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JDS Labs C5/C5D (pg96) portable amp/amp+DAC - Page 37

post #541 of 3340

I like to thank you on behalf of the thread members, once again excellent feedback service :-) Cant wait till mine arrives. 

post #542 of 3340
Quote:
Originally Posted by jseaber View Post

 

The power management IC operates in supplement mode when connected to USB. As long as the USB voltage remains above the battery voltage (your +5V USB supply should always exceed the Li-Ion battery voltage), then power is directly supplied to C5 by USB and the battery is out of the equation. Current is only drained from the battery if the USB bus for some reason cannot supply adequate voltage/current. For example, maybe an overzealous device on the same USB hub consumes maximum bus current, starving C5 of available power.

 

Fantastic! Thanks!

post #543 of 3340

Question for John or anyone who knows:

 

If I'm amplifying the signal from my laptop, is the 3.5" input the only input? Can I input signal via the usb port or is that solely for charging?
 

post #544 of 3340
Quote:
Originally Posted by gkanai View Post

Question for John or anyone who knows:

 

If I'm amplifying the signal from my laptop, is the 3.5" input the only input? Can I input signal via the usb port or is that solely for charging?
 

C5 is an amp only so USB is only for charging. 


Edited by audionewbi - 3/10/13 at 11:30pm
post #545 of 3340
Quote:
Originally Posted by gkanai View Post

Question for John or anyone who knows:

 

If I'm amplifying the signal from my laptop, is the 3.5" input the only input? Can I input signal via the usb port or is that solely for charging?
 

As audionewbi said, the USB port is for charging the internal battery. The only input for the C5 is through the 3.5 mm jack...unless you mod it like rckyosho did. ;)

 


I took some photos of the C5's circuit board early this morning for a different thread, but I might as well post them here too:

^ Atmel Mega microcontroller

 

^ op-amp chip (OPA2227)

 

^ overall circuit


Edited by miceblue - 3/10/13 at 7:07pm
post #546 of 3340
Can anyone recommend a higher capacity battery with the same type connector as the stock battery? Or if anyone knows what the 3-pin connector is called that would help too, thanks! If I was to solder my own Samsung battery to a connector, I just need to solder red to + and black to minus?
post #547 of 3340
Quote:
Originally Posted by thor777 View Post

Can anyone recommend a higher capacity battery with the same type connector as the stock battery? Or if anyone knows what the 3-pin connector is called that would help too, thanks! If I was to solder my own Samsung battery to a connector, I just need to solder red to + and black to minus?

rckyosho listed a bunch of things that could work in his post a few pages back:

http://www.head-fi.org/t/647838/jds-labs-c5-portable-amplifier-appreciation-discussion-thread-first-units-have-arrived-pg20/510#post_9245190

 

Quote:
you have to solder or glue(not recommended) wires to the S3 battery and use a similar connector or small female pins(removable and shrinkwrap to prevent shortages) to connect to the C5
post #548 of 3340
Quote:
Originally Posted by audionewbi View Post

C5 is a amp only so USB is only for charging. 

 

Understood & thanks.

 

I've got the small form-factor ODAC, and paired with the C5, it's quite excellent.

post #549 of 3340
Quote:
Originally Posted by gkanai View Post

 

Understood & thanks.

 

I've got the small form-factor ODAC, and paired with the C5, it's quite excellent.

Yes I have seen ODAC and C5 pictures, looks very compact and delicious :-D

post #550 of 3340
Quote:
Originally Posted by audionewbi View Post

Quote:
Originally Posted by gkanai View Post

 

Understood & thanks.

 

I've got the small form-factor ODAC, and paired with the C5, it's quite excellent.

Yes I have seen ODAC and C5 pictures, looks very compact and delicious :-D

The only bad thing about that setup for me is when I need to charge the C5 because I only have 1 USB port on 1 side of my computer. I can't use the ODAC and the C5 at the same time in that case, unless I use a USB hub. >_<

post #551 of 3340
Quote:
Originally Posted by feverfive View Post

I'm really interested in the C5, and I like the idea of supporting a customer-oriented company based in the U.S. (there, I said it).  Still, I'm interested in seeing impressions of how it fares against the generally accepted "big boys" like offerings from RSA, ALO & TTVJ.  Heck, even a comparison against something like the Arrow 4G (sound quality only..I get the difference in form factor) is something to which I look forward.  After my nothing-but-crappy service experiences over the past 3 years w/ Headstage, and aloofness from the aforementioned "big boys", if the sound quality is in the same ballpark, I'm ready to jump ship & join y'all.
I have done a comparison with the apex glacier in fact a few pages back and gave the C5 a slight advantage in terms of detail retrieval but if you want a more forgiving sound than the apex might be better.

Quote:
Originally Posted by phrosty View Post

Got my order in today. Will go well with my JDS ODAC.

Does anyone know how it acts when fully charged, plugged in, and playing? Will it still power itself through the battery, constantly charging? I may use this at work and don't want to destroy the battery life by doing so.

Quote:
Originally Posted by luisdent View Post

I was wondering this too. When it finished charging the led went out and turned green. At that point is it using battery again or running off USB?

I know this has been answered by John but just wanted to add that if you really want to use the C5 solely powered by usb(meaning a few months or more not days) than my advice is to charge the battery to at least 60% and remove it and store it in the fridge or some cool storage area.That would save the battery.And yes it will run even without the battery connected as John has explained and I have personally tried while doing the battery mod.
Quote:
Originally Posted by miceblue View Post


Holy moly. You sir are the master of mods! I am speechless, hahahaha.
Really, that's an amazing finding. Personally I don't mind the ~11-hour battery life, but I will definitely consider the S3 battery swap if I ever need a longer battery. redface.gif

Kudos to you~

Thks miceblue, do note that it won't work with the S3 battery if you decide to solder the 6 pin header for the ISP Programmer.
Quote:
Originally Posted by jseaber View Post


Fun fact: Cameron Sino put stickers on the wrong side on this shipment. The battery model # is supposed to be easily visible:



1000
That's a fun fact indeed and I believe miceblue and all the first shipment suffer the same fate.Has CS address this then?....just curious.
Quote:
Originally Posted by thor777 View Post

Can anyone recommend a higher capacity battery with the same type connector as the stock battery? Or if anyone knows what the 3-pin connector is called that would help too, thanks! If I was to solder my own Samsung battery to a connector, I just need to solder red to + and black to minus?
You have to do some legwork yourself.The dimension for the original battery is 51 x 36 x 7 mm.Try to look for one is around 5mm or lesser thickness as even 7mm thickness for the original C5 battery is actually rubbing the C5 case as I have notice on mine where the raw aluminum color is showing in the inside due to me removing the amp in and out much more than your typical user would.
post #552 of 3340
Quote:
Originally Posted by miceblue View Post

The only bad thing about that setup for me is when I need to charge the C5 because I only have 1 USB port on 1 side of my computer. I can't use the ODAC and the C5 at the same time in that case, unless I use a USB hub. >_<

How about the other side?
 

post #553 of 3340
Quote:
Originally Posted by audionewbi View Post

Quote:
Originally Posted by miceblue View Post

The only bad thing about that setup for me is when I need to charge the C5 because I only have 1 USB port on 1 side of my computer. I can't use the ODAC and the C5 at the same time in that case, unless I use a USB hub. >_<

How about the other side?
 

That could work too, but then I have a USB cable wrapping around my laptop to the other side, and that doesn't look very nice; not to mention the Monoprice cable being fairly stiff.

 

Quote:
Originally Posted by rckyosho View Post

Quote:
Originally Posted by feverfive View Post

I'm really interested in the C5, and I like the idea of supporting a customer-oriented company based in the U.S. (there, I said it).  Still, I'm interested in seeing impressions of how it fares against the generally accepted "big boys" like offerings from RSA, ALO & TTVJ.  Heck, even a comparison against something like the Arrow 4G (sound quality only..I get the difference in form factor) is something to which I look forward.  After my nothing-but-crappy service experiences over the past 3 years w/ Headstage, and aloofness from the aforementioned "big boys", if the sound quality is in the same ballpark, I'm ready to jump ship & join y'all.
I have done a comparison with the apex glacier in fact a few pages back and gave the C5 a slight advantage in terms of detail retrieval but if you want a more forgiving sound than the apex might be better.

Quote:
Originally Posted by miceblue View Post


Holy moly. You sir are the master of mods! I am speechless, hahahaha.
Really, that's an amazing finding. Personally I don't mind the ~11-hour battery life, but I will definitely consider the S3 battery swap if I ever need a longer battery. redface.gif

Kudos to you~

Thks miceblue, do note that it won't work with the S3 battery if you decide to solder the 6 pin header for the ISP Programmer.
Quote:
Originally Posted by jseaber View Post


Fun fact: Cameron Sino put stickers on the wrong side on this shipment. The battery model # is supposed to be easily visible:



1000
That's a fun fact indeed and I believe miceblue and all the first shipment suffer the same fate.Has CS address this then?....just curious.

I didn't realise the Apex Glacier has a retail price 2.5+ times that of the C5. That's pretty impressive for the C5 in that comparison then.

 

Yeah I just saw your photo with the S3 battery installed and it actually rests on top of the microcontroller chip and OPA2227 op-amp. It's surprising that it still fits in the case on top of those components.

 

Regarding the battery label, it was curious to me that they didn't have the specs and branding on it (or at least a visible one to the user when they take the circuit out of the casing).


Edited by miceblue - 3/11/13 at 12:03am
post #554 of 3340

Quote:
Originally Posted by rckyosho View Post

That's a fun fact indeed and I believe miceblue and all the first shipment suffer the same fate.Has CS address this then?....just curious.

 

Yes, at least they were consistent in this lot. We'll ask them to correct the stickers in the next shipment.

Reply
post #555 of 3340

Woah! I was just trying out the C5 is while charging via USB and when the C5's was done charging, the LED went from blue (indicating charging) to regular green. Cool.

 

^ the LED is green here; also note the cable mess

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