Learn from my audio mistakes - Victory Forums - Victory Motorcycle Forum
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post #1 of 7 (permalink) Old 05-03-2016, 07:16 PM Thread Starter
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Default Learn from my audio mistakes

I bought a


Punch 300X2 amp and Polk Audio MM521 5.25" speakers. The speakers are rated at 90w RMS but at 2 ohm so with an amp rated at 150w at 2 ohm (the certs that came with my amp shows it really puts out 190w @ 2 ohm) and me setting the gain at I think it was 5 I smoked them in around a week. I bought a second set of the exact same speakers and set the gain at 3 so now it took a little linger to kill them. I'm now down 2 sets of speakers. Being the smart guy I am I now go for


and they sound great but are only rated at 60w RMS and my amp puts out 100w RMS (again the certs show mine puts out 124w @ 4 ohm) That's much closer but now I'm paranoid about killing a third set of speakers so yea here I go again (should have bought them the first time) and bought a set of


rated at 100w RMS with 300w peaks so they'll handle what the Fosgate can throw at them. My biggest part of the Kickers was I didn't put an amp on the bike just to keep it turned down I wanted volume and these speakers honestly don't have as sweet a sound as the Polk's they sound good and really wake up when you drive them.

My head unit is clean up to 20 on the volume so that's where I set the gain and it sounded great up to around 5 so I backed it down to 4.5. This sucker will about take your head off at 20 but that's not the reason behind it it's so it 75mph I can turn it up to 15 and get wind defeating sound that crisp and clean.

I added


for protection against water and dirt and got a bonus with the way the mid-range now sounds it made it sound a lot better. I guess instead of the mids going into the fairing they're directed at me.


Lessons learned here buy speakers able to handle the RMS of the amp. I like to share what I learn from successes and failures so others might not repeat what I've done.

Oh yea my wife's car is going to get a nice set of Polk Audio DB651's!!

2015 Cross Country (bought new 7/11/15)
2015 Suzuki V-Strom DL650 (bought new 4/26/17)
2006 Triumph Rocket III Classic
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Timing wheel +4
Lloydz high-flow air cleaner
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If it's not broke, make it better

Last edited by vindex1963; 05-03-2016 at 07:23 PM.
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post #2 of 7 (permalink) Old 05-04-2016, 08:57 AM
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That's a shame and a real waste of money...but a good lesson to pass along.

The gain stage on an amp very often misunderstood. It's not a volume knob to make an amp put out less power. Turning input gain down will not protect speakers that are rated for much lower power. When you turn your head unit up, regardless of your gain settings, your amp will still have the potential to produce the rated wattage and blow speakers that aren't rated for that power.

Gain is a setting for the front end input of your amp. It simply gives the user control...to make sure you're not distorting signal on the input side.

Your speakers should always match the output rating of your amp for more than one reason. On the other side of the spectrum...under powered speakers will never sound as good as they should.
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post #3 of 7 (permalink) Old 05-04-2016, 10:51 AM Thread Starter
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You're right it was a waste of money but one saving note is the speakers weren't high end $$$ but enough for it to be a shame.

2015 Cross Country (bought new 7/11/15)
2015 Suzuki V-Strom DL650 (bought new 4/26/17)
2006 Triumph Rocket III Classic
1/4 turn throttle ring
Tank riser
VM-1 DR cams
Timing wheel +4
Lloydz high-flow air cleaner
Bassani baffled OEM mufflers
PC-V 118hp 116tq
If it's not broke, make it better
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post #4 of 7 (permalink) Old 05-04-2016, 02:25 PM
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I looked at the link you posted for the boom mat enclosures - they might be too small. There should be some reference (on or in the package) as to how much enclosure is needed for the particular speakers. Just a heads up.

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post #5 of 7 (permalink) Old 05-04-2016, 04:03 PM Thread Starter
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Quote:
Originally Posted by toejam View Post
I looked at the link you posted for the boom mat enclosures - they might be too small. There should be some reference (on or in the package) as to how much enclosure is needed for the particular speakers. Just a heads up.

Already installed them. Perfect fit and used gorilla tape after I screwed them in.

Click




.




.

2015 Cross Country (bought new 7/11/15)
2015 Suzuki V-Strom DL650 (bought new 4/26/17)
2006 Triumph Rocket III Classic
1/4 turn throttle ring
Tank riser
VM-1 DR cams
Timing wheel +4
Lloydz high-flow air cleaner
Bassani baffled OEM mufflers
PC-V 118hp 116tq
If it's not broke, make it better

Last edited by vindex1963; 05-04-2016 at 04:05 PM.
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post #6 of 7 (permalink) Old 05-04-2016, 06:52 PM
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Thanks for the info Vindex. I'll be getting those same Kickers in the next couple weeks.
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post #7 of 7 (permalink) Old 05-05-2016, 05:47 AM Thread Starter
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Quote:
Originally Posted by newj64 View Post
Thanks for the info Vindex. I'll be getting those same Kickers in the next couple weeks.
I've found setting the iPod nano's EQ to off is the best sound. The Polks liked the Rock EQ setting the Kickers didn't.

2015 Cross Country (bought new 7/11/15)
2015 Suzuki V-Strom DL650 (bought new 4/26/17)
2006 Triumph Rocket III Classic
1/4 turn throttle ring
Tank riser
VM-1 DR cams
Timing wheel +4
Lloydz high-flow air cleaner
Bassani baffled OEM mufflers
PC-V 118hp 116tq
If it's not broke, make it better
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