Rockbox General > Rockbox General Discussion

The iPod Poor Bass Response

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Chronon:
Part of the problem lies in the value of the capacitor used internally in the iPod.  When combined with the impedance of the load this creates a high-pass filter.  The corner frequency of this filter (the frequency below which the response rolls off) is determined by f = 1/(2∙π∙R∙C).  A small capacitance yields a larger value for this corner frequency.  A larger impedance (R) can mitigate this effect since only the product (R∙C) is important.

So, short of swapping out the capacitor, your best bet is choosing higher impedance headphones, which is part of the theme of this thread.  Helpfully, PHK Brasil posted EQ settings that are meant to compensate for this roll-off and provide a flatter spectral response for the two cases of 16Ω and 32Ω loads.

psycho_maniac:
yes a eq setting would work i guess but doesn't that make rockbox on the ipods (specifically the 80g) make it run   slower ? what type of headphones should we choose?

tdtooke:
Shure e2c and e3cs are in the 32ish ohm range and work nicely for me.  The e2c's are pretty affordable too, you can get them most places for under $100.  In my personal experience the earbuds that actually come with the iPod are too hard to get properly situated so you don't lose so much bass even without the aforementioned issue.  I've found just slipping those earbuds in without making alotta effort pretty much guarantees maximum bass loss.

psycho_maniac:
yeah some ear buds just dont fit as or maybe its just your ears? the ipod earbuds fit pretty good in my ears. ok so ive been looking up the shure e2c's and this is what i found for specs.
Find Tech Specs for Shure E2c Sound Isolating Earphones on Shure.com
   Speaker Type:       Dynamic MicroDriver
   Sensitivity (at 1kHz):       105dB SPL/mW
   Impedance (at 1kHz):       16 Ohm
   Cable Length:       E2c: 1.57m (62 inches)
E2c (in black): 1.45m (56 inches)
   Net Weight:       30g (1 oz)
   Input Connector:       3.5 mm (1/8") gold-plated stereo plug
   
is this what i want?

scorche:
Also, keep in mind that Shure has a new line of products that are "better" than the old.  I would go into further detail, but this is getting offtopic...

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