Phase Technology ci-10 viii Installation Instruction

CI-10 VIII    CI-20 VIII   CI-40 VIII   CI-60 VIII   CI-72 VIII   CI-70 VIII   

Install instructions for CI rectangular flush mounts models:

CI-10 VIII    CI-20 VIII   CI-40 VIII   CI-60 VIII   CI-72 VIII   CI-70 VIII 

Install instructions for CI rectangular flush mounts models:

Thank you for purchasing Phase Technology CI custom 

installation speakers. This eighth generation of high 

performance in-wall models features the same superb 

sonic performance as our acclaimed PC-Series cabinet 

speakers in addition to great flexibility and easy installa-

tion, thanks to Phase Tech’s patented QuickMount™ 

tool-free clamping system. The most striking change to the 

series VIII is a new look with the off-axis tweeter design. 

This feature maximizes the speaker’s clarity and imaging by 

creating an asymmetrical loading or diffraction pattern, 

reducing the amount of diffraction normally caused by a 

flange-to-wall junction. The net result is the best sonic 

realism you can buy in an in-wall. All CI-Series speakers include 

self-resetting solid-state PTC protection circuits. This unique 

system is able to detect when the speaker is being over-driven 

and lowers the speaker volume until the problem is corrected. 

The PTC device then resets itself for normal operation. Other 

features include liquid-cooled tweeters for greater power 

handling, moisture-resistant materials in all of the critical 

speaker components, galvanized steel speaker grilles and 

stainless steel hardware for improved corrosion resistance, IR 

knockout mounts and tweeter level controls.

Universal flange

assembly (CI-FG QM)

Flange Clamp (4x)

Quick mount (QM)

clamping post (4x)

QuickMount

™

 (QM)

clamp (4x)

Speaker/baffle 

assembly 

Flange Clamp 

Screw (4x)

Grille

The RB-18 rough-in bracket is available separately. 

1. Choose the appropriate mounting 

location for each speaker.

2. Remove the speaker and flange/grille 
assemblies from their boxes.  Using the 
supplied cutout template, carefully mark 
the area to be cut out. Using a drywall 
knife or saw, cut the hole in the drywall 
and prepare the speaker wires for 
connection to the speaker terminals. Use 
a level to insure that the flange is square.

3.  Remove the grille from the 
mounting flange by pressing it from 
behind. Attach the provided white 
gasket material to the outside, rear 
edge of the flange.  Insert the 
mounting flange into the hole with 
the end marked “TOP” facing up. 
Loosen the flange clamping screws 
one turn (counter clockwise) to 
release the clamp. Next tighten all 4 
flange clamp screws evenly to secure 
the flange to the wall.  It is best to 
tighten each screw with the same 
amount of force (torque).  
CAUTION: Do not over tighten.

7.  Tighten down the four QM clamps 

by pressing them down flush with the 

baffle’s surface.

6.  Insert the baffle into the mounting 
flange, aligning QM clamps with the 
four QM posts. Also make sure that the 
tweeter is placed at the end of the 
flange marked “TOP”.

4.  Use the provided tool to fully open 
the four Quick Mount™ (QM) clamps. If 
the tool is not available a small screw 
driver can be used.

NOTE – When deciding upon a location 
consider the following:
• 

Be certain your speaker wires can be run to 

or are accessible from these locations.

• 

Make certain the wall or ceiling material is 

sturdy enough to support the weight and 

vibration of the speakers.

• 

It is recommended that our pre-

construction rough in brackets (part number 

RB-18) be used whenever possible in new 

construction.

• 

Be certain the area behind the speaker is 

free of obstacles such as wall studs, electrical 

wiring, pipes, etc.

• 

Each speaker should be positioned 

properly relative to the listening area for good 

coverage. 

• 

Audio performance and room-to-room 

isolation will be improved if there is some 

fiberglass insulation placed loosely behind the 
speaker.

8.  Using some familiar source material, 

listen to the tweeter’s balance with the 

level control in each of its three 

positions to find your favorite.

9. Carefully install grille by pressing it 

into the gap between the flange and 

the baffle and enjoy your new Phase 

Technology CI speakers.

5.  Connect the speaker wires to the 

spring loaded input terminals on rear 

of speaker, making sure no loose 

strands are exposed.

    red/positive        black/negative

+

–

218-1223

Tweeter adjustment

flange screw