or Connect
Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › MrSpeakers Alpha Dog Revealed! - The World's First Production 3D-Printed Headphones
New Posts  All Forums:Forum Nav:

MrSpeakers Alpha Dog Revealed! - The World's First Production 3D-Printed Headphones - Page 283

post #4231 of 9033

I think you are right as well.  My Decware Taboo amp is not a true balanced headphone amplifier though it has both single-ended and balanced outputs.  With that said there is probably a larger off-topic debate about single-ended vs balanced amps.   

 

 

Quote:

Originally Posted by sunneebear View Post
 

Don't see the harm in that.  Putting a SE adapter on a true balance amp would be bad.  I'm no expert but I think that is a no no.

post #4232 of 9033

A balanced amp's balanced output MUST be used with a balanced cable/headphone, otherwise you are taking two active outputs from different channels and summing them together to a common point for both drivers that substitutes for ground, it's essentially the same as trying to wire the L and R output of a regular amp to one channel of your headphone.  It might not harm the amp (or it might depending on the amp, so exercise real caution) and it will definitely sound very strange.  

 

A single ended amp can be used with a balanced headphone using an adaptor or appropriate cable, there's no downside at all.  

 

FWIW: recording studios like balanced gear because it intrinsically reduces pickup of hum and electrical noise/RFI through the long runs of wire that are used in the studios.  This is usually not terribly relevant to headphone DACs and amps (or it shouldn't be with a proper amp) with short cable runs and less electrically noisy environments.  That said, there is a more subtle secondary effect of truly balanced equipment: it tends to cancel at least some distortion artifacts if the circuit is fully symmetric.  That's theoretical though, and I don't know if it's ever been measured.  

 

For the Alphas, I personally have three single ended and three balanced amps, and each has it's own merits.  I feel that balanced vs single-ended is secondary to the quality of the amp circuit, power supply, and build quality.  You can find great amps with either topology, so focus on the sound you want, not balanced vs SE.   


Edited by mrspeakers - 12/2/13 at 9:51pm
post #4233 of 9033
Quote:
Originally Posted by mrspeakers View Post

A balanced amp's balanced output MUST be used with a balanced cable/headphone, otherwise you are taking two active outputs from different channels and summing them together to a common point for both drivers that substitutes for ground, it's essentially the same as trying to wire the L and R output of a regular amp to one channel of your headphone.  It might not harm the amp (or it might depending on the amp, so exercise real caution) and it will definitely sound very strange.  

A single ended amp can be used with a balanced headphone using an adaptor or appropriate cable, there's no downside at all.  

FWIW: recording studios like balanced gear because it intrinsically reduces pickup of hum and electrical noise/RFI through the long runs of wire that are used in the studios.  This is usually not terribly relevant to headphone DACs and amps (or it shouldn't be with a proper amp) with short cable runs and less electrically noisy environments.  That said, there is a more subtle secondary effect of truly balanced equipment: it tends to cancel at least some distortion artifacts if the circuit is fully symmetric.  That's theoretical though, and I don't know if it's ever been measured.  

For the Alphas, I personally have three single ended and three balanced amps, and each has it's own merits.  I feel that balanced vs single-ended is secondary to the quality of the amp circuit, power supply, and build quality.  You can find great amps with either topology, so focus on the sound you want, not balanced vs SE.   
This is great information for all Head-Fiers; should be stickyed somewhere.
post #4234 of 9033
Quote:
Originally Posted by mrspeakers View Post

A balanced amp's balanced output MUST be used with a balanced cable/headphone, otherwise you are taking two active outputs from different channels and summing them together to a common point for both drivers that substitutes for ground, it's essentially the same as trying to wire the L and R output of a regular amp to one channel of your headphone.  It might not harm the amp (or it might depending on the amp, so exercise real caution) and it will definitely sound very strange.  

A single ended amp can be used with a balanced headphone using an adaptor or appropriate cable, there's no downside at all.  

Thanks, Dan. My problem is solved clearly. Could I change the order? I choose the SE cable but want to get the balanced one, and could I buy a adapter?
post #4235 of 9033

Sure, just PM the order info to me and I'll change it.  You're on your own for the adaptor, but I suspect it's easy to get from Moon Audio, BTG, Headphone Lounge and others.

post #4236 of 9033
Thanks- Dan. I'll send a PM wink.gif
post #4237 of 9033
post #4238 of 9033
I tried demo pair of AD with both included cables while using Moon Audio Blue Dragon adapter for the cable terminated with 4 pin XLR but herd no any improvement over provided SE cable but I heard slight difference when connected to speakers taps but I preferred some recording with speakers taps and some with SE cable
post #4239 of 9033
Quote:
Originally Posted by olegausany View Post

I tried demo pair of AD with both included cables while using Moon Audio Blue Dragon adapter for the cable terminated with 4 pin XLR but herd no any improvement over provided SE cable but I heard slight difference when connected to speakers taps but I preferred some recording with speakers taps and some with SE cable

 

And what amp/DAC were you using?

post #4240 of 9033

VERY EARLY IMPRESSIONS:

 

Just received the tour pair from the mail man. In terms of comfort/fit, and appearance it rates very highly. As for the build, it seems very good overall, but the point where the cable splits into a Y seems a little fragile to me. The cable is so thick though, it's ridiculous. I've never used a custom cable before so to me this thing just seems monstrous, I'm sure it's overkill.

 

Now onto the sound, this will all be compared to my modded AKG Q701 on the same amp/DAC. My initial thought after only about 30-45 minutes is that I prefer my modded Q701. It's probably mostly because of the soundstage. Anytime I try to compare any closed headphone to my Q, I just can't seem to enjoy it. Comparing the two, the Q701 still sounds huge and airy which I will admit is a huge requirement for me. My Q's to me almost sound speaker like and the AD just isn't doing the same thing for me. The AD also seems a bit dark and a tad bass heavy compared to what I'm used to, which again, could still just be a side effect of it being a closed headphone. I hate to use the word "congested", but again, comparing the two this is kind of how I hear it. The overall frequency response isn't bad though, the low sub-bass is quite nice. There is also a spot in the mid-range that on some recordings seems a bit annoying, I'm not sure what frequency it is yet though, but it's probably a cup resonance that just probably can't be fixed. The sound here is very detailed and pretty fast though for a closed headphone.

 

AGAIN, THESE ARE VERY EARLY IMPRESSIONS... MORE TO COME LATER.

 

Also, does anybody know if anybody on the tour had adjusted the bass screws? I kind of have a feeling that these have more bass than they should.

 

EDIT: I don't want anybody to think that I think these are terrible, because they aren't. I'm just a soundstage junkie and prefer open headphones. I will say that some people have hyped the details of how big the stage is on these. The stage sounds about as big as I remember the HD650 sounding which is decent. For those that have never heard a Q701, especially a modded one, the soundstage of the Q701 is well above average in size. I must also add that the isolation on the AD is pretty insane which is great for people looking for that.  


Edited by jasonb - 12/3/13 at 9:57am
post #4241 of 9033
Nope, I didn't adjust the bass screws at all so that people can listen to the Alpha Dog the same way I did. But yeah that's what I thought of the Alpha Dog's bass too compared to the SRS-2170 and K 701 I have around.
post #4242 of 9033

@jasonb,  coming from even a modded Q701, you will for sure feel that the bass on the AD is a tad heavy and too much; being a closed pair of HP would somewhat double this effect for you at the same time.  Give your ears some time to adjust to the new sound signature of the AD.  Don't swap back and forth too much.  I would personally listen to the AD for a day or 2 straight.  You know your modded Q701 too well already.  Find out what the AD has to offer first before comparing.  Let us know.  Thx.

post #4243 of 9033
Quote:
Originally Posted by koiloco View Post
 

@jasonb,  coming from even a modded Q701, you will for sure feel that the bass on the AD is a tad heavy and too much; being a closed pair of HP would somewhat double this effect for you at the same time.  Give your ears some time to adjust to the new sound signature of the AD.  Don't swap back and forth too much.  I would personally listen to the AD for a day or 2 straight.  You know your modded Q701 too well already.  Find out what the AD has to offer first before comparing.  Let us know.  Thx.

Yup, I will definitely listen more and give them a fair chance. I just wanted to document my initial impressions, which are just that, initial. I will keep reporting back with more.

post #4244 of 9033

Dan sent me a PM telling me how to reset it, but this is what the port looks like right now. It looks like it's a little more than half open. Can anybody confirm or deny that anybody on the tour messed with it? Miceblue says he didn't, but I think like 9-10 other people had this pair before me.


Edited by jasonb - 12/3/13 at 10:57am
post #4245 of 9033

That looks pretty open.  A small percentage leave the factory like that, but not too many.  It's a function of each individual driver, so there's no guarantee what is right just by looking.

 

If there's not a white sticker with the port adjustment on top of the leather strap, I would suggest you make a post-it note of how many turns it takes to close the hole for each channel (e.g. 3.5) then back it out about 2/3 as far as it shows in your photo to seen if that sounds more balanced to you. 

 

Most of the phones are set between 1.5 and 2.25 turns open.  The channels are not always the same, so be sure to note both channels.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphones (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › MrSpeakers Alpha Dog Revealed! - The World's First Production 3D-Printed Headphones