This is a review and detailed measurements of the Buckeye Purifi 1ET9040BA (second generation?) monoblock amplifier. It was kindly drop shipped by a company and costs US $1,295.
A single LED adorns the front indicating power on, protection or fault condition. Back panel has all that one would need for balanced operation:
Gain settings are well chosen and inclusion of trigger input for automatic turn on via the source is appreciated.
Buckeye Purifi 1ET9040BA Amplifier Measurements
Let's start with the low gain setting and see what we get:
What we get is a big smile on my face!
Distortion clocking below -130 dB which is hugely below threshold of hearing. Noise as a result sets SINAD to an excellent 110.6 dB, easily landing the unit in our top 20 amps:
Medium and high gain given you the ability to reach full power with more reasonable input voltages but costs you some SNR and hence SINAD:
Staying with low and medium gains, we see state of the art measurements at full power:
Vanishingly low distortion remains even at highest frequencies at 5 watts:
Class D amps can suffer from load dependency but not here:
Impedance does not change even up to 100 kHz measurement point!
Story gets even brighter when we consider how much power this lightweight and cool running amp can produce:
Company specs the amp at 2 ohm so I ran that test as well:
Wow!
Even into 8 ohm we have more power than many amps produce at 4 ohm:
Muscular power output extends down to 40 Hz, climbing to highest wattage I have measured:
Higher frequencies tend to give class D amps a hard time but not so much here:
Amp is very quiet on power on but may have some noise on power off:
And it is stable on power on:
Conclusions
Conventional wisdom says you can have lots of power or finesse. The Buckeye 1ET9040BA tears up that rule and flushes it down the toilet. It has incredibly low noise and distortion, especially at lower gain settings, but also produces copious amount of power, courtesy of its new power supply and capable Purifi amplifier modules. All this in a very cool running package, with features you want at a price that is hard to fathom just a few years ago.
It is my pleasure to recommend the Buckeye 1ET9040BA monoblock amplifier.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
A single LED adorns the front indicating power on, protection or fault condition. Back panel has all that one would need for balanced operation:
Gain settings are well chosen and inclusion of trigger input for automatic turn on via the source is appreciated.
Buckeye Purifi 1ET9040BA Amplifier Measurements
Let's start with the low gain setting and see what we get:
What we get is a big smile on my face!
Distortion clocking below -130 dB which is hugely below threshold of hearing. Noise as a result sets SINAD to an excellent 110.6 dB, easily landing the unit in our top 20 amps:Medium and high gain given you the ability to reach full power with more reasonable input voltages but costs you some SNR and hence SINAD:
Staying with low and medium gains, we see state of the art measurements at full power:
Vanishingly low distortion remains even at highest frequencies at 5 watts:
Class D amps can suffer from load dependency but not here:
Impedance does not change even up to 100 kHz measurement point!
Story gets even brighter when we consider how much power this lightweight and cool running amp can produce:
Company specs the amp at 2 ohm so I ran that test as well:
Wow!
Even into 8 ohm we have more power than many amps produce at 4 ohm:
Muscular power output extends down to 40 Hz, climbing to highest wattage I have measured:
Higher frequencies tend to give class D amps a hard time but not so much here:
Amp is very quiet on power on but may have some noise on power off:
And it is stable on power on:
Conclusions
Conventional wisdom says you can have lots of power or finesse. The Buckeye 1ET9040BA tears up that rule and flushes it down the toilet. It has incredibly low noise and distortion, especially at lower gain settings, but also produces copious amount of power, courtesy of its new power supply and capable Purifi amplifier modules. All this in a very cool running package, with features you want at a price that is hard to fathom just a few years ago.
It is my pleasure to recommend the Buckeye 1ET9040BA monoblock amplifier.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
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