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Meier Audio Quickstep (also Stepdance and 2Stepdance) Discussion and Impressions Thread - Page 147

post #2191 of 2790

Hi precsmo,

 

Quote:
Originally Posted by precsmo View Post

Hi all, my Quickstep is on the way, waiting hard next week!!! Can someone please advice, is the 9v vs 15v make any SQ difference to sensitive CIEM too?? I really hope not, because the priority of the Quickstep is entirely for my CIEM, and it is not very logic to feeding 15v for optimum performance vs portability. Please someone advice.

 

Quote:
Originally Posted by cooperpwc View Post

precsmo, good 9 volt rechargables will be just fine. That is all that I ever used with my Stepdance and the ES5.

 

Don't get me wrong. I love that Mike (zilchmod) and others pursue that extra edge, but especially for CIEM, you will be very happy not doubling or tripling the size and weight of the Quickstep.   ;-)

You just bought a spectacular highly portable amp.  beerchug.gif

 

 

According to my interpretations/extrapolations of the OPA209 datasheet, a 15.0-Volt supply voltage (Vs) will yield a 123.7% increase in Maximum Output Voltage (Vpp) to the headphones, relative to an 8.4-Volt supply (as with a 9-V style, internal LiPo rechargeable battery).  So... you can more than double the output voltage to your headphones (and thus, the Watts rms) by using a 15-Volt supply instead of an 8.4-Volt supply, but....
 
I agree with Paul, here, completely.   Running with a higher Vs (supply voltage) to the op-amps increases the Watts rms to your IEMs or transducers - but this can't do nearly as much with efficient IEMS for audibly improving headroom-related sonic traits such as increasing dynamics, bass energy, or better control of the bass and mids, as it can with inefficient, full-size headphones.   You're just not likely to hear a difference between 15V and 8.4V (as with a rechargeable 9V internal battery) when using IEMs.  I certainly couldn't when using my Shure SE530 with the Stepdance.   

 

There is however, a very weak argument that could still be made for using 15V power with efficient IEMs:  Datasheets for the OPA209 (or the original Stepdance' OPA1611) show that THD + Noise are taken to their lowest possible levels with a supply voltage (Vs) of 15.  Go higher than 15Vs, up to the maximum permissible 18Vs, or lower than 15Vs, and according to the datasheets, these op-amps will suffer an increase in THD + Noise.  In terms of measurable performance, they are at their cleanest when supplied with 15V, but I seriously cannot detect any difference in this regard, even with the Shure SE530.  But, if you just want that warm and fuzzy feeling that comes with knowing you are driving the op-amps to deliver their absolute best possible performance, go for it.  Personally, I don't think it's worth the effort and inconvenience - not at all.   

 

Less efficient, full-size cans are a different story, entirely.  I don't think anyone can claim they hear a reduction in THD + Noise at 15V, but a BUNCH of us can testify that we hear wonderful improvements in dynamics, bass energy and control - right up into the lower mids, when using something like the LCD-2 with the Stepdance family of portable amps running on 15V power.  So clean, so neutral, so transparent - yet amazingly powerful, for such a tiny box.  My DACport LX > 15V Stepdance > LCD-2 rev.1 comes very close to offering just as much PrAT and authority as my DACmini CX (1-Ohm mod)  > LCD-2 rev.1, but I swear it's more neutral AND more transparent - it has none of the DACmini CX' very slight grain in the treble.  It's also inky black in the absence of a signal - more so than any other amp I have or have had.  The 15V Stepdance and its descendants can literally do double-duty as a desktop amp, for most purposes.  

 

Enjoy!

 

Mike

post #2192 of 2790
Wow! Thanks you so much for all the fast and super detailed info!! Really appreciate this!! zilch0md made very much sense to me that the gain of 15v is irrelevant to sensitive iems.
post #2193 of 2790

I'm using the Radioshack 15VDC 1000mA AC to DC Adapter with adaptaplug H and it is working perfectly with the QuickStep!  I don't notice a huge difference in sound using my FitEar F111 but the good news is that the noise floor hasn't increased either.  I like the fact it is a worldwide compatible adapter too.

 

Hopefully, I'll have an HD800 returned to me so that I can test whether it makes a difference on high impedance cans.

post #2194 of 2790

Hi utdeep,

 

Quote:
Originally Posted by utdeep View Post

I'm using the Radioshack 15VDC 1000mA AC to DC Adapter with adaptaplug H and it is working perfectly with the QuickStep!  I don't notice a huge difference in sound using my FitEar F111 but the good news is that the noise floor hasn't increased either.  I like the fact it is a worldwide compatible adapter too.

 

Hopefully, I'll have an HD800 returned to me so that I can test whether it makes a difference on high impedance cans.

 

That's great!  I've been hoping someone would take the plunge and try that Radio Shack adapter.  Thanks for the report!  

 

It's nice to know that it's quiet.  

 

Enjoy!

 

Mike

post #2195 of 2790
Thread Starter 
Quote:
Originally Posted by zilch0md View Post

I agree with Paul, here, completely.   

 

Always a good default position, Mike.  :~D>

 
Quote:
Originally Posted by zilch0md View Post

The 15V Stepdance and its descendants can literally do double-duty as a desktop amp, for most purposes.  

 

Quote:
Originally Posted by utdeep View Post

I'm using the Radioshack 15VDC 1000mA AC to DC Adapter with adaptaplug H and it is working perfectly with the QuickStep!  I don't notice a huge difference in sound using my FitEar F111 but the good news is that the noise floor hasn't increased either.  I like the fact it is a worldwide compatible adapter too.

 

Hopefully, I'll have an HD800 returned to me so that I can test whether it makes a difference on high impedance cans.

 

Interesting. I do in fact use the Stepdance often as a home amp albeit mostly with low impedance headphones. I have long been interested in a home power supply. (Currently I just swap out rechargeables.)

post #2196 of 2790
Quote:

Originally Posted by cooperpwc View Post
 

Quote:
Originally Posted by zilch0md View Post

I agree with Paul, here, completely.   

 

Always a good default position, Mike.  :~D>

 

 

beerchug.gif

post #2197 of 2790

Hi Guys,

 

By following the clear instructions /discussions of you (especially Mike) - Many thanks!

 

I set up my 15V 2stepdance system.

 

Now, I would like to ask your opinions / experiences : Can this system push AKG K701 well?

 

Many thanks!

 

Best regards,

 

Airwater.

post #2198 of 2790

 

Quote:

Originally Posted by airwater View Post

Hi Guys,

 

By following the clear instructions /discussions of you (especially Mike) - Many thanks!

 

I set up my 15V 2stepdance system.

 

Now, I would like to ask your opinions / experiences : Can this system push AKG K701 well?

 

Many thanks!

 

Best regards,

 

Airwater.

 

Hi Airwater!

 

I see this was your first post!   Welcome to Head-Fi!   And welcome to the 15V Stepdance club!  

 

beerchug.gif

 

I have the AKG K550 and find the 15V Stepdance does a very nice job with it, but I have no experience with the K701.  I'm pretty confident it will be fine.

 

Are you thinking of buying the K701?

 

What are you using as your source (as input to the 2Stepdance)?

 

Thanks,

 

Mike

post #2199 of 2790
Quote:
Originally Posted by zilch0md View Post

 

Hi Airwater!

 

I see this was your first post!   Welcome to Head-Fi!   And welcome to the 15V Stepdance club!    SORRY ABOUT YOUR WALLET!evil_smiley.gif

 

beerchug.gif

 

I have the AKG K550 and find the 15V Stepdance does a very nice job with it, but I have no experience with the K701.  I'm pretty confident it will be fine.

 

Are you thinking of buying the K701?

 

What are you using as your source (as input to the 2Stepdance)?

 

Thanks,

 

Mike

No need to thank me zilch0md. biggrin.gif

post #2200 of 2790

Hahaha!  I intentionally left that out!  biggrin.gif

 

But around here, to leave that out is almost a grammar error!   biggrin.gif

post #2201 of 2790
Quote:
Originally Posted by zilch0md View Post

Hahaha!  I intentionally left that out!  biggrin.gif

 

But around here, to leave that out is almost a grammar error!   biggrin.gif

*Head-fi community all nods in agreement/aproval

post #2202 of 2790
Quote:
Originally Posted by airwater View Post

I set up my 15V 2stepdance system.

 

Now, I would like to ask your opinions / experiences : Can this system push AKG K701 well?

 

The 2Stepdance is a great portable amplifier and I hope you will enjoy it. But let me be honest regarding the K701 - it needs a very powerful amplifier in order to play up to its full potential. So if you have the K701 already it will probably sound much better when the 2Quickstep is added to the chain - in that case - just enjoy it normal_smile%20.gif

 

If you are thinking of buying the K701 only to use with this portable amplifier I think you can find better options with better synergy.

post #2203 of 2790

Thank you all!

 

My current system is Sony M10 + 15V 2stepdance + ATH esw11ltd, and I am very satisfy with it. Now I am searching for my Christmas gift K701, but as
Ramushorn said, I am quite worry about my system can not play up the full potential of K701. The good news is I still have a long time to study and search (maybe for an alternative).

 

Enjoy the music, happier the life!

 

Thank you all again!

 

Airwater.

post #2204 of 2790

Hi Airwater,

 

Quoting Airwater's last post... (Click to show)

Quote:

Originally Posted by airwater View Post

Thank you all!

 

My current system is Sony M10 + 15V 2stepdance + ATH esw11ltd, and I am very satisfy with it. Now I am searching for my Christmas gift K701, but as
Ramushorn said, I am quite worry about my system can not play up the full potential of K701. The good news is I still have a long time to study and search (maybe for an alternative).

 

Enjoy the music, happier the life!

 

Thank you all again!

 

Airwater.

 

Wow!  You are a Sony PCM-M10 Recorder user, too!   beerchug.gif  

 

IMG_6542-tweaked-x768s.jpg

 

 

Anyone willing to suffer the PCM-M10 recorder's not-so-friendly-for-playback user interface has my respect. It takes some time to get used to it, but it's not so bad once you are familiar with it and the proprietary 96/24-capable sigma-delta DAC sounds pretty good through the line out.  I can only fault it for being a little bit bright (which is great for LCD-2) and having a very slight graininess that's not heard with better DACs.  

 

Have you programmed the 3.5mm jack for "Line Out" instead of "Headphone Out"?  (I'm just checking, in case you are unaware of how to bypass its unimpressive headphone amp.)

 

I don't know how you feel about wearing supra-aural headphones (that sit on top of your ears rather than surrounding your ears), but I can attest from many hours of listening that the very efficient Beyerdynamic DT1350 sounds GREAT with the Stepdance, even on an 8.4V rechargeable internal battery - all the better with 15V external power.  The bass is spectacularly well controlled, energetic, and deeply extended.  

 

For a few weeks, now, Amazon has been selling the DT1350 for only $199.00 - the lowest price they've ever sold it, according to camelcamelcamel.com.  I checked just now, and see that you have to add it to the cart to see the $199.00 price.

 

Going on Rasmushorn's advice, above, regarding the K701 (better than my speculation, as I had said I've never heard the K701), the Beyerdynamic DT1350 might be a better choice for use with the Stepdance, if you want a fairly neutral, clean, transparent sound, with terrific, well-controlled bass.  But again, you might prefer a circumaural design rather than a supra-aural design.  (Some people complain that the DT1350 hurts their ears after long listening periods.)

 

Don't jump on the DT1350 just because it's currently available at a good price - I encourage you to continue to seek opinions before acting.  The 2Stepdance deserves a good headphone!  

 

smile.gif

 

Mike

post #2205 of 2790
There is nothing wrong with pairing the AKG K701/702 with the Meier Stepdance, 2Stepdance or Quickstep. It plays loud enough, has a tight controlled, impulsove bass and very nice textured treble. As these amps do not alter the sound signature of the source, but only amplify in an awesome way, you cannot go wrong.
Had the DT-1350 for some time when it came out. I could hardly get a good seal with them. Then it is lacking the bass completely. And due to that I could never forget that I was wearing it, as I was permanently fighting with the fit on the ears.
Edited by pietcux - 5/30/13 at 9:57am
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