EARTUBE USER MANUAL
Dear music-lover, The CORDA EARTUBE-1 is a small-power amplifier, specially designed to drive headphones. It offers a sound quality and driving capabilities far beyond that of an ordinary headphone socket found on a CD-player or amplifier and thus allows you to exploit the full sonic potential of your phones. Due to the close contact to your ears, headphones provide an extreme channel separation whilst listening to stereo recordings.
Safety precautions Children and minors are not to use the device and should be kept at a safe distance from the device while it is running. Do not run the device without the top cover in place. Voltages inside the amp can be lethal and temperatures are high. Please check that the mains voltage printed on the bottom panel of the amplifier corresponds with the mains voltage in the country where you intend to use the amplifier. Disconnect the powercord before any service to the amplifier.
Connections At the rear side of the CORDA EARTUBE-1 two pairs of inputs allow you to connect two different audio sources that have typical output voltages above 0.1 Volts (CD-player, cassette-player, tuner, minidisc-player, ...). The source you want to listen to can be selected by the switch at the left front side of the amp. If your audio system already contains a central preamplifier or integrated amplifier you may prefer to connect the EARTUBE-1 to the tape-out of your central amplifier.
Activation of the device Before connection of the CORDA EARTUBE-1 to the mains, please check the voltage required. The proper value can be found on the bottom-side of your device. After connection the EARTUBE-1 can be switched ON/OFF by the power switch. While switched ON the LED on the front side will be lit. It takes around 10 seconds before the amp is fully activated. We recommend to power the amplifier ON approximately 15 minutes before use.
Directional listening In normal daily life people use various mechanisms to locate sources of sound. Firstly, the sound of a source to the right side of the listener (e.g. the right loudspeaker) not only reaches the right ear but, attenuated and delayed, is also heard by the left ear. The level of attenuation and the delay time of this crossfeed signal provide important directional information. Secondly, the soundwaves are partly absorbed and partly reflected by the tissues of the head.
The natural crossfeed filter In principle, digital soundprocessors can simulate all the mechanisms for directional listening but the results are, thus far, not very satisfactory. In particular, pinnae-reflections are very complex and listener-specific and impossible to simulate accurately. Fortunately, the main directional information is provided by the time delay and level of attenuation of the sounds that reaches the opposite ear.
Replacing tubes The EARTUBE-1 uses three tubes 6N3P and two tubes GU17 (or its equivalents QQE03/12, RS1023, 6360) If you want to exchange tubes, please disconnect the power cord before removal of the top cover. Also make sure that all pins are properly mounted into the sockets. It is not uncommon that a pin is bend and doesn't enter the socket. Do not run the device without the top cover in place! Technical data Measures: 28 x 30 x 11 cm Weight: 6.
CE – Confirmity Declaration Of Conformity Manufacturer: AudioValve, Germany, 34123 KASSEL, Umbachsweg 70, info@audiovalve.info Product Name: ASSISTENT 100 Product Type: Audio Amplifier Complies with Standards: LVD: 92/31/EEC, 93/68/EEC, & 73/23/EWG Safety: EN60065 EMC: EN55013, EN55020, EN55022, EN55103, EN61000-3-2, & EN61000-3-3 The official Declaration of Conformity for this product is kept on file at: AudioValve, 34123 Kassel,Umbachsweg 70, Tel.
WARRANTY AUDIOVALVE warrants its components for a two - year period on all electronics and a 90day period on the tubes from the purchase date. In the event of a failure of your amplifier , AUDIOVALVE will repair or readjust this unit or , should the occasion arise , will replace it provided that all conditions stipulated in this warranty are met. In order to initiate service of any kind it is necessary to obtain distributor or dealer authorization prior to shipping the unit for service.
WARRANTY REGISTRATION Please fill out and return this warranty form to the distributor within 15 days of the purchase date with this form here, or make it online on our webside.
