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by Jerrry on March 18th, 2007

Jerrry

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How do you hook-up a microphone ? Sony receiver Model # STR-AV1020

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Answers. 1 helpful answer below.

  • by RedJohn on March 19th, 2007

    RedJohn

    This can be done quite easily with any home audio amplifier. You have a couple of options as to how to go about it.

    All line-level inputs on home audio equipment are electrically the same, except for those that are labelled "Phono". These have additional amplification and specialized filtering for use with phono cartridges. The only difference in the label, so just about any input is suitable. Microphones, however, require additional amplification and have specific electrical requirements.

    First, you will need to know a couple of things about the microphone:
    - Does it have a low-impedance or a high-impedance output?
    - Does it require an external power supply and, if so, what voltage does it require?

    You can connect the microphone to the input of a stand-alone microphone preamp. The preamp needs to have a line-level unbalanced output compatible with home audio equipment, preferably equipped with an RCA connector. Any preamp that can be connected to the line-level input of an audio card in a computer are suitable.

    There are dozens of microphone preamps on the market, but you do need to know what the needs of your specific model before you purchase one and to find out whether or not it can be connected directly to home audio equipment. If you want to use a powered condenser microphone, the preamp must also include a phantom power supply for the microphone (usually +48VDC). The staff in the store where you buy the equipment should be able to answer specific questions and make appropriate recommendations.

    Alternately, you could use a small mixer, such as those sold for home audio and video recording and editing or for use with a DJ setup. It will also need to be matched to the type of microphone you are using or planning to use in the future. Radio Shack, for example, sells an inexpensive DJ mixer for US$100, which can handle a single low-impedance dynamic microphone with either 1/4” (tip-ring) or 3-pin XLR connectors. It also has line-level and phono inputs and outputs for use with home audio equipment. However, since it is meant for DJ use, it is limited to a single microphone input. RS also sells a very basic 2-channel stereo / 4-channel mono mixer for about half the price. If all you are interested in is a microphone or two, it might be more suitable. These sit at about the bottom end of the price and quality range.

    The more flexibility you want, the higher the cost. Ditto for sound quality. If you pay $10 for a microphone, it will sound like it. A $10 mixer or microphone preamp is not any better. You can’t make a poor-quality source better. A basic omnidirectional or cardioid microphone can be purchased for about US$50. Avoid inexpensive wireless microphones. A basic mixer or microphone preamp will cost the same.

    I would avoid internet sales, unless you know exactly what you are looking for. You can end up buying equipment that doesn’t do what you want or expect, which you could have trouble exchanging. There is a lot of audio equipment available second-hand, but you need to make sure it will meet your needs.

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