volume
Al Johnson
openmoko at mazikeen.demon.co.uk
Fri Jul 3 13:37:29 CEST 2009
On Friday 03 July 2009, Seth Rothenberg wrote:
> Have there been any developments on volume?
> (Note, my Razr V3 isn't as loud as I would like either :-)
>
> The volume worries me enough that I asked
> google if there are any pocket amps....(found one :-)
>
> http://www.headwize.com/projects/cmoy2_prj.htm
Judging by the headphone amp link I assume you're talking about volume on the
headset. There's no progress since the problem and solution has been known
since before the FR was released, and have been in the wiki for some time.
Increasing the size of coupling caps improves bass response while shorting the
33R resistors increases output level with low-z headphones. Nobody is offering
the mods commercially as opening the can makes the process prohibitively
expensive, and there's no SOP.
http://wiki.openmoko.org/wiki/GTA02_bass_fix
There's no shortage of portable amps, but you may be better off with one that
includes a USB DAC. This is because of the 160Hz bass rolloff even with high-z
loads like an amp. Here are a few of the many on the market.
Portable amps:
Boosteroo
HeadRoom AirHead
Firestone Audio Fireye
Graham Slee Voyager
Portable amps with USB DAC:
HeadRoom BitHead
iBasso d2
Firestone Audio Fireye II
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