Question about Hifonics Brutus BXi 1206D Car Audio Amplifier

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Amps how do i adjust they phase and subsonic on the amp and what does it do

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The phase is used to match the phase of the sub, highs amps. If you don't know how to determine if there's a phasing problem between the two amps and you can hear no difference, leave it set to 0.

Many people use the subsonic to prevent over driving speakers in a ported enclosure. If you're using a sealed enclosure, leave it set to the lowest frequency. If you have a ported enclosure, set it just below the resonant frequency of the port in your enclosure.

Posted on Apr 08, 2008

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I replaced the shuttle and need to do the phasing adjustment. Can you tell me how?


IMPORTANT The printer must be printing the Phase pattern of “H’s” when the Phasing Value is changed, or the New Phasing Value will not be written into NVRAM. If the value is changed when not printing, the printer will return to its default phasing
value when powered off then back on.
1. Install the ribbon.
2. Load full width (136 column) paper.
3. Power on the printer and set top of form.
4. Press Stop to put the printer into NOT READY mode.
5. Press Scroll + Scroll to unlock the Enter key.
6. Press Scroll + Scroll + Return + Enter to enter the CE Tests menu. (Press all four keys at the same time.)
7. The display will show “SERVICE / PRINTER MECHANISM TESTS”, the first menu item. Press Enter to enter the
mechanism tests menu.
8. Press Scrollor Scrolluntil
“PRINTER MECHANISM TESTS / HAMMER PHASING” is on the display.
9. Press Enter. The printer begins printing all H’s, each line preceded by the phasing index number.
10. Press Return. The display will show
“SERVICE / PRINTER MECHANISM TESTS”.
11. Press Scroll or Scroll until “SERVICE / HAMMER PHASE VALUE” is on the display.
12. Press Enter. The top line of the display will show
“HAMMER PHASE VALUE” and the bottom line will show the current phasing index number.
13. Press Enter. The phasing index (followed by an asterisk) will move up to the top line of the display.
14. Press Scroll or Scroll to increase or decrease the phasing index, then press Enter to activate the value as it prints.
Continue to increase or decrease the phasing index until the pattern of H’s appears.

15. When the print pattern is acceptable, press Stop. Printing stops, and the printer automatically enters the current phase
index value into NVRAM. The display shows “NOT READY”.
16. Press Scroll + Scroll to lock the Enter key.
17. Close the printer cover. Press Start to put the printer into READY mode.
NOTE: If you changed the phasing value, power down the printer, remove the shuttle cover, and write the new phase value on
the aluminum shuttle casting.

Oct 06, 2009 | IBM 6400 Matrix Printer

1 Answer

No manual for my amp.


  • Class-D Monoblock Amplifier
  • Bass Boost Level and Frequency Remote Included
  • Variable Low-Pass Filter: 50 - 200 Hz (24 dB/Oct.)
  • Variable Input Sensitivity: 200mV - 5V
  • Phase Shift: 0° / 180°
  • Variable Infrasonic (Subsonic) Filter: 0/15Hz/25Hz (18 dB/Oct.)
  • High- and Low-Level Inputs
  • 1 Ohm Stable
  • RMS Power Output:
    • 500 watts x 1 chan. @ 4 ohms
    • 900 watts x 1 chan. @ 2 ohm
  • Preamp Outputs: 1 Pair
  • Bass Boost: 0 - 18 dB @ 40 - 100 Hz (Variable)
  • Dimensions: 15" L x 11-5/16" W x 2-3/8" H

Oct 05, 2009 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

Amp turns on, no sound comes out, replaced output transistors


i would be looking into the input stage of the amp. seeing that amp has a protection circuit if it saw a issue with the output's it would put the amp into protect mode and not let the power supply turn on. so the issue is most likely in the input side of the board . from the symptoms it sounds that way also.

Aug 25, 2009 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

I have a Boss OL5KD Class D Monoblock Amplifier and I set it up but is no sound coming up from the speakers, can anyone tell me how to higher the volumen? where is located the volumen??I need to higher the...


Hello maydude01,

The Boss OL5KD does not have a volume control. It has an "Input Level" adjustment which is used to match the output from your head unit preamp output to the amp. It is the first rotary control just to the right of the input jacks.

If you have no sound at all, I'd suspect that something is incorrectly connected or there is no input to the amp. First make sure that the amp power light (green LED) is coming on when you turn on the receiver and that the protection light (red LED) stays off. Then check all of your wiring, especially the RCA output cables.

Initially set the controls like this: MASTER/SLAVE switch in MASTER position (left). INPUT SENSITIVITY 2v-8v (right). INPUT LEVEL, SUBSONIC FILTER, BASS BOOST, and LOW PASS FILTER; midrange. PHASE SHIFT "0" (left). Leave the remote level control disconnected.

After you've checked all wiring and initially set the switches and controls, turn the receiver on to about 3/4 volume. Now adjust the INPUT LEVEL to the left just until you begin to hear distortion, then turn it back right just a little. Adjust the other controls for best sound. Plug in the remote level control and make sure that it adjusts the bass up and down. You're finished!

If there's still no output from the unit after checking all of the wiring, either the unit is defective, it's not getting an input from the receiver, or the sub(s) are defective.

Hope this helps.

Aug 14, 2009 | Boss Car Audio & Video

2 Answers

Legacy Amp 2600 watt HELP


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.

Jun 28, 2009 | Legacy Car Audio & Video

1 Answer

Amp assistence


The jl100/1v2 puts out the same amount of power between 1.5 - 4 ohm loads so you dont have to really set up anything to match your sub- wire the coils in parrallel and plug it in- set infrasonic(subsonic) filter at 15 hz(lowest) set crossover piont at close to 80 hz set gain about half-or if you kow the voltage from your source unit match the source voltage to the amps input voltage setting-it should pound like a champ with no problems

May 20, 2009 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

What is the subsonic filter for?


Hello luckybear22,

The simple answer is that a subsonic filter prevents frequencies below the threshold of hearing, hence subsonic, from being sent to the subwoofer. Such frequencies result in a loss of available amp power and in the extreme can even damage the speaker.

Hope this helps.

May 15, 2009 | Performance Teknique ICBM-2400 Digital...

1 Answer

What is the subsonic for on the performance teknique amp


The subsonic filter is used to filter out the bass that is too low for the human ear to detect or hear--remember the lower the frequency or bass note that you try to play the harder the amp has to try to reproduce it-so by filtering out the bass that you cant hear it saves life on your amp and subs and your not missing anything anyways cuz ya couldnt hear it to begin with.

May 14, 2009 | Performance Teknique ICBM-2400 Digital...

1 Answer

Brutus 1206D


set the lp filter to about 100 to 125 (or lower if want seep boomy only) , put the bass eq no more than 75% but i would recommend no more than 50%, gain is to match the sound not to adjust power with so it is a user preference start all the way down and slowly go up till u hear distortion then turn it back down by about 10 - 15 %, phase shoild typically be at 0 degrees, subsonic depends on if you r using sealed or ported ported turn it all the way down then adjust as needed to get rid of the lower sounds you dont want (muddy sloppy sounding bass) if sealed turn it all the way up to at least 35 hz.

Jun 18, 2008 | Hifonics Brutus BXi 1206D Car Audio...

1 Answer

Brutus 1206D


u need at least another amp and set em at 2 ohm and then just take it to a shop aand ask thee guy to equalize it he shouldnt charge u or at least 10 bucks

Jun 18, 2008 | Hifonics Brutus BXi 1206D Car Audio...

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