Heavy-duty linear power supply delivers stable, high current for demanding speakers
Class AB amplification provides smooth, detailed sound with natural imaging
Audiophile-grade five-way speaker terminals accept banana plugs, spade lugs, or bare wire for flexible installation
Transparent fault protection ensures system safety without affecting audio quality
Remote trigger input and output enable integration with other audio equipment
Summarized by Shop
The BasX A1 is a monoblock amplifier ideal for driving dedicated power to your most important speakers. Use the A1 as the foundation for a high-performance stereo system or to give every speaker in your system the ultimate assurance of pure channel isolation.
Power Output
200 W RMS (8 ohms), 325 W RMS (4 ohms)
THD+N
0.02%
Signal-to-Noise Ratio (A-weighted)
112 dB (8 ohms)
Frequency Response
20 Hz–20 kHz (8 ohms), 5 Hz–80 kHz (4 ohms)
Input
Unbalanced RCA
Speaker Terminals
Five-way binding posts (banana plugs, spade lugs, or bare wire)
Power Supply
115 VAC or 230 VAC, 50/60 Hz
Dimensions
17 in W x 4 in H x 15.5 in D (not including connectors)
Weight
22 lbs (unboxed), 30 lbs (boxed)
Summarized by Shop
4.2
10 ratings
5
4
3
2
1
Impressive
D
Daniel · April 29, 2026
Downgrade Fears Forgotten
My almost 18 year-old Gen 1 XPA-5 was starting to have technical issues and I decided it was time to replace it. I considered a new XPA-5, but I was only driving 4 overheads and my center on my Gen 1 (long story, my setup changed drastically since first buying my XPA-5). After exploring my options (including other brands), I decided to go with an A1 for my center and an A4 to drive my overheads. I feared this would be a downgrade. But upon firing up the new amps and initially setting the levels, a necessary step as the XPA-5 Gen 1 was 32 db gain, I popped on a movie to test the new gear. I was speechless at how much more cohesive the overall sound was with the A1/A4 combo matched with my Emotiva RPA-2 (Emotiva's 2008'ish Reference stereo amp) and an A300 driving my surrounds. And what a match it is! The XPA-5 apparently was much more dynamic (as it's reputation deems), and I am realizing now that it was overpowering the rest of my system, particularly the center channel. I constantly was adjusting the volume up and down with the Gen 1 for as long as I can remember. Now everything is much more balanced, and because of that evcerything sounds cleaner, and dialogue is more intelligible. Throughout this process I was half expecting that I'd be sending the new amps back and end up getting another XPA-5 after all was said is done. No chance on that now that I've gotten a taste of the new gear. I'm extremely happy with my purchase decision!
J
John · February 21, 2026
Awesome!
I purchased the BasX A1 Monoblock Power Amplifiers. Paired them with my seven-year-old 2. 5-way, 6 ohms impedance speakers. The speakers were previously powered by a 275 wpc (8 ohms), 400 wpc (4 ohms), 2 channel power amplifier. The sound quality of the speakers with BasX A1 Monoblock power was awakened and they are now in BEAST mode! So much so that, I was considering upgrading to next level speakers but put that on pause. The construction, aesthetics, and PERFORMANCE of the BasX A1 Monoblocks are exceptional. I enjoy music at much lower volumes and use my subwoofer sparingly. The BasX A1 Monoblocks are Awesome! Anthony