Thread changed to reflect current strategy of building dual LAB 12 based subs. Drivers were purchased while living in Cambodia and sound great with music. New build info starts after post #12.
After months of planning, changing directions, and rethinking I am moving forward building a pair of transmission line subs. The design was developed over the past year and half on diyAudio while I was out of country, but now I am ready to start the build. diyAudio member tb46 is the developer of this design and is finalizing putting the Hornresp model into a schematic plan. I was going to go sealed, but at the end of the day I wanted to do something different.
Hornresp Data: Calculated tuning around 22.6 Hz based on minimal cone excursion
Based on latest iteration of the plan, the enclosure will measure 25.5" H x 25.5" D x 16" W. Once finalized I will post and develop the cut sheet. Dual subs will be powered by an Adcom GFA555 amp (for now).
Internal dividers will have around a 3.2 degree angle. I remember reading on one of the tapped horn build threads that when using PL adhesive you don't have to cut the panels to exact degree. Would appreciate any feedback on whether I need to cut the internal dividers at the angle or will the PL adhesive fill the gaps?
I am hoping for an in room response of 115 dB @ 1 M per sub (250 W/4 ohm input). I guess time will tell. I have REW and a calibrated Cross-spectrum Labs calibrated EMM-6 USB microphone. Once subs are built I will try to figure out room measurements.
My space is rather large (~4,800^3) but these two subs will be used as flanking subs for my 4 Pi speakers. I primarily listen to music (75%). WIll post photos as time allows.
For HT they will be paired with an 18" Mael-X sub (sealed, 5.9 ft^3, Qtc: 6.5) powered by a QSC RMX1850HD amp. For eq I have a miniDSP (2x4), Behringer DSP1124P and Behringer FBQ2496.
Hope to start sawing wood in next couple of weeks, but the holidays may intervene.
Thanks for reading, hope these turn out well....