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pwarren3030
(@pwarren3030)
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Joined: 11 months ago
Posts: 23
03/09/2019 8:39 am  

so i started this project. its not my first project. I used to muck around with diy stereo 40 something years ago. 

Anyhow Trawling youtube has reignited my interest. 

To make the best sound system that can be shoehorned into a 1 cubic foot plastic milkcrate. If you go to the Introduce Yourself forum New member Peter from Sydney you can get the gyst of how I've started.

There's even a link to the video I've started to record the project. Works on your google drive account.

Anyhow I need your help. I ordered 2 really cheap horn tweeters from Banggood. They claim up to 30khz and 100 watts. I expect they'll be loud and screechy with not much depth in the mid. Here's a link

https://banggood.app.link/xhH4l11iGZ

Seeking recos for good budget horn tweeters that will fit in a box 90x100x300 mm outside dimensions. They must ship to Australia. I'll keep you posted. Thanks ahead.


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pwarren3030
(@pwarren3030)
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16/09/2019 6:20 pm  

Just hoping to boost my query since no body replied.

Any recos for horn tweeters. ???????


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TVOR-Ceasar
(@tvor-ceasar)
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Posts: 385
16/09/2019 8:17 pm  

All I can say is that the piezo will work, but more than likely will be as you said, a bit on the shrill side. Most are in the 90+ dB range. I know the price is extremely attractive, but you might want to spend just a bit more and get something with a real diaphragm and driver coil. Some may still be excessive, but you'll find more often than not that the majority of them are much more detailed and easier on the ears.

I'd suggest looking at Parts Express to get an idea of what to look for, then scour other sites that would be a better buy for you. 

Like I said in your "About" thread, I haven't bought horns in many years, and those were cheap Radio Shack piezo horns. Wish I could be of more help. 

-Charlie


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pwarren3030
(@pwarren3030)
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Posts: 23
17/09/2019 6:29 am  

Thanks Charlie, there's a lot of hype on youtube about Klipsch speakers with their horn tweeters. Probably key to their performance is a high quality driver behind the horn. Hoping someone can reco a good one.


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bjaurelio
(@bjaurelio)
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Joined: 11 months ago
Posts: 56
23/09/2019 11:41 am  

@pwarren3030

You could try DIY Sound Group. I don't know if they deliver to Australia, but you will find commonly recommended compression drivers. I'm certain there has to be a source for the SEOS waveguides in Australia. I think Red Spade Audio is based in Australia, but it may only be articles. It's probably a good resource for finding local suppliers in Australia for compression drivers and waveguides. 


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pwarren3030
(@pwarren3030)
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20/10/2019 6:29 am  

Quick update. I accidentally bought the amp without bluetooth. So I had to buy a separate BT receiver. Ugh. Only one benefit, it came with a remote. Hmmm not sure how helpful it is since volume and track selection can be controlled from a phone. It also has a USB and a micro memory card input which could be useful. 

A little setback. I was working on it on my verandah and a big storm caused some water damage to the woofer cabinet. 

Now bought RCA socket cable to 3.5mm plug for the BT receiver instead of male RCA plugs. Grrrr.

Also bought a cheap soldering iron to solder the speaker cables. Should be fun. I haven't soldered for over 40 years.

Ill let you know how it turns out.

 


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123Toid
(@123toid)
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21/10/2019 11:59 pm  

@pwarren3030

I'm excited to see this. Which tweeter did you end up going with? 


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pwarren3030
(@pwarren3030)
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01/01/2020 3:29 am  

@123toid

Hi Toids,

I finally got this working today. It needs tweeking. The $3 tweeters as expected are very bright and lacking midrange but great detail in the upper frequencies. and I'm getting distortion at medium volume from the woofer. Pleased with the Fosi amplifier and the BT receiver. I'll post some photos tomorrow. Cheers from Australia.

 


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123Toid
(@123toid)
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02/01/2020 12:13 pm  

@pwarren3030

I can't wait to see the pictures!  Would increasing the order or putting a zobel or tank cap on the woofer crossover help out your woofer distortion?


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pwarren3030
(@pwarren3030)
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02/01/2020 10:54 pm  
See attached photos. First thing I'll do to address woofer distortion
is shorten the port. Its currently about 175mm long.
I thought I'd start long and reduce it to see what differencit mafe
Would that be a cause? Charlie I think it was calculated
the length for me. Was meant to be only 50mm or so.
I'll have to find the thread.
AAD14AB1 618C 4727 97E3 F2CDA6DA9D5B
9E4FCCD1 37DB 4057 9C48 57BE6D3E4A76
CC30DF3E AA96 4542 860F 27F5D7C9F579
A0AF7A1C CE42 4E09 A06F CFC38BCECBC5
0D4C2BE8 F022 4953 AED1 C1469B229820
2FE2F093 DA08 48D7 94C7 279452F44F4C
A2F00E33 1E8B 4F8A 9E1D FC73E8B89032
A8843184 AF29 427F A733 810AFB81E8C5
A13F094F 5E72 4F60 84A3 AAD07B489500
AAD14AB1 618C 4727 97E3 F2CDA6DA9D5B
9E4FCCD1 37DB 4057 9C48 57BE6D3E4A76
CC30DF3E AA96 4542 860F 27F5D7C9F579

 


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123Toid
(@123toid)
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02/01/2020 11:56 pm  

@pwarren3030

What an awesome idea.  The milkcrate makes it so portable.  I love it!  Really cool idea!


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TVOR-Ceasar
(@tvor-ceasar)
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03/01/2020 10:03 am  

Quick question - the distortion you hear, is it present if you remove the sub from the crate? Just trying to narrow down the possibilities.

Yes, it was me who came up with the port lengths. From your "About" post on Sept. 3:

*****

Okay, finally got the chance to run the numbers:

Box will be tuned to 54Hz

32mm D x 35mm L

40mm D x 54mm L

50mm D x 113mm L

Any of these will fit comfortably inside the box.

*****

And you said you were going with the 32mm port. 175 mm is the 5th multiple, but it's definitely too long.

 

As an aside, I use a store bought 2.1 setup for when we work on the weekends. It is intended for desktops and USB powered. I bought a couple of 2100 mAh battery banks and a cheap Bluetooth dongle from Walmart, and it lasts a long time, All told, probably about $35 invested. Next up I am going to use some wood from an old Victrola Case that had to be knocked apart to make a platform with cloth hold-downs for everything to make it more convenient to transport.

-Charlie


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pwarren3030
(@pwarren3030)
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Posts: 23
05/01/2020 2:35 am  

I’m away atm. Ill take it out of the crate to test your theory. If thats not it, Ill cut down the port. 

If anyone can suggest a good tweeter with some mid frequency I’ll invest in some decent tweeters. Thinking Scanspeak or similar. Happy to consider soft dome, silk dome. 


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DapperDanimal
(@dapperdanimal)
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Joined: 8 months ago
Posts: 15
27/01/2020 11:47 pm  

Would you consider AMT ribbon tweeters? They cost an order of magnitude more than $3 but as I understand it they have less distortion and often a wider range. I’m new to this so if it’s a bad idea let me know why!

Cheers,

-Dan


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