Which of these systems is quieter??

[bikerboy]

Smart Car Exhaust *QUIET SYSTEM* Center Dual Tip,DTH

smart car Performance Exhaust by Solo Performance - Center Exit

[CABUTT]

I have the solo I would not say it is quiet. Sounds good but still loud in the car. Really well built exhaust, First class. But wife said it had to go.

[SMART]

The new quiet system is very queit and still has the same performance boost. I recall riding in a car with the pre-production unit and thought it was the exhaust for me especially over any of the previous exhausts.

[bikerboy]

Anybody understand the decibel rating for the dt system.

Idle: 69.1 db 82 db 70 db

@ 65mph: 72.6 db 77.3 db 75 db

So at idle its 69.1,82 or 75? Which is it? Same w/ at 65mph. Is it 72.6,77.3,or 75? Anybody have the dt system who could comment on how loud it is relative to the oem system.

[John_H]

Originally Posted by bikerboy

Anybody understand the decibel rating for the dt system.

The line above read:

Stock Exhaust 83406 (Current System) 83406Q (New Quiet System)

which, once translated, means the 1st number corresponds to the stock exhaust, the 2nd number is the original "current system" and the 3rd column is the newer improved "quiet system." So at idle the new quiet system is 0.9dB louder than stock (not terribly noticeable) and at 65 it's louder but not horrendously so. It's a bit shy of being twice the sound power compared to stock.

[bikerboy]

well okay thanks a lot but how do you come to the conclusion that its almost "twice the sound power" if its not too much louder than the stock system?

Anybody out there know the db rating(s) for the Brabus system? I want to see how loud it is compared to that one. I don't want it to be louder than that

[geosynch]

I recently added an Evil Twin dual center. I've been meaning to take pictures and post a video, but have been busy. Here is the Reader's Digest version:

While it is quiet, I don't really like the sound. (Man I am a picky S*B!) Also, it is NOT centered. This actually bugs me quite a bit. I had the rear valence cut for the BPP, which looked great (but was too loud, etc.). The Evil Twin simply isn't lined up in the cutout....

I'll live with it for awhile. All these aftermarket exhausts are taxing my toy budget!

geoysnch

[John_H]

Originally Posted by bikerboy

well okay thanks a lot but how do you come to the conclusion that its almost "twice the sound power" if its not too much louder than the stock system?

Every 3db is twice the sound power. The dynamic range of our hearing is about 120dB. From the faintest sound to the loudest, we go through 40 of these power doublings. Not 40x, but 2^40. About 1 trillion times the power (million million for you brits out there). Double the power is noticeable but it's not yelling versus talking. From a random sound engineer out on the interwebs, "normal talking is usually between 50-60 dB and yelling can be up around 80 dB's." So double the sound power isn't terribly significant but it is a difference and one that can be an issue for people a bit more sensitive to background noise.

A mention from one Australian university site states that "One decibel is close to the Just Noticeable Difference (JND) for sound level." You can listen to the sound files from that site (the one dB difference being a good choice) at dB: What is a decibel?

[SmartMadness]

The Remus would be the closest to an OEM sound. All the Remus units are sold out, but we are expecting a new shipment at the end of this month.

We have a pretty large shipment coming in, soooo expect a promo once they are here!

We are also working with SOLO right now on 3 new exhausts that will be available in about 3 weeks...

[fts1966]

i have the solo. it is a nice unit. have been in cars with the others. this unit is quiet. no drone. although it does have more noise that i was hoping for. but happy and will keep it till they get something a bit quieter. will wait a year to see what happens with the other units.

frank