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之前的MKI版本很少有人提起，但新一代的MKII版本励精图治，增加很多RKV用家期待的功能，包括平衡输入
: integrated stereo pure tube amp masterpiece class "A" for low impedances headphones - and speakers too ::
The new Eartube Mark II headphone amplifier will come out in a new and wonderful looking re-design in optic and technicial thinks.
It will be in the same heavy laser cutted chassis as our other amplifiers, with some new features ......
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A better and special output transformer ( PIKATRON )with the possibility of the connection for a pair of 8 ohms loudspeakers
Balance control +/- 3dB
Stereo analog volume panel meter
One pair of XLR inputs (+ only )
2 pairs of 8 ohm Speaker output terminals ( speaker efficency up tp 94 dB )
For many interested earphone-enthusiasts, who spend a lot of money on their hobby, only a melodious tube amplifier is possible as a driver. The answer to the question: „ Which do I take? “ can only say: the EARTUBE of AudioValve!
The Eartube was developed especially for the highest-quality reproduction with earphonesand serves very well impedances of 16 to 200 ohms. He unfolds his big strength with roughly 4 watts per canal in 100 ohms. For that reason he is very well suitable e.g. for the K1000 by AKG.
The Eartube is a pure tube amplifier and owns no semiconductor in the signal way. Merely the stabilization for the tube heatings and anode tensions occurs highly exactly with semiconductors.
The amplifier owns two switchable entrances with different delicacy. Thus can be connected, e.g., CD player and TUNER at the same time.
The input circuit of the amplifier owns three tubes of the Type 6N3P and prepares the signal for the output stage tubes. In this area of the circuit also the volume potentiometer with the shiftable or detachable Crossfeed filter is located, to distribute potential signal bass charge on merely one ear to both ears.
The output stages use the power Tetrode of the type: QQE 03/12 as the military version by SIEMENS and work in circuit PP with a transformer which is tuned especially to the interests of earphones.
The final tubes work constantly in Class A and are postregulated automatically optimally in the Bias closed current, so that tolerance and aging of the tubes do not matter.
The care tensions are won from a strong, free of litter, Torodial-Transfomator. The amplifier itself rests on one single two-page printed circuit board and was adapted signal-technically optimally. For this reason also the potentiometer is in the rear part of the printed circuit board to hold the signal way short. All parts on the PCB are of the best quality and selected carefully to do justice to the requirements of the reproduction in every regard. The case is from metal and prevents interferences from the outside. It is available in the colours black and silver.
Like all products of AudioValve this amplifier also distinguishes itself especially by his exceptional musicality which is based at last also on the fantastic technical values of the circuit and their stability. As a user you will be able to enjoy this product in the highest perfection for many years enthusiastically and come with it to the pleasure of fantastically detached musical reproduction with your headphones.
echnicial specifications - EARTUBE basic tube amplifier model:
As a second model of its amplifier named EARTUBE MARK II - USB. In its amp, we have installed a very populare DIGITAL audio player for USB sticks or SD cards. Its player can handle memory size up to 8 GB and supported MP3 and WAV files. An FM reseiver is integrated too. You can direct select your music titles by panel buttons on front or with the remote control. Its nice to handle and simple to use and satisfight everyone who like to hear memorized digit music from sticks .....
Digital Audio Player - technicial describtions and possibilities:
* Play music from any USB / sticks or SD - card up to 8 GB with MP3 or WAV format files / FM radio integrated
* Built in RTC clock cirucit with time /alarm function
* MP3 / WAV decorder support 32–320kbps. 18-bit resolution with no missing codes, Dynamic range: 99 dB, sample rate: 48kHz
* Play/Pause, Next ,Previous ,Vol- ,Vol+ ,Stop, EQ ,Repeat ,Mute
* FAT16 or FAT32 systems supported
* Memory the song number and volume even power cut down
* With Remote control
* Power supply optional (DC 3.7V / 5V)
* Built in Amplifier Optional
* LCD display
Keys function on Pannel
Power : Long press for stanby ,and lon g press again will wake up .
Set : Setting for Time Alarm Sleep Language Finish
VOL- : Volume down and minus for setting Time , Alarm ,and Timing swith off.
VOL+: Volume down and Plus for setting Time , Alarm ,and Timing swith off.
Play/Pause : Short press for Paly or Pause for USB and SD state (also for
auto-search channels and save them in FM state)
Remote Control Keys function
Power : ON/OFF (standby )
Mode : Switch order will be USB SD FM USB (if have USB memory and SD card) , Switch order will be USB FM USB (if only have USB memory) Switch order will be SD FM SD (if only have SD card )
PREV :Same functions as Previous Button on pannel
NEXT: Same functions as Next Button on pannel
VOL+ : Same functions as VOL+ Button on pannel
VOL-: Same functions as VOL- Button on pannel
REP: For switching one song repeat or all song repeat in USB/SD state,
default is all song repeat .
*SET : Setting for Time Alarm Sleep Language Finish
MUTE: First press mute , press again will release from mute.
EQ : NORMAL, JAZZ, ROCK, POP, CLASSIC, COUNTRY
PLAY/PAUSE : For play and pause in USB/SD state , for auto-search
channel and save them in FM state.
Button 0-9 : select song in USB/SD state, if the song number over 9 , just input the numbers in series.
After the summer vacation we will have as a new unit an digital audio player who can handle USB - sticks or SD - memory cards up to 8 GB with music files in MP3 and WAV file format. Also its unit have a FM receiver. Its functions all can be handle from front panel buttons or from the remote control.
The best of all is - its unit has an MM - phono amplifier integrated too. The technologie is very popular "OLD SCHOOL" transistor technology and very very good to combine with a vinyl turntable player.
On the front panel its goods is a selector to select between PHONO - or - DIGITAL PLAYER mode, so the back panelo its model have only 2 pairs of RCA jackets ...
MM input from turn table
One line OUTPUT for the pre amplifier.
We deliver its unit with an universal main power adapter for 100 - 250 VAC and a remote control.
tech. details:
1) digital - player, same details like the EARTUBE MK II - USB
2) MM - phono moule
output impedance: 450 ohm
input impedance: 47 kOhm
RIAA accuracy: +/- 0,2 dB
noise: -72dB
distortion:0,014% ( 1V rms output signal )
gain: 50dB
 
[ 本帖最后由 davidxtb 于 2012-11-26 00:01 编辑 ] |
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发表于 2012-8-3 14:52:00
提升卡
变色卡
楼主
如此设置，反而是将电源开关所收到的干扰因素减小，而将低阻适配器放在后面，并且在后部设置功放的输出端口，也是为了方便驱动KK或者箱子的需要的同时确保前面板的美观简介 就外观来说，是巨大的进步RKV最终将这款给CORDA 代工的产品外观改成自己传统的风格了，而且颇巨现代感
