BroadBand Bass Trap's Build - Page 6 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #51 of 175 Old 01-25-09, 05:25 AM Thread Starter
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Re: BroadBand Bass Trap's Build

Yes A very handy piece of gear but very messy and very very Dangerous like all planers.....

FWIW That Ryobi Surface planer was made in 1995 when Ryobi was OK but all the new Ryobi stuff is mostly rubbish now IMO, Disposable power tools ......

Cheers....
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post #52 of 175 Old 01-25-09, 04:06 PM
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Re: BroadBand Bass Trap's Build

"They don't make 'em like they used to"..

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post #53 of 175 Old 01-27-09, 05:04 AM
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Re: BroadBand Bass Trap's Build

Unfortunately it's not just Ryobi.
I have a mate who repairs power tools and he recommends buying old tools >10yo and repairing them.
You name the brand & there is a 90% chance it isn't made to last more than its warranty plus 1 day.
There are still a few good ones out there if you look hard enough! and are willing to pay.

Personally I hate the fact that the rest are just going to end up as toxic landfill..........
my 2c
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post #54 of 175 Old 01-27-09, 07:39 AM Thread Starter
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Re: BroadBand Bass Trap's Build

Yes I agree with your mate as far as the older Ryobi stuff being good quality, But The problem being that A lot of the parts for 10y + Ryobi power tools are No Longer Available Thus can't be repaired unless you custom make the parts needed...

FWIW I to used to Repair all heavy industrial and power Tools inc Electrical rewinds IE: Remanufacturing/ Rewinding Armatures, Stators and more in house for over 10 years....

Unfortunatly these cheap Chinese manufactured power tools are now disposable items, It costs more to repair these tools than replace which is what Ryobi/ Black&Decker (dewalt), to name A few do for warranty claims ....

Cheers....
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post #55 of 175 Old 01-31-09, 04:20 AM Thread Starter
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Re: BroadBand Bass Trap's Build

I have finnished making my larger 4ft flutter Echo Diffusors 8 in total 4 per side, Just need to stain the frames and put the gloss coat on the Diffusors and frame.....
More to come....

Cheers...
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post #56 of 175 Old 01-31-09, 03:40 PM
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Re: BroadBand Bass Trap's Build

They're going to look pretty cool when their set up in you room!!

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post #57 of 175 Old 02-01-09, 12:10 AM Thread Starter
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Re: BroadBand Bass Trap's Build

Yes Prof I am hopping they will look good, But as noted they are A nightmare to make...

FWIW I have been talking to Doug Plumb of Acoustisoft.com about the Excellent RplusD Room Acoustic measurement software (Ethan of real traps uses it) so I can optimize my room Acoustics, this includes speaker placement, EQ Subwoofers and "Room treatment placement" & much more....

I am going to "cheat" and use his 1 on 1 Consultation package, I figure that it would be better to use his knowledge & Expertise for the best result rather than me having to learn how to analyze & interpret what the Data is telling me + I am A very impatient person when it comes to this stuff so that works against me also...


Has any one here used this High End room Acoustic software ?....

Cheers....

Last edited by cinema mad; 02-01-09 at 12:47 AM. Reason: added more..
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post #58 of 175 Old 02-01-09, 01:10 PM
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Re: BroadBand Bass Trap's Build

This is an interesting thread. I have read it several times now.

What frequency range are you diffusing with these?
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post #59 of 175 Old 02-01-09, 09:31 PM Thread Starter
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Re: BroadBand Bass Trap's Build

Hi Fred & thanks for your post ,

This type of QRD Diffusor's coefficient range is usefull between - 3500hz --- + 20000hz..
If you mount these Diffusors with A space and air cavity combined with Semi riged fiberglass, absorbtion below the Diffraction limit can be achieved.....

Because the Well depth is only small they can be placed closer to the listner which is the biggest plus as compared to QRD Diffusors with 6" deep or deeper wells....

The Down side to this Diffusor is its smaller Diffusive frequency range as compared to A BroadBand Diffusor such as the type I will build later down the track....

Cheers....
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post #60 of 175 Old 02-02-09, 10:26 PM
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Re: BroadBand Bass Trap's Build

Thanks Jason. I suspected that it would be higher in frequency. I would like to try some diffusion at the first reflection points on the side walls and this looked like a possible candidate. I think that with the smaller wells, they could look quite elegant.

I need to go back and re-read that section of the Master Handbook.
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