DIY Speaker Filling Suggestions

Not too haarmful if you know what you are doing..
Poly fill is another option. Partsexpress has them and is most commonly used in the US.

I would still prefer glass wool. Just put on long sleeved shirts, gloves and goggles and yeha don't forget the gas mask .
If it is going to be vented, then you would want to make sure you seal up the port from the inside with speaker grill cloth, assuming that you go with glass wool. This is to prevent the wool from being blown out of the port and into the air you breathe.
Anything else, then this is not needed.

Savyasaachi schrieb:

Not too haarmful if you know what you are doing.. Poly fill is another option. Partsexpress has them and is most commonly used in the US. I would still prefer glass wool. Just put on long sleeved shirts, gloves and goggles and yeha don't forget the gas mask . If it is going to be vented, then you would want to make sure you seal up the port from the inside with speaker grill cloth, assuming that you go with glass wool. This is to prevent the wool from being blown out of the port and into the air you breathe. Anything else, then this is not needed.

Thanks Savyasaachi! But I have to keep this option as last resort. The Misses is prone to allergy!

the Reliance "Racron" material used to make pillows....I'm told that works....

Manek.

Polyester fiber fills are available at most of the furnishing material shops, the place where they sell PU/Rubber foam, vinyl leather cloths etc. Polyester fiber is available in loose form as well as sheets.

Anil

Manek schrieb:

the Reliance "Racron" material used to make pillows....I'm told that works.... Manek.

ani schrieb:

Polyester fiber fills are available at most of the furnishing material shops, the place where they sell PU/Rubber foam, vinyl leather cloths etc. Polyester fiber is available in loose form as well as sheets. Anil

Thanks Guys. I will use one of the two.

vjcritic schrieb:

Thanks Savyasaachi! But I have to keep this option as last resort. The Misses is prone to allergy!

Vj, I myself have been a victim of allergy, wheezing and asthma since the age of 6. So is my dad. CAn you believe that he doesn't allow me to put a carpet in the audio room because of that but allowed me to use glass wool in the speaker. I have had no problems whatsoever with this. I used resin glue along with speaker grill cloth to seal off the port from the inside. Worked like a charm for me. Just make sure you do it in an open space and with proper prote4ctive gear. It is most harmful while handling it but not when it is inside a speaker box. Use fevicol or resin glue on the inside walls to make the glass wool stick.

I only stress on glass wool because it will surely work wonders and the amount needed to damp as well is less compared to any other material.

vjcritic schrieb:

Hi, I have just started planning my first DIY speaker. Can someone here please suggest some alternatives for 3/4" poly-fluff batting. There is fiber glass but I have heard that it might be harmful to handle. I am specifically looking for things we can get here in India. All suggestions will be greatly appreciated! Thanks. VJ

Use a surgical mask and glove while handling fiber glass. It is easy and will over in a minute. Make sure to wrap the fiber glass in a wooden frame with cloth cover...so that fiber glass will remain in its place for years to come.

I have used a material to line the inside of speaker cabinet in all my car audio installations & it works very well. It is made in Germany & sold in India by Wuerth. I can look up the details and let you know. It is a sound deadning butamine based material. Reduces cabinet colouration to a great extent. I hope I have not shot off the topic.

How abt cotton wool-a mini razai, hmm?
I understand Cadence started off with an anehoic chamber lined with-cotton pillows!

Kamal schrieb:

How abt cotton wool-a mini razai, hmm? I understand Cadence started off with an anehoic chamber lined with-cotton pillows!

Cotton Pillow ?

When I saw it [the A Chamber i.e.] It had pillow like things for sure, but the material was not cotton !!! It was a mix of 3 or more materials. They would not give further details !!!
Have you been inside an A C ever ? It is the most horrific feeling I have ever experianced in my life. Mad !!!

Bhagwan..the Anechoic chamber feeling is very odd. no echoes...suddenly your voice sounds so different.....somehow i felt an additional pressure on my ears whilst in there....I wonder what that was about though ?

And the biggest worry...!what if the door shuts and no one notices ????

Well, this is what I read a long time back in an article reporting at the time Cadence was set up.
Anechoic chambers are set up for a very specific technical purpose, hardly for relaxation-must have felt like being in a tomb!

Kamal schrieb:

Anechoic chambers are set up for a very specific technical purpose, hardly for relaxation-must have felt like being in a tomb!

One of our honourable commercial forum members (guess who) used to always say than an anechoic chamber was an ideal listening room

Maybe for mummies

A.C. = Listening Room !!!
You must be kidding !!!

bhagwan69 schrieb:

A.C. = Listening Room !!! You must be kidding !!! :KR

Nope! I was born without a smirk on my face

In thread http://www.hifi-forum.de/viewthread-59-561.html

Sonic_Master schrieb:

I dont think any lowend or mid end using vifa drivers in India not to mention regarding sony or philips etc... Even these speakers are nice like I said one more thing is that HOW MANY PEOPLE UP HERE HAVE TOTALLY UNECHOIC CHAMBERS IN THEIR HOMES TO ENJOY MUSIC? Answer this first and lets see how many will reply for this. If you want to listen the finest quality sound then you must have Finest rooms with highly Damped non reverberating chambers

Buying hi-fi is seriously dangerous in India, when commercial members resort to deploying their BS on noobs.

My Apology - Neutral !!

You have made your point loud and clear.

I would like to retract my statement.

A.C. = Listening Room !!! You must be kidding !!!

I really would like to know how many of us members have actually been to a A.C. ? Heard one own self speak etc.
It is a really very very erie feeling to say the least !!

Neutral schrieb:

Sonic_Master schrieb: ... HOW MANY PEOPLE UP HERE HAVE TOTALLY UNECHOIC CHAMBERS IN THEIR HOMES TO ENJOY MUSIC? Answer this first and lets see how many will reply for this. If you want to listen the finest quality sound then you must have Finest rooms with highly Damped non reverberating chambers Buying hi-fi is seriously dangerous in India, when commercial members resort to deploying their BS on noobs. :KR

Un-Echoic.I think he meant it literally as a non reverberent room.

Pardon him..he doeth not know what he sayeth

bhagwan69 schrieb:

I really would like to know how many of us members have actually been to a A.C. ? Heard one own self speak etc. It is a really very very erie feeling to say the least !!

I have been to a near A.C. during a business visit to an antenna design company in the US..the utilisation was different and so were the absorbtion ranges..but an eerie feeling all the same when you hear yourselves and other speak. only a flat sound and rather Loud !

Arj schrieb:

bhagwan69 schrieb: I really would like to know how many of us members have actually been to a A.C. ? Heard one own self speak etc. It is a really very very erie feeling to say the least !! I have been to a near A.C. during a business visit to an antenna design company in the US..the utilisation was different and so were the absorbtion ranges..but an eerie feeling all the same when you hear yourselves and other speak. only a flat sound and rather Loud !

If I were to go to a totally open space like the Rajasthan desert (where there would be no walls or trees to reflect sound), would the experience be similar to that in an anechoic chamber? A chamber is an expensive room. I have been to avMax office, but they use an ordinary room for speaker tests. Do any Indian manufacturers actually have the use of such a room?

Canada's NRC has one:
http://www.soundstag...eaker_in_chamber.jpg

an A.C also reduces ambient noice to Zero.

thats what makes it eerie. the desert has a lot of sounds.

Would a very good isolating canal phone give a similar feeling to the A.C?
Just Wondering...

well it usually only lowers the ambience not really cuts it off.
I guess high NR is possible only thru electronics ie noise cancellation circuits.. else it is of the the order of only 30% reduction

I believe noise cacellation is most effective when the ambient noise has a continuous,similar pitch/frequency;
e.g. noise cancelling headphones are the most effective with the noise of the jet engines while sitting inside a plane.
But when the ambient noise is a mixture of pitch/frequencies, e.g. like a rock band playing , they do not work as effectively.
IMHO (Sanjay wld be the best authority on this), an ear canal plugging device would considerably lower the ambient noise, but heghten your hearing awareness of your bodily sounds, e.g. blood flow etc-I have experienced this.

vjcritic schrieb:

Would a very good isolating canal phone give a similar feeling to the A.C? Just Wondering...

If you combine the canal phone with a quiet room, it would be a real treat. Only the music - you will only feel the venue. However, anechoic is a different experience as u can hear sounds without their natural reverb. It will sound thin and hollow - farely unnatural! Would take some getting used to.

BTW, Sachi had a bad experience with an Altec canal phone. Do consult him before considering this option.

Neutral schrieb:

vjcritic schrieb: Would a very good isolating canal phone give a similar feeling to the A.C? Just Wondering... If you combine the canal phone with a quiet room, it would be a real treat. Only the music - you will only feel the venue. However, anechoic is a different experience as u can hear sounds without their natural reverb. It will sound thin and hollow - farely unnatural! Would take some getting used to. BTW, Sachi had a bad experience with an Altec canal phone. Do consult him before considering this option.

Thanks, I have a set of decent canal phones JVCs which I slightly modded with Shure foamies. I use it mainly for air travel. It is not great but it works.
I was thinking a very good isolation with binaural recording would be similar to the AC chamber. Guess not.

vjcritic schrieb:

Thanks, I have a set of decent canal phones JVCs which I slightly modded with Shure foamies. I use it mainly for air travel. It is not great but it works. I was thinking a very good isolation with binaural recording would be similar to the AC chamber. Guess not.

Hi, what's the 'Marshmallows' that u mention in your profile? Good idea to use the JVCs in the aircraft. Grados are too open to keep out noise. Sound quality would certainly be better with the Grados for a quiet background like home. Love Diana Krall on them.

Neutral schrieb:

vjcritic schrieb: Thanks, I have a set of decent canal phones JVCs which I slightly modded with Shure foamies. I use it mainly for air travel. It is not great but it works. I was thinking a very good isolation with binaural recording would be similar to the AC chamber. Guess not. Hi, what's the 'Marshmallows' that u mention in your profile? Good idea to use the JVCs in the aircraft. Grados are too open to keep out noise. Sound quality would certainly be better with the Grados for a quiet background like home. Love Diana Krall on them. :)

This one here.
http://www.amazon.co...id=1188015880&sr=8-1

Endorsement from head-fi
http://www.head-fi.o...ighlight=marshmallow

Female vocals sound so good with the Grados especially female Carnatic vocals. Sadly I am not finding good quality recordings of the same.
I have one Diana Krall album From this moment on. Haven't had the time to listen to it yet! Allison Krauss sounded really good.