That little "boyng" is stealing your detail: Fix flutter echo in 30 minutes
The quick, repeating "boyng" of flutter echo masks transients, blurs vocals, and weakens stereo imaging. With a Primacoustic London 8-Panel Kit installed correctly, you can remove that ring and restore studio-grade clarity.
Below is a room-by-room plan with exact panel positions, mounting choices (flush vs. gapped), and quick tests to prove the difference. As the authorized distributor in the Philippines, Noiseless.ph stocks these kits and offers layout consultations to plot panels directly onto your floorplan.
The 30-Minute Plan: Stop the ring now
Set your listening sweet spot and speaker geometry first: speakers and your head should form an equilateral triangle. Use the mirror trick (below) to mark first reflection points on the side walls. Prioritize placement in this order: side walls → front wall behind speakers → rear wall behind listening position → ceiling.
Prioritize placement in this order:
- Side walls
- Front wall (behind speakers)
- Rear wall (behind listening position)
- Ceiling
For a small rectangular room, a practical 8-panel spread uses four Control Columns on the side walls (two per side) and Scatter Blocks on the front and rear walls. If you still hear a vertical "slap" (floor to ceiling), move two scatter blocks to the ceiling directly above your desk.
What you are actually treating: The physics of the London 8
Flutter echo is a rapid, repetitive ringing created by parallel hard surfaces. The Primacoustic London 8 Kit contains:
- 4 Control Columns: 12" x 36" x 1.5"
- 8 Scatter Blocks: 12" x 12" x 1"
- Hardware: Includes Surface Impalers and anchors.
These panels use high-density 6lb per cubic foot fiberglass. This is 5x more effective than typical acoustic foam, especially in the mid and high frequencies where vocal clarity lives.
Pro Tip: Mounting a panel with a 2-inch air gap (using spacers) shifts the absorption deeper into the lower-mids, helping to tighten "boomy" bass without needing thicker traps.
Exact 8-Panel Layouts for Common Rooms
The mirror trick — step‑by‑step
- Sit in your sweet spot and keep it fixed.
- Have a helper hold a small mirror flat against the side wall at tweeter/ear height.
- Slide the mirror slowly along the wall until you first see the speaker in the mirror — mark that spot.
Layout A: Small Home Studio
Place two Control Columns on each side wall at the marked reflection points. Install a single Scatter Block cluster behind your monitors. If you are using a desk, pair this with Primacoustic IsoPlane stabilizers under your speakers to stop vibrations from hitting the desk surface.
Layout B: Podcast or Meeting Room
Top view: a sparer side treatment (one tall column per side at the strongest first reflection), two columns or stacked scatter blocks behind each speaker for front absorption, two staggered scatter blocks on the rear wall to break combing, and reserve two scatter blocks for corners or mid‑ceiling clusters if low end needs help.
Layout C — Small meeting room / home theater
Prioritize speech intelligibility. Place four Scatter Blocks at ear height to reduce "slapback" across the table. Use the remaining blocks on the rear wall. To further isolate your voice, we recommend the Primacoustic VoxGuard DT to wrap around your microphone.
Mounting in the Philippines: Concrete vs. Drywall
- Concrete/Masonry Walls: Most Philippine condos use solid concrete. You will need a masonry drill bit and plastic wall anchors or concrete screws.
- Gypsum/Hollow Walls: Use the toggle bolts or the included impaler clips. Always try to secure at least one side into a metal or wood stud if possible.
When 8 panels are not enough
If the room still feels "boomy" in the corners, you may need to step up to the London 10 or 12 kits, or add dedicated Primacoustic MaxTraps to the corners to soak up low-end energy.
Conclusion
Attacking side-wall reflections first with the London 8 kit usually removes the flutter "boyng" immediately. Verify your progress with a simple "hand-clap test." If the ring is gone, your Beyerdynamic monitors will finally sound the way they were designed to.
Visit Noiseless.ph to grab your kit today or book a short consultation to have our team review your room layout.
