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Old 21st December 2017, 04:05 PM   #161
BP1Fanatic is offline BP1Fanatic  United States
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Join Date: Jan 2009
Location: Columbus, Ohio
Quote:
Originally Posted by Infinite Audio NZ View Post
8 x slightly modified ES18's, ready to be painted and loaded with Fane Col's. Next up, finishing the Othorns =D

Click the image to open in full size.
That stack looks AWESOME!
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Old 10th March 2018, 05:10 AM   #162
dyode is offline dyode  Australia
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Join Date: Nov 2015
Default My 12" sub

Hi,

I occasionally wanted more thump to complement the Zaph ZRT 2 ways so I designed and built a 12" PR sub as below as an experiment and they sound OK.

I used 24mm baltic birch ply double thick baffle and shellaced it out of curiosity - worked OK.

I drive it with a PWR-ICE125 and shove a pair of socks into the Zaph ports when I run the Marchand 80Hz CO box to feed the subbie + Zaphs.

At other times I run the Zaphs alone (esp acoustic Jazz etc).

As you can see by the paucity of foam I don't know much but I like the sound... better buy more foam.

I blew up the crossovers and the two drivers in the left speaker when I drank too much and wondered if I could get the Scanspeak cones driven by the 250W amp (Holton Amps parts) to touch the opposite wall...they just fell short... so that's why I put a 10k log pot into the box with the Marchand Hi/Lo pass boards in it and cunningly made the knob silver like the front panel...

Clearly I have no idea what I am doing but it's fun and it sounds good...
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Old 10th March 2018, 10:16 AM   #163
Zuhl is offline Zuhl  England
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Location: Sheffield, UK
Prototype small room sub. 180ltr ported enclosure. Peerless 12" XXLS rear facing with a BK-300 plate amp.

It features a 12db/oct passive crossover as the amp's 'contour control' was exactly that and didn't roll off the upper bass enough. Response is -3db at 16hz and -6db at 14hz.

The bass is a bit soft for my liking, but, that's the price of using a cheap amp. That's something I need to fix.

As for music, Poulenc's Concerto in G minor for Organ, Strings and Timpani (Telarc CD-80643) is scary. I can play it at normal listening levels with little effort from the sub. Towards the end there's a sustained low note, well over a minute long, which bunged my ears up...
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One good thing about music, when it hits you, you feel no pain - Bob Marley

Linn Karik + Naim NAC72/HiCap/NAP250/NACA5
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Old 12th June 2018, 03:50 AM   #164
Arthur Jackson is offline Arthur Jackson  United States
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Join Date: Dec 2014
Default Sub-thing to be seen

Latest sub project is a dual 12 with a backwards downward firing reverse phase woofer. Its cabinet is 1/2 MDF glued to cement board for constrained layer effect and that covered with mahogany and flame maple. I over did it with mortise and tenon construction. The butterfly is padauk. Notice the whiskey glass is not moving. It has a 1 Kw plate amp, mostly because it was on sale. Its plenty loud without all that power.
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Old 12th June 2018, 04:00 AM   #165
Arthur Jackson is offline Arthur Jackson  United States
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My pictures keep getting posted sidewards. Help or tips for the newb?
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Old 18th June 2018, 06:40 PM   #166
Bern Wansen is offline Bern Wansen  Brazil
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Join Date: Mar 2015
Good evening!
Here are some photos of my horned subwoofer enclosure project that Im making from scrap wood boards from old cabinets the neighborhood droped next to the place I live
Here the fold pattern is deligned and some blocks of wood glued for later fixation of vertical walls of that will make up the horn

sawing... yes I used a handsaw. Its a good tool... a professional saw that's very sharp and trusty.

Then we have proceeded to remove the decorative foil of noble wood that was skinning off anyway... painted the boards with acrylic paint primer then acrylic paint (I was just testing the tone of this blue dye). Later refinents are currently being made on this subject of the finishing of the outsides.

The box was reassembled and the void filled with poliurethane foam. All junctions were sealed with silicon rubber.

Subwoofer hole was cut (omgosh I missed the diameter about 3 times but in the final cut the sub did fit very tightly)

Finally sub was positioned and glued with silicon rubber. No, I can not take it off never and ever again

The cable terminals extend out of the box as you can see, through 2 brass electrical grade screws so I don't really care what happens since everything left to be worked on is the amplifier connections
I didn't even test if the subwoofer is working yet
And not last, but in memory of my friend who helped me with the chisel
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