Mapletree ear hd amplifiers

You might want to keep reading. Very few have credible performance measurements, nearly all the portable models lack enough output for many full size headphones, the Cmoy designs are deeply flawed, many have too high of an output impedance, and the amps that get it right are generally seriously expensive. And, for maximum versatility, what if worked at home on AC power or on-the-go from rechargeable batteries? And, even in my virtual lab coat with virtual pocket protector, I agree. There are massive differences in the sound of different headphones. Much like a vintner leaves their personal signature on the wines they produce, so do headphone designers.

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Mapletree ear hd amplifiers

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Content:

• Mapletree Audio OD300 Amp
• MAD EAR + Purist HD Headphone Amp
• Mapletree Ear+ HD250 SE Tube Headphone Amplifier; HD-250 Special Edition
• The Mapletree Audio: SugarMaple OD300 Headphone Amplifier – One Smooth Player
• Mapletree Phono 3E User Manual
• Tube Amp for Grado Headphones
• Mapletree Audio Design Ear+HD Headphone Amplifier HD50 #2
• audio-talk

WATCH RELATED VIDEO: Magic Eye in a Mapletree Ear + Purist HD

Mapletree Audio OD300 Amp

You might want to keep reading. Very few have credible performance measurements, nearly all the portable models lack enough output for many full size headphones, the Cmoy designs are deeply flawed, many have too high of an output impedance, and the amps that get it right are generally seriously expensive.

And, for maximum versatility, what if worked at home on AC power or on-the-go from rechargeable batteries? And, even in my virtual lab coat with virtual pocket protector, I agree. There are massive differences in the sound of different headphones. Much like a vintner leaves their personal signature on the wines they produce, so do headphone designers.

They all measure significantly differently. And they all balance the various trade-offs differently. But in a headphone amp , you can get close enough to perfection to where the differences that remain have been demonstrated as entirely inaudible.

The O2 is just such an amplifier. The DAC1 is something of a favorite in the audiophile headphone community. A lot of subjective critics, and those who have measured it, really love it. Collectively they cover a wide range of impedance curves, efficiencies, types and subjective tastes in sound. The Denons and Etys are ruthlessly revealing, the HDs are incredibly musical, the SuperFis ultra efficient, and the Beyers show off performance in the deepest bass. I hope to conduct more listening comparisons involving the O2 and perhaps even a public challenge or two.

Perhaps an O2 listening challenge is in your future? Those who spent more on their cables than the total cost of the O2 may feel compelled to dislike it.

And, in the usual biased listening, their brain will likely deceive them into hearing just what they expect to hear. The O2 is intended for those open to a more objective approach.

What their car looks like, or the name badge on the front, can be more important than how it drives. There are plenty of car, and audio manufactures, catering to such tastes. The O2, in basic form, is very big on performance but not so much on bling. DIYers, however, are free to make the O2 look as impressive as they like. They can have their high-bling cake and still feast on tasty performance. But O 2 also represents oxygen, and in some ways, this amp is a breath of fresh air.

It has none of the limitations listed above. It simply does a very credible job of disappearing from the signal chain leaving just the music as the recording engineering intended. As they say on Top Gear: How hard can it be? I established a few worst case hard-to-drive headphones and worked backwards from there see O2 Design Process. The result is the O2 should comfortably drive most any non-electrostatic headphone your average audiophile would want to use.

The O2 has 2 gain settings to help match it to different sources and headphones. The O2 is a fairly minimalist amp designed around the solid objective goals listed above, not subjective hype or audiophile myths see: Subjective vs Objective. And some of that is no doubt personal bias creeping in. But, truth be told, I do have a point to prove. But the O2 is different. Can anyone show me a portable headphone amp that overall objectively performs better for even triple the finished assembled price of the O2?

May the best amp win! The challenger can pick the other amp, source, music, and headphones. The results, win or lose, will be published on this blog. The primary goal of this blog is to get more objective information out there to help those interested better decide how to spend their money on gear.

So if that sort of testing is being done, why do so few manufactures publish any credible test results? Neither is very encouraging. Design Highlights. Many find their way onto tracks on the weekend yet serve as a comfortable car for the weekday commute.

The current MX-5 is a lot like the original model. There are no tricky surface mount parts so no special tools or skills are required. To keep shipping costs much lower, and make things easier, all the components except the PCB and enclosure are available from Mouser Electronics in a single order.

Most of the parts are very common and nearly all have Mouser substitutes if something is out of stock. There are also part numbers from worldwide distributors like Farnell. The board slips into an inexpensive all aluminum enclosure with no mounting hardware required.

All the connectors and openings are along one side and require only round holes in standard drill sizes—no tricky machining required. And, to avoid any metal work completely, just send the supplied file to Front Panel Express for an inexpensive ready made front panel.

The easiest, and most pure, way to a real ground in a portable headphone amp is to use two batteries. It makes the amp a bit bigger, but the single battery options are generally much less attractive and the reviews on this website back that up. Under those conditions the amp could destroy your headphones with DC. The O2 uses, as far as I know, a novel approach to solving this problem.

It shuts the entire amplifier down when either or both batteries start to get low or if one battery becomes disconnected. This not only prevents harmful DC at the output, it also helps protect the rechargeable batteries from being damaged by cell reversal.

You can safely listen until it shuts itself off. This allows more optimal use with different sources and headphones of widely different sensitivities. So you can use your IEMs on the go and your power hungry big cans at home with a flick of a switch.

The default configuration of the O2 is to be as small as possible. This means 3. See: Enclosure Options. For now the O2 is a DIY project. But see the O2 Details Resources for various options, including fully assembled versions, to get one. The O2 can provide that magic.

There are no ads, sponsors, hidden agendas, or online stores. It barely gets warm on AC power and not at all on battery. Any noise you hear with the O2 will be from the source or an open circuit cable connected to the input. That makes those designs sensitive to even small amounts of noise or variations on their power supply.

Try that on a single-ended zero feedback and you might damage your headphones the transient at the output will be so large. See The Subjectivist Pitch above. I also believe those currently listening to amps with significant problems, be it higher output impedance, high distortion, audible noise, insufficient power, etc, might be smiling if they try an O2.

BATTERY LIFE: The normal version tested here will run 7 - 9 hours and the low power version will roughly match or beat most portable players at 20 - 30 hours depending on the headphones, music, and volume. See: Low Power Version. For those seeking maximum performance for their dollar, the Objective 2 is worth considering.

And the Creative Commons license opens up commercial possibilities for other people not me to profit from it. And if someone accepts my earlier challenge, and does come up with a better amp for the money, then everyone wins. My entire goal was to raise the bar and show what can be done with solid engineering, proper implementation, and cost-optimized components. I have written a follow up article that addresses the design process while O2 Details covers everything else including links to several other O2 resources and the design documents schematic, BOM, board layout, etc.

As always, comments and feedback are encouraged. The official threads for this amp are:. Measurements aka Tech Section. All the comparative data makes this section longer than normal but hopefully more interesting and useful. Both channels are shown into ohms.

The —3 dB point is just above DC at 1. This is excellent performance and well under my 2 ohm rule of thumb. The chip manufactures make a big deal about it and audiophiles, not surprisingly, have jumped on the bandwagon. The larger the resistor value, the more noise you get.

Many DIY headphone amp designs have the volume control at the input to the gain stage. By comparison the O2 has ohms in series with the input. The way volume controls work, the noise is typically worst at half volume where you have ohms in series with the source and ohms to ground. If you put the volume control after the gain stage its Johnson Noise is no longer amplified.

And, as a bonus, the volume control at lower settings now attenuates noise from the gain stage. To convert from mV to dBV just add 8 dB. The dScope reads in dBV directly. It also makes it easier to compare my data to the data published by others. And note this is at full volume which is the worst case scenario for the O2.

MAD EAR + Purist HD Headphone Amp

View Full Version : Transporter to headphone amp options. What is your opinion? I'd like to keep the signal path minimal and not add anything that goes between the TP analog out and my small tube amp. If so, what amp would you suggest?

Mapletree Ear+ HD250 SE Tube Headphone Amplifier; HD-250 Special Edition

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The Mapletree Audio: SugarMaple OD300 Headphone Amplifier – One Smooth Player

Then about 12 years ago I became a father for the first time and I quickly realized that my speaker listening would be severely limited; thus my foray into headphones began. So being a long-time tube fan, I searched for a well-priced and strong performing headphone tube amplifier. Lloyd Peppard, Ph. These amplifiers are designed by Dr. When given the opportunity to review the new all-octal tube amplifier, I jumped!

Mapletree Phono 3E User Manual

Read times. Pages: [ 1 ] Go Down. Member Posts: This is my all time favorite amp and one I had planned on never selling - that's how much I enjoyed it. I kept trying to beat it and have had a looong series of much more expensive amps but I always kept this one and with the exception of 2 very much more expensive amps , not were immediately and significantly better to me. But sense I have always had other amps, this amp has seen very little use - it hasn't even been plugged in or had anything connected to it for the last couple years.

Tube Amp for Grado Headphones

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Mapletree Audio Design Ear+HD Headphone Amplifier HD50 #2

Discussion in ' Audio Hardware ' started by mtruslow , Mar 7, Log in or Sign up. Steve Hoffman Music Forums. Can anyone recommend to me a great tube headphone amp..

audio-talk

Digital out is only for digital in as in a DAC. If you had a 3. I bought one of those before I had a DAC. I bought a D30 for the wide selection of inputs.

Tubes Asylum Questions about tubes and gear that glows. Atma-Sphere Music Systems, Inc. I also have the Ear Head MAD man Dr. Lloyd Peppard has a nice line of modestly priced products including the original Ear headphone amplifier, a phono stage, several preamps, and more to come. Most of these are available in both kit and assembled versions.

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