Model 452 PBM THX Reference THX Powered Subwoofer System Atlantic Technology ® I N N O V A T I V E H O M E T H E A T E R 343 Vanderbilt Avenue Norwood, MA 02062 (781) 762-6300 Instruction Manual ®
Model 452 PBM THX Atlantic Technology MODEL 452 PBM THX ® Reference THX Powered Subwoofer System Congratulations on your purchase of an Atlantic Technology 452 PBM THX powered subwoofer. With proper care, your new subwoofer will provide many years of trouble-free, high quality reproduction. The 452 PBM is fully THX certified to provide very high output levels and a wide dynamic range with smooth in-room response down to 20 Hz, with a peak SPL of 110 dB.
Atlantic Technology Model 452 PBM THX ® ● Adjustable low-pass filter from 55 Hz to full bypass The slope of this low-pass filter is 18 dB/octave. This allows for flexible integration with most any brand or type of speaker on the market. A subsonic filter is also incorporated to filter out inaudible frequencies that can rob amplifier power.
Atlantic Technology Model 452 PBM THX ® Figure 1: Amplifier panel and controls for Model 452 PBM THX ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 4 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Atlantic Technology Model 452 PBM THX ® Example 1: Subwoofer Line Out/ Low Level In Receiver/Amplifier/Processor This is the most commonly used system connection for systems with surround sound receivers/ processors. Sub Woofer Out HI PASS OUT LOW LEVEL THRU IN HI PASS OUT L/MONO L/MONO RIGHT RIGHT Single Sub Woofer Example 2: Preamp Line Out/Low Level In for 1 Subwoofer This arrangement is for owners of stereo receivers/ amplifiers with Preamp outputs.
Atlantic Technology Model 452 PBM THX Example 3: Preamp Line Out/Low Level In for 2 Subwoofers Note that the L/MONO input is used on both subwoofers. Instead of Y-adapters, you may also use the THRU outputs to connect back to the Main Inputs as shown in Option 2 of Example 2. Example 4: Preamp Line Out/Low Level In using Hi-Pass Out for 1 Subwoofer The line level HiPass outputs send audio signals above the Lo-Pass filter setting to the main L and R power amplifier inputs.
Atlantic Technology Model 452 PBM THX ® Example 5: Speaker Out/ High Level In for 1 Subwoofer Receiver/Amplifier Main Speakers This is the most common method for connecting a subwoofer to a system without a dedicated subwoofer line out or Preamp outputs.
Atlantic Technology Model 452 PBM THX THX Example: THX Subwoofer Out/Low Level In Option 1 is the most commonly used method of connecting two subwoofers to a THX system. You may also use a Yadapter as shown in Option 2.
Atlantic Technology Model 452 PBM THX ® Figure 3: The fuse is located next to the IEC AC socket Changing the Fuse To change the fuse, remove the power cord, insert a screwdriver tip into the notch in the side of the fuseholder, and pry it out. Replace with the correct value fuse and push back into place. Fuse values are marked adjacent to the IEC AC socket.
Atlantic Technology Model 452 PBM THX ® Subwoofer Tuning—Using the Variable Level Control Figure 5: Front Panel Variable Level Control located behind the removable grille Start your listening with the high-pass filter set at 80Hz, the phase switch set to normal, and the front panel variable level control (Figure 5) set to minimum, just above the Fixed THX clickstop position.
Atlantic Technology Model 452 PBM THX ® THX Settings When using the 452 PBM THX in a system employing THX electronics, both the lo-pass filter on the rear panel and the variable level control on the front panel should be set in the THX position for proper operation. Rotate the variable level control fully counterclockwise until it clicks into the Fixed THX position. This is the preset THX level, but you may increase the setting of this control to compensate for room acoustics.
Atlantic Technology Model 452 PBM THX ® Model 452 PBM THX Specifications Bass Driver 15 high excursion" Output Power (rms) 325W Distortion (amplifier) 0.025% Frequency Response (±3 dB) 25Hz – 500Hz Input Impedance High Level (speaker) Low Level (line) 10kΩ 1kΩ Peak SPL 110dB Dimensions (W X H X D) 16.75 x 22.625 x 19.625in 425 x 575 x 500mm Weight 86lbs/39kg Power Requirements 110V AC 50/60Hz 240V AC 50/60Hz Specifications are those in effect at the time of printing.
