Just installed pbr300x2 and arc audio moto 602s last weekend. Sounds good and louder than stock but I guess I was just expecting more. Anybody else have this combo? What settings are you using on your amp. I experimentEd with hp and cross over between 80 and 50 but found that ap sounds better. I have the gain at 5. Just looking to see what everyone thinks of this combo.

 

The 300x2 is a nice entry level amp for 2 ohm speakers in a low budget system.

It simply doesn't have the intestinal fortitude to push 4 ohm speakers to anywhere near their capability, especially the 602s that crave power to really reach their potential.

 

the 602 is spec'd a 88dB at 1 watt 1 meter- which is std measurement for speaker efficiency

the hertz are 92 dB..which would appear ( to the ear) to be more than twice as loud - at the exact same settings (head unit and amp)

I use the infinity kappas which would appear to be even louder than that, spec'd at 94 dB

so these other speakers produce more sound waves per watt than the 602's.
all in all you would need more watts to get same "sound" as my speakers.
how much- just a guessimate but close to 150 watts at 4 ohms... except the 602's are rated at 75 watts.


there may be a reason- maybe the 602's use a more robust cone material ( takes more power to move it) or the crossover type used ( passive crossovers waste power when filtering) or they have a different frequency response.


the kappas ($95) are 2 ohm with a handling capacity of 150 w, the PBR at 2 ohm will put out about 150 watts- so there is a match there- the spkr capacity and amp distortion would both happen at 150w.

the forums were right on this- the kappas are a great choice with HK alone, or with the 300x2
previous disappointment with J&7.25's ( sounded horrible), wanted to try the polks, but the new version MM651-UM doesn't fit in the fairing.
kappas were on sale at xmas

Mike

 

You said more in fewer words than I did!

but a question, the 602's are rated at 75W continuous- are some riders then exceeding that rating?

Mike

 

^^^^^^
Yeah That!
Roadie is absolutely correct!! The PBR300X2 is definitely the WRONG amp for the Moto's.

Sell it and run this one bridged.
Night and day difference!!

https://www.crutchfield.com/p_136984...c&awug=9016148

 

The Moto's are way underrated mk. Manufacturers typically do this to prevent novice installers from blowing up their speakers. Those speakers can take 200 watts of continuous power all day everyday!!

 

Ok thanks- so what do you think is smarter for him...bigger amp or more efficient speakers?

Mike

 

Yes, that's pretty common with that speaker. I ran mine off a BT 2180 at 180W and they would have liked more. It's not uncommon for guys to run amps bridged at 240 or even more and they take it like a champ as long as they don't get crazy on the gains. Out of everything I've ran they're my favorite coax speaker in that price range. Just a solid all around speaker any way you slice it.

 

The amp I suggested will run those speakers with power. That amp is very efficient and also produces way more power than it's rated. it's certified at 180 watts bridged. The Moto's are dam good speakers. They just need a little more power than most due to their low sensitivity rating. On the other hand the low sensitivity rating is what makes them deliver more bass than high sensitivity speakers. It's a trade off bro!

 

So I am going be audio dumb here. If the speaker's are rated for 90w and the amp is 150 per channel. That's not enough power?