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JDS Labs C5/C5D (pg96) portable amp/amp+DAC appreciation + discussion thread - Page 128

post #1906 of 2885
Quote:
Originally Posted by Varoudis View Post
 
Quote:
Warning: Spoiler! (Click to show)
Originally Posted by luisdent View Post

The "best" is something of opinion and headphone model.  The difference between the jds labs and arrow is not that great.  I'd argue you have more options with the jds, because the boost is affected by the gain setting, so you effectively get 4 settings.

Here's the difference graphed.










The both roll back down, closer to 0db, at around 500hz and then very gently taper back to 0 at around 1000hz.  So, basically they both impact mostly the sub bass region peaking around the 40-50hz areas.  The c5 holds the bass at a fairly evenly boosted amount all the way down to 20hz or less.  The arrow boosts mostly the 40/50hz area and drops back down below that.

But as you see with the c5/c5d, you get a few changes in the slope and shape of the boost based on the gain setting.

Either way though, they are both within a few db of each other and within the same basic frequency regions.  The jds boost will sound a bit "fuller" if that's what you're after.  I like it because it hits the super duper low sub bass area so you get that awesome round, full bass tone when you need it. mmmmmmmmm  The arrow is good too though.

 


what software is used for these graphs?

 

You would have to ask JDS, as he graphed them.  I'm not sure about the arrow graph...

 

On another note, I've finished my 2 part in depth c5 review if anyone is interested:

 

http://handtokey.blogspot.com/2014/01/new-video-review-posted-jds-labs-c5.html


Edited by luisdent - 1/14/14 at 4:32pm
post #1907 of 2885

 

I got some question for those who connect their c5 to a computer speaker. Does it work as a preamp or is it double amping? and do i have to max the volume on the c5 and use the volume control on the speaker?

 

This is what im doing:

 

dx50 line out -> c5 -> computer speaker

laptop headphone out/speaker out(not sure if it recognize the amp and switch to line out) -> c5 -> computer speaker

 

I tried using moderate volume on c5 and using a higher volume on the speaker against higher volume on c5 and lower volume on the speaker. There is a clear a difference in sound quality. Volume is maxed on both pc and dx50.

 

btw my laptop speaker is Logitech z623.

post #1908 of 2885
Quote:
Originally Posted by Ishera View Post
 

 

I got some question for those who connect their c5 to a computer speaker. Does it work as a preamp or is it double amping? and do i have to max the volume on the c5 and use the volume control on the speaker?

 

 

This is what im doing:

 

dx50 line out -> c5 -> computer speaker

laptop headphone out/speaker out(not sure if it recognize the amp and switch to line out) -> c5 -> computer speaker

 

I tried using moderate volume on c5 and using a higher volume on the speaker against higher volume on c5 and lower volume on the speaker. There is a clear a difference in sound quality. Volume is maxed on both pc and dx50.

 

btw my laptop speaker is Logitech z623.

 

I would put the volume of the c5 close to max and use the speaker volume so you get the best signal quality to the speakers.

post #1909 of 2885
Quote:
Originally Posted by luisdent View Post
 

 

I would put the volume of the c5 close to max and use the speaker volume so you get the best signal quality to the speakers.

 

With speaker volume close to zero.. I can't even max the C5's volume because it gets too loud already. I get a strong hiss when the volume on the c5 goes beyond certain point too.

post #1910 of 2885
My old Arrow 12he's input jack has gone all pear shaped so I'm looking for a replacement. Although I'm not a basshead, I really enjoy the bass boost option on the arrow. It sounds like the JDS would be a good replacement. I could always just get another arrow, but I'd like to try something different.

My headphones are Senn Amperiors, SR-60's, KSC-75's and RE0's (which really need the bass boost) and my source is an ipod.

I'd like to thank everyone for all the informative posts as it's great information for someone trying to make a purchasing decision.

Steve
Edited by desmoface - 1/15/14 at 6:37am
post #1911 of 2885
Quote:
Originally Posted by luisdent View Post
 

 

You would have to ask JDS, as he graphed them.  I'm not sure about the arrow graph...

 

On another note, I've finished my 2 part in depth c5 review if anyone is interested:

 

http://handtokey.blogspot.com/2014/01/new-video-review-posted-jds-labs-c5.html

 

We use a Prism dScope Series III.

 

I've tested the Arrow 3G on the same audio analyzer, and its bass boost is also affected by gain.

Reply
post #1912 of 2885

Next Monday I will receive from Spain (I'm Italian) the Jds Labs C5D and then I will do my little review about this amp/dac comparing to Fiio E17... I hope this will be a bass boosting device...

post #1913 of 2885
Quote:
Originally Posted by Ishera View Post
 
Quote:
Originally Posted by luisdent View Post
 

 

I would put the volume of the c5 close to max and use the speaker volume so you get the best signal quality to the speakers.

 

With speaker volume close to zero.. I can't even max the C5's volume because it gets too loud already. I get a strong hiss when the volume on the c5 goes beyond certain point too.

 

I can't speak for your exact setup, but if all equipment is decent, the best configuration is usually to have the volumes louder closer to the source as long as there is no distortion.  In other words, have the player device maxed, then the intermediate devices and then use the final speakers for volume.  However, there are a few exceptions.

 

If you want to control the volume without using the speaker volume, you would set the amp and speakers so that the loudest setting on the amp is the loudest setting you would listen to comfortably.  Then you can simply turn the amp up and down to control the volume.  You shouldn't lose much this way if the overall setup is good

 

The second exception would be if any devices exhibit poor performance at certain levels.  Perhaps one device has too much noise if it's too loud.  Then leave that down and turn up the other device for instance.  But usually noise like that is hard to eliminate no matter what you do if it's inherent to the device performing poorly.

 

At what point in percentages does the c5 start to hiss?  It sounds like the speakers are already powerful enough and you may not need the c5.  If you turn the c5 to 80% that is a good volume if that works with the speakers.

 

With most systems I have, I find 80% is a good quality level.  Sometimes more than that can distort the device it's connected to from too much signal.  I would experiment more, but if you're using the c5 at less than 50% it would seem possibly unnecessary.  What speakers are these?

 

Quote:
Originally Posted by jseaber View Post
 
Quote:
Originally Posted by luisdent View Post
 

 

You would have to ask JDS, as he graphed them.  I'm not sure about the arrow graph...

 

On another note, I've finished my 2 part in depth c5 review if anyone is interested:

 

http://handtokey.blogspot.com/2014/01/new-video-review-posted-jds-labs-c5.html

 

We use a Prism dScope Series III.

 

I've tested the Arrow 3G on the same audio analyzer, and its bass boost is also affected by gain.

 

Wouldn't you say the boosts aren't really that different though?  I prefer the super sub extension of the c5d for things like the er4s though personally, especially at half setting. mmmmmm.

post #1914 of 2885
Quote:
Originally Posted by luisdent View Post
 

 

The "best" is something of opinion and headphone model.  The difference between the jds labs and arrow is not that great.  I'd argue you have more options with the jds, because the boost is affected by the gain setting, so you effectively get 4 settings.

 

Here's the difference graphed.

 

 

 

 

The both roll back down, closer to 0db, at around 500hz and then very gently taper back to 0 at around 1000hz.  So, basically they both impact mostly the sub bass region peaking around the 40-50hz areas.  The c5 holds the bass at a fairly evenly boosted amount all the way down to 20hz or less.  The arrow boosts mostly the 40/50hz area and drops back down below that.

 

But as you see with the c5/c5d, you get a few changes in the slope and shape of the boost based on the gain setting.

 

Either way though, they are both within a few db of each other and within the same basic frequency regions.  The jds boost will sound a bit "fuller" if that's what you're after.  I like it because it hits the super duper low sub bass area so you get that awesome round, full bass tone when you need it. mmmmmmmmm  The arrow is good too though.


alright, i'm gonna go for the c5d, i don't have the patience to wait for the arrow g5 anyways.
 

thanks for the infos!

 

edit: will this work: ipod touch 5g --> apple cck --> http://plusbee.com/ebay/plusbeenew/img/UAM-BM-B5P.jpg --> jdslabs c5d --> headphones


Edited by Sinik - 1/15/14 at 4:20pm
post #1915 of 2885
Thread Starter 

Another convert ;)

 

I'm sure you'll love the C5D and also the cutomer service that comes with purchasing any JDS Labs product.

 

I wonder what John will come up with next (Desktop O2 would be awesome, more power, more inputs and outputs + other stuff like a bass boost hehe)

post #1916 of 2885
Alrighty then, my arrow is dead, so I just placed my order for the c5. Woohoo!

Steve
post #1917 of 2885
Quote:
edit: will this work: ipod touch 5g --> apple cck --> http://plusbee.com/ebay/plusbeenew/img/UAM-BM-B5P.jpg --> jdslabs c5d --> headphones

That will work, but you are going to want a flexible cable and not just a small adapter...
post #1918 of 2885

Hopefully get my C5D tomorrow to play with my HD650's :)

Cant wait

post #1919 of 2885
Quote:
Originally Posted by luisdent View Post
 

 

I can't speak for your exact setup, but if all equipment is decent, the best configuration is usually to have the volumes louder closer to the source as long as there is no distortion.  In other words, have the player device maxed, then the intermediate devices and then use the final speakers for volume.  However, there are a few exceptions.

 

If you want to control the volume without using the speaker volume, you would set the amp and speakers so that the loudest setting on the amp is the loudest setting you would listen to comfortably.  Then you can simply turn the amp up and down to control the volume.  You shouldn't lose much this way if the overall setup is good

 

The second exception would be if any devices exhibit poor performance at certain levels.  Perhaps one device has too much noise if it's too loud.  Then leave that down and turn up the other device for instance.  But usually noise like that is hard to eliminate no matter what you do if it's inherent to the device performing poorly.

 

At what point in percentages does the c5 start to hiss?  It sounds like the speakers are already powerful enough and you may not need the c5.  If you turn the c5 to 80% that is a good volume if that works with the speakers.

 

With most systems I have, I find 80% is a good quality level.  Sometimes more than that can distort the device it's connected to from too much signal.  I would experiment more, but if you're using the c5 at less than 50% it would seem possibly unnecessary.  What speakers are these?

 

 

Wouldn't you say the boosts aren't really that different though?  I prefer the super sub extension of the c5d for things like the er4s though personally, especially at half setting. mmmmmm.

 

I'm not sure what volume percentage the C5 is at since there isn't any kind of onscreen indicator. I say hold increase volume to max for 3-7 seconds for a pleasant listening level. 6-11s then i get the hiss. These are very poor measurements but it should do.Even with low volume on the C5, I'm still picking up the sound c5 produces.There isn't any distortion when combined with really high volume setting on the speaker. The speaker sounded pretty nice without the c5 when connecting to my laptop and dx50 line out, but even better with the c5 in between. The speakers are logitech z623. Nothing special, budget 2.1 pc speaker.

http://www.amazon.com/Logitech-980-000402-Speaker-System-Z623/dp/B003VAHYTG

 

Am i double amping in this setup? Is c5 working as a preamp?

post #1920 of 2885
Quote:
Originally Posted by luisdent View Post


That will work, but you are going to want a flexible cable and not just a small adapter...


why? i mean, the apple cck is already a flexible cable... if i would take another flexible cable it would be even longer.. btw this will be for portable use mainly, i'm planning to buy a Aune T1 (or schiit magni/modi combo, another choice i can't make xD) for desktop use.

 

and if i want to use it for desktop use, i already have a 3ft usb to mini usb cable.

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