep (unboxed, not including connectors)

Weight:
• 26.5 lbs (unboxed)
• 33 lbs (boxed)

https://emotiva.com/products/basx...-amplifier

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3 Comments

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Dec 31, 2025 9:31 PM
38 Comments
Joined Jul 2020
NavySnail3582Dec 31, 2025 9:31 PM
38 Comments
What does this mean: "Ime in many cases it can easily rival the usual 11 channels AVRs sonically."? I assume people paying $500 for an external amp that they use with preouts would be expecting a sound upgrade not just a rival, which almost sounds like it's a small downgrade. I've been considering buying an external amp to power the front three with my Onkyo RZ50 (currently hooked to Focal Chora 826 and Chora center) but I don't listen loud so it seems like it's probably not worth the money.
Original Poster
Jan 1, 2026 3:24 AM
13.4K Comments
Joined Jul 2010
supermanrob
Original Poster
Jan 1, 2026 3:24 AM
13.4K Comments
Quote from NavySnail3582 View quoted comment :
What does this mean: "Ime in many cases it can easily rival the usual 11 channels AVRs sonically."? I assume people paying $500 for an external amp that they use with preouts would be expecting a sound upgrade not just a rival, which almost sounds like it's a small downgrade. I've been considering buying an external amp to power the front three with my Onkyo RZ50 (currently hooked to Focal Chora 826 and Chora center) but I don't listen loud so it seems like it's probably not worth the money.
Yes take for instance the RZ50.
People often say the RZ70 is sonically better because of its power supply.
You don't have to spend $1800+ to get it. Adding this to the RZ50 likely will "rival"(upgrade) to that advantage.

If you're looking at this to improve your sonics, very unlikely this will do much with that.
I would suggest to double check your setup implementation, bass management & subwoofer implementation.

I would also suggest following this video on the Dirac calibration process.
https://m.youtube.com/watch?v=gjWZUZ1MeDg
Jan 2, 2026 4:07 AM
9 Comments
Joined Aug 2024
CalmKite8997Jan 2, 2026 4:07 AM
9 Comments
Quote from NavySnail3582 View quoted comment :
What does this mean: "Ime in many cases it can easily rival the usual 11 channels AVRs sonically."? I assume people paying $500 for an external amp that they use with preouts would be expecting a sound upgrade not just a rival, which almost sounds like it's a small downgrade. I've been considering buying an external amp to power the front three with my Onkyo RZ50 (currently hooked to Focal Chora 826 and Chora center) but I don't listen loud so it seems like it's probably not worth the money.
It's about RMS vs your Z50 is 120w X 2 RMS all channels driven would be 30-40w RMS max. About playing it loud or not, having more power, any speakers will magically sound better than under power.
Last edited by CalmKite8997 January 1, 2026 at 08:09 PM.

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