RL-P18 meets the "DOH! button" - Page 8 - AVS Forum
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post #211 of 330 Old 11-11-2007, 11:08 AM
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Pfff....only tested down to 8hz. :Roll Eyes

J/K Looks great! I just ordered a Galaxy CM-140 to get started. Other than that waiting for Fi Audio to get those 18's ready!! :drooooool

Quad 18's with 2000 watts ought to rock my world! Especially since I haven't had a sub in the house in years!

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post #212 of 330 Old 11-11-2007, 12:31 PM - Thread Starter
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OK, just can't stop playing with REW.

I stood the sub up and moved it into the corner of the room to see how that would affect FR. Previous measurements were with the sub "horiztonal" and beneath the screen (as pictured earlier in this thread).



Moving it into the corner made a big difference. The graph below was done with the mic in the exact same position as the first graph I did with the big dip at 58.5 Hz, but there is no trace of that dip now.



Also note I changed the scale to 5 dB increments instead of 10.

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post #213 of 330 Old 11-11-2007, 12:56 PM
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Looks better, the center placement doesn't look bad though, how does it sound in comparison? Oh and you really need to do something about that low end extension a -3db at 11hz just isn't going to cut it. HaHa, that's insane.
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post #214 of 330 Old 11-11-2007, 01:12 PM - Thread Starter
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No clipping on the amp. She's got a few more dBs in her for sure.

Almost ready to give that Epik Conquest a run for its money.

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post #215 of 330 Old 11-11-2007, 03:20 PM
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Wait a sec...that is with just one still??? Yowzers!

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----Check my QUAD 18" Fi IB Build Thread!! (DONE) King of the 400 lb Gorilla
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post #216 of 330 Old 11-11-2007, 03:26 PM - Thread Starter
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Yeah. Just one sub and 750 watts max from a single channel on the QSC amp. The sub has more in it but I'm just too chicken to crank the gain up any more because REW starts the sweep at 0 Hz (no way to change that). There's a ridiculous amount of cone movement down below 10 Hz. Also, REW doesn't seem to allow the SPL meter to be calibrated at a level over 100, so that makes it a bit more difficult to do high SPL readings.

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post #217 of 330 Old 11-11-2007, 03:58 PM
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Looks great, Bradley! I was gonna recommend to do 5dB scale but you already took care of that. One problem though...*ahem*....WHY ARENT YOU HOOKING UP THE SECOND?!?!? Are you mad!?! Dude! Hook up the second one.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #218 of 330 Old 11-11-2007, 04:09 PM
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Damnit I want my subs!!! I might have to give in to the wife and drive down to Clovis to visit her friend -tell her to drop me off at Scott's house to get my fix

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post #219 of 330 Old 11-11-2007, 04:15 PM
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Hehehe...quad Fi18's would be pretty insane...much more so than my dual SS18's. When you come by this way youll have to drop me a line. A good demo of the Haunting or WotW will be fun.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #220 of 330 Old 11-11-2007, 04:31 PM - Thread Starter
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Quote:
Originally Posted by Scott Simonian View Post

One problem though...*ahem*....WHY ARENT YOU HOOKING UP THE SECOND?!?!?

Because I've been having too much fun with the first one! I haven't even started gluing the second box together yet. All the panels and braces are already cut, routing is done, including the big port flares. Should go together pretty fast once I get my butt in gear again.

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Originally Posted by Avus_M3 View Post

I might have to give in to the wife and drive down to Clovis to visit her friend -tell her to drop me off at Scott's house to get my fix

DO IT! Google says 206 mi – about 3 hours 20 mins - from Cameron Park to Clovis. If I lived in CA, I would have already been to Scott's house by now! But 909 miles and 14 hours of driving... well, I may be crazy, but not THAT crazy.

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post #221 of 330 Old 11-11-2007, 04:37 PM
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Quote:


Because I've been having too much fun with the first one! I haven't even started gluing the second box together yet. All the panels and braces are already cut, routing is done, including the big port flares. Should go together pretty fast once I get my butt in gear again.

Mmhmmm....mmhmmmm. I made sure that I had both done at the same time while building mine. I had no intention on putting more hours on one woof and not the other. But thats just me and my doings. I would seriously consider taking a break off having fun with the one and finish the other. I mean, why did you buy the second? Hehehe...jk. But for realz...you should put together the second, take some measurements then. Im certain your house will REALLY rock then.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #222 of 330 Old 11-11-2007, 11:50 PM - Thread Starter
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Quote:
Originally Posted by Scott Simonian View Post

Mmhmmm....mmhmmmm. I made sure that I had both done at the same time while building mine. I had no intention on putting more hours on one woof and not the other. But thats just me and my doings. I would seriously consider taking a break off having fun with the one and finish the other. I mean, why did you buy the second?

Oh, man... you're totally busting my balls about the second sub!

Fine. I guess I "deserve it". I'll have you know that I went out the garage tonight and fondled the remaining pieces of MDF for a bit, just to let them know they had not been completely forgotten about.

What I was REALLY worried about is the MDF warping from being stood up on end and leaned against the wall for an extended period of time. Oh dear...

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post #223 of 330 Old 11-12-2007, 11:43 AM
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More reason to follow you sig:
"Build it and they will come"

BTW BTP...your not to far out of the loop for a visit either...my wife's uncle owns some property in Seattle across the bay. We just need a good excuse to go up there (and some time).

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----Check my QUAD 18" Fi IB Build Thread!! (DONE) King of the 400 lb Gorilla
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post #224 of 330 Old 11-12-2007, 02:05 PM
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Thats lots of dual SS 18 owners for you to pay a visit.

Quote:


Oh, man... you're totally busting my balls about the second sub!

Heheheh...only cause you have that poor, poor 18 sitting on the floor looking for a home. Poor guy looks like he's looking for a handout. "Build me a home. Please!" Eh, trust me Bradley. When you build and finish the second and hook that baby up, youll wonder why you didnt finish it a week ago. Its so worth the extra 6dB and not only that but the headroom. Now to get identical SPLs a single woofer is working with a 1/4 of the power for the same SPL. That extra Sd (and Vd) is awesome!

Quote:


What I was REALLY worried about is the MDF warping from being stood up on end and leaned against the wall for an extended period of time. Oh dear...

Oooo! More of a reason to finish it and have him meet his twin brother.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #225 of 330 Old 11-12-2007, 06:26 PM
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WOW. Beautiful graphs. Excellent work
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post #226 of 330 Old 11-12-2007, 06:48 PM
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I'm gonna save up till I can afford 3x more. That'll be an upgrade.
Psh, Dual 18er"s..

"The choices we make define our lives, because choice, not chance, determines destiny"

They call me the 18 year old DJ Audiophile-upgradeitis infected-guy!
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post #227 of 330 Old 11-12-2007, 08:08 PM
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Quote:
I'm gonna save up till I can afford 3x more. That'll be an upgrade.
Psh, Dual 18er"s..

Mmmm....extra 12dB there.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #228 of 330 Old 11-17-2007, 04:50 PM - Thread Starter
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Holy crap... my thread slipped all the down to page 2 on the DIY forum! Can't let that happen.

This is for you Scott... better late than never.



See, I actually started on the second sub.

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post #229 of 330 Old 11-18-2007, 08:08 PM - Thread Starter
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Deja vu? Actually, I'm using the saw horses this time which makes it easier to fit and adjust the clamps.












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post #230 of 330 Old 11-18-2007, 08:10 PM
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Damn dude! Deja vu or not, that is nice execution there.

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post #231 of 330 Old 11-19-2007, 11:18 AM
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Quote:


This is for you Scott... better late than never.

Damn right...

There ya go!

You'll be smiling big time when you hook up and fire up that second sub.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #232 of 330 Old 11-20-2007, 07:33 PM
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You're motivating me to finish mine. Excellent work

I look forward to more pics
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post #233 of 330 Old 11-21-2007, 12:23 PM
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The Fi's are a no go...no response from them so screw it. Going my original route after too much delay. Prepare for another entry into the brotherhood of dual RL-P18 owners. Should have them in a week or so hopefully.

Now the hard choice:

QSC PLX1804

or

Crown XS 900 or 1200

I feel the QSC PLX is a better amp but the Crown is cheaper (at least for the 900).

Edit: This decision was fueled a good deal by the success you and Scott have had

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post #234 of 330 Old 11-21-2007, 12:46 PM - Thread Starter
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Really? They just posted the final specs on the new 18 IB driver over on the HT Shack. The RL-P18 is a nice driver but I'm not sure it is ideal for IB, especially given the price.

Regarding amps, take a look at the Measuring Amplifiers thread. The XS 900 tested pretty well, so the XS 1200 should be even better. Keep in mind that there is no bridging on the PLX 1804, it's either 4 or 8 ohms per channel. Not sure how robust the power supply is for subwoofer duties. I was looking at a new one for $529 and change on eBay but ultimately I decided to go with a used CE4000 for not much more $ than that.

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post #235 of 330 Old 11-21-2007, 12:52 PM
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Quote:
Originally Posted by Avus_M3 View Post

The Fi's are a no go...no response from them so screw it. Going my original route after too much delay. Prepare for another entry into the brotherhood of dual RL-P18 owners. Should have them in a week or so hopefully.

Now the hard choice:

QSC PLX1804

or

Crown XS 900 or 1200

I feel the QSC PLX is a better amp but the Crown is cheaper (at least for the 900).

I'm surprised. Fi has excellent customer service. I suggest you try again. It's the Holiday, could it be the lack of response?

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post #236 of 330 Old 11-21-2007, 01:35 PM
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Posted by Scott on 11/19/07

Quote:


Looking at about 2 weeks for the production run of coils and we will get stock built up on these.

Substitute the word "then" for the word "and"....

Somewhat problematic to build and ship drivers before they have the parts.
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post #237 of 330 Old 11-21-2007, 02:37 PM
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Quote:
Originally Posted by Thomas-W View Post

Posted by Scott on 11/19/07

Substitute the word "then" for the word "and"....

Somewhat problematic to build and ship drivers before they have the parts.

On the 6th Scott posted this on The Shack:
Quote:


I will be testing the last of the coils for it sometime this week and will post specs and results up. Hopefully we will go into production the following week. As these are "standard" subs we will make a stocking run on them so that there shouldnt be a lead time like the balance of the custom made drivers.

Ill keep everyone posted and start a new thread with pics and specs.

Thanks,
Scott

This was 2 weeks ago. They should have already been available by now. I posted in the thread some time ago and pm'd him...both no response. I am assuming that he is not as close to production as hoped. Don't feel in anyway that I am attacking him...I am sure he is just really really busy with business.

I don't think it's worthwhile for me to wait anymore for the following reasons:
  • Unknown results or specs with these drivers (Unlike the RL's)
  • Unknown time frame of when they will be actually released
  • Price is still up in air although he said around $209
  • It seems that FI is made more for SPL than SQ (I could be wrong)
  • I am getting a major itch for some NICE DEEP BASS!!
As for the IB use I am dropping that and going with the "twin towers". I won't take up anymore of BTP's thread though and will start my own with questions regarding size and tune. Sorry for the inconvenience.

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post #238 of 330 Old 11-21-2007, 02:57 PM - Thread Starter
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A pair of RL-P18s will do you right. While there are some advantages to doing an IB installation, you can now look forward to having the ability to move your big box or sonotube subs to various locations in the room to achieve the flattest natural response. And obviously you can also take them with you when/if you move to a new house.

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post #239 of 330 Old 11-21-2007, 04:08 PM
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Quote:
Originally Posted by Avus_M3 View Post

*snip*

Well yeah, if you have decided to switch to two external ported enclosures, then the Rl-18 makes a TON of sense. It is IMO, the driver for such a purpose right now.
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post #240 of 330 Old 11-21-2007, 04:40 PM
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Quote:
Originally Posted by btp View Post

Really? They just posted the final specs on the new 18 IB driver over on the HT Shack. The RL-P18 is a nice driver but I'm not sure it is ideal for IB, especially given the price.

Regarding amps, take a look at the Measuring Amplifiers thread. The XS 900 tested pretty well, so the XS 1200 should be even better. Keep in mind that there is no bridging on the PLX 1804, it's either 4 or 8 ohms per channel. Not sure how robust the power supply is for subwoofer duties. I was looking at a new one for $529 and change on eBay but ultimately I decided to go with a used CE4000 for not much more $ than that.

Ahh...missed that thread Bradley Anyways, I am sticking with my RL's

Quote:
Originally Posted by Willd View Post

Well yeah, if you have decided to switch to two external ported enclosures, then the Rl-18 makes a TON of sense. It is IMO, the driver for such a purpose right now.

That is what I gathered from my research. I will let everyone know how it goes.

BTW sorry again...I am really not trying to threadjack. Feel free to delete these post anyone.

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----Check my QUAD 18" Fi IB Build Thread!! (DONE) King of the 400 lb Gorilla
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