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Question about the Nuforce Icon HDP

post #1 of 15
Thread Starter 

I have an urgent question to ask... I ordered a DAC that I think I might not need at all.

 

The USB part of my HDP doesn't work (the circuit went out due to voltage changes). However, the rest of the knobs (Digital and Analog) work. Currently, I am connecting the AUX cable to the HDP as an amplifer.

 

The QUESTION is: I put the HDP knob to Analog, I know the headphone is getting amplified, but is it also using its DAC feature? Or is it just purely amplifying it without using the DAC feature within the HDP?

 

Could someone please help me out... I would be truly grateful because there's around $100 at stake.

 
 
Sorry, if I already posted the same thing.
post #2 of 15

The DAC isn't being used if the analog input is selected; moreover, there isn't even any cable connected to the digital input, right?

post #3 of 15
Thread Starter 
Quote:
Originally Posted by ProtegeManiac View Post
 

The DAC isn't being used if the analog input is selected; moreover, there isn't even any cable connected to the digital input, right?

 

I'm really sorry, I am not sure. Here is a picture, could you have a look please?

 

 

I put the AUX cable into the hole that says "LINE IN OPTICAL". So is there a cable connected to the digital input? Also, could you confirm again that the DAC isn't being used at all? Thank you very much.


Edited by 1200249 - 6/14/14 at 9:11am
post #4 of 15
Quote:
Originally Posted by 1200249 View Post

 

I put the AUX cable into the hole that says "LINE IN OPTICAL". Could you confirm again that the DAC isn't being used at all? Thank you very much.

 

I assume the AUX cable you're using is the same as for most mobile devices, which have a 3.5mm plug on both ends, but just to make sure, post a picture of it too. If that 3.5mm socket is purely an optical input (as there are compatible 3.5mm TRS-type sockets for these), then no signal will come out, and you'd need a 3.5mm to RCA cable to hook up your mobile device to the analog RCA inputs on the HDP.

 

If for example it still produces sound, provided one end of it is hooked up to an analog line out (like on a portable player, or a computer's earphone output), then that means the 3.5mm socket on the HDP is a combo jack, in the same way that some laptops used to output both analog audio straight to earphones or (with an adapter) digital audio through the same port on the laptop. It cannot possibly take an analog signal and just send it through and use its DAC section because it's an analog signal, unless it has an ADC. A Digital to Analogue Converter - whether the whole device, a part of it, or specifically just the DAC chip - takes the 10010101000010101110001111000101011 signal and turns it into an analogue electrical signal that your amplifier - whether an independent unit, or a section of one - will then amplify that signal to be able to drive headphones or speakers. The only way you can send an analog signal through a DAC is to use an analogue to digital converter chip first, and barring certain applications like recording, is a very round-about way of routing a signal and is therefore not likely done.

 

It is likely that the knob can select analog so the path from that combo jack will be selected depending on what signal is going into it.

post #5 of 15
Thread Starter 
Quote:
Originally Posted by ProtegeManiac View Post
 

 

I assume the AUX cable you're using is the same as for most mobile devices, which have a 3.5mm plug on both ends, but just to make sure, post a picture of it too. If that 3.5mm socket is purely an optical input (as there are compatible 3.5mm TRS-type sockets for these), then no signal will come out, and you'd need a 3.5mm to RCA cable to hook up your mobile device to the analog RCA inputs on the HDP.

 

If for example it still produces sound, provided one end of it is hooked up to an analog line out (like on a portable player, or a computer's earphone output), then that means the 3.5mm socket on the HDP is a combo jack, in the same way that some laptops used to output both analog audio straight to earphones or (with an adapter) digital audio through the same port on the laptop. It cannot possibly take an analog signal and just send it through and use its DAC section because it's an analog signal, unless it has an ADC. A Digital to Analogue Converter - whether the whole device, a part of it, or specifically just the DAC chip - takes the 10010101000010101110001111000101011 signal and turns it into an analogue electrical signal that your amplifier - whether an independent unit, or a section of one - will then amplify that signal to be able to drive headphones or speakers. The only way you can send an analog signal through a DAC is to use an analogue to digital converter chip first, and barring certain applications like recording, is a very round-about way of routing a signal and is therefore not likely done.

 

It is likely that the knob can select analog so the path from that combo jack will be selected depending on what signal is going into it.

 

Thank you very much for the confirmation. So basically, do I need a separate DAC? Or is there another way to activate the DAC feature within the HDP-->by turning the knob to Digital and connecting the optical cable from my Macbook Pro to the HDP (??I'm not entirely sure??) ?

 

Here is my picture of the AUX cable, I think it is the correct one, as you mentioned.

 

 

I appreciate your help.

post #6 of 15

I think you're using the wrong cable. You're sending an "aux" to a optical coax input, which are not the same things. 

 

I think you'll need a 3.5 mm to RCA cable (very cheap on Monoprice.com). You'll plug in the 3.5mm end to your HDP "aux" output, and then plug in the RCA cables to the right of the yellow "COAXIAL" input on the Icon.


Edited by thievesarmy - 6/14/14 at 1:53pm
post #7 of 15

It might be good if you can post ALL the equipment you currently have, and then what exactly you're trying to accomplish. Would be happy to help you out, but your posts are kind of confusing. Also what is the DAC you bought that you think you may not need?

post #8 of 15
Thread Starter 
Quote:
Originally Posted by thievesarmy View Post
 

I think you're using the wrong cable. You're sending an "aux" to a optical coax input, which are not the same things. 

 

I think you'll need a 3.5 mm to RCA cable (very cheap on Monoprice.com). You'll plug in the 3.5mm end to your HDP "aux" output, and then plug in the RCA cables to the right of the yellow "COAXIAL" input on the Icon.

 

To clarify your suggestion, I should put get the 3.5mm to RCA cable and connect the 3.5mm to the Macbook Pro/ and the RCA to the HDP?

 

 

Quote:
Originally Posted by thievesarmy View Post
 

It might be good if you can post ALL the equipment you currently have, and then what exactly you're trying to accomplish. Would be happy to help you out, but your posts are kind of confusing. Also what is the DAC you bought that you think you may not need?

 

My entire equipment is comprised of the Nuforce Icon HDP, Macbook Pro Retina, Sennheiser HD650 and an AUX cable.

post #9 of 15

alright, now we are getting somewhere. Yes, you were using the wrong cable.

 

You can either do what I suggested above, with a mini 3.5mm to RCA, although that will NOT use the DAC in your Icon. If you want to do that, you'll need to get yourself one of these: http://www.monoprice.com/Product?c_id=102&cp_id=10229&cs_id=1022903&p_id=1554&seq=1&format=2

 

they make multiple lengths, so just get the shortest one that will work for your setup

 

run one end from your MBP headphone out, and plug the other end into the "Line In Optical" on your Icon.

 

plug your headphones into your Icon HDP and voila. 

 

EDIT: just noticed that cable is out of stock on Monoprice. You can either get notified when its back, or get one from another place. They are cheap tho, so it doesn't really matter where you get it from.


Edited by thievesarmy - 6/14/14 at 6:33pm
post #10 of 15
Thread Starter 
Quote:
Originally Posted by thievesarmy View Post
 

alright, now we are getting somewhere. Yes, you were using the wrong cable.

 

Get yourself one of these: http://www.monoprice.com/Product?c_id=102&cp_id=10229&cs_id=1022903&p_id=1554&seq=1&format=2

 

they make multiple lengths, so just get the shortest one that will work for your setup

 

run one end from your MBP headphone out, and plug the other end into the "Line In Optical" on your Icon.

 

plug your headphones into your Icon HDP and voila. 

 

Sorry for my newbness, but isn't it a 5.0mm to 5.0mm cable? Both of my jacks (Macbook Pro/HDP) have 3.5mm. Will the cables you've mentioned above fit?

post #11 of 15

yes, they'll fit. The jacks are a little longer than 3.5mm, but the diameter of the holes are the same. I have a MBP Retina and use that cable almost every day running out to my DAC.

post #12 of 15
Thread Starter 
Quote:
Originally Posted by thievesarmy View Post
 

yes, they'll fit. The jacks are a little longer than 3.5mm, but the diameter of the holes are the same. I have a MBP Retina and use that cable almost every day running out to my DAC.

 

Oh wow.... thank you very much to you and ProtegeManiac! You guys have just saved me a hundred dollars! I will get the cable immediately.

post #13 of 15
Thread Starter 

Oh I'm terribly sorry, but I don't think I have the money nor the time to order it online because I reside outside of the US and I need this urgently. Is monoprice the only manufacturer who provides such cables?

 

Also, can I just use a regular Toslink cable with two Toslink to Mini-adapter on both of the ends?

post #14 of 15
Yes that will work. No mono price is far from the only one that makes those cables. Just google it, or use a regular toslink with the mini adapters.
post #15 of 15
Thread Starter 
Quote:
Originally Posted by thievesarmy View Post

Yes that will work. No mono price is far from the only one that makes those cables. Just google it, or use a regular toslink with the mini adapters.

Oh I see. Thank you very much for your time and help. I will be getting those cables within an hour or two!

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