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iFi products Discussion Thread iTUBE will be out soon!! - Page 7

post #91 of 295

Hello I need some help  here, I have Corsair 2.1 speakers;

 

 

 

I have Computer -> iUSB -> iDAC -> iCAN -> Hifiman he-400 via  HP out, Corsair speakers via 3.5 output from the iCan.

 

I get sound from both the units (speakers and headphone) but my optimum box (Bass) doesnt work from the speakers :( Only get sound from the Left and Right.

 

How do I get the Subwoofer to work too?

 

Thx.

 

Edit, got it to work, subwoofer was disabled by the remote LOL


Edited by mindflayz - 4/25/13 at 2:32am
post #92 of 295

Hi,

Quote:
Originally Posted by Nirmalanow View Post

I also saw this message from iFi on iFi's facebook page that suggests you cannot hook up to both the RCAs and the headphone output on the iDAC:

 

"Hi, if you use the RCAs, then it is just like any other source so you need a pre-amp. However, if you use the 3.5mm output, then you use the built-in analogue volume control. You can only use ONE output at a time so as per the instructions in the manual and on the chassis, if RCAs are connected, then turn the volume down to zero. A few people have gone through this learning curve!"


Funny, I did not have problems using both HP out and Line out at the same time. I tried this first for my headphone amp testing, but even with levels matched I felt there was too much of a difference in sound between the two to be usable for a fair comparison.

What it says on bottom of the iCAN is to turn the headphone volume down if the headphone is not plugged in. Makes no sense to me why, but I do it anyway.

Cheerio Rich

post #93 of 295
Thread Starter 

I don't think hooking up a speaker with iCAN is suitable, and any differences should be minimal, it is better and worth you invested on a better DAC

post #94 of 295
Hi
I just bought one of the ifi amp on the London meeting for my hd650.
Love it!
I have tried many things but they are just so good together smily_headphones1.gif
post #95 of 295
Quote:
Originally Posted by ksk75 View Post

Hi
I just bought one of the ifi amp on the London meeting for my hd650.
Love it!
I have tried many things but they are just so good together smily_headphones1.gif


I agree that this amp really shines with the HD650s.

post #96 of 295
Quote:
Originally Posted by bedlam inside View Post

Hi,


Funny, I did not have problems using both HP out and Line out at the same time. I tried this first for my headphone amp testing, but even with levels matched I felt there was too much of a difference in sound between the two to be usable for a fair comparison.

What it says on bottom of the iCAN is to turn the headphone volume down if the headphone is not plugged in. Makes no sense to me why, but I do it anyway.

Cheerio Rich

 

I do notice a different on iDAC when both RCA and headphone-out are connected at the same time. The RCA (line-out) is internally connected to the amp section (only make sense that way), so if both are connected at the same time, output voltage (from the DAC chip) will drop because you will have a parallel connection. Basically the line-out is feeding two non-identical load: one to the headphone-out and another to whatever you have connected to the RCA. The less resistant of the two will 'see' more voltage.

 

The volume pot is likely placed just after the DAC chip and before the headphone amp section. Turning it all the way down means turning the resistance all the way up, and therefore stopping voltage from going into the headphone amp section but go to the RCA jacks instead.

 

Quote:
Originally Posted by mrinspire View Post

I don't think hooking up a speaker with iCAN is suitable, and any differences should be minimal, it is better and worth you invested on a better DAC


He has the iDAC as well, so it will be better to hook the speaker to the RCA out of the iDAC directly. Obviously it means more works if he is feeding the RCA to the iCAN as well.

post #97 of 295
Hello

I have question for you guys;
Is that any problem if I would like to use my rsa predator like usb dac amp + ifi amp?
I don't have just single dac yet frown.gif
Thanks for the advice
post #98 of 295
I'm just worried about the double amplified sound, but I still miss the clarity, dynamic.
Edited by ksk75 - 4/28/13 at 1:33am
post #99 of 295
Thread Starter 
Quote:
Originally Posted by ClieOS View Post

 

I do notice a different on iDAC when both RCA and headphone-out are connected at the same time. The RCA (line-out) is internally connected to the amp section (only make sense that way), so if both are connected at the same time, output voltage (from the DAC chip) will drop because you will have a parallel connection. Basically the line-out is feeding two non-identical load: one to the headphone-out and another to whatever you have connected to the RCA. The less resistant of the two will 'see' more voltage.

 

The volume pot is likely placed just after the DAC chip and before the headphone amp section. Turning it all the way down means turning the resistance all the way up, and therefore stopping voltage from going into the headphone amp section but go to the RCA jacks instead.

 


He has the iDAC as well, so it will be better to hook the speaker to the RCA out of the iDAC directly. Obviously it means more works if he is feeding the RCA to the iCAN as well.

I see, thanks for clarying this, but iCAN can act as a pre-amp?

post #100 of 295
Thread Starter 
Quote:
Originally Posted by ksk75 View Post

Hello

I have question for you guys;
Is that any problem if I would like to use my rsa predator like usb dac amp + ifi amp?
I don't have just single dac yet frown.gif
Thanks for the advice

What cans are you driving?

post #101 of 295
Thanks but I allready tried smily_headphones1.gif
Hd 650
I'm just amazed :-D
post #102 of 295
Quote:
Originally Posted by ksk75 View Post

Hello

I have question for you guys;
Is that any problem if I would like to use my rsa predator like usb dac amp + ifi amp?
I don't have just single dac yet frown.gif
Thanks for the advice


I used to use a Pico DAC/amp feeding a Predator. I did not find that I lost any SQ from the double amping. I also now use a Tera which has a built in amp feeding the iCAN and that sounds amazing.

 

I read somewhere that any DAC adds some kind of amplification to the signal, so that it is not really that different to have a DAC/amp driving another amp. The Centrance Dacport USB DAC I tried once could drive my headphones with plenty of volume without an amp, and I controlled the level with the volume control on my computer.

 

Sounds like you already tried the Predator as DAC and like it, and that is what matters. I also have read that it is best to max out the volume on the DAC/amp and then use the volume control on the main amp to adjust the level. That is supposed to make for the cleanest signal.  I am not sure what gain level would be best to use on the Predator, but I would probably just use the low gain if that is enough signal for the iCAN.


Edited by Nirmalanow - 4/28/13 at 7:07am
post #103 of 295
Quote:
Originally Posted by mrinspire View Post

I see, thanks for clarying this, but iCAN can act as a pre-amp?

It can act like a pre-amp, but it is not really designed as pre-amp.

 

Quote:
Originally Posted by ksk75 View Post

I'm just worried about the double amplified sound, but I still miss the clarity, dynamic.

Set the volume on Predator to relatively high should avoid issue with dynamic. It can be used that way, but I doubt it is better than a good standalone DAC.

post #104 of 295
Thanks to sharing this :-)
I did as you wrote
Pc 80%volume
Rsa low gain full volume
And volume controlled on the ifi

I got shiny dinamic (for me) pure clear sound
post #105 of 295
I'm sad a little bit because my english is not that good yet to describe what I got, rsa p. + ifi amp + hd650.

Maybe one story from today;
I went to help for my mate to fix his laptop probs, when it was done I connected the "rig".
He is an Indian guy not really music lover but he was interested. (Maybe because I helped him :-)
First I showed him some detailed music - he was amazed,
Then I told him just help yourself search on the youtube and preferd the hq (at least:-)
He got some Indian music...
After 3 min. listening he started to drying his eyes, he almost cryed. I know him he is not that women style boy.
Just the music touched him, he never heard this quality.

I was happy to gave this experince for him.
Edited by ksk75 - 4/28/13 at 10:30am
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