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The Christiansen "DG" 300B Amplifier Build Thread - Page 38

post #556 of 632

These panels are supposedly quite good as well. $30 at Home Cheapo.  I strongly suspect they're the same material as the Pro panels which are pretty well spec'ed.

 

~Tom

post #557 of 632
Thread Starter 

My speakers are 89" c-to-c and the face is 28" off the wall.

I'm at max cable length.  I am putting off buying new, but I will have to because I want the amp next to or in front of the sofa.  The good news is I won't need a long headphone cable in this position.

 

Thanks for the sound panel referrals.  The price is indeed much better, however the Sonex have a HPC coating to make cleaning easier.

I kinda like that. I need to find a guide for panel spacing.  I'm estimating 8" apart. 2' x 2' or 2' x 4" covering 10' behind the sofa.  Not that the room sounds bad, but I think your idea will be a nice upgrade.  The vaulted ceiling helps too.

post #558 of 632

Before you spend megabucks on sound treatment, try hanging a heavy rug behind the couch. I've been known to prop up a sleeping bag and a down comforter on a pair of hockey sticks to experiment with various reflection mitigations. See if it makes a difference.

 

There are basically two approaches: You can stuff the room such that reflections don't happen. Or you can position yourself and your speakers such that your ear/brain combo doesn't perceive the reflections. Usually you want some combination of these two extremes. In most cases you can get good results by just having a few rugs on the walls and some furniture around.

 

~Tom

post #559 of 632
Thread Starter 
Quote:
Originally Posted by tomchr View Post
 

Before you spend megabucks on sound treatment, try hanging a heavy rug behind the couch. I've been known to prop up a sleeping bag and a down comforter on a pair of hockey sticks to experiment with various reflection mitigations. See if it makes a difference.

 

There are basically two approaches: You can stuff the room such that reflections don't happen. Or you can position yourself and your speakers such that your ear/brain combo doesn't perceive the reflections. Usually you want some combination of these two extremes. In most cases you can get good results by just having a few rugs on the walls and some furniture around.

 

~Tom

I have an oriental rug someplace.  I was looking to do that a couple weeks before posting.

I just stumbled upon these.

 

Aesthetics in this room is important to me.  I don't want to just put stuff in the room.  Didn't really love the cmc foam either.

 

This product descriptin  really caught my eye (ear)

 

The Auralex WaveLens scatters and redirects acoustical energy and can be an effective alternative to absorbing reflections. The WaveLens can be beneficial in numerous applications: creating a “large sound” in a small room, optimizing absorption panels by redirecting energy so that they are more efficient, or using the acoustical properties of an adjacent space to enhance your listening or recording environment. The WaveLens is sized to drop into a suspended ceiling grid or can be installed using the supplied mechanical fasteners.

 

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 100CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 100CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 100


Edited by sceleratus - 11/8/13 at 10:22am
post #560 of 632

A nice rug would really tie that room together. 

 

As an idea - have you considered getting sound-foam and putting it in a frame with a colorful border? Its not a sound absorption panel, its modern art. WAF of room treatments can be pretty high, if you do it well. 


Edited by nikongod - 11/8/13 at 10:26am
post #561 of 632
Thread Starter 
Quote:
Originally Posted by nikongod View Post
 

A nice rug would really tie that room together. 

 

As an idea - have you considered getting sound-foam and putting it in a frame with a colorful border? Its not a sound absorption panel, its modern art. WAF of room treatments can be pretty high, if you do it well. 

The bamboo product also have these panels with circular cutouts that go in front of acoustic squares.   Overall, I really like the wood concept.  I don't know if I'd benefit more from absorption or diffusion.

 

post #562 of 632

I'm not sure if you need absorption or diffusion either, mostly just saying that although these are very utilitarian things there is no reason not to spice it up a bit. 

post #563 of 632
Thread Starter 

Here's a thought for the wood look....

Stack these at various heights... Might be cheaper.

EDIT:  It's not..

 

 


Edited by sceleratus - 11/8/13 at 11:18am
post #564 of 632

Diffusers are pretty easy to build. As are absorbers. For the 3D diffusers, just use one of the programs/websites available for calculating the lengths and sequence of the wood blocks.

 

http://www.diyaudio.com/forums/construction-tips/232178-how-make-diy-acoustic-panels.html

 

~Tom

post #565 of 632
Thread Starter 

very cool

 

I was just looking into making something.

 

What freq. do I want to diffuse?

The software has you set the value.

post #566 of 632

See post #7 in the DIY Audio thread I link to above. 

 

~Tom

post #567 of 632
Thread Starter 
Quote:
Originally Posted by tomchr View Post
 

See post #7 in the DIY Audio thread I link to above. 

 

~Tom

I've been using the software, but I'm not sure what "design" freq. to plug in.

I thought about cutting bamboo stalks into the specified lengths and bonding them together.

 

 

post #568 of 632

I really don't know. I suggest looking at the documentation for the software. You may also be able to find a thread by someone who uses the software. You can also try to model a commercially available panel to see what they're designed for. 

My experience with room acoustics is limited to what I can measure and solve by moving the speakers and furniture around. I've never designed a diffuser. 

 

~Tom


Edited by tomchr - 11/8/13 at 7:56pm
post #569 of 632
Thread Starter 

Tom,

Just ordered the Goertz  MI 1 Center Stage speaker cable and 2' x 2' x 3" acoustic panels from The Home Depot.

I appreciate the advice.

 

 

As you pointed out Goertz, is one of the few speaker cable companies that publishes specifications for resistance, capacitance, and inductance.  That's where the rubber meets the road.  I kept going back to the article you sent.  Although Goertz is more expensive, I justify the MI 1 because I don't know the specifications of, say, AudioQuest X-2 bulk cable. At half the cost I was strongly considering this cable.  However, if it has the same specs as Home Depot zip line, I'm wasting $200.

 

The other wire/cable I was considering was "AntiCable"  (Magnet Wire)   This is what you ran in the simulation against Goertz.

 

Tom's simulation Goertz "MI 2" vs AntiCable using the specifications published by "AntiCable": 

 

AntiCable Level 2 Reference Series Speaker Wire Electrical Specifications ($6/ft.)

Resistance = 0.0032 Ohms/foot run
Inductance = 0.0003mH/foot run  (300 nH)
Capacitance = 0.048nF/foot run

AntiCable Level 3 Reference Series Speaker Wire Electrical Specifications ($18/ft.)

Resistance = 0.0016 Ohms/foot run
Inductance = 0.00026mH/foot run  (260 nH)
Capacitance = 0.044nF/foot run

Goertz MI 2 Veracity ($14/ft)

Resistance = 0.0022 ohms/ft
Capacitance = 0.95nF/ft
Inductance6nH/ft

Goertz MI 1 Center Stage   ($8/ft)  This is the cable I purchased

Resistance = 0.0044 ohms/ft  
Capacitance = 0.5nF/ft 
Inductance = 10nH/ft 

 

post #570 of 632

Hey!

 

I have Goertz cables in my stereo set. I had already forgotten the name:D

 

Awesome thread btw. and really gorgeous piece of gear that you've build!

 

I started listening a lot more with headphones after I moved and realized my room acoustics went south so it got tiring to listen for a longer periods.

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