Welcome

This site is dedicated to helping you understand and use technology.

This is not a site about the latest electronic gadget, nor is it just a "how to" website. It also has a growing reference section where you can learn and understand the principles behind various technologies. Understanding the technology will make it easier to work with it, rather then just being frustrated with it - or least, you will understand why you are frustrated with technology.

The site is divided into various sections or major topics to help you, namely:

Home AV: explains and demonstrates technologies associated with home entertainment systems: DVD players, flat screen TVs, projectors, PVRs etc. It is general in nature and does not push or mention any particular brand. The reference section explains in simple terms the principles behind the technologies, while the "How do I..." section gives general advise on connecting it all together.

Understanding Audio: has a number of articles to help you understand "audio". This is designed for people wanting to learn about setting up audio systems, or understand more about getting good audio from a PA system. It is written for intelligent novices, particularly teachers, leaders, musicians and students who need to understand their sound system at school, church or group.  It is also useful for PA operators, journalists, videographers and even technicians.

When you are the Technician: was originally written when I was a missionary in Africa. It is designed for people who need to know how to do technical things because there is no-one else around to do it for you. The Fundamentals section covers the fundamental principles for understanding electrical/technical systems and is useful for everyone.

Calculators: is a collection of simple calculators to help better understand and use the audio and electrical principles outlined in the articles of this web site

Myths & Trivia: is a fun section that looks at some of the technical myths that are often mis-understood and some short bits of technical trivia which I find interesting - let me know if you do too.

There are also some simple calculators to play with to help you understand power usage, decibels for audio, speaker placement, amplifier power etc. It can be a useful learning tool to try different values and see the changing results.

I hope you find the information in these articles useful. If you do, please let others know about this resource - you can even click on the Facebook  "like" button in side panel on the lower right of this page. To save you checking in to see what is new, )simply leave your first name and email address in the "subscription" box (also to the right) and I will let you know every now again about new articles.

"Understanding is a fountain of life to the one who has it, but stubborn fools punish themselves with their stupidity" - Proverbs 16:22 GOD'S WORD® Translation (©1995)

 

Permanent link to this article: http://geoffthegreygeek.com/

6-channel-speaker-switch

Speaker Selector Switch Summary

Speaker selector switches are the most common item bought from Amazon through this website, with nearly 100 units bought in the last year or so. Therefore I thought it is high time to look a little deeper at the different speaker selectors and the features available. I also present a table (or 3)  outlining the …

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Understanding Distributed Speaker Systems

Distributed speaker systems are also known as "100 volt line" or "70 volt line" speaker systems. They are used extensively where multiple speakers are required. Distributed speaker systems are commonly used in airports, shopping centers, schools, churches, clubs, car-parks, sports grounds and anywhere multiple speakers are required. They can also be used in homes for …

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Speakers in Parallel Calculator

Simple Calculations If all the speakers in parallel have the same impedance, then the calculation is easy. Simply divide the impedance by the number of speakers in parallel. Example 1: Four 8 ohm speakers in parallel: 8 divided by 4 = 2 ohms. Example 2: Two 4 ohms speakers in parallel: 4 divided by 2 …

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Decibel Calculator for Audio (voltage)

If you don't like formulas then you definitely wont like the formula for calculating voltage ratios expressed in decibels. So, use the following calculators to get a handle on the decibels with different input and outlet levels - just fill out the white input fields, the calculated results are highlighted with the bold colour. These …

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