The birch 2" Thick ProPanel Corner Bass Trap 24 x 48" from Auralex is a high-quality, fabric-covered, acoustic absorptive panel that is designed to fit within a standard 90° corner to increase low-frequency absorption. It can be used in rooms for broadcast TV productions, voiceovers, and mixing, and in recording studios to provide full-frequency control while offering a professional, aesthetically pleasing acoustic treatment.

In addition, ProPanels have a fiberglass core with hardened edges that meet the Class-A fire rating per ASTM E-84, making them a natural choice for use in areas with strict fire codes. Four CTC corner impaling clips are also included for easy installation.

With Four CTC Corner Impaling Clips    Fits In a Standard 90° Corner    Reduces Acoustical Reflections    Improves Speech Intelligibility    Controls Reverb    Back-Metered on 4' Sides of Panel    Class-A Fire Rated: ASTM-E84

Fabric wrapped acoustical absorption panels

Available as a corner bass trap

Edge hardened, back-mitered on 4' sides of panel

Reduce unwanted acoustical reflections

Tame chaotic reverberation

Improve speech intelligibility

Commercial and residential applications

Class-A fire rated: ASTM-E84

Related Questions and Answers

Q: 1. What extra part is needed for this collar to work on the canon R7

A: The extra part needed for the Silence Corner Atoll C Rotating Camera Collar for Select Mirrorless Cameras (Black) to work with Canon EOS R7 is the Silence Corner Atoll Heightening Plate for C/S/D Rotating Collar (Black) BH #SIATOLLHIGHB • MFR #SC-ATOLL-HIGH-B. https://bhpho.to/3COvjGI.

Q: 2. Will this hold most common film holders? I see someone posted a link to a 2 pack for $100. I would like to try and limit the price if possible. Thank you.

A: Yes, any of the standard 4x5 cut film holders will work quite nicely. I have 15 or 20 of them that I load at one time, so there is no need to do so in the field.

Q: 3. Can it be used with a cage on cam ?

A: No, the Silence Corner Atoll C Rotating Camera Collar for Select Mirrorless Cameras cannot be used with a camera body cage.

Q: 4. does it accept paper or just film?

A: You need to use a film holder on this camera, since the actual back is not light tight. It's only light tight once there is a film holder in place. Assuming you can load a 4x5 film back with a sheet of paper, then you can shoot either film of paper with this camera. Hope this helps.

Q: 5. Will this work with an Hasselblad XCD 120 3.5 macro with a diameter of 81mm?

A: Since the Silence Corner Atoll X Rotating Camera Collar has an inner diameter of 90mm the Hasselblad XCD 120 3.5 macro with a diameter of 81mm should work.

Q: 6. Does this come in a 3/4" size? I need a corner with 1" on one side and 3/4" on the other side.

A: These corners do not have any size options available. They are specifically for the Westcott Cine frames.

Q: 7. Hey do you know how wide is slide holder slot? i want to see if it will fit a regular graflok back sliding roll film holder(like Cambo C-243 - 6x12)

A: No, the following unit will only accommodate the two following film holders CatLABS 4x5" Film Holder Toyo-View 4x5 Sheet Film Holders

Q: 8. What is the pinhole diameter?

A: The pinhole is 1/64" for the Lensless 4 x 5" Pinhole Camera (Baltic Birch).

Q: 9. is this compatible with the canon r5c?

A: Yes, fit right on like the R5.

Q: 10. How do I determine my exposure using 400 speed film?

A: I carry a copy of the following chart. ( You can google for Mr. Pinhole, the site has a link to the calculator. No links are allowed in answers)f 2.8f 8f 16f 64f 2301/128000 Secs1/16000 Secs1/4000 Secs1/250 Secs1/15 Secs1/64000 Secs1/8000 Secs1/2000 Secs1/125 Secs1/8 Secs1/32000 Secs1/4000 Secs1/1000 Secs1/60 Secs1/4 Secs1/16000 Secs1/2000 Secs1/500 Secs1/30 Secs1/2 Secs1/8000 Secs1/1000 Secs1/250 Secs1/15 Secs1/2 Secs1/4000 Secs1/500 Secs1/125 Secs1/8 Secs2 Secs1/2000 Secs1/250 Secs1/60 Secs1/4 Secs3 Secs1/1000 Secs1/125 Secs1/30 Secs1/2 Secs7 Secs1/500 Secs1/60 Secs1/15 Secs1 Secs13 Secs1/250 Secs1/30 Secs1/8 Secs2 Secs26 Secs1/125 Secs1/15 Secs1/4 Secs4 Secs53 Secs1/60 Secs1/8 Secs1/2 Secs8 Secs2 Mins 45 Secs1/30 Secs1/4 Secs1 Secs16 Secs4 Mins 30 Secs1/15 Secs1/2 Secs2 Secs33 Secs7 Mins 1 Secs1/8 Secs1 Secs4 Secs1 Mins 5 Secs14 Mins 3 Secs1/4 Secs2 Secs8 Secs2 Mins 10 Secs28 Mins 6 Secs1/2 Secs4 Secs16 Secs4 Mins 21 Secs56 Mins 13 Secs1 Secs8 Secs33 Secs9 Mins 42 Secs2 Hrs 52 Mins2 Secs16 Secs1 Mins 5 Secs17 Mins 24 Secs4 Hrs 45 Mins4 Secs33 Secs2 Mins 10 Secs35 Mins 49 Secs7 Hrs 30 Mins8 Secs1 Mins 5 Secs4 Mins 21 Secs1 Hrs 10 Mins15 Hrs 60 Mins16 Secs2 Mins 10 Secs9 Mins 42 Secs2 Hrs 19 Mins30 Hrs 59 Mins32 Secs4 Mins 21 Secs17 Mins 24 Secs5 Hrs 39 Mins60 Hrs 59 Mins1 Mins 4 Secs9 Mins 42 Secs35 Mins 49 Secs9 Hrs 17 Mins120 Hrs 57 Mins2 Mins 8 Secs17 Mins 24 Secs1 Hrs 10 Mins19 Hrs 35 Mins240 Hrs 55 MinsIt allows me to meter the scene using an exposure meter ( or another camera ). If you are using 400 speed film choose ISO 400 on the meter or camera. Then cross reference the reading vs the chart for f/230.I have another chart that shows me the additional time required because of the film's reciprocity failure rate. (This will be specific to the film you are using.)