any earphone experts? Impedance q
any earphone experts? Impedance q
Author
Discussion

paranoid airbag

Original Poster:

2,679 posts

188 months

Sunday 7th July 2013
quotequote all
I'm looking for a new pair of earphones, my last pair was a sennheiser cx281. The reason I went for these earphones is the inline volume control - my music player has a slight hiss when playing something (i.e. pause and it goes away), so the only way around it was to use a higher volume from the player and reduce the volume via the control (the hiss is a constant volume when the player is on, so high volume + attenuation = lower hiss). So a volume control that is changing the output from the player is useless.

However despite me treating them like fairy dust, two pairs have broken: although I have been refunded it's still a hassle. I'd be interested in other earphones, but none have this sort of volume control - instead changing the output from the player. One other solution is going for earphones with a 32 ohm impedance instead of 16. Would this have the desired effect (less hiss at the expense of requiring a higher output from the player for the same volume), is this significant enough, or should I just buy the cx 281 again and rely on sennheiser's (IMO fairly quibble-free) returns policy?

jet_noise

6,075 posts

211 months

Monday 8th July 2013
quotequote all
Dear qa,

if the two headphones are equal in sensitivity then you should expect of the order of a 50% reduction in power for the same player level setting by changing from 16 to 32ohm impedance 'phones,

regards,
Jet

singlecoil

35,825 posts

275 months

Monday 8th July 2013
quotequote all
So a 3db drop then.

jet_noise

6,075 posts

211 months

Monday 8th July 2013
quotequote all
Dear s,

singlecoil said:
So a 3db drop then.
yes.
I didn't want to talk too technical in case OP is a layman to the world of electeronics (as my FIMechE accredited friend calls it) smile,

regards,
Jet

paranoid airbag

Original Poster:

2,679 posts

188 months

Monday 8th July 2013
quotequote all
FTR I know a little about electronics etc, and how the dB scale works smile I suspect the difficulty is I can't think of a way of quantifying the level of hiss other than 'slight but noticeable in quiet bits' so I'm not sure if a 3dB reduction is enough or not. Given I never really use more than about half the player's maximum volume the required power increase shouldn't be an issue, but I think I'm probably going to getting another pair of cx 281's.

singlecoil

35,825 posts

275 months

Monday 8th July 2013
quotequote all
Have you considered getting a different player?