Sony da555es front speakers not playing

Subwoofer sockets
The HTR-420 has only a single subwoofer output. It is the socket on the lower left corner. The other subwoofer socket is part of the multi-channel input.

Because of the age of the 420, it comes from a time when optical and coax connections were not so common and DVD players had 6x phono/RCA sockets to send out the surround signal in analogue format. The multichannel input is for sending a signal in to the amp, and not for getting a signal out. That's why the sub doesn't get a signal from that socket. Use the proper subwoofer out. That's what it is there for.

Speakers A+B
The 420 was designed to run Speakers A+B together if required. However, you must observe the minimum impedance loading if you connect up two sets of front speakers and run them simultaneously.

The minimum Impedance for each set of front speakers is 8 Ohms. If you're recycling old surround speakers from a Home-Theater-in-a-Box system, or the speakers have no labels for impedance on the backs then you can be fairly sure they are not 8 Ohm. That could be the problem.

Are both connected to the same amp?

More info here - http://sparky3489.webs.com/

In two channel mode, there will be no subwoofer signal unless you change the front speakers to 'small'. If you set the front speakers as 'large' then the full frequency spectrum will be sent to the front speakers, and none to the sub. Switching from bluray may keep the surround configuration until you restart as you mentioned.

H?,
You have a very good system...one 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)..in 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
for Helping out the Community :)
Hope this helps!
--------------------
Additionally please follow the instruction on your user manual to activate the SUB ,as is follows..
-----------------
BASS-OUT
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
sources.
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
SML).
• 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.

You have not mentioned what equipment you would like to connect to this active subwoofer.
Assuming you have an AV Receiver, you will require a single long RCA to RCA subwoofer cable. Connect the left input (white socket ) of the subwoofer to the AV Receiver subwoofer pre output.
Leave the front crossover knob at 100Hz , Phase at 0. While playing an audio track slowly increase the subwoofer front volume to suit your taste. If you are using big floor standing speakers along with the subwoofer reduce the crossover frequency to 70Hz. Phase should be adjusted to blend the front speakers with the sub.

Are you using the Creative speaker test program? It usually has a picture of a generic layout of a pc system, with the speakers around it, showing a speaker for each that you should have plugged in. There should be a test button that will play a sound through each speaker. If a sound plays from your center speaker when the subwoofer picture is lit up then you may have a cord plugged in incorrectly on either the subwoofer or on the back of the soundcard. I've ran into this many times.
The best way to set up surround sound is to get your speakers placed or mounted on the wall, then run one wire at a time into the subwoofer, to ensure that the front left is hooked into the subwoofer in the front left, front right into front right, etc. Then once the speakers are hooked into the subwoofer start running the outputs from the subwooofer one at a time into the sound card. After each connection run the test program and watch the pictures light up as the sound plays, and make sure that the speaker playing sound in your place is the same speaker that is lit up on the test program.
I hope that helps, otherwise the amp is probably bad. Let me know if you need more help.

There is a possibility that you may be overpowering or under-powering your speakers with the amp you are currently using or are playing notes below the specified range of "Hz" of the subwoofer causing the sub to sound distorted or as you would call it "chattering".
If the speakers range is 130hz-45hz and your playing notes at 30hz and dont have it tuned at the crossover either on the amp or the stereo to suit the subwoofer, the speaker will try and play the note regardless and will cause the cones to move beyond its range and may cause it to slap the magnet which can damage the subwoofer if consistently played that way. Please let me know if this solved your problem..

I have a Sony 46" LCD TV. I have a Direct TV HD converter box, a Sony Blu-Ray BDP-S360 Blu-Ray player, and a Pioneer DVD-Audio player connected to my Pioneer Elite Home Theater receiver. I have my Pioneer DVD-A player connected via Fiber-Optic cable. When i play a DVD or a DVD-A on my Pioneer DVD-A player, all of my speakers work fine, but when i play a dvd on my blu-ray player, all the speakers work except my subwoofer. How can I fix this problem?

There should be an adjustment in setup that for 2 channel sources, you may have to enable the subwoofer output. Or alternatively, if the subwoofer output for 2 channel sources is in fact enabled, then increase the crossover frequency for the sub.

firt you clean the subwoofer with cleaner after that, check the subwoofer srrounding, no electrical wire ,mobile phone & electrical operated items is near ur subwoofer.
1. Do not use maximum volume of subwoofer.
2. Use only 65-85% volume of your sub woofer.