Owners Manual For The Xtreme HD Subwoofer System
Table of Contents Registration Owners Record The Cabinetry / Our Commitment Warranty Setup Unpacking Your Speakers Speaker Placement Hooking Up Cables Speaker Connections Fine Tuning Page 3 4 5 6 7-8 9-10 11-14 15-17 Technology Designer’s Notes Specifications 18 19 2
Owners Record The serial number is located on the rear of the unit. Record this number in the space provided below. Refer to this when calling your dealer regarding this product. Model: Xtreme HD Serial No: _________________________ Date of purchase: ___________________ Thank you for selecting a Legacy Loudspeaker System. These handcrafted instruments will provide you with many years of listening enjoyment.
The Cabinetry / Our Commitment Handcrafted Beneath the surface of Xtreme HD’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.
Warranty Legacy Audio supports its customers and products with pride. We cheerfully warrant our loudspeaker products we manufacture from defects in materials and workmanship for a period of seven (7) years. Electronic components such as internal amplifiers and digital processors are covered for three (3)years. Please register your product with Legacy Audio. Should you require service Legacy will require a proof of purchase in order to honor the warranty - so please keep your receipt.
Unpacking Your Speakers Your new speaker system has been very carefully packaged to insure that it travels to you safely. Each speaker is protected by a doublewall 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. Please save this packing for future transportation. If cartons become damaged or misplaced, new ones can be purchased from Legacy Audio.
Speaker Placement 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. The distance from the walls, floor and ceiling correspond to the wavelengths of the frequencies, which will reflect in phase and thus reinforce bass output.
Speaker Placement 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. Placing the subwoofer in a corner will reduce the radiation angle and thus increase efficiency.
Hooking Up Cables The ideal conductor would have negligible resistance, inductance and capacitance. The table below shows how a few actual speaker cables measure up. Cable 12 ga. 14 ga. 16 ga. 18 ga. Ωs/ft 0.0033 0.0048 0.0079 0.0128 pF/ft 24 17 16 28 µH/ft 0.21 0.13 0.18 0.21 Capacitance is considered insignificant in each cable because its effect is well out of the audio bandwidth; inductance can be decreased (at the expense of increased capacitance) by keeping the conductor pair closely spaced.
Hooking Up Cables 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. What about resistance? Finally we are getting somewhere.
Speaker Connections Once you’ve found a place in your room, the next step is connecting the Xtreme HD to your existing system. Listed below you will find 5 options. Option 1: Connecting the Xtreme HD using the LFE input. If your preamplifier/digital processor/receiver has a subwoofer output, it can be connected (via RCA cable) directly to the LFE (Low Frequency Effects) input (fig. 1).
Speaker Connections Option 2: Connecting the Xtreme HD using the stereo Low Level preamp/processor inputs. NOTE: if using the low-level inputs, we suggest using cables that are no longer than 5 meters. Longer lengths of RCA cable can result in greater noise and attenuation of the signal. If using Left/Right output jacks from the preamp, the internal circuit module of the Xtreme HD will sum the two channels together.
Speaker Connections Option 4: Connecting the Xtreme HD using a Wavelaunch Digital Signal Processor If you are using a Legacy Audio Wavelaunch Digital Signal Processor in your system, connect the LFE (or Subwoofer Out) output from the Surround Processor to Input 4 of the Wavelaunch processor. Output 7 of the Wavelaunch feed into the balanced input of the subwoofer.
Speaker Connections Powering Up Xtreme HD 1. Power Cable: The supplied power cable will plug into the 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. 2. Power Up: In the rear of the subwoofer to the immediate left of the power cable input is the power switch.
Fine Tuning Adjusting Xtreme HD On the front panel of the Xtreme HD you’ll notice four controls: Level, Freq., Blend, and Phase. These allow an extraordinary amount of control over your subwoofer. These controls will allow you to tailor the sound of the sub to your room and integrate with your main speakers. Level: This will allow you to adjust the volume level played by the subwoofer.
Fine Tuning Freq.: This control will allow you to adjust low frequency information. The crossover frequency range of the Xtreme HD is 45 - 150 Hz. Blend: The graph on the back panel of the Xtreme HD illustrates the effects of the Blend control. Turning the knob counter-clockwise reduces energy from the subwoofer in the range of 35-50 Hz. Turning the knob clockwise will increase gain in this area. This can reduce excessive energy or give more low frequency impact in this range depending on the setting.
Fine Tuning While seated at your listening position, have someone sweep the phase control slowly from one extreme to the other. Using pink noise or a 50-60 Hz test tone, listen for the strongest output. Now take note of that setting. Next, play music program material and optimize the level and phase settings further; adjusting for the smoothest output. NOTE: Because the LFE input bypasses the subwoofers internal crossover in favor of the preamp/processors crossover, the Freq.
Designer’s Notes (From Bill Dudleston) Xtreme HD is a carefully engineered subwoofer, capable of integrating with the finest speakers. • Unlike many woofers that suffer from overshoot, Xtreme HD applies a special EMF countering circuit, which increases power handling and radically reduces low frequency distortion. • An enormous stacked magnet structure is custom fabricated to provide excellent sensitivity. This unit is bolted in compression to secure nearly 40 lbs. of motor structure.
Specifications System Type: Subwoofer mass loaded, pneumatically coupled Drivers: 1 X 15” Active, 1 X 15” Passive Low Frequency Alignment: 6th Order/Back EMF Canceling Circuit Internal Amplification: 1000 watts, ICE Power Frequency Response: 16 Hz – 100 Hz Input Impedance: 10K Ohms minimum Phase Adjustment: Cont.
WEEE Compliance CE Declaration of Conformity Product Disposal— Certain international, national and/or local laws and/or regulations may apply regarding the disposal of this product. For further detailed information, please contact the retailer where you purchased this product or the Legacy Audio Distributor in your country. A listing of Legacy Audio Distributors can be found on the Legacy Audio website www.legacyaudio.com or by contacting Legacy Audio at: 3023 E. Sangamon Ave.
Notes: 21
©2012 Legacy Audio 3023 E Sangamon Ave.
