Sooo, I bought a TL.

[TaylorFade 10+ year member]

I love this thing! I probably have the lowest numbers of any TL owner, but whatevs.

I have been researching about how to find resonant frequency and I tried the method that was suggested and I just wanted a little feedback on what I found. I built a 1cf box for a 10 that I had laying around. It's a RD classic and since I couldn't find any T/S on it to be able to build a box with a .7 Q, I tested in "real time" outside the car first going from 37-67hz. Then I put it in the car and ran the same frequencies. The peak outside the car was 39 & 40hz. The peak inside the car was 42hz. The biggest cabin gain I got was +4.7db @ 43 & 44hz. Unfortunately, There was no pronounced peak any higher than that and I actually had a negative cabin gain in the mid-50's and low-60's.

These were all done at a steady ~ half volume because I didnt' want to foul the numbers by the amp heating up or voltage drops. And the sub in the car was sub up in the driver's corner. I suppose I could run them again with different sub placements to see if that changes the results any, but what do you guys make of those numbers?

And since I got it I have been going nuts metering every car in sight with a sub. Lol. Just wanted to share some of the results with y'all

- (2) AA Mayhem 18's on a pair of big *** RF amps (5K's?) in an Avalanche. 151.0 @ 51hz. High, I know, but that was his peak.

- Single Crossfire 15 on an AQ2200 @ 2 ohms in a Foxbox in a blazer. Sub up, port driver's side 143.7 @ 41hz.

- (4) Polk MoMo 15's on an Orion 5k in ~ 4 cubes sealed in a toyota with a camper. 142.7@ 51hz. Lol.

- Single e8 on a Punch 75 in a single cab Dodge. .6 tuned to 33hz. 127.4@41 on music. Well, before we blew it. Lol

...and shit that I have tried in my car. All on ~ 1kw in the trunk of my lexus IS300.

- 2510 in 2.25 net, 36 sq in of port tuned to 37. 141.0 @ 37hz

- 2510 in a 4th order. .6 sealed, 1.3 ported. 36 sq in of port tuned to 49. 139.7 @ 41hz

- Kicker L7 10 in 1.1 net with a 32" long 6" pvc port. Sub up driver's side, port into the passenger corner. 138.1@51hz

- (3) eD 3.6's in that QW horn thing I posted a build log for. 137.1@ 40hz. I don't know if you guys get the eD newsletter, but that box made the front page of it. Lol.

Woohoo! Who wants to get metered!?

Click to read more...

 

[T3mpest 10+ year member]

I love this thing! I probably have the lowest numbers of any TL owner, but whatevs.
I have been researching about how to find resonant frequency and I tried the method that was suggested and I just wanted a little feedback on what I found. I built a 1cf box for a 10 that I had laying around. It's a RD classic and since I couldn't find any T/S on it to be able to build a box with a .7 Q, I tested in "real time" outside the car first going from 37-67hz. Then I put it in the car and ran the same frequencies. The peak outside the car was 39 & 40hz. The peak inside the car was 42hz. The biggest cabin gain I got was +4.7db @ 43 & 44hz. Unfortunately, There was no pronounced peak any higher than that and I actually had a negative cabin gain in the mid-50's and low-60's.

These were all done at a steady ~ half volume because I didnt' want to foul the numbers by the amp heating up or voltage drops. And the sub in the car was sub up in the driver's corner. I suppose I could run them again with different sub placements to see if that changes the results any, but what do you guys make of those numbers?

And since I got it I have been going nuts metering every car in sight with a sub. Lol. Just wanted to share some of the results with y'all

- (2) AA Mayhem 18's on a pair of big *** RF amps (5K's?) in an Avalanche. 151.0 @ 51hz. High, I know, but that was his peak.

- Single Crossfire 15 on an AQ2200 @ 2 ohms in a Foxbox in a blazer. Sub up, port driver's side 143.7 @ 41hz.

- (4) Polk MoMo 15's on an Orion 5k in ~ 4 cubes sealed in a toyota with a camper. 142.7@ 51hz. Lol.

- Single e8 on a Punch 75 in a single cab Dodge. .6 tuned to 33hz. 127.4@41 on music. Well, before we blew it. Lol

...and shit that I have tried in my car. All on ~ 1kw in the trunk of my lexus IS300.

- 2510 in 2.25 net, 36 sq in of port tuned to 37. 141.0 @ 37hz

- 2510 in a 4th order. .6 sealed, 1.3 ported. 36 sq in of port tuned to 49. 139.7 @ 41hz

- Kicker L7 10 in 1.1 net with a 32" long 6" pvc port. Sub up driver's side, port into the passenger corner. 138.1@51hz

- (3) eD 3.6's in that QW horn thing I posted a build log for. 137.1@ 40hz. I don't know if you guys get the eD newsletter, but that box made the front page of it. Lol.

Woohoo! Who wants to get metered!?

The Q of the enclosure has no bearing. You metered it outside and metered it inside. The only change was the car's acoustics itself. Take actual measured in car at each one-measured outside car the number that is biggest is where you got the most actual gain, that's the frequency your car is giving you the most boost. What's actually loudest is irrelevant, that's why people get confused and are like "my box is tuned to 30, but the car peaks at 42". They say that, but it's usually the box and car combo that peaks at 42, that's a different measurement lol. 43 or 44hz is what your shooting to meter on, tone wise, that's where your car adds the most db's. If you want to try a different location, go ahead, simply keep the old out of car measurements and subtract the new values in that location. Your looking for the biggest DIFFERENCE, not the biggest number...

Also, you want to measure close to the cone, but far away from ANY boundaries. At the frequencies your working with, you want to be as far as possible, like 100feet if you can (srs). I live in illinois, empty corn fields in the country work wonders lol.

 

[TaylorFade 10+ year member]

Also, you want to measure close to the cone, but far away from ANY boundaries. At the frequencies your working with, you want to be as far as possible, like 100feet if you can (srs). I live in illinois, empty corn fields in the country work wonders lol.

Wait... you're talking about outside the car, right? (I guess that's obvious) Because I did do the "out of car" testing under my carport. Should I retest like in the middle of my yard or a parking lot or something? I had the mic pretty close to the sub; maybe 6" or so, but it wasn't more than say 10-15' from the carport wall.

I was worried that maybe the little sealed box was peaky around 40-44hz and that's why the "in car", "out of car" and biggest cabin gain were all so close together. I was also hoping for a big, fat peak at like 60hz. Lol. No such luck.

 

[CRXBMPN 5,000+ posts]

i can have a pretty flat curve (which doesnt make much sense) with my spl burp setups @ half volume, turn ish up and you will see some more defined peaks etc. When I go 3/4 or full volume I can see huge gains and drops... try it again with more volume!