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Tech terms you will come across
A memory buffer that stores audio data to avoid sound glitches. Usually a feature of mobile systems such as DVD, CD and MiniDisc players
Various ways of trying to prevent theft. These can include a detachable or masking faceplate, or keycode systems
A unit that holds multiple discs, swapping them as necessary. Most often used with CD or DVD players
An analog tuner uses a tuning knob or thumbwheel and pointer to show the frequency selected. A digital tuner has a digital frequency read-out and preset buttons for touch tuning
A measurement of the deviation from the original signal to the reproduced signal. Distortion often sounds harsh
Formerly AC-3, Dolby Digital is a method developed by Dolby Laboratories to digitally encode up to 5.1 channels of high-fidelity sound in a single digital bitstream (front-right, centre, front-left, surround-right, surround-left, subwoofer)
The element of a speaker that actually produces the sound
Digital Theater Sound, from the company of the same name. DTS does much the same thing as Dolby Digital. The two systems are incompatible. It was originally designed for movie theatres
Generally, the difference between the loudest peak and softest sound
A circuit or program that changes the frequency response of a signal, boosting or cutting selected ranges from the overall response
Also called Frequency range. This is the spectrum of frequencies produced, within a certain tolerance. For example, a frequency response of 30Hz to 18kHz (+/- 3dB) means all frequencies in that range without dropping or peaking three decibels
The controller component usually mounted in the dashboard
Impedance is commonly listed from 4 to 8 ohms, with some ranging from 2 to 16 ohms. This is a technical description of the amount of inductive resistance a speaker offers to the flow of electrical signals from a receiver. Usually, impedance doesn't affect sound quality
OEM (original equipment manufacturer)
The factory-installed system. Many car manufacturers use name brand products, either standard or as part of an upgrade package
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The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.
My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.