Help on Why My New Home Theatre in a Box Sounds Bad with TV - AVS Forum
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post #1 of 6 Old 11-27-2012, 06:16 PM - Thread Starter
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Hi guys, I know my system will be considered super entry-level but for me it is an upgrade from the horrible tv sound and then a pretty bad (cheap) sound-bar

I did a search of the forum for the model and nothing came up so I hope you guys can send me in the right direction.

I got the LG BH6420P and here are the specs (below).

It actually sounds great with a blu-ray in and even sounds pretty good when playing movies off a USB, but when I go to optical in and play sound from the TV....the volume is low and the quality is not very good. Anyone able to tell me what I can do to fix this?

Quote:
Features

LG BH6420P 850W (5.1 ch) Home Theatre System (BH6420P)

• 850W (5.1ch)

• Blu-ray Disc™ Playback

• LG Smart TV with premium apps, games & more

• 3D Blu-ray Disc™ Playback

• USB Direct Recording

• External HDD Playback

Amplifier/Speaker

Total Output Power: 850W
Amplifier Configuration: 5.1CH
Front/Rear Speaker Type: 2 Towers & 2 Small Satellites
Subwoofer: 145W(Passive)

Disc Playback Capability

Blu-ray 3D: Yes
Blu-ray Disc: Yes
BD-R/RE: Yes
DVD-Video: Yes
DVD±R: Yes
DVD-RW: Yes
DVD+RW: Yes
Audio CD: Yes
CD-R/RW: Yes

Video content format

MPEG4 AVC., (H.264): Yes
MPEG2: Yes
SMPTE VC1, (VC-9): Yes
AVCHD: Yes
DivX/DivX HD: Yes
MKV: Yes

Applications

DLNA® Certified: Yes
BonusView: TBD
BD-Live™: TBD
MusicID®: TBD

Broadband

SmartTV: Yes
LG Apps: Yes

Video Capabilities

Digital/Analog Conversion: Yes
NTSC: Yes
Deep Colour: Yes
xvYCC: Yes
Composite Output: TBD
Component Output: TBD
HDMI™ Output: TBD

Audio Capabilities

LPCM: Yes
2 Channel Down Mix: TBD
Dolby® Digital: Yes
Dolby® Digital Plus: Yes
Dolby® TrueHD: Yes
DTS™: Yes
DTS-HD Master Audio™ Essential: Yes

Convenience Features

SIMPLINK™: Yes
Instant Tray Open: Yes
Quick Booting: Yes
Firmware Update: Yes
Screen Saver: Yes
Parental Lock: Yes
Quick Loading: Yes
Wireless LAN: TBD
Repeat: Yes
A-B Repeat: Yes
Speaker/Woofer Level Trim: Yes
Speaker Distant (Channel Delay): Yes
Test Tone: Yes
Mute: Yes
A/V Sync Delay: Yes
Sleep: Yes

Tuner

Audio Tuner Band: FM
Radio Tuner Presets: 50 Station

Inputs /Outputs

Digital Audio In: Yes
HDMI™ In: No
HDMI™ Out: 1 Rear
Component Video Out: No
Composite Video Out: Yes
AM/FM Antenna Inputs: FM
Ethernet (RJ-45): Yes
USB 2.0 In: 1 Front
iPod/iPhone Cradle: No
Portable Audio In: Yes

Included Accessories

Speaker Cables: 6
DLNA Set-up Disc: Yes
AM/FM Antennas: FM
Remote Control: CB1
Batteries: Yes

Dimensions (WxHxD)

Main Unit Dimensions: 360 x 61 x 297mm

Front Speaker Dimensions: 250 x 1100 x 250mm

Centre Speaker Dimensions: 88 x 300 x 64mm

Rear Speaker Dimensions: 88 x 197 x 79mm

Subwoofer Dimensions: 133 x 352 x 325mm

UPC: 772454059643
Specifications
Model Number: BH6420P
Weight: 47 pounds
Product Dimensions: 18 (l) x 17 (w) x 29 (h) inches
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post #2 of 6 Old 11-27-2012, 07:49 PM
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What did you set your tv to output sound as? 2.0 pcm? Dolby? What tv do you have? What is the input to your tv? OTA? Cable? Sat? All this plays a part, especially when you say other inputs to the HTIB part sound fine.

"I realize that somebody playing free music isn't as commercial as a hamburger stand. But is it because you can eat a hamburger and hold it in your hand and you can't do that with music? Is it too free to control?" - Don Van Vliet (aka Captain Beefheart) discussing commercial success in the music biz


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post #3 of 6 Old 11-27-2012, 08:01 PM - Thread Starter
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thanks, this is my tv LG 55LW5700 LED LCD and no I did not set anything on my tv as far as audio goes. it is hooked up to a digital Rogers cable box
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post #4 of 6 Old 11-27-2012, 08:27 PM
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Your tv manual only says to set your speaker selection to off which you've probably already done, don't see an option as to output spec (my tv has such). I don't know which digital Rogers cable box you have so can't check that, but it's probably some else's box they put their label on (at least I think Rogers is a tv cable provider, yes?), but search through the setup menu for the box for audio setup.

"I realize that somebody playing free music isn't as commercial as a hamburger stand. But is it because you can eat a hamburger and hold it in your hand and you can't do that with music? Is it too free to control?" - Don Van Vliet (aka Captain Beefheart) discussing commercial success in the music biz


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post #5 of 6 Old 01-30-2013, 05:05 AM
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There is an option in Settings under Sound about Optical out. If I remember correctly my Tv has 2 options to select from, Auto and PCM. Maybe you should try these.

By the way. Does LG BH6420P play surround sound from external sources when they are connected though optical? eg. HiDef Digital TV or HiDef movies on hard disk playing from the TV?
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post #6 of 6 Old 01-30-2013, 07:27 AM
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Quote:
Originally Posted by jayg123 View Post

Hi guys, I know my system will be considered super entry-level but for me it is an upgrade from the horrible tv sound and then a pretty bad (cheap) sound-bar

I did a search of the forum for the model and nothing came up so I hope you guys can send me in the right direction.

I got the LG BH6420P and here are the specs (below).

It actually sounds great with a blu-ray in and even sounds pretty good when playing movies off a USB, but when I go to optical in and play sound from the TV....the volume is low and the quality is not very good. Anyone able to tell me what I can do to fix this?

Dont feed optical audio "from" the TV, get it direct from the source wink.gif
Your Rogers cable box should be connected directly to your HTIB receiver for the best audio via Optical for Dolby Digital 5.1, send only video via HDMI or Component Video to your TV
There will likely be a sub menu for your Rogers box to adjust video/audio output settings if necessary.

If your currently sending audio and video to the TV from the cable box, then routing the audio back to the receiver via optical, that would explain the difference in audio levels.
The HTIB is getting audio direct from the source when using DVD, Bluray or USB, not through the TV right? So why not do the same for your cable signal?

From your manual:


(if you still need TV audio without the use of your HTIB speakers, you can likely run a pair of L&R 2.0 RCA audio jacks from your Rogers box to the TV's L&R audio inputs.)
It makes very little sense to send 5.1 audio to a TV with just two speakers.

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