Mic / Line Radio Interference Filter - Eliminates Radio Station Pick-up on Sound Systems

The Mic / Line RFI Filter from Alectro Systems eliminates annoying radio interference on sound systems.

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Audio Line Level De-coupler - Eliminates AC Hum caused by ground loops

Are you getting AC Hum on your sound system? This is usually caused by a ground loop between your mixer and other pieces of equipment such as a DVD player or computer. This de-coupler completely eliminates this problem.

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Mobile Vehicle Intercom Systems With Siren

These systems were designed for the armored vehicle industry to allow the driver to communicate with a person outside, without opening a window. A dual version adds communication with a passenger in the back of an armored truck.

As well as an intercom, they also include a siren.

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Door Alarm with Adjustable Delay - Great for Freezers & Fridges

The DA-7DP door alarm warns you when a door has been left open. When the door is first opened, it remains silent for a pre-determined (adjustable) period of time. After this, it emits a loud tone to warn you that the door has been left open.

You'll never leave the freezer door open again with this device. A loud tone reminds you that the door is open.

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Sound Operator's Handbook and Power Point Training Course with Narration

"Everything you wanted to know about sound but didn't know who to ask". The handbook is in Acrobat Reader format, and the course is about 3 hours long in Power Point. It applies to all sound system configurations and equipment.

Both versions are available as a download and on CD.

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Sound System Design and Installation Book

The Complete guide to Professional Live Sound Reinforcement System Design and Installation,

By teaching you how to do it right the first time, this book can save you thousands of dollars and years of frustration.

This book is in Acrobat Reader format available as a download and on CD

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Acoustic Guitar Low Pass Filter Cable

The NPPLP series of cables are designed for Acoustic Guitars with built in Pick-ups.
When a passive Pick-Up is installed in an Acoustic Guitar, the sound from the Pick-Up is often "thin" and "tinny". The NPPLP Cable corrects this.

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