Do you know the basics of home theater power amplifiers?

                     Do you know the basics of home theater power amplifiers?

In the home theater system, the AV power amplifier is the core hub, and it can be said that the function is the most complicated. Friends who are just getting started are often confused when they get it. Today, the old snail will take the most common Japanese power amplifier as an example to talk about family A few common sense of cinema power amplifier, I hope it will be helpful to you. Of course, there is no need for old drivers to read it.

1. How to connect the AV power amplifier to the computer? Connected to the player but no signal?

For friends who are new to home theater, the pile of ports on the rear of the AV power amplifier is really confusing, and they don’t know how to connect them. For example, there are Blu-ray disc players, hard drives, set-top boxes, game consoles, and computers at home. Which interface is it plugged into?

Extended reading: "Home Theater Wiring and Wiring Special Raiders"

In fact, it is very simple, you just need to think of the AV power amplifier as a switcher, similar to a mixer for stage sound reinforcement, or a micro HDMI switcher for home use, choose an input interface at will (note that there is a name next to each interface), Then switch to the corresponding channel on the remote control.

If the signal source supports the HDMI interface, it is recommended to use it first, with large bandwidth and fast speed.

2. How to distinguish the input and output interfaces?

In addition to the lack of the concept of channels, there are often small partners who make mistakes in the input, output and output interfaces, making a lot of jokes.

In fact, it is easy to distinguish. The shaded area (or dotted area) is the output interface, and the wireframe area is the input interface.

In fact, there is a text label next to the interface, the area with the word "IN" is the input; the area with the word "OUT" is the output interface. Other interfaces are basically marked in this way.

Those who can't figure out this problem are basically friends who don't like to read the manual, and are not careful enough to observe...

3. The picture is normal, but the sound comes out of the projector, what's the matter?

Restore factory settings and run Odyssey again. If the fault persists, contact the after-sales service for testing.

This is very likely that the HDMI decoder board is burned, which is a very common failure. If it is out of warranty, the maintenance fee will be very painful (manufacturers usually replace the entire circuit board directly after sales).

The old snail here would like to remind you again that although the HDMI interface claims to support hot swapping (the hard disk also supports hot swapping, do you dare to do this?), it is still not recommended that you do this, and the power amplifier may be burned out if you are not careful. .

Of course, this also depends on luck. Some people may not be damaged after hot-swapping for a lifetime...

4. There is no sound in the home theater, the volume keys do not respond, and what’s wrong with turning it off?

This is also a very common problem. For the solution, just read the post: "The home theater has no sound, the volume buttons don't respond, and why can't it be turned off?" "

The old snail wants to emphasize here that after turning off zone2 and zone3, you have to press the main button on the remote control of the AV amplifier to switch to the main zone control, otherwise it will enter the endless loop of zone2 after restarting...

Finally, I still appeal to all AV power amplifier manufacturers to remove this damned weird function that 99% of users will never use in eight lifetimes.

5. What should I do if the surround sound is low and the human voice cannot be heard clearly?

What should I do if the surround sound is not obvious or the vocal dialogue is weak? It is very likely that the sound pressure of each channel is inconsistent. The solution is very simple, just do some level correction: "What should I do if the surround sound of the home theater is small?" Power Amplifier Debugging Small Classroom》

6. Keep the test microphone well and the packing box well!

Because most of them are a small white box embedded in the white shock-absorbing foam of the packing box, many noobs don’t even notice the existence of a test microphone, and don’t know how to use it: "Tianlong, Marantz Home Theater Amplifier Automatic How to use the debugging function of Odyssey? ".

Of course, most European and American amplifiers use the Dirac Live calibration system, which has similar functions. In the absence of professional and experienced audio-visual engineers to debug, it is much better to use the automatic calibration system that comes with the power amplifier than not to debug. , must be used.

In addition, if the equipment is upgraded or the room environment changes, it needs to be recalibrated, so this test microphone must be kept well.

There is also the packing box of the power amplifier, it is recommended to keep it well. Because the AV power amplifier is an electronic product with rich functions and complex circuits, the failure rate is relatively high. Once there is a problem and it needs to be sent to the after-sales service, without the original packaging, it is easy to be bumped and damaged during transportation. Some brands will also paste the warranty card on the packing box, which also needs to be kept well.