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Re: what is the long volume/bass control"s proper name.
The Control you are talking about is an External Bass Control also known as EBC knob you can probably find one at MTX.com or crutchfield.com or any authorized MTX dealer. Please vote and leave high marks. Thank you
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The speaker may have a current sensing device to avoid damage under high volume conditions. Also check the setting of your bass control. Every 3 db increase in setting doubles the power going to the driver and it is easy to over drive the unit at high volumes if your bass control is not on flat.
If you have over driven the amp by playing it real loud with the bass control turned up, it is very possible that you have toasted the output stages of amp.
Every time you boost a tone control by 3 db you have doubled the output power at that frequency. So if you are "coasting" along at a nominal 75 watts, the moment you boost the bass by 3 db the amp has to put out 150 watts at that low frequency.. Go to +6db and now the poor amp has to kick out 300 watts! And so on.
Rule of thumb - you never use your tone controls at very loud levels. Tone controls are there to compensate for the poor frequency response of the human ear at low volume levels - the Fletcher Munsen effect. At low volumes our hearing with the lows and high frequencies so when you play something at low volume you boost up the bass and treble to compensate for poor hearing. At loud volumes our ears respond properly.
1. Turn the main and monitor volumes all the way down (off). Plug a cd player into channel 9/10 and play a track of music of your liking. With the main/monitor volumes still off, adjust the gain on 9/10 until the clip light turns on, then back it down until the clip light just turns off. Put the channel volume at 12 o' clock.
2. With the music still playing, turn up the mains to the desired listening level first, and then adjust the graphic eq until the music sounds good in the room. Remember or mark the position of the volume control. Do not use the channel eq on 9/10 for music that has been mastered properly, leave the eq flat. Once this step is completed then you have now set the main eq.
3. Repeat the same for monitors. Turn off the main volume and then bring up the monitor main volume to the desired level first, then set eq. Now your monitor eq is set properly. Remember or mark the position of the monitor volume.
4. Set up microphone - plug a mic into channel 1 with volume all the way down. Speak or sing into the microphone and adjust the GAIN until you see the clip light, then back down a litttle on the gain. Put the monitor and main volumes back up to the mark from step 2. Now adjust the volume and monitor send on the mic channel to the desired loudness first before adjusting the mic channel eq. Use subtractive eq method to minimize distortion and feedback. ...i.e. if the mic is bassy then turn down the lows, do not ADD highs. If the mic needs bass, turn down the highs.
I recommend checking music stores in your area for that, it doesn't have to be any specific rating of impedence. Depending on brand, I see guitars with anything from 50 ohms to 250 ohms. This only allows a faster cutoff on volume than others. The most critical action is to have a smooth taper, meaning a straight volume rise or decline versus one that goes down slowly or quickly and suddenly cuts off. Most any guitar volume control from a music store will work just fine. In case I confused you, ohms is the rating of the control, the taper or smoothness is classed as A, B, or C. A is normally for volume controls and B is used mostly for tone controls. Knowing that should give you insight insight to the difference of the controls.
two of the controls are volume, two are tone, (at least usually). the best way to use the controls is to try one at a time till you find the combination that pleases you most. I have been playing bass for 40 years and have 7 bass guitars, two with active pickups and two that acoustic electric
The level control controls the input level coming from your head unit (receiver) to the amp.
Your Sony users manual is a little vague on how to best adjust the level and other controls.
Here is one method that some installers use and works well with most amps.
Most 10" subs sound best between about 80-100hz and below, so start out by setting the LPF at about 80hz. The HPF will not be used. Next turn the bass boost and gain all the way down. Turn on the radio and set all tone controls, bass, midrange, treble to flat, usually "0" on most head units. Turn the volume up to approximately 3/4 volume level or just until you begin to hear distortion. Now, back the volume down until the distortion is gone. Next turn up the gain control on the amp until you hear the subs start to distort then back the gain down until the distortion disappears. Next turn the bass boost up again until the subs begin to distort, then either back the bass boost down or back the gain down until the distortion is gone. You may need to play around with the bass boost and gain controls to get exactly the sound you prefer.
The Bose engineers in their "infinite" wisdom developed a $300 radio with no, that is NO, tone control. This means the only way to tune bass response is to reposition the Wave radio itself. If you put it in a corner of a room, it will produce the most bass. If it is only against one wall, not so much bass. To reduce bass response to a minimum, you would have to suspend the device from a wire in the middle of the room. Good luck. I would never buy a radio without a tone control; I literally inherited by Bose Wave Radio and use external speakers which do have tone controls.
press the EQ button until it says custom on the seting then press the tuner select button left or right and it will say bass or treble use the volume to turn it up or down then u got the bass control.:)
Turn the bass gain all the way down., Turn up your your volume on bass test song. Crank up the little box next to the steering wheel wide open . Now go gradually turn up the bass gain on the RF amp until you get distortion. Turn the gain down slightly. Now you can enjoy playing the bass from one end of the little boxes setting to the other without ovrloading your amp and subs. Open a can of whoopass on anyone who tries to crank up on your gain.