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Old 26th March 2011, 03:27 AM   #1
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ShinOBIWAN's Avatar
Join Date: Feb 2004
Location: UK
Default Oh no, he's back

Hey guys, hope you've all been keeping well and your DIY endeavours are fortuitous.

Particularly warm greetings to all the old faces I see on here. I've been away from the hobby for a couple of years and yep that was largely because I started dating. Life got pretty complicated at that point, one thing led to another and then before I knew it I'd got no time for DIY. Great news is the honeymoon period is long over now and things are settling down nicely so I finally get to self indulge without too much hassle

I thought I'd do another build thread like the ones of old so lets get the ball rolling with me ranting about random details.

For this one I thought I'd start off nice and steady to get back into things so nothing overly ambitious. I do tend to get carried away when I start designing but this time whenever I looked at that 350 tweeter I got a slap round the back of the head and my wallet taken off me, ouch. Funny that isn't it, I used to take it for granted not to have to ask permission for anything yet now I have to get quotes and have them OKed by the powers by that be. Don't laugh, I'm a relative noob to being under the thumb but I'm fast learning not to ask and just hide the receipts down the back of the sofa!

So with that said what we have here is a very tidy compact stand mount using proven high quality components rather than the boutique exotica I've been suckere... erm... drawn to in the past.

Before getting down to the nitty gritty I can say these have been a long time coming. I originally drew up the plans in the middle of 2009, did all the design work and then shelved it. Fast forward to the end of last year and I ordered a load of small drivers from 4" upto 5.5" and began testing them. It was great fun to do that again, I'd missed it for sure. In case your interested I tried out Seas 4" and 5" Excel driver in both magnesium and nextel varieties and Scanspeak Revelator and Illuminator in 5". Interesting that despite the sometimes very different design specifics between these drivers they all performed very well and sounded not completely dissimilar. Once you get to this level of accuracy and performance its a lot harder to pick 'the one' as they're all suitable but eventually I choose Seas W12CY001. This is Seas magnesium 4" driver and does some seriously nice things with music for such a compact little thing. Midrange performance is absolutely spot on, rarely have I heard such a nice blend of detail and warmth. It was surreal how content I was with it, perfect almost. Mids aside you'd expect bass to be weaker from such a small driver and yes its not as extended as say the 5" Revelator which was probably the 'best' in this area but the output is very clean and defined in a ported box. With the test boxes placed about a 1ft from the rear wall they did good down to 40hz which is right about where most music starts to ignore the lower frequencies and despite the lack of ultimate depth the rest of what these drivers are capable of is fierce.

For all tests I used the small footprint Scanspeak Illuminator D30 which allows for a tight center to center spacing on the baffle. Again another great driver and the integration between the 4" and the 1" dome is seemless.

Its often said but good small bookshelves really do things like imaging and soundstage size with such ease, in fact these easily rival my own favourite and sizeable DIY design that I built a couple of years ago and I thought those were hard to beat in that area. I expect things to improve even more in the final cabinets as the prototypes were basic rectangular affairs with removable baffles for ease of auditioning. In comparison the final cabs will have a tiny baffle area created by the angular facets that also reduce diffraction and to top things off in the usual OTT style I plan to construct them with a 63mm thick composite laminated construction consisting of mdf, marine ply and hdf. Cabinet colouration be gone

Another interesting development in the past couple of years are the compact DSP boards from Hypex and DSP4You. These open up a whole new level of convenience and performance and as some around here might remember I'm a great proponent of DSP active systems. In my main system I use a DEQX to great effect and whilst these smaller devices aren't as powerful or flexible they are compact enough to allow integration into a cabinet and this is great news imo. You could even do some low frequency room EQ if needed, all that's needed is a PC and USB. I'll certainly be using DPS in this design and going active.

Wow ok that turned out to be quite a rant but I've been away for awhile so hopefully you'll forgive me

Enough talk, here's a rather pretty artsy fartsy render. And who said us northerners weren't posh? A trusty and sexy LGT is in the background for dramatic effect and scale.

Click the image to open in full size.

And that's about it, thanks for looking and again greetings to familiar faces. I'll update with more details and pictures once I start construction over the coming weeks.

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Old 26th March 2011, 04:37 AM   #2
tinitus is offline tinitus  Europe
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hello Shin
good to hear from you again
I guess we could use a 'challenge'
but we know you will be impossible to beat

so, we are in for some crazy cuttings, and lots of saw dust
I suppose your wife have no idea about what is coming....saw dust every where
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Old 26th March 2011, 04:39 AM   #3
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Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Welcome back shin...

community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
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Old 26th March 2011, 04:48 AM   #4
49 - for the 19th time!!!
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c2cthomas's Avatar
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Location: Near "Music City" (Nashville Tennessee)
Originally Posted by tinitus View Post
I suppose your wife have no idea about what is coming....saw dust every where
Hello Shin - great to see you back - and congrats about finding a partner to share life's joys with.

Unlike tinitus - I expect that YOU have no idea about what is coming - unless you were very careful in your auditioning process.

We refer to our better halfs as SWMBO for a reason. Well - actually several reasons.
DIY audio can be expensive but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"
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Old 26th March 2011, 05:29 AM   #5
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Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Welcome back Shin!.........There are more faces to see here...........some gone.
I guess you passed the "audition".....found yourself a woman with similar likes.& etc. My successful "audition" I was un-aware, when I brought her over to my place for the first time, I played Van Halen (One) on vinyl thru my DIY loudspeakers. For a rocker girl raised on Ozzy, AC/DC, & the rest of em' , I was the perfect guy.

_______________________________________________Ric k..........
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Old 27th March 2011, 09:16 PM   #6
ScottG is offline ScottG  United States
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Location: US

..so let me guess, judging by the size of the latest creation you found someone to spend your money.

-looks excellent btw!
perspective is everything
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Old 28th March 2011, 12:06 AM   #7
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Location: UK
Thanks guys and yes Scott your partly right about that. Even if I wanted to I doubt I'll get the chance to toy with elaborate designs again any time soon. The reality is I couldn't be happier with how the LGT turned out and so whilst I still have plenty of passion for speaker design, another design in the same direction would end up large scale on all fronts and, back then, it did feel at times like I was chasing some fantasy rather than simply enjoying things for what they are. Perfect or even near perfect speakers don't exist yet so this design isn't meant to replace what's come before, they're simply an excuse to indulge and have a bit of fun again
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Old 28th March 2011, 01:37 AM   #8
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Location: Near Vancouver
Hiya Ant. Nice to see you back.
planet10 needs your help:
Let's help Ruth and Dave
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Old 5th April 2011, 10:32 PM   #9
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ShinOBIWAN's Avatar
Join Date: Feb 2004
Location: UK
New toy:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

And some W12CY001 pics:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
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Old 5th April 2011, 10:49 PM   #10
obiwan is offline obiwan  Australia
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How many are you making???
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