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Copyright © 2015 MS Electronics, LLC. All rights reserved. MSE Audio, Phase Technology and PhaseTech are registered trademarks and 

“Speakers for your Life” is a trademark of MSE Audio, Overland Park, Kansas USA. Phase Technology is part of MSE Audio

®

. www.phasetech.com. 

DESCRIPTION

TWEETER

WOOFER

RMS

FREQUENCY

SENSITIVITY

IMPEDANCE

DIMENSIONS

CUTOUT DIMENSIONS

WEIGHT

GRILLE

ACCESSORIES

SPEAKER

IMAGES

5.25” Coax In-Ceiling Speaker

.75” Soft Dome

5.25” Polypropylene w/ NBR
Surround

10 - 80 Watts

65 Hz - 20 kHz

86 dB

16 Ohms

11.75” Diameter x 5.75” Depth

8.375” Diameter

9.2 lbs.

Painted White Steel Grille

AC-CI20-PCB, AC-CI20-TB

6.5” Coax In-Ceiling Speaker

1” Soft Dome

6.5” Polypropylene w/ NBR
Surround

10 - 80 Watts

60 Hz - 20 kHz

88 dB

16 Ohms

11.75” Diameter x 5.75” Depth

8.375” Diameter

9.2 lbs.

Painted White Steel Grille

AC-CI20-PCB, AC-CI20-TB

8” Coax In-Ceiling Speaker

1” Soft Dome

8” Polypropylene w/ NBR
Surround

15 - 80 Watts

55 Hz - 20 kHz

88 dB

16 Ohms

11.75” Diameter x 8” Depth

8.375” Diameter

10.2 lbs.

Painted White Steel Grille

AC-CI20-PCB, AC-CI20-TB

CI520

CI620

CI820

[MAINTENANCE AND SERVICE]

Because of Phase Technology’s uncompromising quality control programs, it’s unlikely that your speakers will ever need service if 

connected and used as outlined in this Owners’ Manual. In the unlikely event that a problem does occur, please contact your Phase 

Technology dealer. Your dealer has the necessary factory-authorized parts and trained technicians to quickly restore your speaker to its 

original performance specifications.

[WARRANTY]

LIMITED WARRANTY

Phase Technology

®

 warrants its loudspeakers to be free from defects in material and workmanship for a period 

of ten (10) years for speaker product, limited lifetime for CI speakers, and three (3) years for the electronic components to the original 

purchaser. Purchase must be made from an authorized Phase Technology dealer.

This warranty does not cover service or parts to repair damage caused by misuse, abuse, damage while in transit, alterations, 

unauthorized repairs, failure to follow instructions, fire, flood or any other cause beyond the reasonable control of Phase Technology

®

Defects in speaker cabinets or grilles must be brought to the attention of your dealer immediately after purchase. This warranty will be 

void if the products’ serial number has been altered or removed.

Should your Phase Technology

®

 product require service, please call the MSE Audio

®

 customer service department for a return 

authorization. All merchandise returned to Phase Technology

®

 without prior authorization will be refused. For your return authorization 

number, please call 855.663.5600 or email [email protected].

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