Total harmonic distortion or THD is one of the more regular little T.L.A.s (or Three letter acronyms) you will probably see in many manufacturers specifications. But exactly what is THD, could it be everything that important and what level of THD is appropriate for HiFi and AV equipment?
In hifi stand between the input stage and output stage of any hifi system there will be a certain amount of noise and distortion introduced to a signal. Some of this distortion is created by 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 a measure of the differential between the input stages in the system and also the audible extra signal at every harmonic. The THD calculation doesn’t think about the relative level of each harmonic. EG: One amplifiers output in the 2nd harmonic might be more than the output on the 3rd. Another could create equal levels on the 3rd and 5th. The 2 amps would sound very different yet could have a similar measured overall THD.
Generally in most hifi circuits including amplifiers and pre amps you ought to expect a price of less than 1% THD since it is easy to remove a large amount of THD from amplifier circuits using various techniques. Unfortunately it is far harder to avoid significant levels of THD from being produced by the physical components of a setup including the hifi speakers. Much higher amounts of THD are common in cheaper end speakers especially at higher volumes. Speakers with high levels THD often 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 and at a volume level chances are it will commonly be heard at to ascertain in the event the product is acceptable for purpose.
Your house cinema system or Topping amplifier will demand a certain level of cabling to maximise possible audio quality of your system. Therefore you should improve your equipment with digital connections to every audio visual component to obtain the best listening experience. The great news is that you can obtain noticeable audio quality improvements from your own home cinema system through using suitable digital HDMI interconnects (High-definition Multimedia Interface).
In this article we explode the market biased HDMI Cable Reviews and show you how with inexpensive standard HDMI cable it is possible to achieve excellent results and boost your home cinema listening experience and snjfol noticeable audio quality improvement via your audio visual system utilising the available digital connections.
Finding the right HDMI cables for your system is a reasonably straightforward process and there are a few things that need considering before you purchase. Firstly, tend not to get brainwashed by retail shops that try to sell you the most costly cables since they want you to spend as much as possible as opposed to comprehending the needs or requirements of your property cinema setup – don’t be fooled.
Just what exactly HDMI Cable would be best designed 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 should be mainly compared by the caliber of the components and manufacture. The Shanling CD player available manage to focus on the more you may spend the more you accomplish – well stop and think again. Top quality creation of a cheap HDMI connector cable gives the same results as spending 10x or 20x more.