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JDS Labs C5/C5D (pg96) portable amp/amp+DAC - Page 33

post #481 of 3340
Quote:
Originally Posted by Apo0th3karY View Post

Wait so DT880 250ohm consumes less power than the M-100?

 

It consumes less current, and batteries are drained by current draw.

post #482 of 3340
Quote:
Originally Posted by stv014 View Post

Quote:
Originally Posted by Apo0th3karY View Post

Wait so DT880 250ohm consumes less power than the M-100?

 

It consumes less current, and batteries are drained by current draw.

I did not know that. I am still a trainee when it comes to amps and how they work, but that seems to make sense.

Today I'm trying a "no load" test of the C5's battery; so I'm just timing to see how long the battery lasts with it turned on, not connected to anything.


Edited by miceblue - 3/7/13 at 11:24am
post #483 of 3340

I'm about to go get mine from the mailbox!!!! woooO! i'll post thoughts and photos soon.

post #484 of 3340

o.k. o.k. i have the amp, but I have a few questions.  Maybe john can chime in?

 

First, it is very very cold.  It must have been in a cold shipping truck, but the amp has condensation on it that I can wipe off from it being so cold.  Should i wait to charge it and turn it on?  I wouldn't want to short anything out if that's possible...

 

Second, it is SO much smaller than I expected.  Maybe most people are used to portable amps, but I just thought it was going to be about another half in inch in all directions bigger.  That's awesome!  Small is good.

 

I'll snap some shots soon.  The image on the amp looks awesome, although as john mentioned is is a bit light.  I like the image on the light background, but if you're not looking at the image the light color looks a bit odd with the faceplate in my opinion.  It almost looks like it was painted white or something.  Hmmmmm.  Either way it looks like a nice little amp.  Can't wait to hear it.  I'll hold off until someone chimes in on the condensation...

post #485 of 3340

A few shots of my amp.  Love the graphic, but it looks a bit like someone painted it white.  In person it looks more whitish and like paint.  It almost doesn't look like metal... In fact, I think it will start to look dirty very soon because of the color.  He nailed the size and placement of the image though like i wanted. :-)

 

AppleMark

 

AppleMark

 

AppleMark

 

AppleMark


Edited by luisdent - 3/7/13 at 3:11pm
post #486 of 3340

All right.  I'm listening now.  I'm using the er-4s and I have a few initial observations.  First, the amp noticeably improves my ipod touch 5th generation's level of depth.  You can hear into the instruments and the sound stage a little better.  Nothing mind blowing, but as an audiophile that extra amount is awesome.  Otherwise, the frequencies sound pretty similar (the ipod touch 5g is pretty flat)  However, there is a slight super high treble rolloff on the touch 5g that always bothered me and finally has been measured for proof. ha.  The amp eliminates that with the line-out.

 

For the bass.  Good and bad.

 

I'm using the er-4s and I strive for neutral flat sound.  With a good seal with the er-4s I find the bass a little light.  However, with the bass boost switch on the c5 i find the bass too heavy.  Ironically, by about two times.  As we talked about earlier a 3db boost option would make the er-4s perfectly, amazingly flat while showing off it's bass quality.  The c5 makes it a bass monster surprisingly.  So I probably won't use it much as it is.

 

The good news, if you do use it, I find that the frequency selection is perfect.  It does an excellent job of giving you bumpin' bass without muddying up frequencies otherwise.  It sounds very transparent on the er-4s, albeit too loud bass-wise.  On the hd600 it is also very transparent.  The boost is a little more noticeable in thickness, but still leaves all the details and mids in tact very well.  The hd600 are insane with the boost on though.  Bassheads will love it.  It makes them far from neutral though.  They make every song a hip hop dream. haha

 

The volume control is perfect.  It gets very quiet with the er-4s and steps up very smoothly so I always feel like i can get the setting I want, however it isn't so smooth it takes too long to adjust.  In fact, the ramping up in volume when you hold the toggle is perfect in my opinion.  Excellent job John.  Everything feel solid enough.  The switches are nice and close to the surface so they aren't likely to get hit accidentally.  They even require a good amount (not too much) of force to switch so that should help too.

 

Overall it feels like a great little amp and sounds great.  Highly recommend it for any ipod.  It is definitely at least a slight improvement in sound quality.  ipods are pretty good and i think you start to hit the law of diminishing returns soon thereafter, however there should be a noticeable improvement for those who are into this sort of thing.  I can't comment on other amps as I haven't heard any, but I'm happy with the sound so far... :-)

 

UPDATE!!!

The bass isn't as loud on the er-4s as i first thought.  Upon more extended listening tests it is actually a very nice amount, but still more than neutral, which is what I'm aiming for. The boost sounds good overall, but on songs that are already bass heavy it pushes that low sub bass just over the ideal level.  So while, this is the case, I suppose this is probably actually a very good "general purpose" level John chose to implement.  I think most people wouldn't think it was too much for something like the er-4s, but it's just a little heavy footed in that sub region for me....


Edited by luisdent - 3/7/13 at 6:35pm
post #487 of 3340
Thanks, how would this compare against something like arrow 4G?
post #488 of 3340
Quote:
Originally Posted by audionewbi View Post

Thanks, how would this compare against something like arrow 4G?

 

If you mean me, I haven't heard the arrow amp.  I did research it a lot though before getting this.  If I didn't get this I would have got that. ha.  Primarily for the bass options, size, etc.  But for the price I think the c5 is the best from what I've researched, plus it's just a personal thing, but i like the company and it's attitude..

post #489 of 3340

For the record, if you have a 5th gen ipod and a short "cable" style adapter... Don't buy the angled line out cable. :-o haha... ooops...

 

 


Edited by luisdent - 3/7/13 at 5:10pm
post #490 of 3340

Sorry to flood the thread with meeee. haha, but...

 

I'm listening to the Sennheiser hd600 now and this is more than capable of driving them well.  On the lowest gain setting I picked a very quiet soundtrack song and maxed the volume.  While I could hit the max the song was more than loud enough, in fact it was higher than i think anyone would ever listen to it at.  I would be worried that any dynamic instruments would be way too loud if they came in all the sudden.  But you still have the high gain mode and that bumps it up a good amount further as well.  So hd600=yes indeedy doo.

 

The quality of the gain settings sounds identical to my ears with a brief comparison.  No noise on either, period.  Very nice.  With either pair i've tested.  Based solely on my ears, I'd say this could probably power a 400 ohm headphone well maybe higher with the gain setting on high.  beyond that i think you'd start running the amp near it's max volume, which i assume would be the least optimal sound quality (increased distortion, etc.) but that's just a guess...  In any case, 300-ohm hd600 is no problem at all.  With most current music both phones will blow your ears off on low gain mode if you want them too.  On quiet high quality classical, etc. the hd600 will probably want to be in high gain mode, but will be great.  beyone 300ohm, i'm not sure.  i know people here have some trigonometric-algebraic-beer-induced-calculations that can probably tell you exactly what power will do for which impedance, but i'll leave that to them. :-P

 

Speaking of math... can anyone tell me if it's safe to use my duet into my c5?  if so, how loud should i put the volume output on the duet?


Edited by luisdent - 3/7/13 at 5:21pm
post #491 of 3340
Received my C5 smily_headphones1.gif I unscrewed the case and flipped it around so that the LDS logo will be visible from the bottom biggrin.gif. I also used some blue painter's tape before putting on the Velcro as this setup will be temporary until I get some 3M low profile clear dual lock. I'll post impressions after I get some time with it.









post #492 of 3340
Quote:
Originally Posted by thor777 View Post

Received my C5 smily_headphones1.gif I unscrewed the case and flipped it around so that the LDS logo will be visible from the bottom biggrin.gif. I also used some blue painter's tape before putting on the Velcro as this setup will be temporary until I get some 3M low profile clear dual lock. I'll post impressions after I get some time with it.

 

 

Congrats and welcome to the "Red C5" family!

 

Quote:
Originally Posted by luisdent View Post

Sorry to flood the thread with meeee. haha, but...

 

I'm listening to the Sennheiser hd600 now and this is more than capable of driving them well.  On the lowest gain setting I picked a very quiet soundtrack song and maxed the volume.  While I could hit the max the song was more than loud enough, in fact it was higher than i think anyone would ever listen to it at.  I would be worried that any dynamic instruments would be way too loud if they came in all the sudden.  But you still have the high gain mode and that bumps it up a good amount further as well.  So hd600=yes indeedy doo.

 

The quality of the gain settings sounds identical to my ears with a brief comparison.  No noise on either, period.  Very nice.  With either pair i've tested.  Based solely on my ears, I'd say this could probably power a 400 ohm headphone well maybe higher with the gain setting on high.  beyond that i think you'd start running the amp near it's max volume, which i assume would be the least optimal sound quality (increased distortion, etc.) but that's just a guess...  In any case, 300-ohm hd600 is no problem at all.  With most current music both phones will blow your ears off on low gain mode if you want them too.  On quiet high quality classical, etc. the hd600 will probably want to be in high gain mode, but will be great.  beyone 300ohm, i'm not sure.  i know people here have some trigonometric-algebraic-beer-induced-calculations that can probably tell you exactly what power will do for which impedance, but i'll leave that to them. :-P

 

Speaking of math... can anyone tell me if it's safe to use my duet into my c5?  if so, how loud should i put the volume output on the duet?

 

 

Finally a differrent color from the rest of us here!
And it's white!!(Alarm bell ringing!! Apple fanboy alert!! tongue_smile.gif)
 
Good impressions there with the er-4s and hd600.Awaiting an impression with the 
ear muffs that's on your avatar biggrin.gif.
 
Anyway congrats luisdent!
Don't have the Duet but I have the Native Instrument Audio Kontrol 1(AK1) which is similar so using any line level source to the C5 shouldn't be an issue(in fact recommended). And if your reffering to using it with the Apogee duet from the headphone out to the C5 than it shouldn't be a problem.Volume level of 75% or more is recommended to give the best SQ from it.
 
Enjoy!
post #493 of 3340
Quote:
Originally Posted by luisdent View Post

A few shots of my amp.  Love the graphic, but it looks a bit like someone painted it white.  In person it looks more whitish and like paint.  It almost doesn't look like metal... In fact, I think it will start to look dirty very soon because of the color.  He nailed the size and placement of the image though like i wanted. :-)

Photos (Click to show)

AppleMark

 

AppleMark

 

AppleMark

 

AppleMark

 

 

That's actually a pretty clean-looking colour scheme. It looks like a pearl white colour from the photos, which I wouldn't mind having in my arsenal of electronics, to be honest.

 

Does anyone else mind doing a battery test? I tried to time the battery life without any load (if it matters, bass boost was on, low gain, volume step 10 of 63).

 

I got a shorter battery life without anything connected to it. Strange. blink.gif

post #494 of 3340
Quote:
Originally Posted by miceblue View Post

I did not know that. I am still a trainee when it comes to amps and how they work, but that seems to make sense.

Today I'm trying a "no load" test of the C5's battery; so I'm just timing to see how long the battery lasts with it turned on, not connected to anything.

There's also effeciency in the equation and the beyers are 7db less so it shouldn't be that diiferent overall.

post #495 of 3340

Actually, I'd think that at higher listening volumes, that 7dB difference would make quite a huge difference.

 

After the first 10dB increment over stock sensitivity, the next 10dB requires 10 times the power... and then the following 10dB would require another 10 times.

 

But I don't think the Beyers require that much power for an enjoyable experience. Very few modern headphones require a +30dB volume boost to sound good, and most just need about +10dB IMO. In that case, I'd agree with you that 7dB wouldn't be that big a deal. It's already loud enough.


Edited by Bill-P - 3/8/13 at 8:07am
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