The E12DIY is a special project from Fiio and is a limited editing offering for audio enthusiasts and tinkerers. The DIY is designed to let enthusiasts tweak the amp by changing op amps more on that latercapacitors and resistors, but it begins life as a very capable portable amp even if you do nothing to modify it. Because of the modifiable nature of the DIY, the specs provided other than dimensions are indicative and by no means fixed:.
Sure, there are tiny offerings out there like the Shozy Magic and Ray Samuels Mustang, but the majority of amps are similar in overall size and weight. Both colours differentiate the DIY from the standard E12 models which are black. The E12DIY is nice and simple — 3. Unlike the standard E12 model, there is no bass boost switch or crossfeed circuit. According to comments I read somewhere from Fiio, the E12DIY was deliberately kept simple to allow more space for the best simplest?
Fiio struck a perfect balance with the design of the E12DIY by making it low-powered enough to drive sensitive OEMs, while also providing a high gain mode and plenty of power to drive much more challenging headphones.
This means you can focus your amp to drive your exact headphone if you have a higher impedance model or you can keep it more versatile with the other buffer options. I did notice that using the BUF buffer introduced a potential for some noise to be picked up when I moved the interconnect and earphone plugs around inside the sockets i.
Back to discussing noise levels, the most noticeable benefit of a black background is that it allows every nuance, detail and texture of your music to be heard easily and clearly, but without having to over-emphasise anything. The E12DIY is able to deliver incredible clarity and detail while never sounding like it colours or enhances anything.
Some years back I worked in car audio, designing and installing stereo systems. My focus was always sound quality and imaging, not necessarily sound pressure levels i. One of the tricks I often employed to create epic sound quality without spending too much money was to have separate amplifiers for each channel. The reason I told that little story is because some amps do a better job than others at replicating this type of isolation of the 2 stereo channels.
You can always tell when an amp does it well because the auditory image is always deep, beautifully defined, and engaging. The E12DIY does this extremely well! There are no crosstalk measurement published, but to my ears, the stereo channels are beautifully isolated and this is particularly true when using the OPA op amps 2 mono op amps being used much like my 2 separate car amp analogy above.
In my understanding, an op amp processes the incoming signal a bit like a pre-amp.
The buffer then provides the gain or voltage to drive the signal into the headphones. As I said, I am still learning this area of audio and electronics, but I think of the op amp as a pre-amp of sorts and the buffer as the interface between the amplifier and headphones — the engine that drives the headphones according to the directions provided by the op amp.
If you know more about this topic and can clarify or correct my explanation, please feel free to share your knowledge with me and others via the comments section. The silver tin that comes with an E12DIY contains a selection of 4 op amps and 3 buffers. I will hopefully be able to dedicate a whole post to the different sounds and flavours of various op amps in the near future, but my personal preference from these op amps is the OPA which balances near-neutrality with a touch of bass warmth and lots of detail and clarity.
Until I can write in more detail about these op amps, there is some great discussion of different op amps scattered throughout the E12DIY thread over on Head-Fi.
The BUF might have a slight edge in the texture and weight of midrange, but I find myself preferring the LME and the consensus by a small majority on Head-Fi points towards the LME being the preferred buffer.There have been several threads here talking about the National LME I suspect most got their itch well scratched with the above project, but I wanted to at least ask.
For those not familiar with it, the LME is an ultra low distortion output buffer that National pairs with one of several of their ultra low distortion audio op amps for a complete servo controlled headphone amp. It would be significantly less expensive than the OPC "Wire" version as instead of 6 expensive op amps you only need 2 dual op amps there's no issue sharing the servo with the gain stage for each channel in a single package as National did in their reference design.
And the dual parts are barely more expensive than the single versions. I also plan to use through hole parts for everything but the LME and it's fairly big and relatively easy to solder.
The dual op amps used in the National design are available in an 8 pin DIP and could even be socketed for those who like to experiment with different op amps. Part of my interest in the LME is to serve as the "ultra low distortion" entry in a comparison between genres of headphone amps.
I hope to conduct measurements, blind ABX listening, and audio differencing on the National LME reference design, a popular lower feedback discrete Class-A design i. If there's enough other interest it will change how much effort I put it into the PCB and documentation as well as my purchase quantity for the PCBs. Find More Posts by RocketScientist.
If you want to do a budget version then why not use the BufP as that's about half the price of the identical? Otherwise, my own findings using my ears, are that the plastic chips are grossly inferior to the TO99 version of the which is very inferior to two single TO99 HA.
I'm in! I would also likely be interested in a group buy if one occurs. I've been messing around with the LME for several months, including that headamp circuit in the data sheet. I did see that National ap note on the eval board, which contains the details of the parts specifications.
Unfortunately I saw the "wire" amp thread too late to order, but opc put together a fine amp there. My uses are mainly for unbalanced input through. My random thoughts on some of the comments and discussion so far in the "wire" thread about this I've read several postings of BUF vs.
Sounds good, but I think the LME sounds better, just imho. See my post in the "wire" thread about paralleling two LMEs per channel.
Does anyone here know anything about PCB design?
I've read at least one posting where that was tried and subjectively sounded better. The BUF apparently has 10R on the emitter of each output transistor. The LME shows a similar resistor but I've yet to read a value. Paralleling may get that impedance down looking into the output port. At least having the option for the second chip per channel would be nice. Would be interesting to hear it with servo and with a really good layout. Some thing to experiment with I have read those posts before by the ex National guy saying the metal can versions sounded better.
I think he wrote that he was about to look into it when the staffing "bomb" went off there at National. From that little bit of info in the post I would agree that it may be good to socket the LME so that a metal can version could be stuffed in. Pricey, but hey still in the ballpark if they make better sound, and it would be optional anyway.February 29, February 27, February 3, February 2, November 5, March 26, January 8, February 12, February 5, November 24, November 19, February 18, February 6, January 25, January 16, January 15, February 4, February 1, January 26, January 1, October 18, August 19, May 11, January 28, October 29, February 21, March 27, January 12, September 6, August 6, January 7, Menu Menu.
Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced….
High Gain Versus Low Gain Settings on Headphone Amplifiers
Previous Next. Aug 11, 10, 0 0. Does anyone here have any advice? I'm trying to keep the board size down to 2" x 2" for reasons of cost.
PottedMeat Lifer. Apr 17, 12, Skimming your design, I see you've replaced some SMT devices with thru-hole and eliminated the big battery spaces.Forums New posts Search forums. New posts New posts New profile posts Latest activity. Members Current visitors New profile posts Search profile posts. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums.
Conventional wisdom says that the high gain setting on an amplifier adds noise as "there is no free lunch.
The Schiit Magni 3 took a 3 dB hit to performance when comparing the low gain setting to the high gain setting. It seems that low gain is superior! The test matrix here is infinite in scope. What volume does one choose for each gain to test?
After pondering for a second or two, I decided to go the defensible route of setting low gain to max and then matching the same in high gain. Both of these amplifiers have analog volume controls and in high gain, they can be touchy as far as getting accurate levels out of them but I managed to get close enough. For these tests, I chose to use ohm test load as that is in my analyzer and hence, higher fidelity than my external dummy load.Best Pick. Check Price. General Specifications.
About the Product. The NX5 is a high performance headphone amplifier which has Gain set and Selectable Mega bass, it has been designed for all kinds of music player to improve the player's output power and sound quality to drive a headphone.Fuente de voltaje con kicad parte4)
The new FiiO A5 achieves nearly the same powerful output of the original E12 Mont Blanc unit but with improved channel balance and a lower noise floor that's ideal for driving highly sensitive in-ear headphones on the 'Low Gain' setting.
Built-in DAC. Fiio A5. What customers say about "Key Specs". Height Width Depth Weight. Enclosure Material. Frequency Response. OS Compatibility. Android, Microsoft Windows, Linux. Wireless Connection. Frequency Response Max. What customers say about "Features". Manufacturer Warranty. Fiio E6 Portable Headphone Amplifier.
Audioengine B1 Bluetooth Music Receiver with 5. Fiio E9 Desktop Headphone Amplifier. AudioQuest DragonFly Black v1. Best DACs. Best Marine Speakers.
Fiio E12DIY Portable Amplifier
Best True Wireless Earbuds. Best Boomboxes. Best Turntables: Ultramodern and High Class. Best Stereo Receivers. Best Emergency Radios. Best Studio Monitors. Best Noise-Canceling Headphones. Best Marine Stereos. Best DJ Speakers.I like discrete buffer,because I am a diyer. I want to do most stuffs by myself. Old thread, I know but LME has come. Fancy meeting you here in our humble forum. Thanks for the tip. Any comments regarding the sonics of this buffer?
What's more, the discrete "monofied" Jung diamond buffer uses very common transistors and diodes that you can easily source in SLT within 5 minutes. If you google for "sijosae monofied diamond buffer", you should be able to find a link to a headwize or headfi thread that has the layout and schematic.
The layout is supposed to be pin-compatible with the BUF, so it makes it very easy to implement into any circuit that requires such a buffer. What do you think of my new diamond buffer? It looks nice and works good Parts are on both sides as you can see and the board has four layers. The boards are rather small also, compare with my finger.
You can post now and register later. If you have an account, sign in now to post with your account. Paste as plain text instead.
Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. Reply to this topic Start new topic.
Recommended Posts. Report post.
Posted June 27, Share this post Link to post Share on other sites. Posted June 28, Posted June 29, Guest peranders. Posted May 13, Posted May 14, Hi Peranders, Fancy meeting you here in our humble forum.
Posted May 14, edited. Edited May 14, by peranders. Guest Ph33lix. Posted March 19, Posted March 19, edited. Edited March 19, by peranders. Posted June 2, edited. Edited June 2, by peranders.