Recent content by sanderx

Somebody correct me if I wrong (I no expert in the area) but isn electrical equipment with input / output of less than 50V effectively unregulated in the EU? So all of the amps taking less than 50V DC at input (and driving regulat dynmic phones) would fall below what the Low Voltage Directive...

Quote: Originally Posted by tangent Yes, lowering the gain would help with the DC offset problem. Although it can negatively impact stability and rules out some op-amps, so I can't go too low. I might take it down to 5. Any more ideas? You should explicitly mention that the...

Quote: Originally Posted by komi Really, why EU dont limit car speed to 120km/h? what is speed limit in EU [Not a Germany] why they made a cars go faster then speed limit ... Whats the point there? If they care about someone health - or life ! There is no such thing as EU speed...

Quote: Originally Posted by Koyaan I. Sqatsi Then tell them that it's wrong. Don't have the government force some idiotic regulation on everyone. se Except of course the regulation is essentially about having to tell people that listening at execessive level for prolonged...

Quote: Originally Posted by astroid A more effective measure would have been to show the voume level in DB on the players. No, people would not know what it means. And this is also something that is covered in the proposal - people will need to be able to make an educated...

Quote: Originally Posted by wavoman The question of whether certain golden-ear individuals can hear differences in relaxed (but blind) settings that mirror listening at home has not been settled. Because, as many here have said, the testing is very difficult. The issue here is...

Quote: Originally Posted by Aethelred EU seeks to make 'cranking it to 11' on DAPs nearly impossible Love that brain-pounding sensation when you jack that volume past the sensible limit? If so, you best hop on the next flight to somewhere not within Europe, as the almighty European...

Quote: Originally Posted by majkel No chance that op-amp based amps can compete true hi-end so I think we can put aside Jan Meier's production, with all those lowly LM6171 inside. This is a completely ridiculous claim. Worse, it is an unsubstantiated claim.

Quote: Originally Posted by 00940 sanderx: just a minor correction. The m³ with opa604@40v will give roughly 22Vp-p (7.77Vrms). So you won't even go above the max power handling. Yes, you are right. I managed to get myself severly confused during writing what I wrote and dropped...

Quote: Originally Posted by Ub3rMario by "do fine" do you mean barely be able to power the cans or definitely will power them just fine? Dt880 @ 600 ohms have a max power handling capability of 200mW. 200mW into 600Ohms is 11Vrms or ~ 16Vpp. The headphones would at that point be...

Quote: Originally Posted by xnor Hmpf I found a cable loss calculator and I get a 3 dB treble attenuation at 331573 Hz with a 50 m cable (300pF/m). So does this even matter, provided that the amp isn't crap? edit: a picofarad is 0.000 000 000 001, that's nothing...

Delete. Some sort of mixup with threads

Quote: Originally Posted by xnor Big Poppa, this is more or less theoretical. I didn't try this out because I don't have so much different cables around, but I might try to do some comparisons between a normal and lets say 8.6m (0.1dB), 25m (~0.3dB) and 50m (~0.5dB) cable. 50m...

Quote: Originally Posted by 00940 @sanderx: you've got a computer able to measure signal up to 100khz ? I want yours Better would be to hook up a signal generator (a good one) and a scope to the amp and see if there is a serious attenuation at 100khz. For negative results you...

Quote: Originally Posted by Mannevond My plan was to build kind of a "super cmoy", which in my head would be a dual mono construction, reasonable power supply (possibly dual mono), "better than normal" feedback loop and of course fine decoupling caps. What do you mean with not...