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Old 6th February 2013, 10:53 PM   #51
solhaga is offline solhaga  Sweden
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So there´s been some updates. I finally got the correct length of phase plugs for my Apollo TD15Hs.
I re-designed the baffles and built me some focused arrays comprising 16 EAD E60s aside.
Xover at 400 Hz, tremendous pressure from the bass drivers.
Vocals now have full body.

View from sweetspot:
Click the image to open in full size.
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Old 14th January 2014, 09:01 AM   #52
tuyen is offline tuyen  Australia
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Well done and very nice!

May I ask how you are applying eq required to compensate for the baffle rolloff effects?

I too am starting an OB build with 2x AE Dipole18 per side. Was hoping to run them to 200-300hz. Hopefully can get it to work well with a lot of experimentation and a bit of understanding.

Cheers!
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Old 14th January 2014, 10:50 AM   #53
solhaga is offline solhaga  Sweden
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I have a slightly different setup nowadays, but the woofer port is more or less the same:
Click the image to open in full size.

I currently XO at 250 Hz and compensate +6 dB/octave using Frequency Allocator.
Something like this:
Click the image to open in full size.
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Old 17th January 2014, 06:26 PM   #54
taloyd is offline taloyd  United States
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Default Why Apollo?

Hello,

Just wondering why you got the Apollo upgrade when you're only running the speakers at 1/20 the ~RMS~ power - assuming you're still using 25W per speakers? Generally the Apollo is for compensating for one driver doing the work of two, and so the increased power handling/heatsinking allows for less thermally compressed dynamics given the compromise of one driver over two...

Just wondering. I imagine a 3 way with the bottom 4 woofers substituted with IB15s would also be an improvement - although a 3 way will always be more complicated than a 2 way.

cheers,
-Tal
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Old 17th January 2014, 07:01 PM   #55
solhaga is offline solhaga  Sweden
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At the time I ordered the TDs I wasn't sure if I would keep them, so having the Apollo upgrade would make it easier to resell them or have them in another configuration.
Nor was I sure that the 45 W per woofer I got out of the GainClones would suffice for my needs.

But the power was enough and so was the low frequency response, I see no need of a three way system.

Besides I think that the control, with lower Qts of the TDs compared to the IBs, is more important for the sound reproduction quality than the IBs ability to produce low bas. 1 W SPL is also 3 dB higher with the TDs making the 45 W enough.
I also think that having three TDs aside actively driven by one GC each keeps the distortion at low levels.
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Old 25th May 2014, 07:54 PM   #56
solhaga is offline solhaga  Sweden
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Default Paint it black

Decided that the plywood was too bright, so I painted it black:
Click the image to open in full size.

While at it, I sanded the phase plugs:
Click the image to open in full size.
and sprayed them mate black:
Click the image to open in full size.

and mounted them:
Click the image to open in full size.

Had some wrong delivered phase plugs laying around, why not let them crawl the walls in order to add some diffraction::
Click the image to open in full size.

Click the image to open in full size.

I realize of course that they don´t have any effect, I simply had some holes in the wall that I needed covered.
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Old 27th May 2014, 07:55 AM   #57
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Default Cool set up!

Congratulations Solhaga,

Active two way with OB bass and plenty Sd....Nice!
Please can you tell me about your mid / top driver / horn...Looks interesting.
Crossing over at 250 / 300Hz?

Thanks in advance
Derek.
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Old 27th May 2014, 08:18 AM   #58
solhaga is offline solhaga  Sweden
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It is an DIY AMT. You can follow my efforts here.
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Old 27th May 2014, 08:31 AM   #59
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Thanks, it looks interesting.
Are you pleased with the results?
I like the Beyma TPL when crossed over around 1,500Hz.
Is your AMT able to match the TPL's top end?
Last question, in the 250Hz to 1,500Hz band can you let me know what your reference divers are? ie what is the best cone(s) drivers you have compared it to?

Thanks again and all the best
Derek.
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Old 27th May 2014, 08:37 AM   #60
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Default Manger comparison

PS
I am a long time user and fan of the "Bending Mode Radiator" Manger driver.
Long shot here....!Have you ever compared your AMT with an actively driven Manger ?
Cheers
D.
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