5/27/2023 0 Comments Yamaha ax 592 specsWhich is insufficient for 100W/4ohm amplifier loaded with a complex load like the one used. The amplifier has only one output pair of 2SA1695/2SC4468 devices, The attempt was not successful and the amplifier protection triggered the unit off at 3.4kHz frequency, where the load impedance is 1.275 ohm and -53°, which indicates to mostly capacitive impedance. frequency at 4.6Vrms output voltage, which would be 5W at 50Hz, to the complex load described in this thread Measurements (direct mode, if not stated otherwise)Īn attempt was made to measure distortion vs. As I was measuring in the direct mode, I left the selector just at the CD/DVD position. The amplifier is working and is in quite a good shape, the only serious issue is that the rotary input selector works very badly and one has to turn it many times round and round before it is willing to jump to the next input. That's the reason why it was used for measurements. The “direct” path has considerably lower noise and better S/N, about 15dB, as will be shown later. The amplifier has tone controls and loudness control, both may be bypassed by pushing “CD/DVD direct” button at the front panel and using the CD/DVD input at the rear panel. I have moved the switch to 4 ohm position, as my tests will be performed with 4 ohm load. There is an impedance selector switch on the rear panel to select minimum speaker impedance at A or B output terminals, it has 2 positions – 4 ohm minimum and 6 ohm minimum. It is a class II unit with rated power consumption of 150W/230V.
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