Archive for June, 2011

Could a phono preamp be just what you need?

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June 15th, 2011

You may have heard of the phono stage, or phono preamp as it is sometimes called, and wondered why it would be necessary. Presumably, you might think, a built-in amp would be better?  However, when looking for the clearest sound quality, a combination product can be a false friend, and often contains the bare minimum of everything they offer.  Basically, sharing a single power supply between the electrically noisy turntable motor and the extremely sensitive preamp stage is often not the best solution.  In fact, the phono amp is often the best way to achieve a really high quality sound.

The output from a magnetic cartridge installed in a good quality turntable is significantly lower than that provided by a CD or a tape, and hence needs an additional stage of amplification.  The recording process used to create records also adds equalization which must be removed during playback to restore proper tonal balance.  Most older receivers and amps used to be fitted with an additional gain and re-equalizer stage, allowing direct connection of a turntable.  In order to check whether your equipment has this is easy; you just need to look for PHONO on your source selector switch, and jacks labelled PHONO on the other side.  Newer stereo equipment made after 1990 tends not to have phono input.  This is the case with most mini-systems and home theatre units as well as many stereo receivers and amps.  Managers seeking to lower production costs started to leave out the phono input because records and turntables are often seen as useless in today’s world of CD and DVD technology.
Quite a few preamped tables provide little or no shielding for the preamp section, feature tone arms with pin-type pivots and have plastic platters. This kind of machine is being sold as component stereo equipment despite the fact that it is actually quite outdated.

It is also possible to buy USB turntables, which are often sold on television shopping channels and in shopping centres. The USB converter in the table connects directly to your computer, bypassing your sound card and line output.  However, the ADC in your sound card or laptop is generally better.  This can leave you with MP3 files and CD-Rs that are too loud or too soft when compared with shop bought CDs and other music sources.  Moreover, some USB turntables have ceramic cartridges, and so risk ruining the record.

The phono stage is, therefore, the best way of ensuring you meet your audio needs.  There is no need to compromise on sound or the health of your equipment when using a phono preamp.  It is relatively easy to buy the phono amp on the internet for a reasonable price, so there is no excuse for not setting up the best possible system for your music.

Please visit http://www.whestaudio.co.uk/ for further information about this topic.

http://www.whestaudio.co.uk/

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Audio Visual

London kickboxing classes provide a whole-body workout

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June 7th, 2011

If you’ve ever considered trying kickboxing, London is a great place to look. If you haven’t, then you might find it an interesting surprise. In London, kickboxing classes come in all different types, and you’ll certainly find something that meets your requirements. Kickboxing is great for many different aspects of fitness, and depending on the London kickboxing club you opt for you will find yourself majoring in one or more of these. For example, most people’s first impression of kickboxing is that it is all about sparring (a technical term for fighting to set rules). Whilst sparring can be an important part of kickboxing, it is by no means the only one. For a start, you will need to become proficient in the basic moves before you even think about sparring – punches, kicks, blocks and avoiding. That will involve a lot of work in itself; stepping into the ring isn’t something that’s really encouraged in the first session (which, incidentally, is usually free).

Kickboxing mixes different types of fitness work, so it is great all-round exercise. So, whilst there is a lot of aerobic movement, there are also explosive anaerobic techniques. You will need to work on your flexibility, and strength training can also be a focus. All of this means that you will get more out of kickboxing than out of a single-focus exercise like cycling; cross-training is built into it. In addition, you will also gain confidence. A lot of clubs specifically teach self-defence techniques along with the more traditional techniques of the sport – something that many people find helpful, since a lot of people take up a martial art so that they can take care of themselves better should the circumstances arise.

If you’re not sure, go along to one of the taster sessions; whatever London kickboxing club you choose, it will probably offer a couple of free lessons before you sign up properly. Wear loose clothing and take a drink. You will probably get a good impression of what London kickboxing classes involve from the first session or two. At that point, you can try another club or settle with that one if you’re happy with it. The main thing to remember, though, is to have fun. If you’re interested in trying kickboxing London is a great place to look around, and there will be plenty of people in the same position as you. You will likely make some good friends in the club you choose, as well as learn to do things you never thought possible.

Please visit http://www.karmaa.co.uk/ for further information about this topic.

http://www.karmaa.co.uk/

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Health, Martial Arts