Selecting a system tuner is a little different from selecting other components. When auditing other components, people are primarily concerned with their sound quality rather than their technical performance.
For example, if a preamplifier sounds good at hearing, you don't have to worry about your technical performance. Because if it sounds good, it works well.
On the other hand, tuners show great differences in their technical performance. This not only affects the sound of the tuner; tone balance, sound schedule, timbre, etc. but also features such as the ability to record poor or remote stations, refuse adjacent stations, provide a noisy audio signal, and remain stationary on the station.
The performance of the tuner in these areas can be accurately measured; thus, tuner specifications are much more significant than other audio components.
There is a direct correlation between tuner specifications and audio performance. You still have to listen to the tuner before you buy it, but you can often separate narrower models from the better units with the help of the specification sheets.
In contrast to most audio products, the best top quality tuners have more features, front panel controls and displays than lower quality products.
The mass market producer's good tuner is priced between $ 400 and $ 1,000. Some of the high-end companies in the mass market provide excellent performance.
The price range between $ 750 and $ 1,200 is very competitive and you can choose from many excellent units. The best tuners cost $ 12,000.
Differences Between Medium and High Tuners.
Good tuners are characterized by their sensitivity or the ability to pull down poor stations. The higher the sensitivity, the better it is to pick up weak or remote stations.
This aspect is more important in suburban or rural areas that are far from radio stations.
On the other hand, a tuning unit that is more important to a city dweller is adjacent channel selectivity, or the ability to record a station without interference from the station next to it.
This specification specifies the ability of the tuner to reject two channels of the strong station from the desired channel. If the stations are packed tightly together, as in the cities, the selectivity of adjacent channels and alternative channels is more important than sensitivity.
It is equally important for all listeners that the signal-to-noise ratio of the tuner, the difference between the dB and the background noise and the maximum signal strength. The tuner with a weak signal-to-noise ratio overwhelms the music with annoying background noise.
The weak tuner unit will have difficulties in receiving weak stations, or may not be able to select a station if the station is next to another station, has high background noise, and nearby FM transmitters or other radio sources will overload them.
Many tuning units have a large mixing circuit that automatically switches to the signal when the signal strength drops below a certain level.
The difference between the large blend and the mono / stereo switch as described now is that the large blend circuit only places the mono high, so that the remaining spectra remain in stereo. It gets rid of most noise, but keeps stereo separation on most of the middle and bass.
Finally, each good tuner has a 75 ohm coaxial antenna input and the most commonly used 300 ohm flat wire input. The coaxial input must be used for the best signal transmission between the antenna and the tuner.
Source by sbobet