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Summary of Contents for Legacy Thumper
- Page 2 Registration 3. Owners Record 4. The Cabinetry / Our Commitment Setup 5. Unpacking Your Speakers 6. Speaker Placement / Installation 8. Hook up Cables 10. Speaker Connections Technology 13. Designer’s Note 15. Specifications...
- Page 3 The model and serial numbers are located on the rear of the unit. Record these numbers in the spaces provided below. Refer to them when calling upon your dealer regarding this product. Model No. _______________________________ Serial No. _______________________________ Date of purchase: _________________________ Thank you for selecting a Legacy Loudspeaker System.
- Page 4 Handcrafted Beneath the surface of Marquis’s elegant exterior lies rigid MDF construction. Interlocking joinery maximizes the strength of the cabinet parts. Polyester fiberfill is selected for internal damping. A sharp rap on the enclosure will leave you with little more than bruised knuckles. Each cabinet is impeccably finished on all exposed surfaces with select veneers.
- Page 5 Your new subwoofer has been very carefully packaged to insure that it travels to you safely. Each subwoofer is protected by a double-wall outer carton with heavy V-board corner protectors. Molded foam end caps are used to protect the elegant cabinetry, and a plastic liner is provided as waterproofing.
- Page 6 Since the human ear is rather poor at localizing radiation frequencies below 125 Hz, good results may be obtained in a variety of room placements. Careful adjustment of the convenient front panel controls will lead to seamless transition. Low frequency reinforcement occurs whenever woofers are placed near room boundaries.
- Page 7 Now, while such reinforcement might actually be beneficial at very low frequencies, excessive excitation can cause “overhang” or a droning effect at mid- bass frequencies. A way to minimize excitation of these resonances is to place your subwoofer asymmetrically relative to room boundaries. For instance, if the subwoofer is 2 ft from one corner wall, then place it 1.5 ft to 3 ft from the other.
- Page 8 The ideal conductor would have negligible resistance, inductance and capacitance. The table below shows how a few actual speaker cables measure up. Cable Ωs/ft pF/ft µH/ft 12 ga. 0.0033 0.21 14 ga. 0.0048 0.13 16 ga. 0.0079 0.18 18 ga. 0.0128 0.21 Capacitance is considered insignificant in each cable because its effect is...
- Page 9 What about phase shift due to frequency dependent travel times down the speaker cable? Measurements show that 100 Hz waves will be delayed about 20 billionths of a second behind 10 kHz waves when traveling to the end of a 10 foot speaker cable. Since the cilia of the ear requires 25,000 times longer than this just to transmit phase information, phase shifting is obviously not the primary concern when considering speaker cables.
- Page 10 Once you’ve found a place in your room, the next step is to connect Thumper to your system. There are a variety of ways this can be accomplished, all of which will be listed and explained. Option 1: Connecting the Thumper using the Low Level Inputs (from preamp/processor).
- Page 11 Option 2: Connecting the Thumper using a STEP One or Whisper Environmental Processor. If you are using a Legacy Audio StepOne or a Whisper controller in your system: Stereo Amplifying: In a stereo configuration, the output from the preamplifier feeds the inputs of the StepOne/Whisper Processor and the variable outputs of the StepOne/Whisper Processor feed into the stereo amplifier.
- Page 12 Option 3: Connecting the Thumper using the High Level Inputs (from amplifier). A. If using the high level inputs (fig. 1), it is highly recommended that you connect them in parallel with your main left and right loudspeakers. B. One may decrease the low frequency demands from the main left and right speakers by connecting them to the binding posts labeled High Level Out.
- Page 13 Powering Up Thumper See figure 1 (Thumper back amp module plate) 1. Power Cable: The supplied power cable will plug into a socket on the back terminal plate of the unit. NOTE: Try to plug into the same AC circuit as the rest of your audio system, as this will avoid hum from ground loops.
- Page 14 This unit is bolted in compression to secure nearly 20 lbs. of motor structure. • A high current 200 watt amplifier maintains control of Thumper’s 12” sub- bass piston. • Thumper features automatic turn on/off when presented with an audio signal.
- Page 15 System Type: Vented enclosure. Driver: Dual 12” Carbon reinforced pulp. Alignment: 5th order. Amplification: 200 watts. Low Pass Crossover: 40 - 180 Hz. Low Pass Filter Slope: 18 dB per octave. Maximum SPL: 112 dB @ 40 Hz. High Pass Crossover: 85 Hz @ 6 ohms. High Pass Slope: 12 dB per octave.
- Page 16 Notes:...
- Page 17 © 2003 Legacy Audio 150 Locust Street. Macungie, PA 18062 Phone: 610 965 0494 Fax: 610 965 4915...
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