HE-500, LCD2, D5000, DT770, SR80, on a speaker amp (Emotiva mini-X A-100) Project - Page 41

KP,

The first two links go to the same product.

Mike

Quote:

Originally Posted by zilch0md 

KP,

 

The first two links go to the same product.

 

 

Mike

Woops... corrected and thank you.

KP

Quote:

Originally Posted by TheKillerPiglet 

20 bucks total from Amazon, giving it a shot.

 

http://www.amazon.com/gp/product/B00005T3G5/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A2BC0LW6HPSTVP

 

http://www.amazon.com/gp/product/B000068O5B/ref=oh_details_o02_s00_i00

 

http://www.amazon.com/gp/product/B003U48NIY/ref=oh_details_o01_s00_i00

 

KP
 

There's still a problem:  The second link goes to an adapter that has a 1/4-inch mono headphone jack (instead of stereo).

I haven't found a 1/4-inch stereo equivalent at Amazon, searching for "1/4-inch," "6.3mm," or "6.35mm".

Mike

Quote:

Originally Posted by zilch0md 

 

There's still a problem:  The second link goes to an adapter that has a 1/4-inch mono headphone jack (instead of stereo).

 

 

I haven't found a 1/4-inch stereo equivalent at Amazon, searching for "1/4-inch," "6.3mm," or "6.35mm".

 

Mike

Sadly not a mistake, seems I ordered that... quickly ordering:

http://www.amazon.com/Planet-Waves-Female-Stereo-Coupler/dp/B0002E52S4/ref=pd_sim_e_6

http://www.amazon.com/Parts-Express-Stereo-Female-Adapter/dp/B000TTHVYK/ref=lh_ni_t?ie=UTF8&psc=1

KP

is there anything wrong with just running the audio out of the emotiva into this adapter as opposed to the banana plugs adapter?

Quote:

Originally Posted by mac336 


How exactly is the xlr safer?

"Yes, for all headphones, you ultimately have two conductors going to each ear, but when the ground of each pair is joined to a 3-conductor 3.5mm or 6.3mm TRS plug, it's a given that you will be inserting that plug into the TRS jack of an amplifier that is designed to work with a common ground (unbalanced, single-ended), three-conductor output jack.

But a speaker amp is (Edit: might be) designed to work with segregated grounds. It's not safe to assume that you can connect the two grounds of four speaker terminals, to reduce four conductors down to only three."

http://www.head-fi.org/t/629352/hifiman-he-500-on-a-speaker-amp-emotiva-mini-x-a-100-project/360#post_8919958

Quote:

Originally Posted by zilch0md 

Are you thinking of the APPJ Headphone Adapter that I discussed on page 24 of this thread?

 

It seems that ALO is no longer carrying the product.  The link I provided in that post is now dead and searching the ALO site just now, I can no longer find the product, but I've updated that post with another source you might try.  

 

Mike

Thanks, it's exactly that one. I remembered it as being sold by Alo, but as you said it's not available anymore. Seemed like a nice way to drive more sensitive headphones from a speaker amp.

Quote:

Originally Posted by Anda 

 

"Yes, for all headphones, you ultimately have two conductors going to each ear, but when the ground of each pair is joined to a 3-conductor 3.5mm or 6.3mm TRS plug, it's a given that you will be inserting that plug into the TRS jack of an amplifier that is designed to work with a common ground (unbalanced, single-ended), three-conductor output jack.

But a speaker amp is (Edit: might be) designed to work with segregated grounds. It's not safe to assume that you can connect the two grounds of four speaker terminals, to reduce four conductors down to only three."

 

http://www.head-fi.org/t/629352/hifiman-he-500-on-a-speaker-amp-emotiva-mini-x-a-100-project/360#post_8919958

Hey Anda,

You're singing my song - I was beating that same drum a while back, in this thread.  I, too, was unwilling to make that assumption.  Good for you for pointing it out.

But I wrote Emotiva and asked them if it was safe to do so, even after someone provided us with a schematic that showed the speaker taps having a shared ground.  Emotiva support said it's OK to short the grounds of the speaker taps, because they are indeed, already shorted (shared) internally.

Thanks for watching out for your fellow Head-Fiers!  

We should still take note that just because it's safe to connect a single-ended headphone to the Emotiva speaker taps, that doesn't mean we don't have to research other speaker amps, before we try it with them.

Mike

For an amp that has separate grounds for each channel, could one feasibly make a headphone tap that connects to the ground on just one side? Any downsides to doing so, or risk damaging the amp?

Quote:

Originally Posted by Armaegis 

For an amp that has separate grounds for each channel, could one feasibly make a headphone tap that connects to the ground on just one side? Any downsides to doing so, or risk damaging the amp?

I would only just be guessing if I tried to answer that one, even though the idea sounds appealing.  

The safe bet, again, is to ask the manufacturer of that specific amp.

Quote:

Originally Posted by Armaegis 

For an amp that has separate grounds for each channel, could one feasibly make a headphone tap that connects to the ground on just one side?

Nope. Won't work. Each headphone driver would need to be connected to its respective channel's hot and ground. If you connected both drivers' grounds to just one of the amp channel's ground, only one driver would be working.

se

Really? Assuming that the amp ground is zero, shouldn't that be generating the proper voltage difference between both channels in the headphone? 

I suppose that without a common (shared) ground, each side of the amp knows nothing of the other, and thus, it's like two mono amps.  

And if you plug two wires into one mono amp, but only one wire into the other mono amp, you'll only hear music at the mono amp where you connected both wires.

But both "hot" signal wires are still referencing to a ground. That should be producing sound from both sides no? 

Quote:

Originally Posted by Armaegis 

But both "hot" signal wires are still referencing to a ground. That should be producing sound from both sides no? 

I'm not an EE and I don't have enough information to venture a guess.  I personally would want to call the manufacturer and ask them what's possible.