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I have a pioneer DEH-X55HD hu and a kicker DX250.1 amp. The question is the sub control i have set at 100hz on the hu and the amp has a lpf crossover non adjustable at 80hz. There is no way to bypass the sub control on the head unit. Would this be ok?

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Posted on Jan 02, 2017

etirbynnor
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SOURCE: Frequencies

Hello again ronnieyannon,

It's probably best to allow the amp that is powering the subs to control the frequencies going to the sub(s). I would not use the lpf on both the head unit and the amp in any case. The control settings are not completely precise and you could end up with a lot of tweaking between the units to get the sound you want. I'd send full range to the amp and with it playing something with a lot of bass, set the 401s to "LP", the crossover slope to near maximum, and then adjust the frequency until it sounded best to me. Starting on page 11 of your manual are the Rockford-Fosgate recommended adjustment procedures, including setting the gains and the filter frequency.

Those numbers for the lpf on your head unit sounds like it allows you to decrease (-24dB), as well as increase (+6dB) the bass at the specific frequencies of 50, 63, 80 and 100Hz. You probably don't want to decrease the bass boost for subs. And the 401s will allow a boost up to 12dB and is variable from 50-250Hz.

Hope this helps.

Posted on Apr 24, 2009

  • 1114 Answers

SOURCE: Kicker dx 250.1 class d monoblock amp has a fixed

Do you have the subwoofer amp connected to the pioneer thru pre amp connections; pre amp output of pioneer to pre amp input of Kicker amp. Page 10 of the manual explains how to adjust the subwoofer output. You can select the cutoff freq. that will pass to the subwoofer; The slopes don't match perfectly, but if you use the -12 slope , it should work fine.
Cut-off frequency:
50HZ
-
63HZ
-
80HZ same as kicker cut in freq
-
100HZ
-
125HZ
-
160HZ
-
200HZ
Output level:
-
24
to
+6
Slope level:
-
6
-
-
12


http://www.pioneerelectronics.com/StaticFiles/Manuals/Car/DEH-X5500HD_OwnersManual112712.pdf

Posted on May 19, 2014

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Kicker dx 250.1 class d monoblock amp has a fixed lpf at 80 hz 24db octave non adjustable. My car stereo is a pioneer deh-x55hd with the sub control set at 100 hz -6 slope unable to turn sub control off to...


Do you have the subwoofer amp connected to the pioneer thru pre amp connections; pre amp output of pioneer to pre amp input of Kicker amp. Page 10 of the manual explains how to adjust the subwoofer output. You can select the cutoff freq. that will pass to the subwoofer; The slopes don't match perfectly, but if you use the -12 slope , it should work fine.
Cut-off frequency:
50HZ
-
63HZ
-
80HZ same as kicker cut in freq
-
100HZ
-
125HZ
-
160HZ
-
200HZ
Output level:
-
24
to
+6
Slope level:
-
6
-
-
12


http://www.pioneerelectronics.com/StaticFiles/Manuals/Car/DEH-X5500HD_OwnersManual112712.pdf

May 19, 2014 | Car Audio & Video

1 Answer

The recommended settings for a mofet car amp 50.4 , theres a few knobs not sure what they should be turned to


The gain knob is used to control how much the volume (output) of the amp increases with each increase in volume on the deck (installed in the dash). This is used to match speakers running of your deck. Other knobs are probably for a crossover (labelled in Hz). This controls what frequencies are passed to the speakers connected to the amp. A Highpass (HPF) crossover passes all frequencies above what the knob is set for. A Lowpass (LPF) pass all frequencies below what the knob is set for. A HPF is typically used when the amp is powering component or full range speakers to keep the ultra low frequencies (anything below 90Hz) from going to theses speakers. A LPF is used when the amp is connected to a sub. Subs dont handle higher frequencies very well.

Nov 02, 2013 | Crossfire Car Audio & Video

1 Answer

How do u know if A sony xplode XM-552ZR amp is on and how do u connect it to a sony xplode cdx-gt570 head unit.


Just to the left of the output (speaker) terminals, near the top of the amp, there's an LED marked "POWER/PROTECTOR". If the amp is connected properly and powered on, the LED is ON.

If the amp is being used for normal speakers, use a pair of RCA cables and connect the left/right channels to the appropriate inputs on the amp. The switch marked "LPF" should be "OFF".

If the amp is being used with the channels bridged for a subwoofer, use an RCA "Y" adapter and connect the single "Sub Out" preamp output from the head unit to both amp inputs. The switch marked "LPF" should be "ON" and the crossover set to about 80-100Hz.

Nov 03, 2010 | Sony Z2X-1200 SPL Car Amplifier (1200...

1 Answer

Which rca output should I use to connect to my amp/sub?


use the ones that say sub they are connected to a low pass internaly and wont put out sound to your amp also check your amp and make sure its on lpf and not full or hpf

Feb 06, 2010 | Pioneer DEH-P4800MP CD Player

2 Answers

Sounds like the amp is playing on full range instead of low


Sometimes the deck needs to be programmed to send only sub frequencies to the sub out. Check the manual or play with the settings. Most likely there is a way to turn it to a sub and a separate setting to change the crossover frequency.

If this is not working, there may be a problem with the Head Unit. If you have another amp in the system, try the sub out in the full range amp AT LOW VOLUME. If not you can use headphones and some alligator clips. Be careful you do not short out the output. Place one alligator on the crown of the RCA plug and one on the post. On the other side, place the crown clip to the connection on the top of the plug and the post on the tip of the plug. If this way you can see if indeed there is full range in the signal. You should here some voice, but not a lot, and a bunch of bass.

If there is too much frequency on the line after these steps then the head unit is not filtering properly and there are two things to be done. Repair or replace the unit. Or circumvent the filtering problem with either an in line RCA Filter or an electronic crossover.

May 15, 2009 | Kicker XS50 Car Audio Amplifier

1 Answer

Frequencies


Hello again ronnieyannon,

It's probably best to allow the amp that is powering the subs to control the frequencies going to the sub(s). I would not use the lpf on both the head unit and the amp in any case. The control settings are not completely precise and you could end up with a lot of tweaking between the units to get the sound you want. I'd send full range to the amp and with it playing something with a lot of bass, set the 401s to "LP", the crossover slope to near maximum, and then adjust the frequency until it sounded best to me. Starting on page 11 of your manual are the Rockford-Fosgate recommended adjustment procedures, including setting the gains and the filter frequency.

Those numbers for the lpf on your head unit sounds like it allows you to decrease (-24dB), as well as increase (+6dB) the bass at the specific frequencies of 50, 63, 80 and 100Hz. You probably don't want to decrease the bass boost for subs. And the 401s will allow a boost up to 12dB and is variable from 50-250Hz.

Hope this helps.

Apr 24, 2009 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

Still no sub woofer output


SET THE CROSSOVER TO "L.P.F."POSITION AND SELECT THE LOWEST FREQUENCY AS THE CROSSOVER POINT.
[AN AMPLIFIER IS SUPPOSED TO "AMPLIFY"(TO INCREASE)ANY OUTPUT.]

TRY CHANGING THE POLARITY OF WIRES FROM AMPLIFIER TO SPEAKERS /SUBWOOFER.{it leads to cancellation of bass output.}
if u still have doubt contact me again.

May 26, 2008 | Alpine CDE-7856 CD Player

1 Answer

Hooking up a new 8" woofer speaker to my amplifier


If I'm reading the amp manual right, you should be able to connect the amp in 3 channel mode. To do this:
  • Connect both left door speakers in parallel to Ch A Left.
  • Connect both right door speakers in parallel to Ch A Right.
  • Bridge Ch B and connect it to the new 8" sub.
  • Set the Ch A LPF/HPF to HPF.
  • Set the Ch B LPF/HPF to LPF.
This should allow you to run all 4 door speakers and the sub from the amp. It will also automatically route non-bass to the door speakers and "only bass" to the sub.

Mar 22, 2008 | Pioneer GM-6300F Car Audio Amplifier

2 Answers

BASS ADJUSTMENTS


What type of deck is it?

Mar 20, 2008 | Pioneer DEH-P6800MP CD Player

1 Answer

Protect light


Set your Filter Switch to LPF.  Turn the Bass Gain/ level all the way down temporarily. Set your Crossover to below 100HZ.  Then Turn on the system with a Bass test sound.  Turn up your bass Gain/level until you get distortion.  Then turn it back till you just get the distortion out. Then do not warn everyone that you will De-nad them if they touch your settings.

Oct 23, 2006 | Jensen JXP680 Car Audio Amplifier

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