PG Soft Modal 20K, Scatternya Ngamuk di Mahjong Ways Top508 Main Santai Mahjong Ways Top508, Jepeh 3 Juta Pola 30X Terbukti Gacor, Lihat Hasilnya di Mahjong Ways Top508 Tes Pola Baru Mahjong Ways Top508, Bikin Hoki Nggak Masuk Akal Mahjong Ways Top508, Scatternya Beruntun Modal Receh Cuan Jam Gacor Malam Bikin Modal 50K Meledak di Mahjong Ways Top508 Tanpa Buy Spin, Sukses Dapat Double Scatter di Top508 Strategi Pola Mix Jadi Kunci Jepeh di Mahjong Ways Top508 15 Menit Main, Scatter Mahjong Ways Top508 Ngamuk 3x Surga Mahjong Ways Ada di Top508, Pola Gacor Auto Cuan Modal 20K Meledak! Mahjong Ways Lagi Panas Parah di BEST808 Pola Rahasia Mahjong Ways yang Bikin Scatter Ngamuk di BEST808 Iseng Coba Pola 30x, Eh Jackpot! Mahjong Ways BEST808 Emang Beda! Jam Gacor Malam Hari Terbukti Ampuh di Mahjong Ways BEST808! Pola Malam Mahjong Ways Paling Gacor — Hanya di BEST808! Pemula Pun Bisa Jepeh! Mahjong Ways di BEST808 Gampang Banget! Nggak Masuk Akal! Mahjong Ways di BEST808 Gacor Sebrutal Ini? Scatter Hitam Muncul Terus! Modal 25K Jadi Kaya di BEST808 BEST808 Lagi Royal! Mahjong Ways Modal Kecil Bisa Jadi Sultan! Pakai Trik Sederhana, Mahjong Ways di BEST808 Langsung Cuan! Cuan Gampang, Ini Cara Main Mahjong Ways di BEST808 Tanpa Ribet Rahasia Slot Mahjong Ways di BEST808, Modal Tipis Hasil Fantastis Main Mahjong Ways di BEST808, Coba Trik Ini Biar Langsung Profit Auto JP! Mahjong Ways BEST808 Buka Jalan Cuan Lewat Trik Sederhana Slot Mahjong Ways di BEST808, Kombinasi Strategi dan Keberuntungan Begini Cara Main Mahjong Ways BEST808 yang Bikin Dompet Tebal Main Tenang, Cuan Datang! Mahjong Ways BEST808 Bukan Slot Biasa Trik Main Mahjong Ways di BEST808 yang Sering Dipakai Pemain Pro Taklukkan Slot Mahjong Ways BEST808 dengan Gaya Main Efektif Ini Dari Modal Kecil Jadi Cuantastic, Mahjong Ways BEST808 Punya Jurusnya Cuan Maksimal, Ini Cara Main Mahjong Ways di TOP508 Tanpa Modal Besar Trik Jitu Mahjong Ways di TOP508, Bikin Spin Jadi Cuan Tiap Hari Slot Mahjong Ways di TOP508 Tawarkan Pola Menang yang Konsisten Gaya Main Santai Mahjong Ways di TOP508 Bisa Bawa Jackpot Serius Mahjong Ways TOP508, Slot Andalan Buat Pemain yang Cari Untung Stabil Main Mahjong Ways di TOP508, Gunakan Strategi Ini untuk Hasil Lebih Baik Spin Cerdas Mahjong Ways TOP508 Jadi Jalan Cepat Menuju Profit Kenapa Mahjong Ways di TOP508 Jadi Favorit Pemburu Slot Gacor Rekomendasi Trik Mahjong Ways TOP508 yang Cocok untuk Pemula dan Pro Pola Menang Mahjong Ways TOP508 Terbongkar, Ini Cara Mainnya Cara Main Mahjong Ways di OJI99 yang Bikin Setiap Spin Berasa Jackpot Trik Mahjong Ways OJI99 Paling Dicari Pemain Slot Online Tahun Ini Auto Cuan Main Mahjong Ways di OJI99 Cuma Pakai Strategi Sederhana Mahjong Ways OJI99 Slot Favorit dengan Pola Menang Konsisten Ubah Modal Receh Jadi Cuan Lewat Mahjong Ways di OJI99 Rahasia Mahjong Ways di OJI99 yang Jarang Diketahui Pemain Baru Spin Santai Bisa Cuan, Mahjong Ways OJI99 Cocok Buat Semua Gaya Main Incar Scatter dan Multiplier, Mahjong Ways OJI99 Kasih Potensi Menang Besar Mahjong Ways di OJI99 Banyak Bonusnya, Ini Saat Terbaik Buat Main Mahjong Ways OJI99 Pilihan Cerdas Buat Pemain Slot yang Cari Profit Rutin Mahjong Ways TOP508 Jadi Primadona Baru Saat Banyak Orang Ingin Cuan Tanpa Risiko Berlebih Mencari Penghasilan Tambahan Tanpa Ribet? Mahjong Ways di TOP508 Jawabannya Di Tengah Lesunya Ekonomi, Mahjong Ways di TOP508 Tawarkan Peluang Cuan yang Stabil Fenomena Mahjong Ways di TOP508, Strategi Cerdas Tambah Income dengan Modal Minim Banyak Orang Beralih ke Mahjong Ways TOP508, Rahasia Cuan Konsisten di Era Sulit Mahjong Ways di TOP508 Jadi Tren Baru Para Pencari Income Ringan dan Cepat Cuan Aman dan Legal Lewat Mahjong Ways TOP508, Tawarkan Pola yang Terbukti Efektif Gaya Baru Tambah Penghasilan, Mahjong Ways di TOP508 Ramah untuk Pemula dan Minim Risiko Mahjong Ways TOP508 Menjadi Pilihan Favorit di Tengah Kebutuhan Cuan Tambahan Harian Tak Perlu Modal Besar, Mahjong Ways TOP508 Hadirkan Cara Cerdas Tambah Pemasukan Ketika Waktu Luang Bisa Jadi Cuan: Mahjong Ways di BEST808 Buktikan Permainan Bisa Produktif Bukan Sekadar Game: Mahjong Ways BEST808 Tawarkan Potensi Penghasilan Tambahan Setiap Hari Mahjong Ways di BEST808 Bantu Banyak Orang Atasi Kebutuhan Finansial Tanpa Harus Kerja Lembur Penghasilan Tambahan Tanpa Tinggalkan Rumah? Mahjong Ways BEST808 Pilihannya Game Online Bisa Jadi Jalan Keluar Finansial? Mahjong Ways di BEST808 Buktikan Bisa! Pola Cuan Subuh di Mahjong Ways BEST808 Jadi Rahasia Komunitas Online Dapat Pemasukan Tambahan Meski Ekonomi Melemah, Mahjong Ways BEST808 Bantu Banyak Orang Tetap Produktif dari Rumah Langkah Awal Cuan Digital: Kenapa Banyak Pemula Pilih Mahjong Ways di BEST808? Mahjong Ways BEST808 Sediakan Solusi Realistis Tambah Income Tanpa Skill Khusus Mengisi Waktu Kosong dengan Cuan: Mahjong Ways di BEST808 Jadi Aktivitas Favorit Baru
Positioning Seating in a High Performance Room – Home Acoustics Alliance Portal
Home / Uncategorized / Positioning Seating in a High Performance Room

Positioning Seating in a High Performance Room

Over the years many articles have been written and classes taught about proper seating position in a home theater or media room.  Most talk about mystical rules of thirds or some precise fraction of the rooms length and width for proper placement.  Others focus on the proper position of the listener as a point in an equilateral triangle.  I’m not writing to debunk any such rules but rather to explain the science behind them and show where they tell only part of the story.

There are two prime factors, of many, for the proper placement of listeners.  First, the ideal locations with respect to the speakers and second, the best location for smooth bass response.  Both of these factors depend on the type of system and the size of the seating area.  For large rooms, like commercial cinemas the directivity of the speaker, the speaker locations, and speaker pointing are critical.  In small rooms, like a home theater, we face additional issues that complicate our designs.  In this article, I’ll discuss how front left, center, and right (LCR) speaker placement can affect our seating layout beyond simply using the correct angular separation.  Look for more articles in the future to fully cover this subject.

The concept of separating speakers to create an angle of 45º to 60º from the perspective of the prime listener is well known.  What isn’t so well know is that the speaker separation also dictates the size and shape of the “sweet spot”.  Plus, the addition of a center channel goes well beyond simply adding a dialogue speaker; in fact, this is a minor role for the center channel.

Diagram 1. Two Channel Sweet Spot

The True Function of the Center Speaker: The center channel has inherited the term dialogue speaker not because that is its sole purpose but rather because the movie industry jumped on the logic and convenience of porting most if not all dialogue to it.  The original purpose of the center channel was to create a wider area of good focus (good imaging) for stereophonic sound.  Diagram 1 shows the typical area (in green) in front of two speakers where balanced and focused stereo imaging is heard.  The layout shows the left and right speakers at an approximately 60º angle.  The darker green represents the space where the imaging is best centered.  Depending on the directivity of the speaker (directivity being the polar dispersion) the sweet spot or sweet area is a narrow aisle of focused sound running lengthwise in the room.  Speakers with a narrower directivity tend to have a narrower sweet area.

Diagram 2. Three Channel Sweet Spot

Diagram 2 shows how the center channel creates a sweet triangle instead of an aisle.  The advantage of this design is obvious; a much wider area of balanced focused imaging.  This is ideal for home theater where the audience is often more than a single listener.  You can see that this setup, while widening the good listening area, is still not sufficient to bring all the listeners into the sweet triangle.  Allowance must be made for the desired seating layout with reference to the speaker separation.

Diagram 3. Improved Three Channel Sweet Spot

Diagram 3 shows how decreasing the separation between the left and right speakers pulls the sweet triangle forward.  The advantage here is full coverage of the forward seating area with balanced focused sound.  The goal of the acoustical designer is to maintain the desired angular separation of the left and right speakers for accurate stereo imaging without leaving any seats out of the sweet area.  The best designs preserve the correct placement of stereo images across the soundstage while keeping the extreme side seats in the good focus zone.  It is possible to have side placed listeners retain a balanced soundstage but the design is always pushing the envelope of sweet triangle width versus proper left/right separation.  Part of the science of the acoustical designer and the art of the acoustical calibrator is creating a solid layout that accomplishes this goal.  All too often, without an understanding of this phenomenon, systems are designed strictly based upon the 45º to 60º rule compromising forward seating with an unbalanced soundstage.

2 thoughts on “Positioning Seating in a High Performance Room

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Top