Question about Hifonics XXV Sampson Car Amp

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How to set gains, brand new amps dont kno much about car audio.. how do i tune my amp for loud bass

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For loud bass is 120Hz the freq. and adjust the audio gain in scale 1 to 10 in 7.

Posted on May 06, 2010

  • Radames Pagan
    Radames Pagan May 06, 2010

    and the selector swith put in low. low is for bass---high is for trebel and full is for both.

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I have a kicker sx650 powering two kicker cvr 102 at 2ohms but i havve no clue on where to set the settings at and i know this amp should make these subs pound. i need to know exactly what to put each...


How I tune:
turn amp all way down or disconnect rcas for now, turn up stereo to a song with some bass you listen to and crank it as loud as you would (not max about 3/4, use this to tune inside speakers (don't have bass maxed/distortion...)). Now dial in amp: turn up a bit probably to 1/4 or so then tune frequency I'd usually say around 100hz, then adjust gain again to where it sounds good...be easy on them for awhile to let them break in (don't blast them all day!). Usually bass boost is only 1 frequency with a curve (40hz or something)...so I try to not use it much....

Apr 25, 2014 | Kicker Car Audio & Video

1 Answer

I have 2 12in kenwoods and a 1200 watt pyrimade amp, how can i hook these up to be the loudest


1st have your subs facing inwards towards the front of the car, not facing out the boot, This creates a better bass.

Wire 1 sub to one channel and the other sub to the other channel.

Turn down your gain as low as possible and then power everything up.

turn volume to desired loudness and then start turning up the gain slowly, if distorts a little turn in back down a notch.

avoid using bass boost, I agree it sounds great but it puts more strain on your amp and shortens its life.

after sorting out your gain, tweak all others until sound is bassy and clear with no distortion.

If you would like to use bass boost, turn on bass boost first, then up your gain etc.

Jan 16, 2013 | Pyramid PB915X 1200 Watts 2 Channel...

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JL 13w7 & 1000/1 Settings


There is no "perfect" setting that can be placed in a manual. It's all done by ear. Your settings will vary depending on the vehicle you are in, the type of enclosure you have, the type of music you listen too, how much voltage your deck put's out. There are many variables, but I can try to give you a basic guide.

First of all you need to know your enclosure. If you have a ported enclosure tuned in the mid to low 30's you may want to set the low pass to around 70-80 hz with your sub sonic set at 30 hz. this will give you the higher bass frequency you need for the loud bass you want, and protect the sub from going too far below the tuned frequency of the enclosure, and losing it's composure.

As far as the gain, and bass boost are concerned, you just have to adjust them by ear. First adjust the radio volume to normal listening levels, by that I mean as loud as it can go without the speakers in the car sounding like ****. Now you adjust the gain first. slow turn the gain control, carefuly watching and listening to the sub.. Adjust the gain to the point of the woofer getting a lil sloppy then back it down a bit until the sound is clean again. Now do the same with the bass boost. if there is a bass boost frequency adjustment, set that as close to the tuned frequency of the box as you can.

If you are in a sealed box the adjustments are a bit easier, and are all about taste. Adjust the radio as described before, and put on your favorite song. Next start udjust thing lowpass frequency to taste, not too high tho, try not us higher than 100 hz in your sub's for better sound. Sub sonic is not quite as important in a sealed box, as there is much less danger of the sub losing control.

Well good luck, and hope this helps!


Jul 13, 2009 | Jl Audio 13W7 Car Subwoofer

1 Answer

Amplifiers GT Series GT5-A604 ........explain settings


the amp probably has a x-over knob, a bass boost knob, and an eq knob. the eq is probably an internal crossover switch that will take the output from either high range (tweeters) or full range (6x9s) or low pass (subs) leave it on low pass. the bass boost however, will add distortion if turned up too high. its not noticable in the car, actually it sounds louder in the car but if you open the trunk and listen, you can tell its distorted bass and actually frying your speakers. the x-over knob is used to tune the frequency at which the amp stops pushing out bass tones. if you like rock music loud, turn it up higher, if you like low deep rap bass, turn it lower. keeping it too high might give you bad sound from either type though. ALSO THE GAIN OR LEVEL.IT IS NOT TO MAKE YOUR SUBS LOUDER IT WILL BLOW THEM .the gain is used to set your amp to your head unit which there is a procedure to do it.

Jun 15, 2009 | JBL GT5A604E 4-way Car Amplifier

2 Answers

Gain makes subs go crazy when turned up


HI DUDE UR AMP IS TO POWERFULL FOR THE SUB ... .... LOWER DOWN BASS IN UR PLAYER ... AND AMP .... TRY ADJUST BACK THE TUNE ... IT WILL B FINE ....

Apr 14, 2009 | Kicker KX800.2 Car Audio Amplifier

1 Answer

I have two kicker l5 10's with a 1600 DB SERIES bass dont sound very clear how can i make it clear and loud ?


Make sure to tune the amp according to the subs. Turn all the levels down on the amp, then start with turning up the gain till you can tell the sub is struggling, from there turn up the crossover to around 120hz. Then adjust the gain again as now it will prolly be to high. Also it depends on how you have the subs wired up.

Apr 06, 2009 | Kicker Solo-Baric L5 Car Subwoofer

1 Answer

Complicated JL Audio Amp


1. set the amp LP filter frequency at about 80hz and mode/slope to 24db.
2. set the amp gain as recommended in the manual.
3. set the subsonic to on and to about 25hz
4. ste the bass eq to off!
5. set the input voltage to low and signal sensing to off
6. Fine tune by ear.

Oct 28, 2008 | Jl Audio 13W7 Car Subwoofer

1 Answer

Dual voice coil speakers


best way to do this to preserve your amp and speaker is to wire the speaker Voice coils in series.

VC1 = Voice coil 1

AMP + to VC1 +
VC1 - to VC2 +
VC2 - to Amp -

Set you amps bass gain down very low. Crank up the volume with a bass test audio track. Turn the switch to LPF or Low pass filter. Adjust a LPF to about 60 hz Adjust the bass gain up until your Sub begins to sound sitorted or choppy. Then tune the bass gain just below where it distorts. Then you are set.

Dec 07, 2007 | Jl Audio 12W6v2 Car Subwoofer

2 Answers

Soung prob


Tune the gain on your amplifier powering the sub. Turn the Bass Gain on the amp all the way down and crank up your system to as loud as you can stand. Adjust the bass Gain until the Speaker begins to distort, then back off a little bit. This way you can crank it up and not get Bass Distortion early.

Nov 28, 2007 | Ultra Linear UL-1600M Car Audio Amplifier

1 Answer

Amplifeir keeps turning off


HI K-****, Adjust your Gain setting to limit just enough so the amp does not go into Protect mode.
  1. Turn your Gain all the way down,
  2. then crank up the bass from your system.
  3. GRadually turn up the gain until you trip on protect.
  4. Turn the gain back a notch and your set for no more protect.

Oct 19, 2006 | Jensen JPA460 Car Audio Amplifier

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