About OPPO, domestic users first reaction will be mobile, OPPO Blu-ray machines, of course it’s not fuel-efficient lights. OPPO product ever that we introduce today is not quite the same, is OPPO’s first plane diaphragm headphones (enthusiasts often called flat headphones) PM-1 and its ancillary machine HA-1. Though this is the first to enter the field of high-end headphones, but PM-1 has won the EISA with its excellent sound quality 2014-2015 HIFI award, about the actual experience?
Objective
Bring plane diaphragm headphones, enthusiasts are familiar with United States Audeze LCD series, the HIFIMAN HE series and “local level” of the United States such as ABYSS. And PM-1 also used the plane diaphragm technology, and lots of unique technology to improve the sound quality and adaptability. Flat diaphragm is hardly new in the early 70 ‘s it has emerged. Relative to the moving-coil headphone, it has its own advantages and characteristics of plane diaphragm headphones with retractable speed faster voice, more dynamic and better detail.
After the OPPO after years of research and development, called “spiral Turbo” technology makes better miniaturized plane diaphragm technology and ease of pushing. PM-1, OPPO uses a “dual ring-type high magnetic energy FEM optimized magnetic field design, double helical voice coil, unique 7 layer diaphragm” consisting of unique technologies, such as spiral Turbo plane diaphragm technology
Appearance and fact sheets
OPPO has almost PM-1 can be called luxury packaging, a large cardboard box is equipped with a mirror-like paint wooden box
Interior is grey suede with wooden box, wooden box snap and switching shaft detail can feel companies should be of the style. As far as the level of luxury packaging, OPPO is uncontested, relative to the million price is for the headphones have an overwhelming advantage.
Headset itself works quite well also, process standards are high, delicate, exquisite workmanship, gives a very pleasant feeling. All headphones with black leather and metallic silver with blend of retro, science and technology. Headphone bare metal is 395 grams, has certain advantages relative to other Tablet headphones, Audeze LCD series at prohibitive 600 grams.
PM-1 the whole skeleton made of aluminum alloy material, can to some extent promote durability.
Head beam connections riveting I did quite well, reversing the handle and smooth
Headset is surrounded by a ring of sand blasting process metal skeleton
Head beam cortex after part of a metal part by glossy design, stained fingerprints more easily, more easily scratched. PM-1 you can also adjust the headset size
Headphones ear muffs and head beams are made of soft Sheepskin material, feel and sense of wearing comfort
PM-1 features an open design
Ear muffs can be removed
Close-up of a plane diaphragm element
Velour ear muffs and randomly comes with the key 3.5mm single port copper cables
Randomly attached to a 6.35mm single crystal oxygen-free copper cord, styling than the 3.5mm interface to “big”, and 4-pin XLR balanced you need matching
Headphones are connected using the secondary 2.5mm
Package comes with a denim zipper storage bag
Add storage bag headset unit reverse the
Finally, we look at the PM-1 parameter:
Impedance: 32 ω @ 1KHz
Sensitivity: 102dB/1mW
Wire: 3M OCC line (single crystal copper, 6.35mm) line 1M OFC (oxygen-free copper, 3.5mm)
Unit type: plane diaphragm
Dimensions: 85 x 69 mm
Frequency response range: 10-50,000 Hz
Price: 8799
Judging from the parameters, OPPO through its own research and development unit, 32 ohms, sensitivity of 102dB easy, flat headset is very rare, it is also the most sensitive flat-panel headphones. From the actual trial, PM-1 it easier to promote.
After reading PM-1, and we’ll see from OPPO, decode, preamp, amp machine HA-1, which appears as a PM-1 partner, who also has a lot of bright. First of all, HA-1 is a machine that uses high-performance DAC–ESS9018, coupled with a class a amplifier circuit, a bespoke HIFI ring cow transformer and internal balance of elements such as lines, material to be used in good faith. In terms of appearance, HA-1 as well as sleeve brushed aluminum body makes it look more textured.
Front has a 4.3-inch color TFT display, it will display the parameters of the HA-1, and can provide the spectrum table, electric meter display. HA-1 has a power switch, input select knob on the left side, 6.35mm headphones output connector 4pin balanced output headphone jack,
Is the volume knob on the right side, supports -80dB to 6dB of volume adjustment. There is a standard USB interface can be linked under iOS devices. HA-1 is equipped with a remote control, remote control to control the volume when the volume knob will follow the rotation. After adjusting gain and volume will be automatically reduced to a suitable level, this design is very user friendly.
In order to help the body heat, HA-1 at the top and the bottom is equipped with ventilation holes
Behind HA-1 are lots of output, input and output interfaces, input interfaces including USB, coaxial, AES, optical fiber, and outputs include balanced XLR and RCA preamp outputs preamp output, especially for users who have both speakers and headphones. Of course, HA-1 can also be used as a DAC or a separate amp, very feature-rich.
HA-1 is equipped with a metal remote control, support some basic Player control. The circular button at the bottom you can adjust the input source.
HA-1 Bluetooth support as a sound source, you can also use the mobile phone for Bluetooth remote control, HA-1 Control App installed, you can use the mobile phone remote control HA-1, mobile phone remote control function is exactly the same as the remote control of an entity.
HA-1 basic parameters:
Size: 254*80*333mm
Weight: 5.9kg
Power: 70W, stand 0.5W
Recommend the headphone impedance: 32 ω ~600 ω
Price: 9799
Vocal performance
From the aspect of design, workmanship and materials used, set PM-1 and HA-1 are impressive, they together what about the sound?
Test environment:
Listen: PM-1+HA-1
Reference material: obur Don Cuzzio Don Juan and the Audeze LCD-3, AKG Q701 and Mini-Audio DX100, Aune M1
Audio input: PC USB input, install ASIO driver
Audition track types: dominated by pop vocals, ACG, accompanied by musical instruments, film soundtrack, and so on.
Listen to audio formats: FLAC, and WAV, and a small amount of DSD audio (ES9018 DSD in fact still be decoded PCM) iPhone 5 cases Ted Baker
PM-1 and HA-1 after more than 100 hours of burning, both should go into the State.
From the sound style, PM-1 is a balanced and smooth headset, is a more natural sound. Flat diaphragm headphones sound easy to achieve a sense of relaxed, this is their advantage relative to the moving-coil headphone, and the PM-1 is to promote the advantages of good. But to be on the loose, PM-1 and some high-end flat headset is still a little gap. For fine detail and sound from sound, PM-1 has done a very good resolution worth noting. In the HA-1, together with the PM-1 master record is relatively thick, energy of each band has a good showing. PM-1 is a more obvious dye sound headphones, but long time did not feel fatigued, style does not wield a sword and medals.
High frequency: high frequency of the combination of PM-1 and HA-1, smooth and natural, high frequency extended excellent, superior quality. PM-1 in HA-1 not take a clear, high resolution line, driven by, but the detail is still well preserved.
MF: this sound neutral, if the thickness is not thick, can claim to be right, the advantage of voice lines in great detail. Voices from a moderate, male and female that felt comfortable. But for the users who like vocals very ear, PM-1 this sense of MF may feel surrounded by strong enough.
Low frequency: high frequency performance relative to the PM-1 frequency is slightly weak link, the intensity of low frequency and dynamic feel strong enough. Of course, the spirited low frequency and not every user like PM-1 type of low frequencies, though not more fierce, but details and operating speeds are good.
Judging from PM-1 ‘s voice, can be said to be beyond what we expected, after all, this is first step in HiFi OPPO headphone market. From the sound quality, triple-frequency balance and breadth of sound fields, PM-1 and HA-1 pairs of cases there are many bright spots.
Collocation and other
Although we hear protagonist is PM-1 the headphones, but as the private partner, it will be one of the characteristics of HA-1. From the function, HA-1 is quite rich, as opposed to General machine products, Bluetooth and more mobile devices (iOS-only device) USB input, and also comes with a remote control, OPPO Blu-ray machines to do the HA-1, features much enough to allow competitors to shame. HA-1 also showing powerful thrust, in the case of high gain, can push more open LCD-3 around -25dB, coupled with the performance of all kinds of flat headphones believes there will be a surprise.
HA-1 LCD-3 (four pin balanced line) audition.
Via Bluetooth (aptX) connection and iOS device USB input can be maximum support 48kHz 16bit files, but for the other connection methods, both inputs are low frequency, sound isolation, not high, so users recommended for sound quality or select other audio input.
We also try to use the Walkman’s coaxial output connector HA-1, works equally well, of course, in general we are less used to this method.
As for the headphones mix, PM-1 parameter and is actually is a relatively “quiet” headphones. Even in Walkman phone even has enough sound pressure, but wants to play out its strengths and the quality was suggested with the desktop player, might even consider to buy some ears of ample thrust. For HA-1 set of matching, multiple input and output interface so that it has a very rich set of features, if you want to “walk the world” users, HA-1 is a good choice, and directly in front of as-level connectivity speakers, direct push headset has a pleasing effect. In addition, relatively speaking it’s decoding and USB interface are doing well enough, if you upgrade you might consider adding a balance on the basis of this amp to form a fully balanced headphone system, that would allow sound to the next level.
Summary
From product quality, sound quality and comfortable sense of listening to these points in General, PM-1 are worthy of its low price. Love the relaxed, balanced style of headset users can rest assured of purchase, in the mix can be selectively neutral or relatively strong low frequency front end use. Combination of PM-1 and HA-1, we gave high praise from sound style, thrust, HA-1 PM-1 well together. First to enter the market for high-end headphones have such standards, and believe that OPPO personal audio products will be recognized by more and more users.
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Letv superphone 1S, it uses all-metal fuselage integration, evolutionary version ID no borders suspended glass, narrow borders are closed the screen, thickness reduced to 7.5mm, weight 169 g. The three touch-sensitive buttons below the screen to a hidden design, in the case of back light not lit can do similar hidden effects. Fingerprint identification button into the mirror on the back of a fingerprint.
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