Fabricate to check speakers special sampler. To do this, take an ordinary pocket lamp based on incandescent bulbs. Remove the switch and instead connect the two probes. They have to be isolated pens, as in the time of the off voltage at the terminals of the head there is a voltage of self-induction. Check the polarity of the voltage across the probes with a test voltmeter. Coat them with the appropriate designation. Make sure that if the probes are close, the light bulb glows.
Turn off the amplifier and all stereocomplex (including and from the socket). Disconnect both output drivers from other circuits to the speaker. Connect the probes to the terminals head without touching neither the last nor the metal parts of the probes. At this point, look carefully at the diffuser. If it moves outwards, and when you disable the interior, the polarity is correct. If the reverse is the case, change the polarity connection of the test leads, then repeat the test. Then mark on the frame the dynamic head of a black permanent marker polaritycorresponding to the polarity of the probes.
Carry out the same operation in relation to the other speakers within one speaker system. Regardless of how they are connected (directly or through crossover), connect them in-phase so that the red terminal on the rear of the column was consistent with the positive findings of the heads.
Also check and, if necessary, readjust the second speaker system. Closing the housing of both speakers, check that they are connected to the amplifier. On the cable, which is such a compound, there are special red labels. In all cases the conductor labeled connect to red terminal, and conductor no label - black.
Turn on stereocomplex. Compare its sound to that which occurred prior to alteration.
Advice 2 : How to determine polarity of the speakers
That is why, to mark the polarity on the speaker stereo? Because it is applied alternating voltage. However, if the acoustic heads are several, to enable them have in-phase. On the findings of a particular head indicate the value of polarity, in which the diffuser is moved in the forward direction.
You will need
- - a flashlight with an incandescent lamp;
- - test leads with insulated handles;
- - permanent marker;
- - voltmeter.
To determine the polarity of dynamics, make the device-probe. Take a regular flashlight with incandescent bulb. Disconnect switch, which will need to connect two probes. Leads must be with insulated handles, because when the voltage is switched off, on the findings of the head appears a voltage of self-induction.
With a test voltmeter to check the polarity on the probes, then the probes apply to the appropriate designation. When the probes are pulled, the light should illuminate.
Disconnect the amplifier and the speaker system, unplug the power cord from the outlet. Then disconnect from the other circuits of the system insights to the dynamic head. Next, connect both probes to the terminals head, avoiding the touch of the conclusions and metal parts of the probes themselves. And diffuser look carefully. If it moves when connecting outside and inside – when you turn off, then the polarity is correct. If the picture is reversed, reverse the polarity of the probes, and then repeat the process.
On the frame heads indicate the polarity, preferably with an indelible marker, which corresponds to the polarity of the probes.
Repeat the same operations for the rest of the speaker system. And no matter via the crossover they are connected or directly, you should connect them in-phase so that the positive findings of the head were consistent with contact of red color on the rear of the actual column.
Check and readjust, if necessary, a second acoustic system. Check by closing the housing of two columns, whether they were connected to the amplifier. For performing such a connection cable, you may notice red marks. In any case, the conductor labeled should be connected to the terminal marked red and the one with no label – to terminal black.
Turn on the stereo and compare the sound that it makes now, with the sound that it made before your intervention.