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Bass boost and mute cross

Bass boost doesn't work properly

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My amp turns on good but after a while of too much bass causes a ugly sound too loud what could it be? Can it be repaired?


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.

Sep 12, 2015 | Car Audio & Video

1 Answer

I have 3 JL Audio 12


Reduce the amount of boost or, better yet, turn off the bass boost. With your installation, overemphasis on the bass is causing the rattles and distortion

Nov 16, 2012 | Kenwood KAC-9103D Car Audio Amplifier

1 Answer

Turn off dbfb without remote for sony md373


Sad, but true: without a remote it won't work. Had the same problem. Logetech Harmony 300 solved it in my case for a hcd ed1a. You can choose any sony device with a dfbf function. strangely for my modell logitech didn'nt support the bass boost function. so i searched for another version and found str-d511. with this device everything worked fine and i was able to switch the dbfb function off. you have to ad the bass boost function button manually. logitech harmony calls it bass boost, instead of sony dbfb. than ad this button to your device and you should be able to turn dbfb off.

Jan 23, 2012 | Audio Players & Recorders

1 Answer

Turned on radio amp started smoking on the side where the bass boost goes still got power on amp and voltage meter still works but bass boost does not work thats where the smoke came from


i would get it looked at, you never know. when ever your stuff starts to smoke it might work for a lil while but sooner or later my opoin it will be just junk.

Apr 23, 2010 | Alphasonik PMA800DA Car Audio Amplifier

1 Answer

Pyramid PB1500 vs. Metrik Rem. Bass knob????


Yeah it's probably not going to work because it's not even the same brand

Jan 18, 2010 | Pyramid PB1500 Car Audio Amplifier

1 Answer

Not gettin enough bass


Hello saini_jatt_2, On the JBL3501 700 watt monoblock, you have adjustments for low pass and a setting for boost marked DBO, allowing you to select and boost the frequencies sent to the subs. If your amp is not the 3501, but a different JBL amp, the settings may be different. Set the LP to either the white dot (about 100Hz) or slightly below to about 80Hz. Set the HP to about midscale or slightly higher. Set the boost to wherever the bass sounds best. One other setting that will affect bass volume is the "input level" or gain control. It should have been properly set by your installer, but you can "tweak" it for best performance. Turning it up increases the sensitivity and matches it with the output from your head unit. Too high will cause distortion. Too low will result in less bass. So you want to set it just to the point that you begin to hear the distortion and then back it off slightly until the distortion disappears. Hope this helps.

Jun 05, 2009 | JBL GTO1202D Car Subwoofer

1 Answer

STR-DE445 Works, but goes into protect when you turn up/down volume


This is a piece of **** unit. Mine only works on the left side, sometimes. When those times are I have NO idea. It doesn't seem to play 5.1 correctly and it goes into speaker protect mode for NO reason. It is TRUE lemon !!! ..let me know if you have any other problems with this JUNK .....schafe1001@aol.com

Aug 28, 2008 | Sony STR-DE445 Receiver

1 Answer

Bass boost/Gain


Both the bass boost and the gain generally do the same thing, except the bass boost is essentially "additional gain" at a particular frequency (in this case, 45Hz). I would suggest lowering the bass boost (10?) and adjust the gain. Honestly, you may have to play around with both settings until you find a happy medium. There is going to be a maximum the amp can provide no matter how you get there. Hope that helps!

Mar 03, 2008 | Jensen A600HLX Car Audio Amplifier

1 Answer

Low amp output


Make sure the BOSS isn't in "Protected" mode (Red led lit) and connect the speakers properly (check the connections if they are in "bridged" mode).
Also, make sure you set the cross-over, bass boost setting, bass volume control and the bridge mode according to the speakers you are connecting. Check the input level too.
The BOSS amplifiers are of very poor quality and it can be easily broken. Maybe yours is broken.

Feb 15, 2008 | Jl Audio E2150 Car Audio Amplifier

1 Answer

Subwoofer help


hard to tell whats causing this .Just curious make sure speaker wires going to subs are POLARIZED meaning positive from amp is with positive at woofer and NEGATIVE is with negative at woofer.When these are crossed and when volume is raised you will hear the bass cancell each other out..

Dec 06, 2007 | Car Audio & Video

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