Music Gear News
PA Speaker Terms Explained
Active or Passive?
Active (or powered) Speakers have a power amplifier built into them, making them versatile as most have direct inputs for microphones and line inputs for other music sources such as MP3 and CD players.
Passive Speakers require the use of an external power amplifier for operation. When selecting an amplifier for your system, it must match the Power rating (Watts) and Impedance (measured in Ohms) of the speakers you are using. Passive speakers connect to the amplifier with a heavier grade speaker cable.
Your Loudspeakers is likely to overheat and fail if too much power is put through it. Wattage measures how much power your speaker can handle and is most typically denoted as Watts RMS. This is essential to take note of when choosing a loudspeaker as it ensures the speaker will perform to optimum volume without distortion or risk of being damaged. Other terms relating to power include Peak Power which takes into account the amount of power a speaker can handle for very brief amount of time (we're talking milliseconds), and
PMPO (Peak Music Power Output)- both these values are not very useful when matching speakers with amplifiers or comparing volume of one system to another.
Loudspeaker impedance, represented in Ohms, measures what the current flow from the power amp is working against. Knowing the correct impedance is essential in conjunction with power to prevent damage and ensure the speaker is performing correctly.
Sound Pressure Level
Sound pressure level, or SPL, is measured in decibels (dB). Often a maximum SPL level is given to indicate the loudest volume an audio system can provide. Although this measurement is subjective and depends on the same audio passing through each speaker for an accurate comparison, it is still useful when comparing the volume of different speaker systems.
The frequency response tells you how well the speaker can respond across the audible frequency range. Usually, this is represented as the upper and lower limits- from the lowest frequency the speaker will reproduce to the highest frequency. The lower frequencies are represented in 'Hz' and the higher frequencies represented by 'kHz'. An example of a frequency response would be: '30 Hz to 20kHz'.by Alice Thomson
Posted on 24 Jun 2013 11:47 to category : Tips and advice
Related Music News
Update available to improve performance and fix bugs.
Shure recently discussed how guitarists can achieve great results when recording at home or in a small project studio. We took a look and picked out our favourite points.
Recreate the Brazilian carnival atmosphere at your World Cup party with our Samba instruments.
Many parents want to encourage their child to take up an instrument early on in life. Music can be a fun and rewarding activity for children but knowing where to start can be tricky. Here are our top picks for ideal starter instruments for children under 7.
You've spent ages perfecting your sound and now it's time to let others hear it too. Read our 8 Tips for Putting on a Great Live Show.
When you're shopping for a loudspeaker, often the specifications can seem a bit confusing! Use this guide to help you demystify common terms and find the right speaker for your needs.
Recent Music News
Only 22 Adam Clayton Signature Model Bass Guitars in Purple Sparkle Finish are available in the UK
Announced at this year's NAMM Summer Show, the Fender Justin Meldal-Johnsen Road Worn Mustang Bass is now available
The KHDK Kirk Hammett Ghoul JR Overdrive delivers signature overdrive/distortion tones in a tiny micro-sized pedal format
Wampler announces the Tumnus Deluxe Overdrive Pedal - a new and improved tribute to a renowned overdrive pedal
The Epiphone Ltd Ed Joe Bonamassa 1958 "Amos" Korina Flying-V Guitar Outfit is a highly collectable yet gig-able instrument, with special signature appointments
The Apogee MiC Plus builds on the success of the 2011 MiC, bringing plug-and-play studio-grade recording quality to iOS devices and laptops