Question about RCA RT2500 System

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Low Frequency Effect

My LFE light is flashing. I'am not getting any sound. It's just flashing left speaker right speaker.

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Re: Low Frequency Effect


Has your speakers worked in the past? Did this error come up after you played with the settings of connections?

Posted on Jan 24, 2008

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Re: Low Frequency Effect

in this case the audio is good but the output speaker is not working because you have blown fuse at the amplifier section thats why cant hear the sounds... check the amplifier section then check the fuse speaker protector.. replace a new fuses with the same rate....


Posted on Jan 24, 2008

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1 Answer

I wish to replace a subwoofer on a surround sound system

In most surround sound systems the sub woofer is powered separately and uses a standard RCA coax connection to the receiver/amplifier.

Replacing is simply plugging in the new and reconnecting the coax cable.

Usually the audio signal is Dolby Digital 5.1 the (.1) is the LFE Sub-woofer. The connection is between the Subwoofer RCA connector on the amplifier and connects to the (LFE-Line) in on the subwoofer speaker.

Hope this helps?




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Can't get bass through subwoofer of my old sony surround sound system when i connect my laptop to amp using 3.5mm jack. laptop is Samsung rv511 and sony amp doesn't have optical in or hdmi in. any ide

If I understand correctly, you have a 3.5mm plug into your Samsung laptop, which is then connected to your Sony surround system via the red/white RCA plugs. I assume for the input to the Sony you're using a standard audio-in. I would check the speaker setup settings on the Sony to ensure that the "bass" and not just LFE (low frequency effects) are being sent to the sub-woofer. My understanding is that LFE is found only on Dolby or DTS encoded soundtracks, and if the subwoofer is limited to just LFE you wouldn't be getting any bass when listening to two channel stereo from your laptop.

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I have a sony HTDDW7600, i cannot get the dedicated subwoofer amp to work. The fan is running on it, but for some reason the only way i can get it to do anything is to unplug the cable that goes from the...

You have a very good of the best of SONY..SUB does not get activated automatically especially on STEREO mode.DIRECT STEREO Notes • No sound will be output from the subwoofer.
.your system has Dedicated Power Amplifier for 2 Externally Driven Sub-Woofers (200W RMS x 2) order to activate the sub woofer amplifier you need to make a selection on the surround modes while you are switching the modes of the surround you will see the speaker position on the display of receiver as well..if you do not see the sub woofer it wont be activated..Sound Field Program (A.F.D) is a good example to test it..
Take care and please Remember to rate/vote and give me 4 Thumbs Up
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Hope this helps!

Additionally please follow the instruction on your user manual to activate the SUB ,as is follows..

Low-frequency (bass) signals can be directed to the
subwoofer and/or the front left and right speakers
according to the characteristics of your system. This
setting also determines the routing of the LFE (low-
frequency effect) signals found in Dolby Digital or DTS
Choices: SWFR (subwoofer), FRONT, BOTH
• Select SWFR if you connect a subwoofer. LFE and
low-frequency signals from other channels are directed
to the subwoofer according to the speaker settings.
• Select FRONT if you do not use a subwoofer. LFE and
low-frequency signals from other channels are directed
to the front speakers according to the speaker settings
(even if you have previously set the front speakers to
• Select BOTH if you connect a subwoofer and you want
to output low-frequency signals from front channels to
both the front speakers and subwoofer. LFE and low-
frequency signals from other channels are also directed
to the subwoofer according to the speaker settings. Use
this function to reinforce low-frequency signals using
the subwoofer when playing back sources such as CDs.

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1 Answer

Hi, I cant get my bas to work with 5.1 only with my front right and front left. what channel should i use? please help

Please rephrase. "5.1" and "only ... front right and front left" are mutually exclusive. Look at manuals.

In general, bass is 'managed' by directing it toward or away from any speaker the user declares to be LARGE or SMALL, usually based on arbitrary cone sizes instead of bass handling capability. There 'managed' bass is rerouted to the presumed capable LFE/Bass/Subwoofer channel to avoid potential damage to bass-shy speakers. Therefore, if one lacks a subwoofer one has to tell that to the receiver and designate the other speakers as LARGE or the bass will get tossed in the bit-bucket

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Subwoofer output no sound...

Check to see if it is properly hooked up to the player, and if it is, then either the amplifier's LFE(Low Frequency Emitter/Subwoofer) channel has failed, or the CPU is not beginning to forward frequencies 200Hz and below to the subwoofer. At 200Hz, the subwoofer adds to the satellite speakers, an then at 110Hz and below, only the subwoofer is playing.

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1 Answer

5.1 Dolby system does not work with the T.V.

Solution: connected the rear right and left wires to the Front , left and right wires......................and everything works the way I anticipated without any technical problems....... the woofer works on a separate circuit, so I continue to receive the "low" frequency..

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1 Answer

How to create surround effect on cds/dvds which are not recorded on surround technology on home theatre dav dz 777

There is no way to do this in a controlled manner without re-mastering the disc, an unrealistic option.

However, there is a very simple way to extract the out-of-phase portion of a stereo recording, which can yield a quasi-surround sound effect.

To get this effect, connect an additional rear speaker to the positive ( + ) connection of the right speaker output and the negative ( - ) connection of the left speaker output.

Please keep in mind that this only works with a stereophonic (not mono) source and is fairly subtle.

Make sure the speaker you use is at least 8 ohms.

This is an old trick that pre-dates surround sound and works with music CD's too.

This set-up will probably degrade the sound of a true Surround-Sound recording so consider wiring a simple switch to disconnect the additional rear speaker when not in use.

Hope this helps.


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2 Answers

No voice sound through speaker with DVD system, only music?

first check the settings on the audio menu of the dvd player. make sur it is set to 5.1 (if available) otherwise set it to stereo and your system should decode it.
assuming the second step is okay : as other dvd you play seem to work) it still may be that your unit is decoding stereo inputs just fine and 5.1 is not working properly....
so if adjusting audio settings in dvd play back menu dont work,
check that the cables to the satellite speakers are connected correctly and all plugged in soundly ( voice is high frequency,- coming from satellites - the garbled noises you hear are the base ( low freq) elements of voice which are coming from the bass box ( that the X.1 part of 5.1) and so that is obviously working. ,

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UH oh , time for a shop visit. The "finals" are shot...accordianman

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1 Answer

'stereo' speaker problems

Yer man there a load of **** i've got 2 x DV290's one for the back of my studio & one powering the front,your lucky you only had 2 **** speakers i had 4 lol.
but there is light at the end of the woofer,they have to be wired together its as if one makes the other one work,so you put GRAY & BLUE in you get BASS or hum ,you put BLACK & RED in you get HIGH or top end you put all four in you get nice mixture.
I've also had it another by mistake & it worked, i put the + & - side by side instead of top & bottom so it was RED / GRAY & BLACK / BLUE if you know what i mean.then cut the plugs off the surrounds & wired them in aswell & it's all good in de hood.
oh a tip before i go,get some rubber legs off the bottom of something or the casters off an old chair or stool & GET THEM SLAPPED BETWEEN THE AMP & THE SOUND PROCESSOR for ventilation coz Fu*"*k me they don't half get hot man!
good luck pal....later

Aug 12, 2007 | Technics SC-DV290 System

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