Quote:
|
Originally Posted by citizen
Hey GS, could you explain the whole impedence thing? I've noticed a lot of phones are around 60 ohms, but have seen some as low as 30 and heard that some go as high as 600? I know it boils down to the kind of amp you will end up needing to power them adequately, but could you tell me, is a high/low impedence good/bad and why it matters?
|
Low impedance (usually 32/40/50 ohms) headphones are actually very demanding. These headphones demand a lot of current - power is constant so if you have constant voltage - the maximum power supply voltage of the amp or cdp/dap then the only variation can be in current. V = I * R so if V is constant and R is low means I (current) is high.
Similarly in a high impedance headphone - V=I*R and R is high. therefore the current demand is low.
To be precise - low impedance headphones prefer low voltage and high current. High impedance headphones prefer high voltage and low current.
Impedance matching is also an issue. Therefore you prefer to use Tube amplifiers (high output impedance) with high impedance headphones. Tubes are also low current high voltage so it is a match made in heaven
Basically if you have a 300 ohm sennheiser headphone - you will be better off with a tube amp or a high voltage + high current solid state amp like the Dynahi (
www.veda-audio.com).
With a low impedance headphone a high current amplifier is a better option (Dynahi again...30 watts stereo is more than any headphone or efficient speaker will ever need
)
anyways i just read the first page of the thread where u say they r good for mp3's. but there is so much high end bass in this that some of my mp3's distortions actually become more exagurated. if u know what i mean. i know true audiophiles wouldnt listen to mp3's except when neccesary.
