PBR 300X2 issues - Road Glide Forums
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post #1 of 19 (permalink) Old 03-09-2016, 08:22 PM Thread Starter
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PBR 300X2 issues

So, I installed the amp last month. Last week I put in the Kappa 62.11...

Amp suddenly today started clipping anytime I get above half volume,

The gain was set below 5. I turned it all the way down, but it still clipped (off on off on...).

Reading around it seemed folks had to resolve this by getting another amp. So as I purchased through Amazon, they are sending me another and I'll send this one back.


I checked wiring, everything I could think off, but it's all good.

Is there anything else I might check? Am I missing something?
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post #2 of 19 (permalink) Old 03-09-2016, 08:47 PM
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So by clipping, do you mean the amp is cycling on and off?
If yes, what is your battery voltage, more specifically, the voltage getting to the amp?
The amp drove your original speakers OK?
What are your amp settings?

2015 Road Glide, Mysterious Red Sunglow
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post #3 of 19 (permalink) Old 03-09-2016, 08:57 PM Thread Starter
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Power is 12.3
Speakers I didn't check as its enough to turn the amp on.

Speaking of, when the amp would cut out, the light would stay on...

HPF - less than 5 gain when it started, all the way down and still had the issue. Frequency was at 125.
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post #4 of 19 (permalink) Old 03-09-2016, 08:59 PM Thread Starter
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It cut out yesterday, fuse wasn't blown but wasnt transmitting power, new fuse, all was well.

Worked for about an hour, going to work, and then all the way home until I got in the garage, then forever cutting out and then back on...
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post #5 of 19 (permalink) Old 03-09-2016, 09:04 PM Thread Starter
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If it matters the Power Vision reads between 13.9 and 14.1 volts when it's running.
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post #6 of 19 (permalink) Old 03-10-2016, 11:04 AM
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I had the same problem, amp worked fine then the clipping came out of nowhere. No matter where I set the gain it still clipped badly. I replaced the amp with a Cewin Vega B2 and wala the kappas woke up. The sound was way better.

Last edited by N2DEEP; 03-12-2016 at 05:49 PM.
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post #7 of 19 (permalink) Old 03-10-2016, 02:53 PM
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Originally Posted by N2DEEP View Post
I replaced the amp with a Cewin Vega B2 and wala the kappas woke up. The sound was way times better.
Even though the PBR 300X2 was on everybody's list as a cost effective alternative to a $300 or $400 AMP, I skipped that and went with a recommendation for the Cerwin-Vega B2 from another forum. So i can't compare the two from personal experience, but I have been 100% happy with the CV B2.

They are getting impossible to find though. And even the latest generation (B52) is getting hard to lay your hands on as well.
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post #8 of 19 (permalink) Old 03-10-2016, 02:57 PM
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Originally Posted by SquirtRGU View Post
So, I installed the amp last month. Last week I put in the Kappa 62.11...

Amp suddenly today started clipping anytime I get above half volume,

The gain was set below 5. I turned it all the way down, but it still clipped (off on off on...).

Reading around it seemed folks had to resolve this by getting another amp. So as I purchased through Amazon, they are sending me another and I'll send this one back.


I checked wiring, everything I could think off, but it's all good.

Is there anything else I might check? Am I missing something?
I had similar problem after 8 months of use. When ever I gave it any volume, it would cut out. Funny thing is, it wouldn't do it playing Fm, only cd or aux. I thought my HK was bad . Replaced with Alpine HU and it did it on all selections. Replaced amp and been rockin ever since.
I don't think those pbr's like the heat or vibrations . JMO.

2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.
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post #9 of 19 (permalink) Old 03-10-2016, 06:41 PM Thread Starter
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Well that's not a glaring review I'm going try with the replacement that will be here tomorrow. If that has I'll try other....
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post #10 of 19 (permalink) Old 03-10-2016, 08:25 PM
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I also have the CV B2 amp with the kappas, along with a aquatic head unit. The amp has worked flawlessly since the install along with everything else, knock on wood. I can not stress enough the importance of dialing in the amp. Between SQ and volume, tuning of the amp is so important.
I have had my fairing off twice after the install for minor tweaks of the amp and it has made a major improvement, initial gain setting was around 2o'clock if I remember correctly. Both times the gain has been turned down. Crazy as it might sound, the loudness and SQ has improved dramatically.
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