WOT: IFB earplugs - what impedance to order?

richard-courtney wrote on 7/26/2010, 1:49 PM

I figure that someone might know in the forum.

Cellphone is the iPhone 3G S
The receiver bud will be from Audio Implements

But don't know the impedance to order. Couldn't find specs in cellphone
manual.

Comments

busterkeaton wrote on 7/26/2010, 4:28 PM

You want the lowest impedance

Most portable headphones are actually rated for 32 Ohms. Sennheisher's earphones for the iphone are 16 Ohms.

richard-courtney wrote on 7/26/2010, 7:59 PM

Thanks, theirs is 15 ohms.

baysidebas wrote on 7/27/2010, 7:27 AM

All an impedance mismatch will result in is a lower attainable maximum level. An exact impedance match provides the most efficient power transfer from the output stage to the transducer and will result in higher listening levels. If that isn't important, and with today's devices putting out too high levels as is, your ears will probably thank you for it. Keep in mind that relatively small mismatches will not result in any noticeable changes.