User Guide

010-1450
Model 451 LR 453 C 454 SR
Type Sealed-box, 3-way Sealed-box, 3-way, Sealed-box, TwinPolar™ (V-pole)
D’Appolito D’Appolito spatially-enhanced
Drivers (2) 6-1/2" IMG woofer; (2) 6-1/2" IMG woofer; (2) 5-1/4" IMG woofer;
(2) 3-1/2" IMG midrange driver; (2) 3-1/2" IMG midrange driver; (2) 3/4" silk dome tweeter,
(1) 1" silk dome tweeter, (1) 1" silk dome tweeter, neodymium magnet, ferrofluid cooled
neodymium magnet, ferrofluid cooled neodymium magnet, ferrofluid cooled
Frequency 80Hz – 20kHz 80Hz – 20kHz 80Hz – 20kHz
Response (±3dB)
Nominal 8
Ω 8 Ω 8 Ω
Impedance
Crossover 350Hz – 4.5kHz 350Hz – 4.5kHz 3.5kHz
Frequency
Sensitivity 91dB 91dB 87dB
Recommended 100 – 200WRMS 100 – 200WRMS 100 – 200WRMS
Amplifier Power
Magnetic Shielding Yes Yes No
Size (W x H x D) 7.5 x 25.75 x 11.375in 25.75 x 10.0 x 10.5in with base 7.875 x 18.7 x 7.25in
190 x 655 x 288mm 655 x 254 x 267mm with base 200 x 475 x 184mm
Weight (ea., unpacked) 27lbs; 12.25kg 25lbs; 11.35kg (28lbs; 12.71 with base) 12lbs; 5.45kg
Specifications are those in effect at the time of printing. Atlantic Technology reserves the right to change specifications or
appearance at any time without notice.
THX and Lucasfilm are registered trademarks of Lucasfilm Ltd. Dolby Digital, AC-3, Dolby Stereo and Dolby Pro Logic are
trademarks of Dolby Laboratories Licensing Corporation. DTS is a registered trademark of DTS Corporation.
System 450 THX Specifications
For Future Reference
Record your speaker(s) serial number(s) and date of purchase here:
Model Number Serial Number Date of Purchase
Model Number Serial Number Date of Purchase
Model Number Serial Number Date of Purchase
The serial number is found on the back of the speaker near the connecting terminals.