Panel switch wiring

Showing posts with label speakers. Show all posts

Tuesday, September 9, 2014

Overload protection for speakers

Although the protection circuit is fairly simple, it forms an effective guard against overload of the input of amplifiers and loudspeakers. Why these inputs may need protection now that line levels have been standardized is because there are signal sources on the market that generate outputs of several volts instead of the standardized 1 V r.m.s. Also, in some applications, the loudspeaker signal is applied to the line output of a separate amplifier via a voltage divider, in which case the levels may be well above 1 V r.m.s. The diagram shows a schematic that resembles the familiar series resistor and zener diode. Here, however, the zener is constructed from a small rectifier and a transistor, since commercial zeners appear to start conducting way below their rated values, which gives rise to unwanted distortion. The constructed zener makes a well-defined limitation possible and does not affect signals below the critical level. Configuring T1 as a diode reduces the number of components needed to a minimum: not even a voltage divider or potentiometer is required. Measurements on the prototype show that the input signal remains virtually undistorted at levels up to 700 mV r.m.s. At the threshold of 1 V r.m.s., the distortion is about 0.02%. Above this level, limiting is welldefined. The peak output voltage of the circuit is about 3 V with an input voltage of about 13 V r.m.s. If the limiting level is required to be slightly higher, consideration should be given to replacing T1 by three or four cascaded diodes.

Monday, August 25, 2014

Differences subwoofer and woofer speakers

In the world of electronics, especially in terms of audio must be familiar with the term speaker, be it a woofer or subwoofer. Each of these types of speakers choose a variety of characteristics and differences. Here will be explained a little about subwoofe speakers and woofer speakers, so we can find out where the fine for use as needed.

Subwoofer Speaker

Subwoofer is a bass speaker system yangg could produce a lower frequency than usual with an additional woofer low pass filter.Walaupun sub-woofer does not have to wear two opposite poles mounted speakers, a good sub-woofer is that using 2 woofers for the volume remains loud. Sub woofer with the woofer does not always have a special, because ordinary woofer can be built into the subwoofer, by adding an amplifier low pass filter. Sound system (sound system) even if only to include a sophisticated subwoofer, along with some other speakers.

And in other words, the difference in bass speaker (woofer) with speaker Sub Woofer:

By description SUB word, it means the speaker must be able to handle bass tones below.
Bass speakers can use the speakers with her without a rubber edge cones.
Speaker Sub Woofer, using cones with rubber edges, so its more flexible movement of cones.
Performance of all speakers (tweeter, Middle, woofer or sub woofer) strongly depends on the source signal and Pre Amp and Power of his amps. So if not supported by all three of these factors, it will not produce a good tone (tone control).
Regarding his Ohm, 100%, depending on its output amps.
Like the amps in the car, the output is 4 ohms, while the home is generally 8 ohm amp, but there is also a distinguished 16 ohms. So adjust the speakers to the amplifier.

So the key difference lies in the low tones (bass) are produced. Subwoofers capable of producing a low tone below the average normal woofers, and the tone is also more melodic and soft . So what can I share, may be useful to visitors all. Thank you