APOGEE ACOUSTICS INC.
Full Range Ribbon Speaker System Apogee Acoustics has resolved fundamental problems inherent to ribbon acoustical transducer design. For the first time clarity, speed and power are provided over the entire music spectrum with a full range ribbon speaker system.
APOGEE ACOUSTICS' FULL RANGE RIBBON SPEAKER SYSTEM APOGEE ACOUSTICS takes great pride in announcing a revolutionary development in loudspeaker design; the first full range ribbon speaker system. Previous sound system's have employed ribbon-technology to provide outstanding performance in the high frequency, tweeter range.
TABLE OF CONTENTS Pages PREPARATION (Steps 1-6) ---------------------------1-3 ASSEMBLY (Steps 7-11) -----------------------------3-5 PLACEMENT (Steps 12-14) ---------------------------5 BIAMP OPERATION -----------------------------------6 SPEAKER CONNECTION FOR BI-AMP ---------------------7 APOGEE PASSIVE CROSSOVER --------------------------8 AMPLIFIER IMPEDENCE LOADING TABLE CX-1 ------------9 SPEAKER ADJUSTMENTS -------------------------------10 SPECIFICATIONS ------------------------------------11 LOW I
SPEAKER SET-UP The APOGEE speakers' performance is affected by the quality and compatibility of the front end equipment, turntable, cartridge, electronics, connections, room acoustics and the placement within the room. Care in selection of compatible equipment and placement of the speakers within the room will be very rewarding in terms of the sonic quality of your music system. ASSEMBLY The APOGEE Speaker System is packaged in five cartons.
CAUTION - USE CARE - DO (3) NOT allow any object to touch the ribbons!! Unpack outer midrange tweeter-left, MRT-L, and MRT-R and place the outer boxes in position A and B as shown in FIG. 1. During the removal of the inner containers do not rotate the container (lift straight out). The inner containers for MRT-L and MRT-R should be placed on the floor as shown in FIG. 1, position G and H. Please note the top and bottom orientations of the containers. The rear bottom of MRT inner box should be up.
(5) Place the right midrange tweeter, MRT-R on boxes A and B. (see FIG. 2). The bottom of the MRT-R should be toward speaker position. a) Remove the white foam end caps. b) Remove top and bottom corrugations. c) Do not rotate MRT during this procedure. (6) Carefully move the midrange tweeter toward the woofer until they butt. Two people should be involved in this process. Do not slide the midrange tweeter but lift gently for this process. (7) Assembly of woofer and MRT.
(9) Attach base plate to woofer. a) Use the T-Handle wrench and 1/2" long 1/4-20 Flat Head Socket Screws, and secure base plate to woofer of speaker using 8 screws. The base plate is oriented as shown in FIG. 3 and 4 with the bottom of the base plate seen from the right speaker position. The mounting holes for the transformer are behind the speaker. b) Align holes with the Drift Punch. Two people are needed, one to hold base plate, the other to start screws.
(12) Placing speaker upright. This procedure requires two people with clean hands. The stronger person should be positioned to lift the top section of the mid range tweeter while the other person should be positioned to lift the top section of the suede covered ear. A rubber mat should be placed between the floor and the front edge of the base plate (see FIG. 7) to protect the floor and base plate and prevent slippage. CAUTION!! Keep fingers clear of ribbons. Use care as speaker weighs 300 pounds.
BIAMP Operation 1. CONNECT crossover between Pre Amp and Power Amps. 2. For APOGEE crossover go to Step 3. For other manufacturers follow instruction with unit. Note the woofer/midrange crossover frequency is 400 Hz and the slope is 6db/octave. 3. Connect Preamp Output to crossover input. Connect Lo output to woofer Amp input and Hi output to MRT Amp input. Make sure that the crossover loading resistors are installed. - See passive crossover section of this manual.
SPEAKER CONNECTIONS FOR BI AMP 1. Connect the woofer cables to the woofer binding posts of the transformer box. Blue cable to blue binding post and black cable to black binding post. 2. Connect the MR cables to the MR binding posts. White cable to white post and black cable to black post. 3. Connect the Tweeter cables to Tweeter binding posts. Red cable to red post and black cable to black post. GENERAL CARE 1. The grill may be cleaned with a soft dusting brush. 2.
APOGEE PASSIVE CROSSOVER INTRODUCTION The Apogee passive crossover is designed to provide the electrical separation of woofer and midrange-tweeter signals. This is accomplished at signal levels between the pre-amplifier and power amplifiers in a manner to provide the most coherent and musically accurate result. This passive approach requires selection of loading resistors to provide the ultimate performance.
TABLE CX -1 Amplifier Amplifier Impedence Load Resistor RHI & RLO Spectral DMA - 100 10K NONE Perreau 2150 10K NONE ML-3 20K 20K 22K 18.2K Bryston 4B 50K 12.4K ML-9 50K 12.4K D-90 50K 12.4K Threshold 75K 11.5K ML-2 100K 11.0K Quicksilver 200K 10.
SPEAKER ADJUSTMENTS The performance of the Apogee Ribbon Speaker will respond to adjustments that can be made in three separate ways. The first way that adjustments may be made is by speaker position within the room. This is room dependant and primarily affects the openness and correctness of the sound image. Large changes in the speaker position will affect the frequency balance. The second adjustment is the crossover gain controlled by a rotary position switch.
SPECIFICATIONS FULL RANGE RIBBON SPEAKER Three element system - Woofer - Midrange – Tweeter Frequency response - below 25 - 30 kHz Sound Pressure Level: 115 dB at 4 meter listening position in a 14 by 27 foot room utilizing 100 watt amplifiers, bi-amped. Nominal Impedance: Dimensions: 4 ohms 80 ½” x 35” x 4” Weight: 300 lbs. (Net weight for one speaker with interface box) Warranty: 5 yr. limited warranty, see statement for details.
LOW IMPEDANCE DIRECT DRIVE Introduction & Description The APOGEE Acoustics Direct Drive is an alternate embodiment of the speaker. It is intended to take advantage of certain low power Class A Amplifiers with exceptional sonic merits, and still provide adequate dynamic range for most music. These amplifiers are capable of driving a 1 ohm load with no problem. If you have questions as to the adequacy of a particular product, consult your dealer or amplifier manufacturer.
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DIRECT DRIVE RETROFIT PROCEDURE The following assembly steps are to be done prior to hookup of the direct drive on those systems being retrofitted from the standard 4 OHM speaker: 1. Measure each midrange cable and mark at 10½” with a black magic marker. (Black and white lugs) 2. Check to make sure that you have selected the midrange. 3. Cut the white wire at the mark. Do not cut the black lead at this time. 4.
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