20 Most Recent Audio Technica ATH-A900 Professional Headphones Questions & Answers

In fact the insulated inner wire (the white tube) is the signal carrying wire. The outer wires without insulation are connecting ground (GND). Both wires have to be connected to the speaker in the ear piece in order to (re-) build a circuit.

hi.First of all: This headphones don't have a single srew. So be extremely carefull as everything is glued !#1 - Removing the logo plateThis isn't need to reach the wires. Just for cleaning purposes.Remove de soft ring-pillow from the earing.Remove the textil thick black ring that is glued by the internal outside gently.Look for the three black metal small wings that belong to the logo plate and are inserted to the internal side and are glued and/or bended. Unbend them.Then pull this wings in order to extract the plate by the outside side the logo plate.#2: Accessing the speaker and it's wires.This is a very carefull procedure. A mistake and you'll have scrap instead!Remove the soft ringed pillow from the earing. In the border that the blacksinthetic leader was inserted, insert a medium screwdriver. Gently swingthe driver up and down in order to separate the plastic disc that supportsthe ringed pillow from the outside hat of the earing. Do this in circles fora couple of times or until you begin to ear the glue lightly cracking. Afterthis the plstic disk separates from the outside hat and all the electricwiring and speaker are free to repair.NOTE: A piece of advice: do NOT use instant glue or cyanide glue to re-assemble. It would be the last repair! Pedro Regueiras

If you have replaced the cartridge then it must be the cartridge pre-amp that is faulty. If there are any other functions on the device such as CD, then it will not effect them. Unless there is crackling on any other function then the pre-amp has a problem. The pre-amp itself is generally a single IC. You can find it by following the turntable connection back to the inside of the amp. The signals will pass through the IC before being passed to the main pre-amp.

Use an alternative device connected to the input the turntable usually connects to. If both channels work ok the new turntable is clearly faulty and should be returned under warranty.

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You should go back to the local repair shop and ask them to do the job right or to give you the money back you presumably paid. You have a legal right to have them fixed properly.

Having looked at the turntable it seems to mount the cartridge with two bolt like fittings. The Cartridge you want has two mounts on the side that will take those bolts. You will have to adjust the arm to compensate for the weight differences between the two cartridges, but once done it should play fine.

I have used this article to set up my dual turntable. Cartridge Alignment The Basics Explained Tracking force: 1.5 to 2.5g Your cartridge specifications are in the following link. Audio Technica AT91 Hope this helps?

There are a number of helpful videos on YouTube about this model turntable, it might give you the answer you need.

Contact this site Audio Technica Turntables Phono Cartridges Needles Accessories Also, they have a toll free phone number

Normally, yes. If you'\'re not sure how to track down the part that's broken, contact the maker for an ra to return it for service.

This is the only thing I could find online: 1 - shield 2 - left (hot) 3 - left 4 - right (hot) 5 - right