Total harmonic distortion or THD is one of the more regular little T.L.A.s (or 3 letter acronyms) you are likely to see in most manufacturers specs. But what exactly is THD, is it all that important and what degree of THD is acceptable for HiFi and AV equipment?
In audio reproduction in between the input stage and output stage of E&T audio rack you will see a certain amount of noise and distortion brought to a signal. A number of this distortion is made from 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 really a measure of the differential between the input stages from the system as well as the audible extra signal at each harmonic. The THD calculation doesn’t think about the relative amount of each harmonic. EG: One amplifiers output on the 2nd harmonic may be more than the output at the 3rd. Another could create equal levels at the 3rd and 5th. Both amps would sound completely different yet could have the identical measured overall THD.
Generally in most hifi circuits such as amplifiers and pre amps one should expect a value of under 1% THD as it is easy to eliminate a substantial amount of THD from amplifier circuits using various techniques. Unfortunately it is far harder to prevent significant levels of THD from being created by the physical aspects of a setup such as the Topping NX4 DSD. Much higher amounts of THD are typical in cheaper end speakers especially at higher volumes. Speakers with higher levels THD often cause “smearing” of audio, and lead to poor imaging and a “muddy” sound. The truth is you need to test a component ideally in the room it is to be utilized in and at a volume level chances are it will commonly be heard at to ascertain if the product is acceptable for purpose.
Your house cinema system or audio visual system will require a particular amount of cabling to maximise possible quality of sound of your system. Therefore you should maximise your equipment with digital connections to every audio visual component to get the best listening experience. The very fantastic news is that you could obtain noticeable sound quality improvements out of your home cinema system through using suitable digital HDMI interconnects (High Definition Multimedia Interface).
In this post we explode the industry biased HDMI Cable Reviews and demonstrate how with inexpensive standard HDMI cable it is possible to achieve excellent results and improve your home cinema listening experience and acquire noticeable sound quality improvement through your audio visual system utilising possible digital connections.
Picking the best HDMI cables for your own system is a fairly straightforward process and there are several things to be considered before you purchase. Firstly, tend not to get brainwashed by retail shops that try to sell you the eeogzu expensive cables since they would love you to invest whenever possible rather than understanding the needs or requirements of your home cinema setup – don’t be fooled.
So what HDMI Cable would be best best for my home cinema system?
Firstly, the fundamental principle behind HDMI is always to transmit uncompressed digital data via 2 interfaces and digital data cables should be mainly compared by the standard of the constituents and manufacture. The HiFi Audio available manage to focus on the more you would spend the greater you accomplish – well stop and reconsider. High quality creation of an affordable HDMI connector cable provides the same results as spending 10x or 20x more.