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Sachiko Builld Thread
Sachiko Builld Thread
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Old 20th November 2009, 11:40 AM   #41
mymindinside is offline mymindinside  India
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will post results, was hoping to get them done today but couldn't get the tools in time. plan to do it tomorrow.
i think thats how much an entire sheet (8ftx4ft) of ply costs here
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Old 23rd November 2009, 12:22 PM   #42
mymindinside is offline mymindinside  India
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Finally managed to finish up my build today.

all glued up and set but no finish yet and so i didn't solder the drivers and the binding posts. wanted to listen to them though so just twisted the wire (single wire of cat6) around the driver and binding post terminals. terrible, i know, but i figured the sound would only improve once i had everything soldered together nicely. the amplification was whatever i could get my hands on, a cd/fm/tape player combo amplifier (again, it can only get better right?). speaker cable was 18ga. lamp wire (zip cord)

initial impressions were extremely positive, very clear and transparent. they image beautifully and disappear once you press play. i haven't damped the internal chamber yet, have some felt on hand but wanted to listen without it first. i did detect a little bit of shoutiness though,..a slight roughness in the upper mids. i think the solution to this is phase plugs...would lining the back chamber with felt help this?

what surprised me was that they handled rock and electronica without skipping a beat. what struck me was that the speakers were very rhythmic and had great timing. they sounded better as i moved further away, and i fear that i might lose out because my room will force me to be close-ish to them.

a big thanks to the designers..and to everyone for all the help... i think i might build another one for the living room!.

have put up some photos of the speakers as they looked today

cheers
mymindinside
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File Type: jpg Sachiko Build Photos - 33.jpg (30.6 KB, 695 views)
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Old 23rd November 2009, 03:06 PM   #43
Pit Hinder is offline Pit Hinder  Germany
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Congratulations! And don´t worry - the "shoutiness" will lessen when the drivers are broken in. This might take quite a few hours of enjoying music - what horrible fate.
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Old 23rd November 2009, 05:36 PM   #44
planet10 is online now planet10  Canada
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Sachiko Builld Thread
Electronics, cable, solder, and damping will all make for improvements, but they will still need some running in, 100 hrs gets you thru the worst of it.

dave
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Old 24th November 2009, 04:57 PM   #45
doug20 is offline doug20  United States
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Very nice build!

In a design like this what is the max SPL of the speaker?
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Old 24th November 2009, 06:29 PM   #46
just a guy is offline just a guy  Canada
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Quote:
Originally Posted by doug20 View Post
Very nice build!

In a design like this what is the max SPL of the speaker?
This is just a guess, but I'd think you would get about 96 db in 2 pi space within xmax. After that it would sound increasingly distorted but you could probably get at least 103 db (I don't know the xlim spec so it could be a lot more) before something breaks.

Last edited by just a guy; 24th November 2009 at 06:32 PM.
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Old 24th November 2009, 07:20 PM   #47
planet10 is online now planet10  Canada
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Quote:
Originally Posted by just a guy View Post

at least 103 db
At least. Fostex xMax specs seem to be quite conservation, and they are capable of much higher excursions before runnung out. I'd expect they can close in on 110 dB.

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Old 24th November 2009, 09:54 PM   #48
Scottmoose is offline Scottmoose  United Kingdom
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You'd need to go some to break Fostex units; suspension is progressive rate, so you'd likely fry the VC before sending the cones flying. Depends on listening distance, but in practice, figure on about 105dB 1m at Xmax, with plenty more if you're willing to accept a bit of compression (the 206 overloads fairly gracefully). Do yourself a favour though & don't try it on a regular basis. Over 85dB continuous causes hearing damage in the long term.
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Last edited by Scottmoose; 24th November 2009 at 10:02 PM.
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Old 25th November 2009, 04:51 AM   #49
quadtech is offline quadtech  India
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Just saw the latest pics. Looking very nice. Congrats!
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Old 25th November 2009, 03:04 PM   #50
just a guy is offline just a guy  Canada
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Quote:
Originally Posted by Scottmoose View Post
...about 105dB 1m at Xmax...
Ouch, my guess was way off. I guess I should be modelling and not guessing.

I think I should get off my lazy butt and build a pair already anyway. I've been talking about it for over a year and I've got drivers.
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