Sideband power is very low & when you turn up the dynamike from the min position it gets distorted. AM is ok. This is the china made model from 2 years ago. What is the problem & how do I fix it.?

they dont last forever... time for replacement as most are not user-serviceable..

Guitar amps have preamp sections (think unpowered audio mixer) and power amp sections (Crown rack-mount amp). An excellent way to isolate audio problems if amp is still producing audio is to check the preamp out (line out). Preamp output distorted = preamp failure. Connect MP3 player to "Power Amp In"...sound distorted = power amp failure. In your case the latter is the case as your "line out" is clean. Also test each speaker for clear sound as speaker cone damage from being overpowered is fairly common. At 300w. I'll assume the failure was not from cranking the volume to loud but a shorted speaker or speaker wiring could zap the power amp in an instant.

yes, but you would not get the same performance as you would if you gave them the suggested power. I have found that it is always better to use a more powerful amp than your subs are rated for (as long as it is clean, high quality, low distortion power). I have had the best luck with name brand amps (kicker,rockford fosgate,phoenix gold,etc...). I hope this will be helpful to you.

Dynamike Gain Control varies the microphone sensitivity. When set fully clockwise, it is very sensitive - and will be able to "hear" background noises easily. This position also can cause your voice to be distorted or garbled when approaching maximum under the right conditions as well as causing "bleed over" to adjacent channels. When set to minimum, you will need to speak clearly and directly into the microphone to be heard. Most people find a setting somewhere in the middle works best.

You should adjust the level to suit those that are listening to you by asking them if it sounds OK. This prevents them from having to turn their volume down whenever you speak. In a "one-to-one" conversation it is not as noticeable. The trouble comes when 3 or more are conversing. The third person's audio may be low or normal - and the listeners set their radio's volume so that they can hear that person easily. Then you transmit with booming mic audio and everyone scrambles to turn down the volume to save their ears / speakers. This can be very frustrating for the others having to constantly adjust the radio volume whenever you speak.

I hope this helps and good luck. Please rate my reply - thanks.

When setting your gain you want to set the gain high usually between 75% to 95%. if the gain is low than turning up the volume on your radio will only amplify the distortion coming from the under powered head unit. By turning up the gain you are maximizing the signal that is amplified coming from your head unit

turn down the mic gain until its not distorted any more.

Also, If this radio has been peaked and tuned, some one may have clipped d10 with is the modulation limiting diode. When you clip it, it disables it. This may have been done instead of just turning VR4 all the way down, which turns the modulation up, but still limits it by a hair. A lot of the time clipping d10 is fine and doesn't get you sputtering, but if it does you need to connect it and just turn VR4 all the way down.

Most likely you have they dynamike to high. About 1 or 2 o'clock should do it.

Also if you are using a power mic, that is too high.

A lot of times it's the mic its self and not the Gain that makes you loud.

If you want to be loud, get your self a skythumper noise canceling mic. And put your mic gain around 1 or 2 o'clock.

Check following things:

1. The master volume control on the SR16 is at least half way up. Turn down the amp as needed. Running very low output of the SR16 and high amp gain is sure to get distortion.

2. Check power adapter is the original and is producing correct voltage.

3. Check that audio cable is high quality instrument cable and not consumer or speaker cable.

Well... It consumes 240 watts of electrical power total so take the audio power specifications with a huge grain of salt, as no audio device puts out in audio power anywhere near what it consumes in electrical power. Heat produced is power consumed, too and nothing is 100% efficient.

In the specs below the only information useful for comparison is in the line I highlighted with >>> <<<<'s as it conforms the closest to the industry standard practice of using:

"X watts into 8 ohms (standard load) from 20 - 20000 hz plus or minus Y db at no more than .0Z% distortion"

The better amps specify vanishingly low distortion specs (0.0x% vs 0.x%) at the cost of being able to claim higher wattage. But they guarantee cleaner sound at the claimed levels.

JVC is being tricky with their choice of a 40 hz lower limit. THAT is the power hungry end of the spectrum. 20 hz is normally the lower limit stated.

"Output Power .............At Stereo operation
Front channels .............55 watts per channel, min. RMS, driven into 4 ohms at 1 kHz, with no more than 0.9 % total harmonic distortion. (IEC268-3/DIN) 30 watts per channel, min. RMS, driven into 8 ohms at 1 kHz, with no more than 0.9 % total harmonic distortion. (IEC268-3/DIN)

>>>>> 30 watts per channel, min. RMS, driven into 8 ohms, 40 Hz to 20 kHz, with no more than 0.8 % total harmonic distortion. <<<<<

At Surround operation
Front channels .............50 watts per channel, min. RMS, driven into 8 ohms at 1 kHz, with no more than 0.8 % total harmonic distortion.

Center channel .............50 watts, min. RMS, driven into 8 ohms at 1 kHz, with no more than 0.8 % total harmonic distortion.

Rear channel .................50 watts, min. RMS, driven into 8 ohms at 1kHz, with no more than 0.8 % total harmonic distortion."

Hello packs6,

The lpf-off-hpf switches control the "low pass" and "high pass" filters. When driving full-range or component speakers the filters are usually operated in the "off" position to send all frequencies to the speakers. When driving a subwoofer, the best position is "lpf". If you have a separate amp to power a subwoofer, this amp can be used just for the high frequencies by putting the switches in "hpf".

Input levels should be adjusted to match your receiver output. You don't want the levels so high that distortion results. But you want it high enough for the amp to be able to produce maximum output. Start at about midrange and adjust the receiver volume to a little higher than a comfortable listening level. Adjust the amp gain (level) counterclockwise until you begin to hear the speakers distort. The turn the control slightly clockwise until the distortion disappears. That's the best setting.

Hope this helps.

Hello e_cody_e,

The settings you have will not break anything and may sound OK.

But they may not be optimum for getting the best bass from your system. The SubSonic setting filters out frequencies below the threshold of hearing allowing the amp to put more power into the frequencies that can be heard. So, it should be set to about the same frequency that your enclosure is tuned for or just a little lower. If your enclosure is tuned for 35Hz, then the subsonic should be close to maximum.

Similarily, the low pass sends all frequencies below the setting to the subs, (other than those blocked by the subsonic filter) and is commonly referred to as the "crossover" frequency. Typical crossover frequencies for subwoofers are 60Hz, 80Hz and 100Hz. For a ported enclosure, lower is probably better.

The phase shift should be set to the position that best synchronizes the bass with the music. Because of the additional wiring required for the subs, the signal to them is sometimes slightly delayed causing the bass to be "out-of-sync" with the rest of the music. The thump of the bass comes just a little sooner or later than expected. If the bass sounds out of phase, turn the phase shift on, otherwise leave it off.

The "gain" or level control allows you to match the amps input to your head units subwoofer output. The best setting is usually as high as possible without distortion. Set it by turning up the head unit volume to about 3/4 maximum and then advance the amp gain until your subs just begin to distort. Then back it off slightly.

These settings should allow your amp to put the most power into the frequencies that your subwoofers are designed for and hence produce the loudest and lowest bass.

Hope this helps.