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Review of

햇병아리 the member of our community kindly purchased it himself with his own money and asked me to measure it.

Common-

AMP at Mode ON (On - Off = plug-in/unplug)

Load 4 Ohms (for power sweep, a pair of 4 x 16 Ohms 1000 W as 4 Ohms 4000 W Load)

AC filters external AUX-0040

DC filters internal

DMM Keysight 34465A Truevolt 6,5 digit

Analyser Audio Precision APx525B

On-Off DC test with 4 Ohm @ Gain Med Ch.1

DC offset as 4.2 mV

Strange DC behavior after unplug(Marker 1). Over 12 Min to return to bottom voltage.

On-Off AC test with 4 Ohm @ Gain Med Ch.1

Peak around 4 mVrms

Stabilised(?) after 32 min from turn ON, bulge around 47 min would be my mistake.

On-Off DC-45k test with 4 Ohm @ Gain Med both Ch.1, Ch.2

On-Off DC-45k test with 4 Ohm @ Gain Low both Ch.1, Ch.2

On-Off DC-45k test with 4 Ohm @ Gain High both Ch.1, Ch.2

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W 20k SINAD 256k Temp 26.9 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W 22.4k SINAD 256k Temp 26.5 Humi 59%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W 40k SINAD 256k Temp 26.7 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Fr Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Gain Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W GD Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Impulse Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Multitone Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm Power sweep Temp 26.8 Humi 54%

*This amplifier fails to repeatedly achieve top power of the right end of this graph.

Drive this amplifier to near 700 W as officially rated can cause serious irreversible damage.

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W 20k SINAD 256k Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W 22.4k SINAD 256k Temp 27 Humi 55%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W 40k SINAD 256k Temp 26.9 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Fr Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Gain Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W GD Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Impulse Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Multitone Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm Power sweep Temp 26.9 Humi 57%

*This amplifier fails to repeatedly achieve top power of the right end of this graph.

Drive this amplifier to near 700 W as officially rated can cause serious irreversible damage.

Important!

For 20 kHz <- Filter had set as 20 -20 kHz so, higher frequency's harmonic distortions are heavily filtered so, THD+N look way finer than real value. So It should be ignored or carefully considered.

Continued on the next post due to image limit up to 35.

### Buckeye Amps

Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!

www.buckeyeamp.com

햇병아리 the member of our community kindly purchased it himself with his own money and asked me to measure it.

Common-

AMP at Mode ON (On - Off = plug-in/unplug)

Load 4 Ohms (for power sweep, a pair of 4 x 16 Ohms 1000 W as 4 Ohms 4000 W Load)

AC filters external AUX-0040

DC filters internal

DMM Keysight 34465A Truevolt 6,5 digit

Analyser Audio Precision APx525B

On-Off DC test with 4 Ohm @ Gain Med Ch.1

DC offset as 4.2 mV

Strange DC behavior after unplug(Marker 1). Over 12 Min to return to bottom voltage.

On-Off AC test with 4 Ohm @ Gain Med Ch.1

Peak around 4 mVrms

Stabilised(?) after 32 min from turn ON, bulge around 47 min would be my mistake.

On-Off DC-45k test with 4 Ohm @ Gain Med both Ch.1, Ch.2

On-Off DC-45k test with 4 Ohm @ Gain Low both Ch.1, Ch.2

On-Off DC-45k test with 4 Ohm @ Gain High both Ch.1, Ch.2

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W 20k SINAD 256k Temp 26.9 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W 22.4k SINAD 256k Temp 26.5 Humi 59%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W 40k SINAD 256k Temp 26.7 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Fr Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Gain Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W GD Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Impulse Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm 5 W Multitone Temp 27.1 Humi 62%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Med 4 Ohm Power sweep Temp 26.8 Humi 54%

*This amplifier fails to repeatedly achieve top power of the right end of this graph.

Drive this amplifier to near 700 W as officially rated can cause serious irreversible damage.

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W 20k SINAD 256k Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W 22.4k SINAD 256k Temp 27 Humi 55%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W 40k SINAD 256k Temp 26.9 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Fr Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Gain Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W GD Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Impulse Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm 5 W Multitone Temp 26.8 Humi 54%

BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Gain Low 4 Ohm Power sweep Temp 26.9 Humi 57%

*This amplifier fails to repeatedly achieve top power of the right end of this graph.

Drive this amplifier to near 700 W as officially rated can cause serious irreversible damage.

Important!

For 20 kHz <- Filter had set as 20 -20 kHz so, higher frequency's harmonic distortions are heavily filtered so, THD+N look way finer than real value. So It should be ignored or carefully considered.

Continued on the next post due to image limit up to 35.