Thank you very much for the feedback and advices. As you mentioned I'll try to adjusting the pick-up height. I was doing that some time ago, but maybe I should experiment with it a bit more.
As for the compressor I'll think about the Empress but unfortunately it's not available in any store in my country and I wanted to buy it locally.
I wanted to ask you about MXR M87 compressor. On the internet I found information that this compressor breaks down quite often. Is it true? Did you have any problems with it?
matante said:
What kind of strings do you use and how old are they?
Currently I use D'Addario XL nickel wound (40-125). They are more than a year old. I know I should go to jail for playing on such old strings, but these samples that I uploaded were recorded long time ago (for sure on more fresh strings

. Sometimes I also use Ernie Ball Super Slinky (40-125). However, this problem occurred regardless of what strings were on and whether they were new or old.
lan774 said:
It doesn’t sound too obvious on those recordings. If it is more obvious live, could it be your amp lacking?
I don't think it's amp. I have played on three different amps and that problem occured on every of them. Also, when I played another guitar on one of them, the sound was full and homogenous.
themickster said:
Have you tried the tone settings on the head? That might be where you're losing top end.
AndyLES said:
2) Check your EQ and monitoring settings (EQ with your ears, not your eyes - and remember that Midrange Is The Money)
I have Ashdown MK 500 Mark King signature with grafic EQ. I haven't experimented too much with the sound. I have slightly boosted lower and upper frequencies and a slightly pulled down mids. But I tried different settings on my previous amp and couldn't achieve what I wanted. When I boosted mid frequencies so that the upper strings had enough, then the lower strings had too much. And as I write before I played on another guitar on Ashdown and There was no problem with lack of tones.
pbass2 said:
If you can't get there with your hands and your bass, then throwing a compressor at the issue is only going to hold you back from improving your technique.
Look at how many of the the top sessions cats have a stompbox compressor in their signal chain. Few.
Get your bass set up and dialed as others explain above, and start working on your dynamics and control with your hands. Then if compression on the bass is needed in the mix, have at it.
I agree that proper technique is a very important thing, but when you play gently with your fingers and wanted add some slaps then the volume difference will be too big to be compensated by the appropriate technique.
Rip Van Dan said:
What sounded obvious on those recordings was that they second one was played with a pick and thus had a lot more attack on the notes that finger style does. If you want to make playing with a pick sound like playing finger style, you don't need a compressor. You just need one of those thick felt picks that I used to hate when I played bass with a pick back in the 60's. They produce about the same amount of attack on the note as playing finger style does. The thicker the felt, the less attack on the note is produced.
Actually both of the samples were played with fingers. Really

Maybe such picks you mentioned would be good idea, but what with slapping?
S.F.Sorrow said:
With your current settings I actually think a high pass filter will be more appropriate if you want a more balanced tone across the strings. Then if you add a compressor after the HPF (if you still think it's necessary) it won't overshoot as much on lower notes.
Maybe this would help. Thanks
Perhaps it's time to look for a different type of bass? Something tested and tried that will sit nicely in the mix and cut through in all the right places, like a passive P-bass.
Maybe but I thing that a p-bass it's not for me. It's not a type of sound I'm looking for.