Dave's Dual RL-P18 Sonotube Design/Build Thread

**Avus_M3** · **12-12-07, 05:11 PM**

New developments:
*Received the amp
*Done with school (semester)
*Sold my Samsung

So now I will rearrange my living room and hunt down a nice plasma!

**Avus_M3** · **12-15-07, 01:55 PM**

Measured the response of the Behringer UCA202:

Looks pretty good...especially compared to the internal sound card on my laptop! This ought to work nice with the Galaxy Mic!

**Avus_M3** · **12-29-07, 01:22 PM**

Due to WAF (not main reason), my redesign of the living room (main reason), and our purchase of a Pioneer PDP I am changing my plans. I am selling my RL's (http://www.hometheatershack.com/foru...subs-sale.html <--shameless plug) and going to go the IB route to have a more open living room.

**Avus_M3** · **02-07-08, 02:50 PM**

Well sold my RL's a few days ago. Time for 4 FI IB 18's.

**Avus_M3** · **02-07-08, 02:50 PM**

I designed the manifold.

First version:

I removed the third laminated sheet and reduced size slightly:

Cut Sheet (1 sheet of OSB, 1 sheet of 49X96 MDF, 1 sheet of 24X48 MDF:

**Avus_M3** · **02-07-08, 02:51 PM**

Modeled them as well.

SPL at xmax:

Group Delay:

Cone Excursion (Well, I am not amp limited

):

View Poll Results: What tuning point and size should I run?
<13hz	6	35.29%
13 - 13.5hz	4	23.53%
14hz - 14.5hz	7	41.18%
520 Liters	1	5.88%
650 Liters	5	29.41%
700 Liters - 715 Liters	6	35.29%
Multiple Choice Poll. Voters: 17. You may not vote on this poll

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