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Entries for May, 2007

What is Power-over-Ethernet (PoE)?

Power-over-Ethernet Overview
Power-over-Ethernet (PoE) or “Active Ethernet” eliminates the need to run 110/220 VAC power to Wireless Access Points and other devices on a wired LAN. Using Power-over-Ethernet system installers need to run only a single CAT5 Ethernet cable that carries both power and data to each device. This allows greater flexibility in the locating of [...]

Social Engineering & Social-Reverse Engineering

/* Social Reverse-Engineering */
Mungkin beberapa dari kalian sudah pernah mendengar bahkan sudah mempraktekkan yang namanya Social Engineering (SE), bagi yang belum pernah mendengar ataupun tidak mengetahui apa yang dimaksud dengan Social Engineering maka akan saya jelaskan terlebih dahulu supaya anda tidak mengalami kebingungan ketika membaca artikel ini. Social Engineering adalah suatu keadaan atau kejadian yang [...]

Ohm’s Law

Voltage (volts) is the force that moves electrons, forcing a current. Voltage can be compared to a tank of water elevated at a certain height (potential). If the tank is placed low (low voltage), water will not flow very quickly (low current). [...]

Understanding Ohm’s Law

Understanding what ohms are and how they relate to car audio is most helpful when trying to determine optimal wiring configurations for connecting multiple speakers to an amp. There are some basic electrical engineering formulas I will use on this page. Fortunately they are fairly simple.
Ohm’s law: Current = Voltage / Resistance or I = [...]

Amplifiers Basics

Amplifiers
Your amplifier takes the signal from your head unit and makes it large enough to be able to drive your speakers. It is preferable to use separate amps for high and low frequencies but it is not necessary. The problem with using one amp for all frequencies is that you cannot adjust the levels among [...]

Amplifier Power Specifications!

This page is intended to explain amplifier power specifications in more detail. I have a BS in Electrical Engineering so I do not know how much of this the average Joe is going to understand. I am also human so there may be mistakes below.
Amplifier power ratings are important [...]