Yes，

UD951B isn't an amp. It can't be used as an amp. Small Speakers can be use directly, And high-power Speakers needs to connect with an amp to drive.

In some cases, if you find that your speaker is a high-power speaker, but there is no sound when playing, this may be the lack of a power amplifier. You need to add another power amplifier.

For the "analog output is only 2CH" in the software interface, you can ignore it. Because the settings there have no affecting for the final playback effect.You don't need to worry about whether there is only 2CH analog output option on the driver interface.
 

The H951BT PC-USB input is based on CM108 chip, which has powerful functions, including 2CH analog output and S/PDIF digital output, even mixing effect, etc., All of these will be displayed on the interface.
 

But the H951BT only uses its S / PDIF Digital Output function, output to another more professional AC3 / DTS 5.1 decoding chip by S / PDIF Digital, decode it into 5.1 analog output. The CM108 The 2.0 analog function of the chip is not used in our products, even if the chip with 2.0 analog output. So we just need Select S / PDIF output, others we can ignore.

If you want to use the arc output function, You can connect the HDMI (ARC) port on your TV with the HDMI (ARC) out port of the UD951B, and then set your TV to play on the external speakers, or turn on the arc function. At this time, there will be no sound from your TV speakers, and the sound will be output from the arc. And your TV box connects directly to your TV via another HDMI cable. UD951B switches to arc input mode. The LCD will display "ARC".
 

You also can connect your TV box with the HDMI 1(or 2 3) of the H951BT, then connect the TV via the HDMI (ARC) out port of the h951bt, and connect the power amplifier and speakers via 5.1CH or COX/OPT. In this way, you can play video and sound at the same time.


Please refer to the following two modes for connection:





 

For the "analog output is only 2CH" in the software interface, you can ignore it. Because the settings there have no affecting for the final playback effect. You don't need to worry about whether there is only 2CH analog output option on the driver interface.
 

The H951BT PC-USB input is based on CM108 chip, which has powerful functions, including 2CH analog output and S/PDIF digital output, even mixing effect, etc., All of these will be displayed on the interface.
 

But the H951BT only uses its S / PDIF Digital Output function, output to another more professional AC3 / DTS 5.1 decoding chip by S / PDIF Digital, decode it into 5.1 analog output. The CM108 The 2.0 analog function of the chip is not used in our products, even if the chip with 2.0 analog output. So we just need Select S / PDIF output, others we can ignore.

If you have this situation, please confirm the following items one by one:

1. All devices have been powered and started normally.

2. The connection of all devices is correct and there is no wrong connection.

3. The decoder switches to the corresponding signal channel. If you are connecting HDMI 1 or 2 or 3, the decoder signal channel should be switched to the corresponding HDMI 1 or 2 or 3, and it is same for other signal channels. The current signal channel will be displayed on the LCD screen of the UD951B decoder.

4. The volume of all devices is adjusted to the normal range (not in the mute state and the mute key is not pressed ).

5. The audio input / output settings of all devices are correct.

Because devices each customer used and usage mode maybe is different, we can't give you a standard solution. If you have any problems, you can get more information by reading the user's manual of your device, or contact us, and we will try our best to help and solve your problems.
 

NOTE:

*This isn't an amp. It can't be used as an amp. Small Speakers can be use directly, And high-power Speakers needs to connect with an amp to drive.

*The computer need be installed the driver of the system before using the H951BT unit. At present, only windows system is supported.

The driver can be got in the USB flash disk attached with the product or online from our website (please click "download" to find the corresponding " H951BT " driver to download.

Yes.

When you connect to the UD951B decoder and the sound of the TV or TV box is set to source code output (raw data / passthrough / bitstream), By now the audio signal will be decoded and output by the H951BT decoder, instead of audio decoding by TV or TV box. Therefore, the original TV ( or remote control ) / TV box ( or remote control ) is going to can no longer control the volume.

All is almost the case when you use an external / stand-alone decoder, Which you can no longer control the volume through the original TV ( or remote control ) / TV box ( or remote control ).

If you really want to control the volume by the original TV ( or remote control ) / TV box ( or remote control ), you can set the TV (or TV box) sound to the" PCM " output, so that the volume can still be controlled by the original TV ( or remote control ) / TV box ( or remote control ).

But the " PCM " output is only virtual 5.1.