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iBasso fi.Quest Official Thread

post #1 of 668
12/22/09 at 8:47am
Thread Starter 
Instruction manual
Quote:
Originally Posted by ryuzoh View Post

Very sorry for late and I'm modding 8 fi.Q's from yesterday and struggling to make guidances.




The switches on above side will set for......

SW1; BUF634 Wideband mode ON/OFF with 200 ohm connection btwn 1-4 pin.

SW2; Output impedance changing switch (aka A47), and will improve stability for unstable OPAMPs,
also changes proportion of output currents from buffers and OPAMPs.(Highly recommended to set this ON)
Output current proportion
When ON, OPAMP : BUF on front : BUF on bottom = 1 : 1 : 1 (OPAMP works 1/3), can achieve less distortion, stability.
When OFF, OPAMP : BUF on front : BUF on bottom = 1 : 5 : 5 (OPAMP works 1/11), can provide more driveability for low efficient headphones.

If you mind the hiss, are you using with default setting?
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post #2 of 668
12/22/09 at 8:48am
Thread Starter 
Ok. Pictures speak a thousand words.










The inside




My Current setup
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post #3 of 668
12/22/09 at 8:50am
Thread Starter 
ryuzoh, ibasso did not send me the caps. How do I go on to obtain them?
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post #4 of 668
12/22/09 at 9:23am
This is a lovely amp and so too, is its prototype! March will be a great time!
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post #5 of 668
12/22/09 at 9:43am
something seems to be missing...
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post #6 of 668
12/22/09 at 10:28am
Now I'm worried.......
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post #7 of 668
12/22/09 at 10:41am
blonde moment
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post #8 of 668
12/22/09 at 10:44am
Thread Starter 
Let wait for ryuzoh to reply 1st. I'm sure there is some miscommunication somewhere.
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post #9 of 668
12/22/09 at 10:48am
Quote:
Originally Posted by theory_87 View Post
Let wait for ryuzoh to reply 1st. I'm sure there is some miscommunication somewhere.
Yes looks like one that was to go to Ryuzoh for caps.

I can't read on yours the shipping method. Was it DHL or UPS?
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post #10 of 668
12/22/09 at 10:52am
Thread Starter 
Quote:
Originally Posted by jamato8 View Post
Yes looks like one that was to go to Ryuzoh for caps.

I can't read on yours the shipping method. Was it DHL or UPS?
it was through fardar. I have no idea what company it is. But as long as goods arrive, I don't mind. And it only took 1.5 days to reach me from China (i'm in the same time zone as Beijing)

I'm in no hurry now since I send my sf5eb for reshelling and ACS T1 for rma.
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post #11 of 668
12/22/09 at 11:01am
Quote:
Originally Posted by theory_87 View Post
ryuzoh, ibasso did not send me the caps. How do I go on to obtain them?
You said me to buy BGs by yourself and let the PCB with no caps.
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post #12 of 668
12/22/09 at 11:18am
Funny, I didn't notice the missing caps! Obviously, the order system either has to be tweaked, or there needs to be perfect communication. Hope you get your caps soon.
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post #13 of 668
12/22/09 at 11:24am
The PCBs for qusp, theory_87, and uvak will be arrived with no caps.

Qusp's is having UTSJ 10000uF/16V as C1-C2, and the others will be shipped to be modified by me.
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post #14 of 668
12/22/09 at 11:27am
like I said I dont mind, its how I wanted it with no caps. sounds like there wasnt even a miscommunication. I was only commenting because ibasso said to me all amps were the same and I doubt everyone wants it like this. I repeat. its all good by me less work. you got the buffers and opamps though right?? aside from the 2 optional SMD places on the underside?

I do think that perhaps not everyone at ibasso has their head around this order and some special circumstance orders. but that is to be expected

by that I mean not everyone there, not in the workshop, because by the looks of the build its pretty sweet!!

I want to make it clear that I was not accusing ibasso of anything. but as it stood there did seem to be an explanation needed. and it is given there were indeed special cases apart from the 10000uf caps for me, but its just the person I spoke to initially must not have known about any special circumstances orders and so told me all were the same.

this was too mucgh for my little brain to take in and I have been recovering from it ever since ;P
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post #15 of 668
12/22/09 at 11:38am
Thread Starter 
ryuzoh, I believe it all miscommunication. Don't get it wrong. I don't have the intention to blame you or ibasso. You got pm
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