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JDS Labs C5/C5D (pg96) portable amp/amp+DAC appreciation + discussion thread - Page 21

post #301 of 2628

Is that with the BassBoost off?

 

Quote:
Originally Posted by miceblue View Post

Initial comparisons between the C5 and the O2, to me at least, the O2 has a larger soundstage with better instrument separation, the C5 has more bass (though I admit it is hard for me to properly volume match).

post #302 of 2628
Quote:
Originally Posted by thor777 View Post

Is that with the BassBoost off?

 

Quote:
Originally Posted by miceblue View Post

Initial comparisons between the C5 and the O2, to me at least, the O2 has a larger soundstage with better instrument separation, the C5 has more bass (though I admit it is hard for me to properly volume match).

It is with bass boost off; the bass boost is a pretty large boost in bass.

How does one volume-match between two amplifiers? I want to make sure my observations are fair, and that the C5 just isn't at a higher volume level.

post #303 of 2628
Quote:
Originally Posted by miceblue View Post

It is with bass boost off; the bass boost is a pretty large boost in bass.

How does one volume-match between two amplifiers? I want to make sure my observations are fair, and that the C5 just isn't at a higher volume level.

 

Get a fake head with microphones in it and record the output of the headphones?  :-P haha

post #304 of 2628

Placed my order of a red C5 ^^ upgrading from my CMoyBB, can't wait for it to arrive!

post #305 of 2628

C5 vs. E12.......popcorn.gif

post #306 of 2628
Quote:
Originally Posted by Craigster75 View Post

C5 vs. E12.......popcorn.gif


You sunk my Battleship!

post #307 of 2628
Quote:
Originally Posted by Craigster75 View Post

C5 vs. E12.......popcorn.gif

 

Let's try something more realistic: C5 vs C421!

post #308 of 2628
Quote:
Originally Posted by Bill-P View Post

 

Let's try something more realistic: C5 vs C421!

well we can still compare the E12 with C5 if we are able to volume match them. Sure E12 will have more power but at certain point both amp will get loud on the same level. 

post #309 of 2628
Quote:
Originally Posted by miceblue View Post

It is with bass boost off; the bass boost is a pretty large boost in bass.

How does one volume-match between two amplifiers? I want to make sure my observations are fair, and that the C5 just isn't at a higher volume level.

 

Play a sine wave (say, 1kHz) from your computer and measure the amplifiers' outputs with a multimeter until both have the same reading.

Reply
post #310 of 2628

any plans on combining the jds labs amp with a dac in one housing?

post #311 of 2628
Quote:
Originally Posted by jseaber View Post

 

Play a sine wave (say, 1kHz) from your computer and measure the amplifiers' outputs with a multimeter until both have the same reading.

 

Pardon my ignorance, but can someone tell me how to do this?  I assume you put one lead on a section of the inner headphone jack and the other lead on the other section?  Can you harm anything if you touch the wrong thing or touch leads together?  Am I way off?  What settings would you use to measure? :-/

post #312 of 2628

I tried to take photos of my red C5, but have not been able to remove my phone from the thing since i started listening.  I assume the battery will die sometime so i'll try once I am charging it.

The volume control so far is good.  I haven't thought it lacking in volumes between steps and the gain control (press in on the volume) is easy to press, so far no problems.

 

I can write up more later.  :)

Cheers,

post #313 of 2628

If anyone has the RSA shadow can they do a quick comparison, I think shadow is the only DAC in the market which is worth of getting compared with the C5. (I know ibasso T5 tried to implement digital volume but they failed ) 

post #314 of 2628

I purchased a 40x3 pack of straight header pins from Fry's Electronics (it was only $1.99 USD), and it looks like they'll fit right-in with a slight trim. I'll soldering later when I get the ISP programmer and make sure the pins fit in the connector.

 

 

 

 

As for the multimeter test, I'm guessing you measure the voltage reading? I was going to stick a removable audio cable in the C5/O2 and measure the voltage across the ring/tip (R/L channel) and sleeve (ground).


Edited by miceblue - 2/25/13 at 9:28pm
post #315 of 2628
Quote:
Originally Posted by miceblue View Post

I purchased a 40x3 pack of straight header pins from Fry's Electronics (it was only $1.99 USD), and it looks like they'll fit right-in with a slight trim. I'll soldering later when I get the ISP programmer and make sure the pins fit in the connector.










As for the multimeter test, I'm guessing you measure the voltage reading? I was going to stick a removable audio cable in the C5/O2 and measure the voltage across the ring/tip (R/L channel) and sleeve (ground).

That makes more sense.. Using a cable/jack with open wire ends... Dur
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