Has a high tone sound (about 3KHz) from speaker after power on. The sound level decrease and become to disappear after half an hour warn up.The problem occured at both TV and AV modes. At AV mode, it
N3735W has a high tone sound (about 3KHz) from speaker after power on. The sound level decrease and become to disappear after half an hour warn up.The problem occured at both TV and AV modes. At AV mode, it occured although I disconnect the audio input, it disappear when I disconnect the video input. Why?
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Speaker requirements are likely to be 8 ohm, most modern hi-fi speakers are. A few low-fi systems have used special high impedance speakers and the old hi-fi standard for valve amplifiers was 15 ohm and 3 ohm or lower has been used in televisions a lot.
4 ohm speakers are commonly used where a higher power output is desired at the cost of some quality of sound reproduction but depending on how the sound is listened to can soon overload some amplifiers primarily designed for 8 ohm as it will try and deliver more power into the lower impedance speakers and perhaps exceed the rating.
8 ohms is a safer choice. The lower the wattage rating of the speakers the more efficiently they tend to be able to reproduce sound at low volume levels so for background music in a small domestic environment the average power requirement will be in the order of half a watt so even with a high powered amplifier the volume would rarely be turned up above 1 - 2 on the typical scale of 10 and ten watt speakers would be more than adequate. It is unfortunate that it is almost impossible to obtain quality speakers rated at such an unfashionably low power rating.
With the stiffer cones of a higher power rated speakers the volume has to be turned higher before the speakers become efficient and listening at low levels can be difficult. In a domestic environment a 50 watt rating is perhaps the best compromise as if there are neighbours to consider a ten watt average power output will be sufficient even if the amplifier is capable of higher powers. Just don't turn the volume up more than necessary.
The greater the power rating the more power will be required for efficient reproduction. For electrical and mechanical safety of the speakers the rating should exceed the maximum output of the amplifier but listening at low levels with quality of sound can become virtually impossible.
There are different ways to adjust the ringer and speaker volume on your handset. Please see your owners manual for model specific instructions. On most single handset units: Ringer volume: Press the volume up or down arrow rapidly to change the ringer volume. Speaker volume: When talking on the handset press the volume up and down arrow to increase or decrease the volume. On other models: Ringer volume In standby mode, press the volume up key or volume down key on the handset or base to select one of three ringer volume (Off, Low, or High).
Earpiece and Speaker Volume You can select from among of six volume levels on the handset, and ten levels on the base. Pressing the volume up key or volume down key on the handset or base during a call will change the earpiece or speaker volume. This setting will remain in effect after the telephone call has ended. If you press the volume up key when the earpiece is at the maximum volume level, an error tone sounds. The error tone also sounds if you press the volume down key at the lowest volume. Sergio
Very common problem with today's receivers. Receivers made today don't have a true preamp section in the amplifier and do not amplify the sound to the extent of an older receiver. I have large 15" front speakers on my system, and have stuck with my 15 year old receiver just because I know that a new receiver will not have the power to drive them well. Many of the newer receivers need to be turned up to 50-60% before you can even hear anything from the speakers.
What you're looking for is called a "crossover". A crossover is an electronic filter for an audio or speaker circuit. In an audio circuit, a crossover is used to prevent or pass certain frequencies or a range of frequencies from passing through it. Since your sub will reproduce the bass or low frequencies, you don't want other speakers to reproduce them. A band pass filter on your door speakers will do this for you. A band pass filter passes only a range or "band" of frequencies and blocks those that are above and below the range or band of frequencies selected. Installing a band pass filter will prevent the very high & very low frequencies from getting to the door /dash speakers. Likewise, you should consider connecting a low pass filter to your subs, too. The low pass filters work a little differently from of the way band pass filters work - they only allow low frequencies to get to the sub - blocking all the other higher frequencies (your other speakers are better suited to reproduce those). Lastly, you would install a high pass filters on tweeters. Tweeters are designed to reproduce only the high frequencies - sending mid and low frequencies to them is wasting power and can cause damage to them.
You purchase the filters for specific crossover points (the block / unblocked point) as determined by the individual speakers. If a sub has a frequency response of 20Hz - 100Hz, a low pass filter of 100Hz would be ideal. Remaining filters would need to begin at 100Hz - assuming the mid-range speakers have a frequency response beginning at 100Hz. A band pass filter of 100Hz - 3KHz would fit the bill nicely if the mid-range speakers go up to 3Khz Match the high end of the band pass to the high end of the frequency response of the mid-range speakers. Next, a high pass filter at 3KHz would allow only the high frequencies to your tweeters. Basically, you want to have the entire audible range 20Hz - 20KHz covered by the speakers and have the crossover points that match the frequency response ranges of the speakers.
The volume setting on the speakers has LITTLE to do with how hard you are driving them. Your source might be extra hot and overdriving them. Read the specs on the speakers and use a sound meter to check your level. The speakers, being only 12 inch, should fill a room 20 foot by 20 foot to about 95 to 100 Db which you are only allowed 2 hours in MAX to prevent hearing loss. At 6 hours you should keep it down to 85 Db SPL. I know several deaf musicians that were exposed to high sound levels in rock bands... a deaf musician is kind of washed up.
Clipping occurs when an amplifier is pushed to create a signal with more power than its power supply can produce. The red light flashing is warning you that your are overdriving the amplifier located in your speaker cabinets. This can cause damage to your amplifier and or your speakers. You should not allow the volume level to exceed clipping. For more information on clipping CLICK HERE Take Care!
If you are not getting sound from any of the 4 channels, I'd suspect that either the amp is not getting an input signal or the amp itself is faulty.
Here's the "no sound" troubleshooting step-by-step procedure from the JL manual:
1) Check the input signal using an AC voltmeter to measure the voltage from the source unit while an appropriate test tone is played through the source unit (disconnect the input cables from the amplifier prior to this test). The frequency used should be in the range that is to be amplified by the amplifier (example; 50 Hz for a sub bass application or 1 kHz for a full range / high-pass application). A steady, sufficient voltage (between 200mV and 5.O-volts) should be present at the output of the signal cables.
2) Check the output of the amplifier. Using the procedure explained in the previous check item (after plugging the input cables back into the amplifier) test for output at the speaker outputs of the amplifier. Unless you enjoy test tones at high levels, it is a good idea to remove the Speaker Connector Plugs from the amplifier while doing this. Turn the volume up approximately half way. 5V or more should be measured at the speaker outputs. This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume. If you are reading sufficient voltage, check your speaker connections as explained below.
3) Check to ensure that the speaker wires are making a good connection with the metal inside the Speaker Connector Plugs. The speaker wire connectors are designed to accept up to 12 AWG wire. Make sure to strip the wire to allow for a sufficient connection with the metal inside each terminal.
The on-screen menu appears only when the selected source
is DVD or VCD on the DVD/VCD/CD player and the disc
is in the slot and NOT PLAYING.
On the remote control ONLY:
1. Press CHOICE (it should work now)
LANGUAGE menu appears.
2 Press Cursor to move to the
menu you want? which is AUDIO
Selected item changes its color to green.
1. Display EXPERT SPEAKER SETTING menu.
2. Press Cursor to select ?TEST TONE,?
then press ENTER.
?TEST TONE? changes its color to green and test tone
comes out of in the following sequence?left front speaker,
center speaker, right front speaker, right rear speaker, and
left rear speaker.
? Test tone is output only when the tray loaded with a DVD is
selected, but not playing.
3. Press Cursor to move to ?C.SPK?
LEVEL? or ?R.SPK?LEVEL,? then press ENTER.
4. Press Cursor to adjust the output level, then
? You can adjust the output level from ??6 dB? to ?+6 dB.?
5. Repeat steps 3 and 4 to adjust the other speaker output
6. Press Cursor to select ?TEST TONE,?
then press ENTER.
Test tone stops.
7. When finished, press Cursor to move
to ?EXIT,? then press ENTER.
EXPERT SPEAKER SETTING menu disappears.
I hope this helps you, please let us know.