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HE-500, LCD2, D5000, DT770, SR80, on a speaker amp (Emotiva mini-X A-100) Project - Page 139

post #2071 of 3626
Quote:
Originally Posted by manbear View Post
 

Does anyone have any idea as to how long the current Emotiva sale will continue? I am debating getting this for my HE-400. Seems like overkill, but the price is so good compared to other SS amps. 

When I had the HE-400, I got the Mini-X a few weeks prior to picking up the HE-500 so I got to trial it exclusively with the HE-400 for a bit.  From my personal experience, I think it is indeed a bit overkill unless you are already planning on upgrading.  You also won't have much play on the volume knob - the HE-400 is quite efficient.  What are you currently using with your HE-400?

post #2072 of 3626
Quote:
Originally Posted by modulor View Post
 

When I had the HE-400, I got the Mini-X a few weeks prior to picking up the HE-500 so I got to trial it exclusively with the HE-400 for a bit.  From my personal experience, I think it is indeed a bit overkill unless you are already planning on upgrading.  You also won't have much play on the volume knob - the HE-400 is quite efficient.  What are you currently using with your HE-400?


Since you've used the HE-400 with the Emotiva, I have a question that I'm going to ask at the beginning: Did you have any hiss issues with your HE-400?

Anyway, I posted a few pages back, but this thread is enormous. I'm currently using the HE-400 with a Little Dot Mk3, which is an OTL tube amp and probably a bit underpowered for orthos with their low impedance.

Malveaux advised that adding a resistor could help bring the impedance of the HE-400 into a better operating range for my Little Dot amp. I ordered a cheap 300-ohm resistor that's inside a 1/8 to 1/4 inch adapter plug (currently en route from Hong Kong). I looked at BTG audio for an impedance adapter, but I'm going to hold off on that option for now, until I decide what amp I might get next. I might want to get a resistor in a full headphone cable instead of just an adapter. In any case, it seems like an impedance adapter will get me more volume play on the Emotiva, and I'm also not afraid of using digital volume control if need be. 

FWIW, someone in another thread said that he listened to the HE-400 on the Emotiva at around 12 o'clock, which doesn't sound too bad to me. 

I know I should probably wait until I get a chance to use the impedance adapter on my current amp, but there is the issue of the sale ending. I've also been toying with the idea of getting a nice SS amp for a while, just for a change. The best SS amp I've heard was a Cmoy, so I'm curious.

I wouldn't say that I'm unhappy with my current amp, I've just got that itch, you know? My biggest complaint is that the sound is just a little too smooth (mushy?) sometimes. I sometimes feel like some attack and speed is missing when I turn it up. I'm also wondering if I'm getting the most controlled bass response with my current amp. I like what people are saying about separation and black space on the Emotiva too. I listen to a lot of bassy and complex electronic music. 

I've been looking at Audio-GD as well, but they are so much more expensive than the Emotiva. Also considering the Schiit Vali, but I'm not sure if this will be different enough from my current amp. Thought about the Magni and O2, but I've seen too many people call them bright (no flaming please... IDK if they are bright, but I don't like bright, so just the fact that some people think they are bright is enough to turn me off). 

I have no plans of upgrading my headphones in the near future, as I just got the HE-400 and am loving them. 

post #2073 of 3626
Quote:
Originally Posted by manbear View Post

Does anyone have any idea as to how long the current Emotiva sale will continue? I am debating getting this for my HE-400. Seems like overkill, but the price is so good compared to other SS amps. 

It's a Halloween sale. So it will end soon. At least that's what a sales rep told me.

Don't debate just do it. You won't find better for the price.
post #2074 of 3626
Quote:
Originally Posted by manbear View Post
 


Since you've used the HE-400 with the Emotiva, I have a question that I'm going to ask at the beginning: Did you have any hiss issues with your HE-400?

Anyway, I posted a few pages back, but this thread is enormous. I'm currently using the HE-400 with a Little Dot Mk3, which is an OTL tube amp and probably a bit underpowered for orthos with their low impedance.

Malveaux advised that adding a resistor could help bring the impedance of the HE-400 into a better operating range for my Little Dot amp. I ordered a cheap 300-ohm resistor that's inside a 1/8 to 1/4 inch adapter plug (currently en route from Hong Kong). I looked at BTG audio for an impedance adapter, but I'm going to hold off on that option for now, until I decide what amp I might get next. I might want to get a resistor in a full headphone cable instead of just an adapter. In any case, it seems like an impedance adapter will get me more volume play on the Emotiva, and I'm also not afraid of using digital volume control if need be. 

FWIW, someone in another thread said that he listened to the HE-400 on the Emotiva at around 12 o'clock, which doesn't sound too bad to me. 

I know I should probably wait until I get a chance to use the impedance adapter on my current amp, but there is the issue of the sale ending. I've also been toying with the idea of getting a nice SS amp for a while, just for a change. The best SS amp I've heard was a Cmoy, so I'm curious.

I wouldn't say that I'm unhappy with my current amp, I've just got that itch, you know? My biggest complaint is that the sound is just a little too smooth (mushy?) sometimes. I sometimes feel like some attack and speed is missing when I turn it up. I'm also wondering if I'm getting the most controlled bass response with my current amp. I like what people are saying about separation and black space on the Emotiva too. I listen to a lot of bassy and complex electronic music. 

I've been looking at Audio-GD as well, but they are so much more expensive than the Emotiva. Also considering the Schiit Vali, but I'm not sure if this will be different enough from my current amp. Thought about the Magni and O2, but I've seen too many people call them bright (no flaming please... IDK if they are bright, but I don't like bright, so just the fact that some people think they are bright is enough to turn me off). 

I have no plans of upgrading my headphones in the near future, as I just got the HE-400 and am loving them. 

I did experience a noise floor (not really hissing so much as a faint hum) with no music playing or in silent passages.  It was not detectable otherwise, but it was a bit more apparent with the HE-400 vs the HE-500.

 

You should get more power if your LD MKIII sees a more resistive load.  I've also had a LD MKIII at the same time as my HE-400 at one point too, and I think it fared pretty well stock but I never tried adding resistance into the chain myself.  I did apply the same 500ohm resistors in an adapter to use on the Mini-X that Mal used, but that was right before I got drawn back into tube amps.  That is a possible solution, but overall I'd say it's a bit cumbersome as you'll have to make/source the adapter and the amp is overkill unless you definitely plan on upgrading or using passive speakers with it as well.  I am in no way dismissing it though, I thought it was a very good, capable amp overall.  Just not quite a farcry from the Magni I was A-B comparing it to.  Most SS amps are going to be a bit brighter (unless it deals with certain 'warmer' Op Amps) but comparing to the Magni (previous pairing with the HE-400) it wasn't quite as bright.  Even with the attenuator adapter, I didn't seem to gain as much movement on the pot as I expected, but it was better overall so I would have to say it's recommended to add.  The adapter you've got on the way may actually work well enough too.

 

Between the LD MKII and Mini-X, you'll gain bass weight and refinement in the Mini-X - of the two for electronic music, I'd likely pick the latter.  The HE-400 is quite efficient, so it's still going to sound pretty good on the LD MKIII.  I may not be the best judge, but I felt that the bass was perceivably better with the Mini-X.

 

I'm curious about all this talk of amp cards the past few pages, those based on Tripath design and such...they seem pretty affordable, so I may have to get one just out of curiosity.  Have you read into any of those?  The Topping TP10 / TP20 / TP21 look really good, as well as the SMSL SA-36A - all very cost efficient too.  Just another thought, so maybe check around on that though as I have no idea how it will pair with an HE-400 but the output power seems about right to me.

post #2075 of 3626
Quote:
Originally Posted by manbear View Post
 

Does anyone have any idea as to how long the current Emotiva sale will continue? I am debating getting this for my HE-400. Seems like overkill, but the price is so good compared to other SS amps. 


knowing he-400 sound signature and knowing that it's very sensitive I think EF-5 may be killer amp for this and emotiva does not make any sense here (+ you can easily experience hissing with that sensitivity so total mistake in my opinion, I would not risk even he-500 with emotiva with my sensitive hearing, that's why I ordered it only for HE-4/HE-6 the taughest to drive hifimans orthos these days, chance of humm/buzz/hissing is ultra small)

post #2076 of 3626
Quote:
Originally Posted by DaemonSire View Post
 

I notice a very slight hiss with my he500 and a-100.  Extremely minor though to the point that if there is anything else in the room (like the fan from a computer) you can't really hear it.

 

 

 

On another note, I notice that if I put my ear very close to the a-100, I can hear a buzz coming from the toroidal transformer.  Is this normal?  I just picked this up used and wondering if there may be an issue or if it is a common thing.  It doesn't seem to affect the sound or function at all, and I have to literally put my ear to the case to hear it.  Doing a google search, it seems this is common with toroidal transformers?

 

Thanks

 

Hi,

 

I also experienced both the hissing in a quiet room and a slight buzzing noise from the transformer. Without a source connected, increasing the volume pot above 50% do you hear a loud distorted buzzing through the headphones?

 

Like you say, it isn't a huge problem when there's background noise in the room, but knowing it's there makes you wonder if it's affecting the sound signature somewhat.  What gets me scratching my head is some people claim that the a100 is silent with their He-500 - could  just be their hearing though. 

post #2077 of 3626
Quote:
Originally Posted by fluidz View Post
 

 

Hi,

 

I also experienced both the hissing in a quiet room and a slight buzzing noise from the transformer. Without a source connected, increasing the volume pot above 50% do you hear a loud distorted buzzing through the headphones?

 

Like you say, it isn't a huge problem when there's background noise in the room, but knowing it's there makes you wonder if it's affecting the sound signature somewhat.  What gets me scratching my head is some people claim that the a100 is silent with their He-500 - could  just be their hearing though. 

As has been stated several times in this thread.  There is a noise floor with the HE-500.  It's just very low unless the volume knob is up around 2 o'clock or so.  But if you listen at 0 volume with the HE-500 directly hooked up to the amp you should hear a very slight hiss.

post #2078 of 3626
Quote:
Originally Posted by Shazb0t View Post
 

As has been stated several times in this thread.  There is a noise floor with the HE-500.  It's just very low unless the volume knob is up around 2 o'clock or so.  But if you listen at 0 volume with the HE-500 directly hooked up to the amp you should hear a very slight hiss.

 

It was dead silent for me. It was like it wasn't even plugged. Regardless of the knob position. The Audeze's gave me a noise floor though, although much better on the 3's over LCD-2.

post #2079 of 3626

My TA2024 amp is dead silent at full volume with my HE-500s, like Zoom25 said it's just like the cans are unplugged. Max listening volume for me is about 10 o'clock and 5 o'clock is dead silent. The magic of a true push-pull balanced chip amp paired with a properly grounded Canare Star Quad balanced cable and the HE-500.

 

I just tried the TA2024 with the very efficient AKG K240 Studios and there is a barely audible hiss at 4 to 5 o'clock with 5 being max volume.


Edited by robrob - 10/29/13 at 6:35pm
post #2080 of 3626

Your power source and grounding of other components etc...would have a lot to do with hissing/humming detected.  On mine, I can definitely tell when the amp goes from amber to blue when it picks up the signal.  It's definitely not dead silence but no hissing at all.  Just consistent, audible humming when volume knob is beyond 2pm.  The other thing is that the Mini-x doesn't have a 3rd prong plug.  It only runs on 2 prong connection (-), (+).  Technically, this is more prone to having potential noise issue if power source is not clean or other electrical interferences are around.

Have you tried unplugging all signal inputs from the amp to see if the noise/hiss go away?

post #2081 of 3626
Quote:
Originally Posted by koiloco View Post
 

Your power source and grounding of other components etc...would have a lot to do with hissing/humming detected.  On mine, I can definitely tell when the amp goes from amber to blue when it picks up the signal.  It's definitely not dead silence but no hissing at all.  Just consistent, audible humming when volume knob is beyond 2pm.  The other thing is that the Mini-x doesn't have a 3rd prong plug.  It only runs on 2 prong connection (-), (+).  Technically, this is more prone to having potential noise issue if power source is not clean or other electrical interferences are around.

Have you tried unplugging all signal inputs from the amp to see if the noise/hiss go away?


I guess it would be good then to have DAC with 3 prong power connection since emotiva is only 2 (common potential to the ground of the whole audio chain)

 

I had that situation some time ago when DAC was 2 prong and amp was 2 prong either - there was floating common potential and it was very vulnerable especially when I touched the volume knob and changed volume (feedback capacitance through my finger I guess), the easiest way to solve the problem was of course shorting interconnects ground to some ground potential because amp used differential power supply - it was not so easy to do it in other way)

 

it was with chinese amp with some cheap, pulse, 2 prong power supply, what's worse it had about 90V AC on that "floating ground" when I took some measurements ... no comment, it's usually not so good when neither of components use 3 prong power supply connection but If there are too many - it's not so good too - you risk ground loop (the best option is when only 1 component uses 3 prong connection - usually it's the amp)

 

I have my audio-gd dac 10es2 3 prong so it should be fine with 2 prong emotiva amp - I will let you know ASAP


Edited by magicman - 10/29/13 at 12:41pm
post #2082 of 3626

^ cool.  Definitely worth a test to find out.

post #2083 of 3626

 I believe that Emotiva uses  2 prong power cord on this amp is to lower the risk of a ground loop. I had my share of ground loops in the past. Some three prong  pro audio equipment have a ground lifter switch on the back. I just receive my mini-X A-100.  Setting it up for now.

post #2084 of 3626
Quote:
Originally Posted by koiloco View Post

Your power source and grounding of other components etc...would have a lot to do with hissing/humming detected.  On mine, I can definitely tell when the amp goes from amber to blue when it picks up the signal.  It's definitely not dead silence but no hissing at all.  Just consistent, audible humming when volume knob is beyond 2pm.  The other thing is that the Mini-x doesn't have a 3rd prong plug.  It only runs on 2 prong connection (-), (+).  Technically, this is more prone to having potential noise issue if power source is not clean or other electrical interferences are around.
Have you tried unplugging all signal inputs from the amp to see if the noise/hiss go away?
I can also tell when it picks up the signal from amber to blue. Amber is silent, blue introduces a very slight hum at 0 volume.

I don't know if maybe it's the music at a really low volume because the pot at 0 doesn't stop the signal or if that's just the hum people mention.
Edited by Shazb0t - 10/29/13 at 2:59pm
post #2085 of 3626

I have a couple of questions regarding the emotiva and the HE-500. First of all, is it necessary to have a preamp? Second of all, I would be using it from a asus xonar essence stx and considering that I'm relatively new to this, how would I hook it up?

 

Edit: I do have a banana plug btw.

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