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Total harmonic distortion or THD is probably the more regular little T.L.A.s (or 3 letter acronyms) you are likely to see in many manufacturers specs. But what exactly is THD, is it all that important and what amount of THD is acceptable for HiFi and AV equipment?

In audio reproduction involving the input stage and output stage of hifi stand there will be a certain amount of noise and distortion exposed to a signal. A number of this distortion is made by the circuits and physical elements introducing signal harmonics at double and triple the frequencies in the original signal. These added signals are technically called Harmonic Distortion. THD is a measure of the differential involving the input stages of the system and the audible extra signal at each harmonic. The THD calculation doesn’t consider the relative amount of each harmonic. EG: One amplifiers output at the 2nd harmonic could be greater than the output in the 3rd. Another could create equal levels in the 3rd and 5th. The two amps would sound completely different yet could have the same measured overall THD.

In many hifi circuits such as amplifiers and pre amps you need to expect a worth of under 1% THD as it is relatively simple to get rid of a lot of THD from amplifier circuits using various techniques. Unfortunately it is actually far harder to stop significant degrees of THD from being produced by the physical components of a setup like the Topping NX4 DSD. Much higher levels of THD are normal in cheaper end speakers especially at higher volumes. Speakers with high levels THD tend to cause “smearing” of audio, and bring about poor imaging along with a “muddy” sound. In reality one should test a component ideally within the room it will be found in and at a volume level chances are it will commonly be heard at to ascertain when the system is acceptable for purpose.

Your home cinema system or audio visual system will need a specific level of cabling to maximise the available sound quality of your system. Therefore you will want to maximise your equipment with digital connections to each and every audio visual component to achieve the best listening experience. The very great news is you can obtain noticeable sound quality improvements from your home cinema system through using suitable digital HDMI interconnects (Hi-def Multimedia Interface).

In this post we explode the industry biased HDMI Cable Reviews and demonstrate how with inexpensive standard HDMI cable you are able to achieve excellent results and improve your home cinema listening experience and get noticeable sound quality improvement via your audio visual system utilising the accessible digital connections.

Picking the best HDMI cables for your system is a pretty straightforward process and there are a few things that need considering before you buy. Firstly, tend not to get brainwashed by retail shops that attempt to sell you the eeogzu expensive cables because they would like you to invest as much as possible as opposed to understanding the needs or requirements of your house cinema setup – don’t be fooled.

Just what exactly HDMI Cable might be best suited for my home cinema system?

Firstly, the basic principle behind HDMI is always to transmit uncompressed digital data via 2 interfaces and digital data cables needs to be mainly compared by the standard of the components and manufacture. The Shanling TEMPO available seem to focus on the more you may spend the greater you achieve – well stop and reconsider. Good quality output of a cheap HDMI connector cable provides the same results as spending 10x or 20x more.