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INSTALLATION MANUAL

Congratulations on purchasing the London Room Kit from Primacoustic. The London Room

Kits are easy to install acoustic panels that will effectively absorb a broad bandwidth of

frequencies and look great for years to come. Because Primacoustic panels are also Class-1

re rated, they are ideally suited to provide effective acoustic control in applications as diverse

as home-theatre, practice rooms, houses of worship, ofces, call centers and broadcast

studios. Please take a few minutes to read through this install manual. It includes a list of

parts as well as step by step mounting instructions. Please refer to www.primacoustic.com for

various placement options, benets, and general room acoustic information. Should you have

any questions or comments, we invite you to send us an email at: info@primacoustic.com

Primacoustic is a division of Radial Engineering Ltd. 1845 Kingsway Ave., Port Coquitlam, BC V3C 1S9, Canada

Tel: (604) 942-1001 • Fax (604) 942-1010 • info@primacoustic.com.

Specications and appearances subject to change without notice.

WARRANTY

Please inspect products immediately after receiving your purchase. Primacoustic acoustic products are guaranteed to be free of manufacturing defects for a period of 3 years after purchase. In the unlikely event that a defect is uncovered, please

call 604-942-1001 to obtain a RA number (Return Authorization number) from Primacoustic before the 3 year warranty period expires. Once you have obtained a RA number you must return the product, freight prepaid, within fteen (15) days

after the date the RA number is issued. Please return the product in the original packaging (or another, affording an equal degree of protection) with all of the following: (1) RA number clearly marked on the returned package; (2) a receipt or bill

of sale showing proof of purchase from an authorized seller; plus (3) a letter describing the defect. Please include your name, address, telephone number and the applicable RA number. You are solely responsible for all shipping and insurance

costs for returning the product to Primacoustic, and you will not be reimbursed or compensated for any loss or damage incurred during return shipping. Primacoustic will at its sole discretion repair or replace the product. Should the product no

longer be available, Primacoustic reserves the right to exchange this with a product of similar performance and value. Due to different dye lots, Primacoustic cannot guarantee exact color match. This Warranty shall solely extend to the original

owner and is limited to manufacturing defects and excludes damage due to improper installation, freight handling, wear and tear, abuse, misuse, misapplication, color fading or deterioration due to prolonged exposure to ultra violet light, smoke,

humidity or other environmental factors. It is understood that the use and suitability of the product is entirely the responsibility of the buyer or specifying engineer and as such, these parties agree to hold Primacoustic, or its associated company,

and/or ofcers, harmless from any responsibility whatsoever other than what is clearly outlined in this warranty.

CORE MATERIAL Formed, semi rigid inorganic glass bers; Density = 6.0 lbs. (2.72kg/m3) per cubic foot

COLOR OPTIONS Color code: Black=00, Beige=03, Grey=08, Absolute White™=09

• Bubble level

• Phillips #2 screw driver

• Power drill

SPECIFICATIONSTOOL REQUIRED

LOND ON R O O M K I T

London 8

(4) 12" x 48" Control Columns

(30cm x 120cm)

(8) 12" x 12" Scatter Blocks

(30cm x 30cm)

(20) Surface Impalers

London 10

(8) 12" x 48" Control Columns

(30cm x 120cm)

(12) 12" x 12" Scatter Blocks

(30cm x 30cm)

(28) Surface Impalers

London 12

(2) 24" x 48" Broadband Panel

(60cm x 120cm)

(8) 12" x 48" Control Columns

(30cm x 120cm)

(12) 12" x 12" Scatter Blocks

(30cm x 30cm)

(28) Surface Impalers

(8) Corner Impalers

London 16

(4) 24" x 48" Broadband Panel

(60cm x 120cm)

(16) 12" x 48" Control Columns

(30cm x 120cm)

(24) 12" x 12" Scatter Blocks

(30cm x 30cm)

(48) Surface Impalers

(16) Corner Impalers

The London Room Kits contain a moderate amount acoustic material for recording studios with a footprint of approximately 120 to 150

square feet (11 - 14 square meters), or home theaters of 150 to 200 square feet (14-19 square meters). This is a good rst step when

tuning your room’s acoustics as it will provide a base amount of broadband acoustic treatment for these room sizes. Overtly treated

rooms with “dead” acoustics are avoided with the exception of voice over booths. However, depending on your personal preference and

room layout, the amount of acoustic material could be increased for a less reective, darker sounding room or decreased to create a

livelier ambiance. During the treatment process we recommend you conduct listening tests with music you know well.

LI VE -E N D

(m or e re flec tiv e)

DE AD -E ND

(l es s re fl ec tiv e)

SWEET SP OT

RECORDING STUDIO LEDE LAYOUT

The London Room Kits, when installed as suggested, follow a

variant of the live-end, dead-end concept referred to as LEDE. The

intent of an LEDE layout is to help you to produce tonally balanced

recordings that translate well on playback equipment outside your

studio. The room is divided into “front” and “rear” sections and

includes a well dened listening area or “sweet spot”. The front

half of the room (where the monitors are generally located) has

the most amount of acoustic material applied in order to absorb

primary reections before they reect into the mix position. This

allows the engineer to hear a high ratio of direct sound from the

monitors with less interference from room reections. The rear

section of a LEDE designed room employs acoustic diffusers that

break up the sound energy and reect it back into the room in

random directions to create diffuse room reverberation. The rear

wall treatment provides a sense of space and ambience while

eliminating standing waves between the front and rear walls. For

more information about the LEDE concept see the Primacoustic

TechNotes at www.primacoustic.com.

24" x 48" Broadband Panel front left and right corners:

The large Broadband panels are part of the “dead end” front wall

that attenuates primary reections from the rear and side walls.

The two inch thick panels provide high and mid-range absorption

eliminating utter echo and standing waves. When mounted

across 90° corners an air space is formed behind the panel that

increases the absorption of low frequencies (bass trapping). Your

room’s dimensions will determine the low frequency response

and cause specic low frequencies to resonate (room modes)

more than others. The corner mounted Broadband panels are a

good place to start for rooms with favorable dimensions for music

reproduction. Depending on your room dimensions you may need

to address other narrow-band low frequency resonances. See the

Primacoustic web site or talk to your Primacoustic dealer to learn

about our products that can be employed to treat low frequency

room resonance.

12" x 48" Control Columns front and side walls:

The Control Columns also form part of the dead end and are

intended to absorb the primary reections that bounce off the side

walls and into the sweet spot. Left untreated, these reections

can equal the amplitude of the direct sound from the monitors and

cause degrading comb ltering phase effects. Placing Control

Columns on the front wall and on the sides between the sweet

spot and the monitors allow you to hear a truer sound from your

monitors and also eliminates utter echoes that bounce back

and forth across the mix position. Typically, Control Columns are

spaced on the side walls with a 6" to 12" gap between Columns.

Distribute the Columns evenly across the sides and front walls.

12" x 12" Scatter Blocks rear wall Soft Diffusion:

The LEDE concept calls for acoustic diffusion in the rear section

of the room. These devices work by breaking up and reecting

sound waves back into the room in a diffused eld. The problem is

that for diffusers to work; they must have sufcient mass making

them large and heavy. Scatter Blocks present an affordable

alternative to full scale diffusion. By arranging Scatter Blocks

in patterns with reective spaces in between you create an

checkerboard effect we call Soft Diffusion™. This provides for

some of the acoustic energy to be absorbed while a portion is

allowed to reect back into the room. This helps control utter

echo and reduces standing waves while leaving a sense of ‘air’

or natural ambience in the room. Because Scatter Blocks are

individually mounted they easily accommodate furnishings like

bookcases or sofas.

1. Direct sound waves from monitors. Direct sound waves arrive at the sweet

spot without reecting off of room surfaces.

2. Primary reections. Off-axis sound waves from the monitors reects off

the side walls and into the sweet spot. These reections combine with the

direct sound and cause phase cancellations. Control Columns reduce the

amplitude of side primary reections.

3. Secondary reections bounce off of two or more room surfaces and eventually

fall-off into room reverb. If left untreated they can create chatter echo where

several distinct repeats are heard instead of a smooth reverb tail.

4. Soft Diffusion helps break up reections returning from the rear wall controlling

standing waves while maintaining a natural room ambience.

5. Low frequency energy wraps around objects and is guided into the corners

by the room boundaries. The corner mounted Broadband panels absorb bass

in the corners and deaden the front wall to control primary reections and

standing waves between the front and back walls.

6. Flutter echoes bounce back and forth between parallel walls across the sweet

spot. Control Columns on the sides and front walls eliminate utter echoes

and control standing waves that set up across the sweet spot.

10’ x 12’ x 8’ (120 sq./ft.)

3m x 3.6m x 2.4m (11.2sq./m)

24" x 48" Broadband Panel room corners:

The large Broadband panels can be located in either the front or

rear corners with the same expected performance of controlling

standing waves, absorbing high/mid-range frequencies and

trapping bass in the corners. Locating Broadband panels on the

rear wall behind the surround speakers can help make surround

channel information more distinct by absorbing reections that

would otherwise compete with the direct sound from the surround

speakers.

12" x 48" Control Columns side walls:

Control Columns are located on the sides between the

loudspeakers and seating area. Here they control off-axis sound

waves from the front speakers before they bounce off the side

walls and into the seating area. If left untreated, to much of

these powerful primary reections can reach the seating where

they combine with the direct sound causing destructive phase

cancellations. By reducing primary reections from the sides a

higher ratio of direct sound is heard at the seating area making

critical mid-range frequencies clearer and dialog more intelligible.

12" x 12" Scatter Blocks soft diffusion:

The rear wall, as in the recording studio layout, is the primary

location for Soft-Diffusion treatment. The goal is a mix of absorbent

and reective surfaces that reduce standing waves between the

front and rear walls but still return some acoustic energy into the

room. Place Scatter Blocks in a staggered pattern on the rear wall

directly behind the seats to treat standing waves at the seating

area. Home theaters have the advantage of more furnishings

than what is found in a typical recording studio. Furnishings like

bookcases can offer excellent diffusing properties. Scatter Blocks

can be integrated with your existing furnishings by looking for

open areas on the rear wall.

ALTERNATIVE LAYOUTS

HOME THEATER LAYOUT

While a recording engineer wants the room to play less of a role in the reproduced sound, a home theater enthusiast is inclined to allow

the room to inuence the soundstage through more reective surfaces. The increased reections make for a livelier room sound which

translates to a more exciting and realistic experience. The key to home theater layout is spreading the acoustic material out to create

a somewhat even balance of reective and absorbing surfaces throughout the room while keeping an eye out for the most problematic

reections like off-axis primary reections from the side walls, utter echo and standing waves.

11' x 12' x 8' (132sq./ft.)

3.4m x 3.6m x 2.4m (12.3sq./m)

11' X 14' x 8' (154 sq./ft.)

3.3m x 4.2m x 2.4m (13.8sq./m)

Broadband panels and Columns form

a less reective “front” wall while

trapping bass and reducing standing

waves/utter echo. Acoustic symmetry

is maintained.

In this music listening room the windows are

treated with drapes and Control Columns are

position opposite to balance the symmetry.

12’ X 16’ x 8’ (192 sq./ft.)

3.6m x 4.8m x 2.4m (17.2sq./m)

1. Direct sound waves from loudspeakers.

2. Primary off-axis reections are attenuated by Control Columns.

3. Secondary reections bounce off of two or more room surfaces and eventually

creates room reverberation.

4. Diffused sound waves form the rooms reverb tail.

5. Low frequencies are guided into the corners by room boundaries.

6. Standing waves set-up between parallel walls.

Often, the challenge in setting up a home studio, theater or music

listening room is maintaining symmetry while accommodating

existing furnishings and room xtures like windows. When dealing

with a less than ideal room some creative modications to the

layout can be made without adversely affecting your ability to

achieve a balanced room response with the London room kit.

Here are some tips for the different panel sizes.

Broadband Panels: The 24" x 48" Broadband panels can

be stacked two high in any room corner and still provide the

same amount of bass trapping. To increase the absorption of

low frequencies you can pack the air space behind the corner

mounted Broadband panels with polyester batting.

Control Columns: The 12" x 48" Columns are to absorb off-axis

primary reections from the front loudspeakers. In the examples

to the right the Columns are used opposite from windows. Drapes

on the windows can help make the acoustic treatment more

symmetrical.

Scatter Blocks: The 12" x 12" Scatter Blocks are very exible.

If the rear wall is unavailable they can be divided into two groups

of six staggered panels to treat more than one room surface.

Alternatively, if you have bookcases acting as rear diffusers you

can go ahead and use the Scatter Blocks on any large untreated

room surface or to augment the sides and front treatment in larger

rooms.

Tuotetiedot

Merkki:	Primacoustic
Kategoria:	Ei luokiteltu
Malli:	London 10

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