Blog Entries

Consumer Cable Pricing

sales@theavspot.com — Sat, 07 Feb 2009 06:00:00 +0100

I'm just amazed by what the big box retailers do to make up for the sagging profits in the LCD and plasma market. The selling of expensive cables and add ons to the core sale has become an art - they scare you with expensive repair possibilities, tell you stories about how this or that cable will work better in the digital realm so they are worth hundreds of dollars more...

Heres the bottom line on a few things...

If a monitor inside your home is going to fail, it will 9 times [...]

Hiding Subwoofers and Surround Speakers

sales@theavspot.com — Tue, 06 Jan 2009 06:00:00 +0100

We can also name this.... How to Make Your Wife Happy .

OK.. I'll admit it. I'm a total geek, and I absolutely love the look of electronics around my house. Giant sub woofer in the corner? OK with me. Kewl looking silvery-gold cables strewn everywhere.. whats the problem? & [...]

Wireless Speakers and Headphones

sales@theavspot.com — Sun, 04 Jan 2009 06:00:00 +0100

Cutting the wire on audio systems.....

Wireless headphones and wireless speakers have been with us for a while now. I have a pair of wireless headphones I use at night so I don't wake anyone. I wouldnt say they exactly rock - but they do the job of letting me hear the television - albeit with some snap crack and pops.

Wirele [...]

Who invented the Microphone?

sales@theavspot.com — Mon, 29 Dec 2008 06:00:00 +0100

The microphone has become such an integral part of our life that its hard to imagine a world that didnt have one. The invention of the microphone is a bit of a strange story, as the word "invention" might be a little strong of a term for the fellow who gets the credit. Back in 1872, Sir Charles Wheatstone co [...]

Used Just Means That It Works...

sales@theavspot.com — Sat, 27 Dec 2008 06:00:00 +0100

With enough bad news coming off the local cable chanels - many of us are being more cautious about our purchases.

Well done - I don't blame you. However if you make your living in sound, lighting or video - your living will continue

and we all must cont [...]

Saving Money by Making Your A/V System Greener

sales@theavspot.com — Mon, 01 Dec 2008 06:00:00 +0100

Making Your Sound Lighting and Video Systems more Eco-Friendly
Forcing The Greening of A/V Technology to Save Money on the Monthly Power Bill
Admittably, any large or even medium sized sound, lighting and video system is a huge power hog, no two ways about it. No equipment manufacturer that I am aware of to date has changed their focus from great sound and video to efficient and ecology friendly sound and video. Any movement towards saving energy or saving t [...]

Interfacing Audio and POTS

jthomas@multi.com — Fri, 05 Sep 2008 06:00:00 +0100

Interfacing Audio and POTS (Plain Old Telephone Service)

Analog Telephone Overview
Characteristics
Simple Interface

Introduction

In the USA, in spite of all the hoopla about digital-this, digital-that and fiber-optic-whatever, the truth is that many small commercial paging and music-on-hold applications still involve interfacing with the plain old telephone service, or "POTS". (By contrast, if you work in the EU busines [...]

Understanding Acoustic Feedback and Suppressors

jthomas@multi.com — Tue, 19 Aug 2008 06:00:00 +0100

Setting Sound System Level Controls

Correctly setting a sound system's gain structure is one of the most important contributors to creating an excellent sounding system. Conversely, an improperly set gain structure is one of the leading contributors to bad sounding systems. The cost of the system is secondary to proper setup. The most expensive system set wrong never performs up to the level of a correctly set inexpensive system. Setting all the various level controls is [...]

Setting Sound System Level Controls

jthomas@multi.com — Tue, 19 Aug 2008 06:00:00 +0100

Importance

PA Bible Guitar Loudspeakers

jthomas@multi.com — Tue, 12 Aug 2008 06:00:00 +0100

[EV] THE PA BIBLE-ADDITION NUMBER THIRTEEN THE ELECTRIC GUITAR LOUDSPEAKER, A UNIQUE DESIGN

In this addition of the PA Bible, we will discuss the development of loudspeakers for electric guitars to illustrate the special character of these unique speakers.

Electric guitar amplifier designs of the early 60's depended upon hi-fi and general purpose loudspeakers that were then available. These loudspeakers were found to be deficient in two characterist [...]

Selecting Loudspeakers for Religious Products

jthomas@multi.com — Thu, 31 Jul 2008 06:00:00 +0100

Click to download

Distributed Speaker Systems 101

jthomas@multi.com — Mon, 28 Jul 2008 06:00:00 +0100

Distributed Speaker Systems 101
By Rick Kamlet

In a typical paging, background music or noise-masking system, several loudspeakers are placed across a single amplifier in parallel. They must often be
powered at different levels, and the calculations involved in determining the actual load impedance at the amplifier's output can be quite tedious.
A solution for this problem comes in the form of the 70-volt distribution system, which makes calculations sim [...]

JBL Sound System Design Reference Manual part1

jthomas@multi.com — Tue, 15 Jul 2008 06:00:00 +0100

How to wire an XLR to an RCA

jthomas@multi.com — Thu, 10 Jul 2008 06:00:00 +0100

Danger Low Power

jthomas@multi.com — Tue, 08 Jul 2008 06:00:00 +0100

Danger: Low Power

Too Little Amplifier Power Can Produce Too Much

We occasionally hear of speaker owners who damage the high frequency components of their loudspeaker systems using amplifiers that are rated at less- rather than more- power output than recommended. Understandably, they often find it difficult to comprehend how such an amplifier can actually burn out components when they have been told that the loudsp [...]

Dance Club Booklet

jthomas@multi.com — Tue, 01 Jul 2008 06:00:00 +0100

XLR Connectors

jthomas@multi.com — Tue, 17 Jun 2008 06:00:00 +0100

Audio Connection Overview

jthomas@multi.com — Tue, 17 Jun 2008 06:00:00 +0100

Portable Sound Systems for Small Clubs

jthomas@multi.com — Tue, 03 Jun 2008 06:00:00 +0100

Audio in Houses of Worship

jthomas@multi.com — Thu, 22 May 2008 06:00:00 +0100

Sound Terms Common Signal Processing Blocks Specific Examples Introduction

Audio is an essential element in any modern-day religious service. What is heard by the congregation is a combination of the acoustic qualities of the room and the performance of the audio system. Some of the desirable acoustic qualities in a house of worship are:

Reverberance -- when well controlled with early [...]