| Question: What's the difference between parallel and series speaker connections? |
Answer: Speakers are connected in series when the first speaker's positive terminal is connected to the next speaker's negative terminal. Speakers are connected in parallel when all the speakers' negative terminals are connected together and all their positive terminals are connected together.
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| Question: What are the holes in the back of the speaker for? |
Answer: Small to medium speakers will often have small holes in the back for wall mounting. These will either be keyhole slots or screw holes for attaching a bracket.
A larger hole is a speaker port.
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| Question: What size enclosure should I use for my speaker? |
Answer: This is a common question; unfortunately, we cannot assist with designing speaker enclosures, and can only recommend that you refer to a book on speaker design.
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| Question: What are thiele-small specifications, and how do I get them? |
Answer: The Thiele-Small specifications are a set of parameters used to describe the audio characteristics of a speaker driver, named for Neville Thiele and Richard Small. The ten original Thiele-Small parameters are Fs, Pe, Qes, Qms, Qts, Re, Sd, Xmax, Vas, and Vd. The parameters Xmag and Xsus have been added to this list.
Thiele-small specifications are not generally available on our older speakers. If they are available for a particular speaker, they will be listed in the speaker documentation.
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| Question: What is the difference between sensitivity, SPL and sound-pressure level? |
Answer: Sensitivity, SPL and sound-pressure level all refer the same specification.
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| Question: What do the different speaker specifications mean? |
Answer: The table below lists various electromechanical specifications available for speakers, with links to the definitions within our on-line glossary.
The table below lists and defines additional specifications, with links to defined terms within the glossary.
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| Question: How do I connect automotive (4-ohm) speakers to a home stereo system (8-ohm)? |
Answer: In order to get the correct impedance, you would need to wire 2 speakers in series for each speaker output on the home stereo system. Wiring two 4-ohm speakers in series results in a total impedance of 8 ohms. The speakers should all be the same wattage, and the wattage should match the power output of the stereo.
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| Question: What do I use to cut out high-frequency sound for a bandpass tube or woofer? |
Answer: You can use a universal crossover network such as the 400-1296 Universal Crossover Network.
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| Speaker Accessory Answers |
| Question: What is a resistive L-pad? |
Answer: A device with two variable impedance pads, developed to provide a constant impedance (generally 8 or 16 ohms) with respect to the amplifier and to control the output level for tweeters and midrange speakers. For additional info, see the L-Pad entry in the RadioShack On-line Glossary.
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| Question: How do I mount RadioShack's bookshelf and/or diecast speakers? |
Answer: The OmniMount speaker mounting systems sold by RadioShack should work with all of our die-cast and bookshelf speakers.
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| Question: What bracket do I need to wall-mount my speaker? |
Answer: The necessary bracket depends on which speaker you have. For specific information, we recommend that you contact either your local store, call RadioShack.com at 800-241-8742 or send e-mail to our Product Support team with the catalog number of your speakers.
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