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19 maj 2017 · I have made headphone amps with good 'audio' FET input op amps wrapping 100 MHz DSL driver cfa op amps. the composite multiloop feedback linear stability is much easier to design with the output much faster than the input op amp.
7 sty 2021 · The LM4562 sitting in the A07 and the BB opa2604 sitting in the preamp output stage. I also used a pair of Mullards 5654 8100 valves instead of the Jan 5654 stock that came with the T6 pro which can be a little bright at the top end but the Mullards are like the opa2604, nice and thick sounding with a strong low end.
7 sty 2021 · We have now SINAD = 88dB at 5W/4ohm/1kHz and @24kHz BW. So considering NE5532, LM4562 and OPA2134, OPA2134 gives best measured results in AIYIMA A07. And it is a JFET opamp, which is always preferred by myself in the positions where slightly higher voltage noise of the opamp is negligible, like here.
23 lut 2019 · AIYIMA A07 TPA3255 Amplifier Measurements LM4562 option. I received my A07 yesterday, on January 6, 2021, shipped from Italy. Purchased at Amazon.de and as stated on their website, it arrived without a power supply. I am testing the A07 with 2 different power supplies.
30 sty 2004 · The LME49720 output stage is optimized for supply voltages under +-17 volts. The LME49860 is optimized for +-14.5 to 22 volts. The LM4562 is similar to the LME49720 except it's in a metal case and has better heat dissipation and drives 600 ohms effortlessly.
17 paź 2014 · Today I changed one of the op amp chips in one of my remaining DIY ESP P06's from an LM833 to an LM4562 making both op amp chips LM4562's. It really is a very fine sounding dual op amp if not the most 'musical', yet endearing in its own way.
The combination of OPA1656 as U1 and LM4562 as U2 gave the lowest measured noise, but there was a negligible audible difference when the LM4562 was replaced by a NE5532. The circuit with the values shown in the linked article (but without the High and Low resistors and without the 1K input resistor):
