[cello]

Just got finished building a Meta42 with the following specs:
- 2 OPA134 with Burr-Brown adaptor
- 100K radioshack pot
- R3: 470
- R4: 2K
- R5: 1K
- R6: 100K
- R7: 1K
- R8, R9: Jumped

The issue I'm having is that the high-end sounds somewhat tinny, at times painfully so. Like, for example, cymbal crashes can be somewhat tinny and painful sounding. The low-end is also a bit bassy, but in general is not that bad —_what I'm really mostly worried about is the high-end. I'm using the amp with a pair of HP890s.

 

[Voodoochile]

What value did you use for R2? With that pot you will want to use a 909k to 1meg resistor.

Also, R7 is way too high... maybe 100 ohms would be a better choice.
Not familiar with your cans, but if they are low-z, then maybe stick a 25 to 47ohm resistor in R9.

 

[AlphaHX]

dunno about the amp but last tiem i check the philips hp890 was supposed to be a bright sounding headphone. that could be causing the "painful" highs. dont know if thats urs issue... but it was just an possibility taht came to my mind. gluck fixing ur problem...

 

[MegaMeee]

yeah get new headphones no point using the hp890's with an amp... imo they are just ordinary, harsh highs muddy lows and generally hollow sounding.