I have finished My amplifier with 2 Holton Hpa-NXL 200 R4.2 modules.
HPA-NXL200 R4.2 - Advanced Version Amplifier – Holton Precision Audio
I don't know if there is some issue with the modules because they aren't very linear.
I have measured 40Hz/4vpp, 1kHz/4vpp, 10kHz/4.3vpp, 20kHz/5.3vpp with the same input level.
A square wave signal has a front raising peak both positive and negative.
Lower trace is input, upper trace is output.
BR
Tonny Jensen
HPA-NXL200 R4.2 - Advanced Version Amplifier – Holton Precision Audio
I don't know if there is some issue with the modules because they aren't very linear.
I have measured 40Hz/4vpp, 1kHz/4vpp, 10kHz/4.3vpp, 20kHz/5.3vpp with the same input level.
A square wave signal has a front raising peak both positive and negative.
Lower trace is input, upper trace is output.
BR
Tonny Jensen
I cant talk anything about this issue, it can be normally with lateral mosfets.
With N Channel Switching Mosfets in Output stage + 12 V additional rail for driver, I dont have this issue, everything looks perfect
but amps can sound perfect
Thank you for the answers.
The amp does actually sound great. It is open and dynamic and has very well controlled bass.
I still wonder why the amplitude is raising with frq.
I have contacted Holton and he gave me a few things to check, which I will do as soon as I get the time to do it.
Tonny.
The amp does actually sound great. It is open and dynamic and has very well controlled bass.
I still wonder why the amplitude is raising with frq.
I have contacted Holton and he gave me a few things to check, which I will do as soon as I get the time to do it.
Tonny.
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