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post #1 of 9 (permalink) Old 06-10-2014, 02:04 PM Thread Starter
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Distortion question...

I switched out my stock fairing speakers for a new pair of HogTunes speakers. I still have the stock HK head unit. Although the HogTunes speakers put out sound better than the stock speakers, I still get distortion at high volume while riding. I'd like to know what I can do to get rid of this high volume distortion for better sounding clarity at speed. Thanks so much for your input...
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post #2 of 9 (permalink) Old 06-10-2014, 02:23 PM
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The distortion is coming from the HU, your best bet is to get an amp. I personally would change the HU, but if you want to keep your present head unit and get even better sound with an amp, look into getting RCA jacks installed.

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post #3 of 9 (permalink) Old 06-10-2014, 03:56 PM
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Specifically, the distortion is coming from the internal amp system within your head unit. All amps and HU will have some measure of distortion. With a stock HU and no external amp, you have no way of adjusting the amp (gain, freq response) to your speakers to minimize the distortion.

Dbell is right about the RCA jacks.
When installed correctly, they bypass the internal amp and thus eliminate the distortion coming out of your radio. However, whichever amp you use will come with distortion, some more than others, but like I said, using gain and freq response you can reduce it.

Ps-if you use one of the Rockford fosgate amps(pbr 300x4, pbr 300x2), be wary of using them with RCA jacks. They seem to sound much better using speaker level input. Go figure.


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post #4 of 9 (permalink) Old 06-10-2014, 04:14 PM
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Quote:
Originally Posted by dbell66253 View Post
The distortion is coming from the HU, your best bet is to get an amp. I personally would change the HU, but if you want to keep your present head unit and get even better sound with an amp, look into getting RCA jacks installed.

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Dbell is spot on. The head unit is the source of your distortion. From almost any HU the max volume before distortion is about 75% of its max on the stock unit that is right around the "e."

Depending on budget and preferences options are amp the stock unit or replace HU and install amp. For the absolute best sound and to avoid any clipping/distortion have your set up tuned by a professional. They will set the gain and filters on your amp so that you can achieve the best undistorted sound your set up can provide. The tuning will also prevent you inadvertently damaging your speakers by sending the distortion through them.

My suggestions change the head unit it will give you better sound all the way around. pick a good one with at least 4v preouts.
Amplifier I would suggest something like the Arc Audio You will be able to push those speakers nicely

If you don't want to swap HU then use the PBR 300x2 decent power and easy install. Just as was stated it sounds best with the speaker level inputs. you also won't have to purchase the Hawg wired or Biketronics units to maintain hand controls.
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post #5 of 9 (permalink) Old 06-10-2014, 09:30 PM Thread Starter
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Okay so I see it's an amp upgrade fix. Considering I already installed the HogTunes speakers would it be suffice to add the HogTunes NCA-70.2 REV ...70 watts/channel at minimum 2 ohms and will work with all models of Hogtunes replacement speakers
Includes all required wiring if amp will power fairing speakers, fairing lower speakers, rear speakers, or if this amp is being used as second amp in a Hogtunes system are included in this kit
SERIES AMP ...
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post #6 of 9 (permalink) Old 06-10-2014, 10:07 PM
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The more powerful the amp the better. If you are not going to change the HU make sure the amp you go with has an variable crossover. Some amps have just the high/low/full settings but you will still get some noticeable distortion. The settings are too generic. A variable crossover will let you fine tune the sound more exact. I have the Arc Audio 125 and it worked great with the stock HU running some alpine speakers. I've changed the radio not too long ago and it sounds even better.


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V&H Exhaust//Stage 1 intake//6k HIDS//12" KW Flare//12" Buky Assaults// Arc Audio 125.2// Alpine 5 1/4 components// Alpine head unit//color matched gauges//chrome this chrome that
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post #7 of 9 (permalink) Old 06-11-2014, 12:12 PM
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I still stick with my suggestion of the Arc Audio 125.2
adjustable and powerful enough for those Hog tunes speakers.
Just remembered you can use the speaker level inputs and have RCA's wired to them to use other amps. But the Arc Audio 125.2 does have speaker level inputs. Whick i forgot when I mentioned the PBR 300
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post #8 of 9 (permalink) Old 06-11-2014, 01:49 PM Thread Starter
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With a budget in mind, I'm tryin to keep amp fundage under $200.00 Has anyone had or currently use the Rockford Fosgate PBR 300W 2-CH amp? These are goin for around $170.00 Here are some specs:
[/SIZ300 Watt Boosted Rail Technology 2-Channel Amplifier

•12dB/octave crossover
•MOSFET output stage
•High level inputs
•Ultra compact chassis
•Variable 4-6 volt hi level DC offset voltage input turn-on control



Amplifier Specifications
Amplifier Class Class BR
Number of Channels 2 Channels
RMS Power (4 ohms) 100 watts x 2 channels
RMS Power (2 ohms) 150 watts x 2 channels
RMS Power (1 ohm)
Bridged RMS Power 300 watts x 1 channel
Total RMS Power Output 300 watts
Peak Power Output N/A
Total Peak Power Output N/A
Maximum Input Gauge Size 10 awg
Minimum Impedance Unbridged 2 ohms
Minimum Impedance Bridged
THD at Rated RMS Power .02%
Speaker Level Inputs
Preamp Outputs
Built-in Crossover Low-pass (LP)
High-Pass Crossover Frequency
Low-Pass Crossover Frequency 50 - 500 Hz
Subsonic Filter N/A
Signal-to-Noise Ratio 105 dB
Channel Separation N/A
Bass Boost
Bass/Gain Remote
Fan Cooled
Fuse Rating 30A
CEA-2006 Compliant Yes



Dimensions (HxWxL): 1.53" x 4.25" x 6.75"
(3.90cm x 10.8cm x 17.2cm)

....What's your opinion(s)???

Last edited by Johnzz1420; 06-11-2014 at 01:51 PM.
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post #9 of 9 (permalink) Old 06-13-2014, 03:47 PM
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There's a lot of information here on the Rockford amps, the 300x2 is a decent amp for the money. It works well with the HD head unit because for some reason the high level input seems to be a lot better than the RCA input on that particular series amplifier.

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