thegrobe
1000+ Head-Fier
- Joined
- Sep 30, 2012
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Alright...great info here. I think I'm ready to get this going. I will post up hopefully successful results soon!
Hey mate, it's not that difficult really!
Take the case off the FiiO and drill the side of the iPod back panel with the corresponding on/off & volume button holes from the casing.
Bags of room in there if you have done the CF Mod but I also took off all the connectors (mini USB & phone jacks)... then it's really slim (about 3mm)
Put the buttons in the holes, then put some hot glue (or double sided tape?) on the back pane and line the FiiO up... then stick the FiiO's battery onto the back panel as well.
You could use the ipod battery for power but there is room so why not increase the capacity.
They use the same battery & charge voltage so I just took a couple of wires from the FiiO's mini USB pads to the USB charge pins of the iPod.
When you charge the iPod you charge the FiiO.
Then I just wired from the DAC to the FiiO input pads via a couple of Elna Silmic II's...then FiiO output pads straight to the LOD pins.
If you've done the iMod it's pretty straight forward, you just need a dremel for the button holes.
Oh yes, I didn't bother with the Bass Boost switch, I just left it 'ON'.
I didn't take any photo's but I could open it up and take some if you want.
Pretty straight forward though once you have the three holes drilled.... except for the iMod to the LOD pins... that's fiddly but the only way IMO.
Could anyone give me a link with international shipping for recommended Caps used in DIYmod? Some use resistors aswell, should I?
I am wondering how many of you who have soldered the wires to the tiny pins at the LOD. Man I tried and it's mission impossible for me!
Has anyone a jERiCOh's simple Excel corner frequency calculator, that is mentioned on the old first page?
A one question about capacitors voltage. Capacitance i calculate, but which capacitor voltage can I use in imod? On what depends?
Thanks
The voltage for the capacitors is the VDC you want to block by the use of the capacitors. So anything above 4.2 volts ( you might get that if there is a short somewhere) is a safe value.
I am also very curious about what different uf ratings of the capacitors make to the sound. I realize that you should match this with the input impedance of the amp....but..
in layman's terms, if using the same amp, no other variables, what audible difference will there be using a 4.7uf cap vs. a 47uf cap? does the higher # (47) raise or lower the 3db point? sorry, I am not good at math.
does the different value greatly affect bass response, or anything else? thank you!
incorrect, it must be rated for the entire voltage ie. the DC offset + signal voltage swing
qusp said:.
raising the cap to 47uf from 4.7 will lower the 3db point and the point intermodulation starts by a decade (for example 4.5Hz vs 45Hz) if driving the same input impedance, I cannot tell you what the numbers will be without the impedance. how audible it will be will depend on how low that 3db point is, whether it ends up in the audible band and whether your headphones are capable of low distortion down that low anyway.