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Tuesday, May 01, 2012
“What amp do I need to power these speakers?” This is another frequently asked question we receive when customers are buying PA speakers. It can be a complicated answer. The amp must have the correct amount of power and the correct features for your PA system. Here is a guide that may help in your endeavor to find the correct power amp. As a general rule, you should select a power amp that has a power output of 1.5 RMS that of the speaker’s RMS rating. For example, if you have an 8 ohm speaker with an RMS rating of 400 watts, then you would need an amplifier that can produce 600 watts RMS into an 8 ohm load. In the event you have a stereo pair of speakers, you would need an amp that is can produce 600 watts RMS per channel into 8 ohms. Seismic Audio PA Speakers are high quality and can take brief peaks greater than its power rating if the amps can transfer those temporary peaks without distortion. Therefore, we recommend taking advantage of an amp with extra headroom (1.5 X the power rating). This will guarantee that only undistorted power reaches your speakers. Some amps are made to accommodate additional headroom. These particular amps cleanly reproduce those brief outputs that exceed the power rating. If you decide to go with one of these amps, just be sure that it has an output rating, at least 1.5 x the RMS rating of the speaker. Choosing an amp with the correct power rating is essential to high quality sound. You should never run an amp when the power rating is less than the RMS of a speaker as this could cause the amp to start clipping. The speakers in a sound systems can be damaged by running an amp without the proper power rating. It will usually result in constant distortion and can even blow your speakers. We realize that all of this information can be overwhelming. If you have any questions or concerns, you should always call the Seismic Audio Technical Department at 901-363-6030 x1. We will gladly assist you in your decision of which power amp best fits your needs.
Wednesday, March 02, 2011
 Seismic Audio LE-3000 Power Amplifier A common question we get here at Seismic Audio Speakers is: “Should I run my amp in “mono”, “stereo”, or “bridged” mode?” The most basic answer to that question is that it depends on the situation. In order to help you choose which amp mode to use, we’ve compiled some basic information about each amp mode and when to use it. Mono is when you only use one input of your amplifier. Usually, there is a switch on the back of the amplifier to switch to “mono”. This allows you to use only one input, but gives you output on both amplifier channels. For amps without a switch, you can use a splitter cable and use both inputs from a single source output. Stereo is when you use both left and right inputs of your amplifier to provide true stereo separation from the amplifier outputs. This is more commonly used in a DJ setting more so than a live band PA. Bridged mode is when you use one input channel of the amplifier but it combines the power from both channels output into one single output. Example: If your amp is rated at 400watts x 2 at 4ohm, it would be 800w x 1 at 4ohm when used in bridged mode. This is commonly used when powering subwoofers. Bridging an amplifier will certainly give you an added boost of power, but always check with the amplifier manufacturer to make sure you don’t exceed the minimum ohm load.*** *** ALWAYS check with the amplifier manufacturer to find out the minimum and maximum ohm load ratings. Exceeding these limits may result in permanent damage to the amplifier and/or speakers. Different manufacturers use different methods to achieve mono, stereo, or bridged settings. Check the owner’s manual or contact the manufacturer of your amplifier if you are unsure of how to hook it up. We hope this helped amp up your sound!
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