Total harmonic distortion or THD is among the more regular little T.L.A.s (or 3 letter acronyms) you are likely to see in many manufacturers specifications. But exactly what is THD, is it all that important and what degree of THD is acceptable for HiFi and AV equipment?
In audio reproduction between the input stage and output stage of hifi table there will be some noise and distortion introduced to a transmission. A few of this distortion is made from the circuits and physical elements introducing signal harmonics at double and triple the frequencies from the original signal. These added signals are technically referred to as Harmonic Distortion. THD is really a measure of the differential between the input stages in the system and the audible extra signal each and every harmonic. The THD calculation doesn’t think about the relative level of each harmonic. EG: One amplifiers output at the 2nd harmonic may be greater than the output at the 3rd. Another could create equal levels in the 3rd and 5th. Both amps would sound completely different yet could have the same measured overall THD.
Generally in most hifi circuits including amplifiers and pre amps you ought to expect a value of lower than 1% THD since it is relatively simple to get rid of a lot of THD from amplifier circuits using various techniques. Unfortunately it is far harder to prevent significant amounts of THD from being made by the physical elements of a setup such as the Hifi Audio. Much higher degrees of THD are common in cheaper end speakers especially at higher volumes. Speakers with high levels THD have a tendency to cause “smearing” of audio, and bring about poor imaging as well as a “muddy” sound. In fact one should test a component ideally within the room it will be used in as well as at a volume level it is likely to commonly be heard at to find out in the event the system is appropriate for purpose.
Your house cinema system or audio visual system will need a specific level of cabling to maximise possible quality of sound of your system. Therefore you will want to improve your equipment with digital connections to each and every audio visual component to obtain the best listening experience. The very fantastic news is that you can obtain noticeable audio quality improvements from 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 show you how with inexpensive standard HDMI cable you can achieve excellent results and enhance your home cinema listening experience and obtain noticeable quality of sound improvement via your audio visual system utilising the accessible digital connections.
Choosing the best HDMI cables for your system is a fairly straightforward process and there are a few things that need considering before buying. Firstly, tend not to get brainwashed by retail shops that try to sell the eeogzu expensive cables simply because they want you to spend as far as possible as opposed to comprehending the needs or requirements of your house cinema setup – don’t be fooled.
Just what exactly HDMI Cable might 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 Shanling amplifier available seem to focus on the more you spend the more you accomplish – well stop and reconsider. Top quality manufacture of an affordable HDMI connector cable gives the same results as spending 10x or 20x more.