2.1 Amps!??? Arghhh

[von Ah]

One may also consider using two of these, one in each FAST cabinet designed to work with the plate's crossovers... Might be a tad wasteful, but the convenience factor may be worth it to just quickly get up and running.

 

[Colin]

I always liked the idea of this commercial system, which uses a similar 2.1 amp idea:

http://www.avihifi.co.uk/neutron.html

PS What is a FAST cabinet?

 

[von Ah]

FAST implies using a wide-band driver with a helper bass driver, crossed relatively low for 2-way operation. Many have used full range drivers on a narrow baffle with larger woofers mounted on the side(s) for low end support.
The acronym has no agreed-upon translation to multiple words.

 

[chrisb]

FAST implies using a wide-band driver with a helper bass driver, crossed relatively low for 2-way operation. Many have used full range drivers on a narrow baffle with larger woofers mounted on the side(s) for low end support.
The acronym has no agreed-upon translation to multiple words.

none that will pass the forum censors, but working in trade, you could probably deduce the first 2

 

[Colin]

Many thanks. Good approach.

 

[sreten]

Hi, FAST = Full range ASsisTed, and is more 2.2 than 2.1, rgds, sreten.

 

[Bill poster]

Here's a quick rendering of a design I'm working on (need to adjust the shape a bit) for a 2.1 system using full range drivers/sub with active plate amp. The sub(not shown) will be sealed and can be used as a coffee table.

 

[chrisb]

View attachment 304494

Here's a quick rendering of a design I'm working on (need to adjust the shape a bit); these are floor standing sats for a 2.1 system with active plate amp. The sub(not shown) will be sealed and can be used as a coffee table.

gonna include an array of up-firing high intensity LEDs for mood lighting?

 

[Bill poster]

haha, nice idea. I think I'll just stick to them just being speakers, bitten off enough just having to make the moulds for these puppies

 

[Colin]

That's a very elegant, B&O-ish design.

Have you seen this cabinet for the JX92 - it's not as neat but has a similar reflector

hifisound eShop   -  E.J.JORDAN ROUND ABOUND KOMPLETT-BAUSATZ MIT PU-KEGEL  

 

[Bill poster]

Thanks Colin, I haven't seen that design; is it german? Here's a rough render of the sub/coffee table. Wd probably need to isolate the top from the main cabinet. I'd put the 2.1 plate amp on the underside with the woofer so then have to move the controls off the amp and mount them somewhere. Also want to add an iPod dock with dac

 

[jameshillj]

Sorry to "rain on your parade" but you're going to meet some difficulties trying to mate up that omni directional speaker to any sort of subwoofer located in a coffee table that's Xed over at 150Hz, particularly with a 2.1 plate amp - neat little design tho.

 

[Bill poster]

Thanks for the compliment. Yes thats an issue with the Dayton, a fixed high pass of 150 hz(2nd order). I would have thought that the actual x/o point is lower( where the 2 slopes meet) and can be adjusted down to 120hz or more?
The Keiga 2.1 has adjustable hi/lo pass.

 

[Colin]

XAMP-M1 and M2 used in combination will be more flexible and give you variable crossover points

Audio Amps/Crossovers : Xkitz Electronics, Electronic Kits, Fun Educational Electronic Projects

I believe some AV receivers have adjustable roll off for the subwoofer outputs.

 

[jdelange]

Reflector shape

View attachment 304494

Here's a quick rendering of a design I'm working on (need to adjust the shape a bit) for a 2.1 system using full range drivers/sub with active plate amp. The sub(not shown) will be sealed and can be used as a coffee table.

Bit late, but you may want to change your reflector shape from hyperbolic (curved) to conical (straight). This was studied by the German magazine Hobby Hifi 3/2011 (still available on back order). The reflected SPL of the conical shape looks (= sounds) rather bad.

Jan