Building custom and flexible audio system || Part 2

First part seems to be damaged so i'll start seperate topic for Part 2 of the project.

Many of you probably thought that this project has failed. Actually the truth is the project is running but slowly due to lack of time and money ^^. This time something special for you than just drawings and theory

I just place them standing still with no screws (which i havent choosed yet anyway). Material is 22mm MDF (Medium Density Fiberboard), overall structure weight so far is about 10kg.

Another change in the project is the speaker itself. I decided to go for a much better one - Pioneer TS-W101SPL member of Pioneers professional drives (SPL class - Sound Preasure Level); 600W RMS; 18-2500Hz

Particullary for the subwoofer, i concider using it both in home and in car (for vacations). Power is important to me because i dont want to have lack of power which usually happens at verry low frequencies. As for the MDF, well its often used to make furniture - this one is the same it just dont have the shiny plastic cover creating the illusion of big piece of wood. I think there will be needed one pre-amplifier (EQ) to split the signal. My plan is to split it in two - one part of the signal will go to 2x120W amplifier and following speakers. Those will be for the stereo and the amplifier or pre-amp will cut-off frequencies bellow 150Hz. The other signal coming from the pre-amplifier will go to 2 channel (in bridge mode) or 1 channel amplifier with power around 600W plus high frequencies cut-off filter to remove all frequencies above 150Hz. Most expensive thing of all might be the pre-amplifier itself, so far i havent seen a cheap one that would do the work ...

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Medium-density fiberboard (MDF or MDFB) is an engineered wood product formed by breaking down softwood into wood fibers, often in a defibrator, combining it with wax and resin, and forming panels by applying high temperature and pressure. It is a building material similar in application to plywood but made up of separated fibers, not wood veneers. It is denser than normal particle board.

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MDF is a wood product created by breaking down a softwood into a powder, which is then mixed with wax and resin. The final finish is created by submitting the boards to high pressure and temperatures.

In Australia the main species of tree used for MDF is plantation-grown radiata pine. However a variety of other products have also been used including other woods, waste paper and fibers.

The trees are debarked after being cut. The bark can be sold for use in landscaping, or burned in on-site furnaces. The debarked logs are sent to the MDF plant where they go though the chipping process. A typical disk chipper contains 4-16 blades. Any resulting chips that are too large may be re-chipped; undersized chips may be used as fuel. All chips are then washed and checked for defects.

The chips are then compacted using a screwfeeder, and will be heated for 30-120 seconds to soften the wood; they are then fed into a defibrator which maintains high pressure and temperature. The pulp that exits from the defibrator is fine, fluffy, and light in weight and in colour.

From the defibrator the pulp enters a blow line where it is joined with wax (to improve moisture resistance) and resin (to stop the pulp from forming bundles). The material expands in size and is then heated by heating coils. When it comes out it may be stored in bins for an indefinite length of time.

After this drying period the board goes through a "Pendistor" process which creates 230-610 mm thick boards. Then it is cut and continues to the press. Here it is pressed for a few minutes, to make a stronger and denser board.

After pressing MDF is cooled in a star dryer, trimmed and sanded. In certain applications boards are also laminated for extra strength.

The Environmental Impact of MDF has greatly improved over the years. Today many MDF boards are made from a variety of materials. These include other woods, scrap, recycled paper, bamboo, carbon fibers and polymers, steel, glass, forest thinning and sawmill off-cuts.

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due to financial reasons i decided to go for something different - neither the first drive i show you - TS-W256DVC, neither the one after - TS-W101SPL but something in the middle and as a plus - it will be 12" drive

[url=http://www.pioneerelectronics.com/pna/v3/pg/product/details/0,,2076_310069927_376262748_tab=B,00.html?compName=PNA_V3_ProductDetailsComponent]Pioneer TS-W307D4[/url]

I still stick to DVC (Dual voice coil) drive. In addition i also purchased the grill for this model. It gonna look like that

[url=http://www.pioneerelectronics.com/pna/v3/pg/product/image/popup/0,,2076_414827940_415128386,00.html ]Gallery[/url]

I came up with idea to put same type of light like in my PC case inside the subwoofer - green cold cathod light, placed in such a way so in-directional light will come out from the bass reflecs tube.

This is part of the cherry. I keep working on it

The last one shows the 4 silver connectors (2 per Voice Coil) Notice the Creative subwoofer in the background behind the speaker (looks small despite the 6.5" drive)

I cutted the speaker hole already, professional reflex tube (80mm diameter, 225mm long dual flared ports) is here too. I need to cut hole for it and rear terminal which i havent bought yet. Also i need about 2m good cables only for inside of the sub.

I havent wrote anything nearly two weeks and i think its time to reveal more new info.

I have put some hard work last few days and subwoofer is verry close to complition. There will be used 28 wooden screws completely hidden (particially in one wall, particially in another wall of the box) + 9 of the bottom of the box where simple screws for wood will be used (a metal ones) with the idea to be able to remove the bottom if nesseccery in future, 8 holes for speaker screws, 4 - for speaker terminal at the back. Talking about the terminal, its from Visaton (a german company) with gold plated connectors and bridges (it includes two external bridges to change speaker's coils mode). In total there are over 60 holes been positioned and drilled for this purpose. I already bought the silicone which is going to be used for isolation of the internal edges. Sound isolation and half of the wooden screws will be available soon aswell. Paint is already here - black glance. I'm also preparing small exotic logo made from metal as a batch to place infront of the subwoofer thanks to a laser cutting machine.

Just finished with the design of the logo

... silence, before a storm ...

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