User manual SMART DEVICES EX510

[. . . ] Specialized Polarity pulses are provided on a test CD that accompanies this device. The recorded pulses and the hand-held detector feature a unique method of self-authentication whereby the system actually checks itself to insure proper readings. No other polarity checker has this feature. This means that the Polarity Checker is highly accurate, extremely reliable and very suitable for hobbyists, audiophiles, car audio dealers, home audio listeners, studio and recording system engineers, and pro-audio contractors Background: When more than one speaker is used in a system, it is important that the direction of cone movement of each and every speaker be the same. [. . . ] When the flat surface moves towards the microphone, we call it a positive direction of travel. Try this experiment again and notice that each time you tap the book toward the microphone the green LED lights, indicating that the Polarity Checker received a positive pulse from the book. Now, tap the book away from the microphone, notice that the red LED lights each time the book is tapped away from the Polarity Checker's microphone. When the book moves away from the Polarity Checker's microphone, we call it a negative direction of travel. Repeat the experiment and notice that each time the book is tapped away from the microphone, the red LED lights, indicating that the Polarity Checker received a negative pulse from the book. Move the book out farther away from the Polarity Checker and repeat the experiment. Notice that as you get four or more feet away, the LEDs no longer light. This means that the sound energy is insufficient to measure polarity. Although you can slam the book harder to force the LEDs to light, reflections from the floor, walls, tables and your body will begin to affect the measurements. It is best to keep the microphone very close to the flat object and/or the speaker's cone. Set the Polarity Checker down or the table and sing into the microphone until the LEDs stop blinking. Summary: Insuring at least relative system polarity is one of the mat basic of audio tests. However, it has been our experience that such a simple test is often overlooked. Old methods utilized pulse generators, microphones, and oscilloscopes. The Polarity Checking system makes it possible to quickly and accurately get your system into absolute polarity - from the software to the listening environment. CD Reference Material with most commonly Used CD Tracks: 1 Polarity Pulses These pulses are wide enough in duration to enable them to be used with most makes of polarity checking devices. The pulses have been sequenced so as to eliminate invalid readings. A single negative pulse follows each group of two positive pulses. The sequence is repeated for five minutes. The third pulse in each group must show opposite polarity in order for the reading to be considered valid. 2 20Hz to 20KHz Slow Sweep This track contains a very flat low distortion 20-20kHz sweep for testing the frequency response of electronic components. It is not intended for acoustical evaluations where reflections or standing waves may cause interference. [. . . ] Then notice the vertical lift in the entire sound as the horns come in over the keys. Can you bear the tambourine (panned far left) from :29 to :42?See if your system does a good job of property staging the trumpets (predominantly in the left channel, e. g. 1:13), with the "fat" lower sound of the trombone on the right (reference the trombone solo at 1:29) 25 "Dance Of The Knights- from Prokofiev's Romeo & Juliet THE LIENSDORF SESSIONS, VOL. [. . . ]