The 4" Studiofoam Pyramid-22 acoustic panel from Auralex is a recommended treatment for medium to large areas like concert halls, gymnasiums and churches, rooms with pronounced low-frequency problems, or where sonic accuracy is mandatory and maximum acoustic absorption is required.

Having 4-sides exposed on each pyramid provides more sound wave diffusion, desirable in certain spaces and yielding less overall dryness than 4" Studiofoam Wedges.

4" x 24" x 24"    Absorption

Great looks and great sound control for just about any application

Supplies extra diffusion due to 4-sided geometry

Provides up to 24 ft² of coverage

Pyramid cut offers versatility during installation - many different shapes and sizes are possible and provides virtually seamless installation

Class B flame retardancy

Will not crumble with age

Related Questions and Answers

Q: 1. Has anyone else had any issues with the sternum straps or shoulder straps loosening up on their own? My straps have started to loosen up on their own and it happens all the time.

A: There have not been any reported issues with straps loosening on the Peak Design Everyday Backpack v2 (30L, Black).

Q: 2. Is this pack designed to accept a hydration reservoir, such as a Camelbak?

A: I don't think so.

Q: 3. I am looking for a backpack for a 4x5 camera and 3 lenses, plus a 35mm digital. Would all that fit in this pack?

A: No, it will be too small. I would recommend the 26L or the 36L.

Q: 4. How do you attach a tripod to it?

A: Hi, a folded tripod can be carried on the top of the bag, with one leg inside the top flap. The third photo from the top shows a tripod being carried.

Q: 5. is the waist band removable?

A: It's not removable on the 18L either.As others have suggested, if you need a bag this big you'll probably welcome the waist straps to distribute the weight between your shoulders and hips. For air travel, for example you can put the straps around the bag instead of your waist.

Q: 6. Can this bag carry a Mirrorless with battery grip? Something along the lines of a Z9 for example?

A: Absolutely! The Everyday Backpack can definitely accommodate a battery-gripped mirrorless body.

Q: 7. will the mindshift 36L hold a canon 600mm f 4 and a canon R5 with adaptor for EF lens ?

A: The MIndshift 36L will not hold your setup all attached but will fit when detached from the camera.

Q: 8. Can it be configured to take 2 mounted Nikon D810 with lens 28-200 (12cm) and 24-85 (9cm)? Thanks.

A: Yes, you definitely can configure this bag to fit your equipment.

Q: 9. Any chance I can fit a 15 MacBook Pro in the laptop sleeve?

A: I haven't tried it myself. But I think it might make it.

Q: 10. Does the bag stand up when loaded or does it tend to tip over?

A: The way I have mine loaded it stands up.