This tester can power up by a DC-12V to 15V power supply, with 500mA or higher rating. 12V Power supply included.
This automatic tester can test the following items:

Pre-amplifier, power amplifier, integrated amplifier, MC/ MM phono stage, CD player, DAC, music server, equalizer, active crossover, speaker system, active speaker, signal cables, passive filter networks....and many more.
Advantage : Light weight, compact, low cost, very simple to use, no calibrations needed , clear back light full color TFT graphic display , only control by three buttons, DC 12V input which can use car battery / AC adapter / USB to 12V converter cable to power up, so that it can perform testing almost anywhere, especially suitable for quick and simple field testing..
RIAA accuracy testing: (20hz ~ 20Khz) for MM phono stage
This tester can test and compare the flatness of the RIAA equalization curve of a phono stage and display the result in +/- db.

Frequency response testing: (5Hz ~ 300Khz) for pre-amp, power amp, buffer amp, cable and speakers.

With the built-in artificial intelligent algorithm, it will automatic sweep frequency from 5Hz to 300Khz, check out and display -3db low and high frequency roll-off points. You can use this mode to test the frequency response of any audio equipment including speakers.
Gain Test: (@ 1Khz) for pre-amp and power amp

Simple Signal generator and CRO Testing: (5Hz ~ 300Khz sine) for DAC, music streamer, CD and any line level signal source.

Power amplifier frequency response and gain testing :

Speaker frequency response testing : (external mic is required, built-in mic pre-amp)

1 year free parts and labor warranty, full technical support included.