This is my version of LM1875 inverting mode. Tested by several friend in group Facebook called "DIY Audio Indonesia". But I can not share the PCB layout, because I did not make it, my fried did it.
First version, it do not use DC Offset adjustment. The DC offset is not consistent, sometime low, sometime high. (May be depend on op-amp quality).
Please do not ask how it sound to me, because I did not build it 😀
According to who built it, the mid and high frequency is better than non inverting mode.
First version, it do not use DC Offset adjustment. The DC offset is not consistent, sometime low, sometime high. (May be depend on op-amp quality).
Please do not ask how it sound to me, because I did not build it 😀
According to who built it, the mid and high frequency is better than non inverting mode.
I've been needing an inverting LM675 design. It would be very low gain, and I think that might cover for its lack of bias. It would also be quite efficient.
You can use my design for LM675. The datasheet LM675 look like LM1875. Same pinout and package, same power supply range, compensated at minimum gain 10x, etc.
The regulator circuit is actually +/- 12 volts for the 5532s. Otherwise, it shows nice attention to detail.
Yes, with lower distortion. Using low value of input impedance, give lower noise. But, not many op-amp can drive 680 Ohm load with low enough distortion.
Other answer, sounds fantastic, linear, like a really expensive product.
Never mind that it doesn't cost much to do that.
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