Strong headphone amplifier circuit
DAC, other configurations are also very particular about, Op-amp uses Burr-Brown's OPA2134, many professional audio are used; while areas in order to strengthen headphone output, especially to join TI's TPA6120A2 (on Fostex HP-P1 and a lot of DIY ear expansion is also used), coupled with 300Ohms headphones have 39mW output, while 32Ohms be more 227mW output, enough to push a lot of headphones, while the body also has High / Low Gain setting. Line design also took some thought, to use Isolated Ground designed to prevent digital and analogue interfere with each other in the process. Body made of stainless steel and aluminum, feel quite solid, the volume is the same level than a lot of "national brick" fine, but still feel good, and the metal body have a good heat dissipation. ARM1 for the built-in battery, the use of USB charging, playback time is about 5 hours (Low Gain), in High Gain even shorter, just enough on the 1st use. Operation, use the basic push-button operation, plus two Arrows central Enter key, the traditional users is very easy to operate, coupled with the volume key knob is also very pleasing.

ที่มา:http://www.dhifi.com/106/110/122/123/2013/0407/213213_2.html#

Play Test
Listen LP: Hacken Lee "in the forest and wilderness," Ivana "Atmosphere", VA "Re-Machined: A Tribute to Deep Purple's Machine Head"
Headphones: Ultrasone Edition 8 Limited, Audio Technica ATH-ESW11LTD, Sennheiser IE8, Etymotic ER4S
Format: WAV, FLAC

Using TPA6120A2 of ARM1, output volume than the same player a lot higher, thus promoting Edition 8 LTD, ER4S other headphones no difficulty, and background noise control is quite good, coupled with low-impedance headphones also quite quiet. Listen Hacken Lee "Diamond Life", full sound, voice sketched quite delicate, among the cadence can be displayed, perceived singing, breathing conversion, while the piano and the guitar also has a certain sense of permeability. Trial Ivana "Queen restaurant," vocal expression is still very pleasing, with the ATH-ESW11LTD play Ivana gentle voice, high-frequency rich extensibility, low elasticity and lower the potential skills, musical instruments are sleek and bright and distinct layering, so the atmosphere of the song is more prominent. Finally, Steve Vai version of "Highway Star", by the Edition8 LTD demonstration Guitar excitement, spicy songs, ruthless, Jinduren amplified sound very fast response, bringing a sense of speed in the extreme. ARM in all respects have good performance, like the full, enthusiastic users are suitable.

ที่มา:
http://www.dhifi.com/106/110/122/123/2013/0407/213213_2.html#

Summary
ARM1 similar player to get rid of the bulky size and weight, and has a superlative headphone output (also Line-out choice), at the cost of only 5 hours of life. While playing at this stage already has a very impressive performance 16bit/44.1kHz expect there will be after the new firmware upgrade to 24bit/96kHz or higher specification, release their potential.

Specification
● DAC Chip: Burr-Brown PCM1794A
● Built-in storage: 32GB
● Compatible music formats: mp3, wma, ogg, APE, FLAC, wav
● corresponding bit / sampling rate: 16bit, 44.1kHz - 48kHz
● Output terminal: 3.5mm headphone, 3.5mm Line-out
● Frequency response: 10Hz - 20kHz (+ / - 0.02dB)
● Output power: 227mW @ 32Ohms, 39mW @ 300Ohms
● Total harmonic distortion: 0.01% (Line-out)
● Signal to noise ratio: 98dB (Line-out)
● Connection Interface: USB
● Power supply: Built-in battery
● Play time: about 5 hours (16bit/44.1kHz wav)
● Screen: 2.4 inch LCD
● Dimension: 57 x 113 x15 mm
● Weight: 156g (with battery)
● Accessories: charger, USB cable
● Price: $ 5,880 HK

ที่มา:
http://www.dhifi.com/106/110/122/123/2013/0407/213213_2.html#

Price: $5,880HK แลกเปลี่ยนประมาณ 24,000บาท

ด้านหลัง

รูปไปไหน

มาจากอเมริกา

มีปกอัลบั้ม

แบตอยุ่ได้ประมาณ 5ชม. Low-gain
ถ้า Hi-gain อาจจะไม่ถึงอีก....

ความจำ32gb เพิ่มได้รึป่าวก็ไม่รู้....

ที่เรือธงมีให้ลองแล้วนี่ครับ อิอิ

ตอนนี้ทางศูนย์เอามาไว้ให้ทดสอบ ที่สาขาเรือธงเลยครับ มีเตรียมไว้พร้อมฟังเลยครับ

เตรียมหูไปฟัง ส่วนเงินต้องเอาใส่ไหฝังดินไว้ ไม่งั้นกลับมาตัวปลิวอีกแน่ๆ

32GB เพิ่มไม่ได้แล้วครับเมม