Yeah, rickcr42, those 600ohm headphones were made to last forever (I had an 20+ year old pair of K240Ms working perfect), but I think AKG is still making 600ohm phones (the M version), they just have more types now (impedances). As far as i know, they made 600ohm phones for another reason...

Thanks, Tomo, AO means opamp (I was using jargon, sorry ), It is very unlikely that you will ever see an opamp in flames, even if you shortcircuit the output (every modern opamp that I know has output current limitation circuitry). The easiest way to burn an opamp is to supply it at a bigger...

Thanks, Tomo, for your answer ... Yes, I heard about different other AO-based flavors of amplifiers, but right now I just want to build as soon as possible an amplifier, and don't want to wait another 10-15 days 'till I get some new components .. But I guess i will build a simple amplifier with...

Well .. I allready got a few OPA2134, but then I read on the datasheet this: "OPA134 series op amps are capable of driving 600ohm loads with power supply voltage up to ±18V.". Ok, that's perfect for the 600ohm headphones, but for 32 ohm I guess it will be a problem (I will have to use the same...

Hello there, I searched for an headphone amplifier schematic for my AKG K240M headphones (600 ohms), and I am not satisfierd with what I have found till now. The CMOY amplifier will hapilly work I guess with 600 ohm headphoes but I think it doesn't have the current capacity to drive lower...

Yes, I can strongly recommend you to buy the K240's, I am a big fan of these phones, but there's some things that I would like to mention. First of all, watch out for the impedance, the M version has 600ohm, and it's hard to drive (the audio level when connecting them to a normal MD or CD...

Well, I think the 240's deserve to be mentioned, those are very good phones for the money .. Very durable (I had one 23-25 year old pair still working fine), very confortable, and also very good sounding ... I only had the M version of the 240's (600ohm), but the others should be quite similar i...