The Technical Pro LZ10K is a professional power amplifier designed to provide high-quality audio amplification for a wide range of applications. It is part of Technical Pro's L-Series 2U Professional Amplifier line, known for producing extremely high power levels.
Function Description:
The LZ10K serves as a central component in an audio system, taking a low-level audio signal and amplifying it to drive loudspeakers. It supports both stereo and bridge-mono operating modes, offering flexibility for different audio setups. In stereo mode, it amplifies two independent audio channels, while in bridge-mono mode, it combines the power of both channels to deliver a single, more powerful output, typically for a subwoofer or a single high-power speaker. The amplifier features front panel controls for easy setup and use, including individual level controls for each channel, and indicators for power, signal, clip, and protection status.
Important Technical Specifications:
- Model: LZ10K
- Peak Power: 10,000 Watts
- Dimensions: 19" (width) x 3.5" (height) x 14.5" (depth)
- Rack Size: Standard 2U (3.5 inches high) for 19-inch equipment racks.
- Input Connectors: 1/4-inch (6.35-mm) phone jacks and 3-pin XLR connectors. Both balanced and unbalanced wiring are supported.
- Output Connectors: Speakon™ connectors, banana post outputs (for banana plugs, spade plugs, or bare wires).
- Power Select: 50Hz/60Hz switch for power frequency selection.
- Cooling: Features a cooling fan to ensure proper thermal management.
- Indicators: Front panel LCD display indicating level, clip, protection, and temperature of both channels. Separate LED indicators for power, signal, protect, and clip for each channel.
- Operating Modes: Stereo and Bridge-Mono.
- Grounding: Includes a grounding switch.
Usage Features:
- Easy Setup: Front panel controls and clear indicators simplify the setup process.
- Flexible Input Options: Supports both XLR and 1/4-inch inputs, allowing connection to a variety of audio sources. Users can choose between balanced and unbalanced wiring depending on their setup and cable length requirements. For balanced wiring, pin assignments for XLR and phone connectors are provided (GND, +, -). For unbalanced wiring, pin assignments for XLR and phone connectors are also detailed (SHIELD, INPUT, SHIELD).
- Versatile Output Connections: Offers Speakon™ connectors for secure and high-quality speaker connections, as well as banana post outputs for compatibility with banana plugs, spade plugs, or bare speaker wires.
- Speaker Wire Gauge Guidelines: The manual provides a table recommending appropriate speaker wire gauges based on the distance from the amplifier to the speaker, ranging from 16 gauge for distances up to 25 ft to 6 gauge for distances up to 250 ft. This helps users ensure optimal power delivery and minimize signal loss.
- Stereo Mode Operation: In stereo mode, input wiring is connected to each desired channel using either XLR or 1/4" jacks (not simultaneously on a single channel). Output wiring involves connecting banana plugs vertically in the CH.1 jacks, ensuring proper positive/negative polarity for both channels when connecting to speakers.
- Bridge-Mono Mode Operation: For higher power output, the amplifier can be switched to bridge-mono mode. In this configuration, input wiring is connected only to CH.1, and the speaker is connected across the positive (+) output terminals. It is crucial to turn down the Channel 2 level control as Channel 1 then controls both channels.
- Input Parallelization: The manual describes two methods to feed the same signal to both amplifier channels: using a "Y" cable or by feeding the signal to Channel-1 input screw terminals and connecting Channel-1 combo jack to Channel-2 combo jack with a mic or phone-to-phone cable.
- Rack Mountable: Designed for standard 19-inch equipment racks, allowing for organized and secure installation in professional audio setups. It can also be stacked without a cabinet.
- Cooling System: Integrated cooling fan prevents overheating, ensuring stable performance during prolonged use. Proper airflow is emphasized, advising against blocking front or rear air vents and recommending closing open spaces in the rack with blank panels.
- Safety Instructions: Users are warned to disconnect the amplifier from the power source, set the power switch to "off," and turn down all level controls before installation or wiring.
Maintenance Features:
- Proper Cooling: Maintaining proper cooling is crucial for the amplifier's longevity. Users are instructed not to block air vents and to ensure adequate airflow through the rack.
- Shipping and Storage: It is recommended to save all original packing materials for safe transport of the unit. Amplifiers should be supported at both the front and back when being transported.
- Wiring Precautions: Custom wiring should only be performed by qualified personnel. Users are cautioned never to use unshielded cable for output wiring.
- Warranty: Technical Pro offers a limited warranty, covering defects in materials or factory workmanship for 90 days from the original purchase date. The warranty requires proper use of the product and excludes damage from abuse, accidents, misuse, modifications, neglect, tampering, electrical stress, cosmetic damage, illegible serial numbers, or improper adjustments/installations. For warranty service, the unit must be returned to Technical Pro's Return Department in its original packaging, accompanied by a sales receipt, proof of purchase, and a detailed explanation of the defect. A handling and return postage fee of $39.99 is required. The warranty explicitly limits Technical Pro's liability to repair or replacement and excludes incidental or consequential damages.
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