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-   -   K.I.S.S - CHR70 Project (http://www.diyaudio.com/forums/full-range/172514-k-i-s-s-chr70-project.html)

thunk303 25th August 2010 02:17 PM

K.I.S.S - CHR70 Project
 
4 Attachment(s)
This would have to be in the running for one of the easiest projects ever!!

Parts List: All prices in AUD
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1 x CHR70v2 (Pair) = $128.00
1 x Dayton DTA-2 Class T Digital Amp = $39.00
1 x 12v x 2amp Regulated Plug Pack = $21.00
1 x Postage = $12.00

2 x 1m x 90mm plumbers pipe = $11.00
2 x 90mm T-pieces = $4.30
2 x 90mm 90 degree bends = $2.98
2 x 90mm end caps = $2.40
2 x 100mm to 150mm Toilet thingies = $24.00

1 x 50cm x 1.2m x 12mm ply = $14.00
1 x Clip lock plastic Container = $3.00
1 x 20 Liter bag of Insulation = $8.00

2 x House Brick = FREE

Grand Total Cost = $269.68
Grand Total Time = 4 hours :D
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I cant recommend these enough for first time speaker builders looking to get big rewards with very little skill or effort actually required. And if you already have an amp you'll save 50 odd bucks.

The list of modifications are also endless in terms of tuning the transmission line or even making them look purdy :worship: for the loved ones (mine are hiding in the bedroom as desk side units forever!)

The Sound.... Just get some and do it. They wont replace a big rig but they will surprise your pants off with what they do do.

Enough bass, awesome mids and great highs but most importantly, smooth and clean, you can listen all day.

I'll leave it at that for the moment but I do encourage any feedback or advice as a record for future builders and my own upgrades.

I will also add more build tips shortly.

Have fun
Dean

planet10 25th August 2010 04:32 PM

I love plumbing pipe speakers.

A note to those who want to try: fatter pipe is probably better. I used 100mm (4") pipe on my Alpair5 TLs (haven't stuffed and fired them up yet)

http://www.diyaudio.com/forums/attac...a5-tl-comp.jpg

Even simplier is to put the CHR into 5-7 litre sealed.

dave

thunk303 26th August 2010 02:46 AM

Hey Dave.

I might try the 100mm pipe and see how that sounds. (No rush, the 90mm works a treat)

I noticed you Enabled your drivers. Do you have a pattern for the CHR70. If so, what do i need to do to get it :)

Cheers for the input.

Dean

planet10 26th August 2010 03:07 AM

The Pattern is the standard one... ring placement can be seen in any of the pictures of a done up CHR-70. Do you have the kit from Ed?

For the CHR i'd probably dig into my collection of 6" pipe.

dave

thunk303 26th August 2010 09:23 AM

Haven't enabled any drivers before so i might have to spring for the kit.. How do I contact ed?

15cm?!? Didn't MJK recommend 1.3 x SD?? I'll double check that.... Whats your reasoning for the larger pipe Dave? Vas or?
Will the size increase mean better bass?

Are your photos of the Alpair 5's or CHR's?

Dean

aptquark 26th August 2010 09:48 AM

This is cool.

thunk303 26th August 2010 12:13 PM

One of the biggest surprises from this adventure is the Dayton DTA-2 Class T Digital Amp.

It sounds allot better and produces more volume with the right speakers than it has any right to.. I think i'll have to explore this class T malarkey a little further. Can anybody recommend the next step on the T path?

Dean

Andrewbee 26th August 2010 02:07 PM

IMHO T amps sound quality starts with the 2020 then move to the TC2001+TP2050 (which I believe you currently have) and end with the 3020.

planet10 26th August 2010 03:22 PM

Quote:

Originally Posted by thunk303 (Post 2284150)
Haven't enabled any drivers before so i might have to spring for the kit.. How do I contact ed?

http://www.diyaudio.com/forums/swap-...0&pagenumber=1

Quote:

15cm?!? Didn't MJK recommend 1.3 x SD?? I'll double check that.... Whats your reasoning for the larger pipe Dave? Vas or?
Will the size increase mean better bass?
Sd actually has nothing to do with getting the pipe size right, it is Vas. Even so, MJK recommendeds that 3x Sd is a good starting point.

Quote:

Are your photos of the Alpair 5's or CHR's?
Alpair 5

dave

thunk303 22nd June 2012 01:57 PM

3 Attachment(s)
Just thought I would show a little update on my CHR-70 TL Pipe.

No real design here other than following a few simple TL rules.

Paint job or some sort of covering due in the near future.

I have still also added a Fontek ribbon to the top of each pipe shooting straight up and crossed over at 10k with an L-PAD.


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