Jackson 6
100+ Head-Fier
- Joined
- Oct 22, 2013
- Posts
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- 36
The answer is yes Eddy. It only takes a couple of months for the cloning scuzzbuckets to go a cloning.
guys sorry to repeat an earlier post. any ideas if my sennheiser HD 25-II would be a good pairing with the a17? i think the 25's are 70 Ω. i also have shure srh840 which are 44 Ω. which would be the better pairing?
this link may be useful for you : http://www.digizoid.com/headphones-power.html
The problem with that calculator is that it tells us how loud a headphone can be with various amounts of power (mW) coming in, but that doesn't mean the headphone will achieve its maximum sonic quality at those power ratings.
For example, the Audeze LCD-2 has 70-Ohm impedance with an efficiency of 93 dB / 1 mW. The digizoid page calculates the following results for those variables:
http://www.digizoid.com/power.php
I don't doubt that this information is accurate, but if 500.66 mW into the LCD-2 is "Painful" and even 158.41 mW is "Very Loud," why does Audeze recommend a minimum of 1000 mW to drive their headphones?
Answer: We shouldn't be concerned only with how loudly we can play the music with a given amp's rms output - we should also be concerned with how much headroom we will have for dynamics and how much control can be exerted on the movement of the transducer - especially in the bass region, where the mass of moving parts must be accelerated and decelerated at lower frequencies and tend to get sloppy in the absence of sufficient power.
I can plug my LCD-2 into an iPhone and find it to be plenty "loud." But the bass and even the mids are muddy.
The LCD-2 sounds a lot better plugged into my OPPO HA-1, which can pump out nearly 10,000 times as much power as this chart's calculated 0.17 mW - which I don't doubt is all that's needed for an 85 db SPL "Safe" listening level - and my SPL meter reveals that I routinely listen at about 79 or 80 dB, so I'm not even using 0.17 mW rms from my OPPO HA-1, despite the fact that it can deliver about 1700 mW into 70-Ohms.
So, how much power you "need" to achieve a given SPL level is one thing, but how much power you "want" to take control of the moving parts, bringing them into total submission, is another.
I do like the way the digizoid calculator breaks out the voltage needed and the current needed for a given SPL level, based on headphone impedance, but for the sake of sufficient headroom, I'm a lot more comfortable with multiplying all of their resuts by a factor of 10, at least! And not to sound arrogant, because there are people out there who have a lot more experience than I do, but I'm recommending a 10x multiplier from empirical observations - listening to many different headphones on many different amps, knowing the power ratings of those amps. These digizoid calculated values simply will not translate to "high fidelity" even when you keep your SPL levels at 80 dB.
Mike
Are there already fakes for sale? This seems too good to be true or not?
http://www.ebay.nl/itm/SONY-NWZ-A17-A-Series-MP3-Walkman-Black-Bluetooth-Ver-2-1-EDR1-A2DP-AVRCP-OPP-/251789701245?pt=LH_DefaultDomain_0&hash=item3a9fd5f07d
is a good idea to have it on, also a good idea not to let your battery run down to 0%
I am doing this of batterycare off to charge at least three times the battery during first use to condition it for maximum potential
question @spatzi
where you fiddling constantly with the screen, f.e looking for song info or palying arround with efefcts?
Not really. Set it to clear bass only, and then used the screen as little as possible, playing full albums. BTW, thanks so much for not whipping me with "Guess you still didn't read the manual." before answering. Turns out, we don't really need the forum. It's all in the manual!
@castleofargh
I find your analysis, above, to be very reasonable, until we get back to Audeze' recommendation of a 1000mW minimum rms output. My CEntrance DACmini almost, but not quite, brings out the best possible performance in my LCD-2, at around 500mW. The OPPO HA-1 finishes the job completely with 1700 mW. A lot of highly respected Head-Fi Members have touted the benefits of running the Audeze headphones on amps that approach their maximum rated handling of 13,000 mW (13 Watts) with amps like those by Leben. And there are members using speaker amps like the Odyssey Audio Cyclops, rated at 110 Watts into 8-Ohms, which equates to 12.6 Watts into 70-Ohms, to driver the LCD-3.
Perhaps you hit the nail on the head by mentioning the need for current, as opposed to the need for voltage, such that the overall power is excessive - more voltage than is needed, just to get the current that is needed, but in any case, my recommendation for multiplying the digizoid numbers by a factor of 10, at least, was conservative in my mind.
Doing a poor job of staying on topic, here, I'm with you completely in regards to the A17's 10mW max. specification evidencing that "it doesn't have enough power," except for the most efficient of IEMs and headphones, perhaps.
Thanks,
Mike
Could have been written by me. Also does x5 comparison which highlights the same problems I had with it.
https://gigaom.com/2015/01/13/its-2015-and-i-just-bought-a-sony-walkman-a17/