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Summary of Contents for monolith Alex Cavalli Liquid Gold X
- Page 1 Liquid Gold X Balanced Headphone Amplifier and DAC by Alex Cavalli P/N 38967 User's Manual...
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Page 2: Safety Warnings And Guidelines
SAFETY WARNINGS AND GUIDELINES Please read this entire manual before using this device, paying extra attention to these safety warnings and guidelines. Please keep this manual in a safe place for future reference. This device is intended for indoor use only. •... - Page 3 area where it can get sufficient airflow to keep from overheating. Do not place or install this device in an area where it • can be exposed to excessive amounts of dust, humidity, oil, smoke, or combustible vapors. Use only in a well-ventilated area. Do not use in close, •...
- Page 4 become tangled with other cords. Ensure that the power cord does not present a tripping hazard. Never unplug the unit by pulling on the power cord. • Always grasp the connector head or adapter body. Ensure that power is turned off and disconnected •...
- Page 5 The unbalanced input has an internal, solid state buffered phase splitter to create a balanced signal and drive the amp fully balanced. The Monolith Liquid Gold X amplifier includes its own built-in, fully balanced DAC with USB, Coaxial, and Optical inputs.
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Page 6: Customer Service
Please take an inventory of the package contents to ensure you have all the items listed below. If anything is missing or damaged, please contact Monoprice Customer Service for a replacement. 1x Monolith™ Liquid Gold X Amplifier and DAC 1x AC Power Adapter 1x User's Manual... -
Page 7: Product Overview
PRODUCT OVERVIEW Front Panel POWER: Momentarily press the button to signal the MCU to turn the amplifier on or off. SE: Unbalanced TRS headphone output. B: Balanced 4-pin XLR headphone output. STATUS LED: The LED illuminates or blinks red and/or white to indicate a normal operating or fault condition. - Page 8 DAC SELECT: Momentarily press the button to cycle through the DAC inputs. When power is first connected, it defaults to the USB input. The cycle order is USB, Coaxial, and Optical, then back to USB. INPUT SELECT: Momentarily press the button to cycle through the inputs.
- Page 9 Rear Panel 11. BAL: Balanced XLR inputs. 12. SE: Unbalanced RCA inputs. 13. USB: USB digital audio DAC input. 14. COAX: Coaxial digital audio DAC input. 15. OPTICAL: Optical digital audio DAC input. 16. AUTO/OFF: This switch enables or disables the auto-off feature.
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Page 10: Blink Codes
BLINK CODES CONDITION STATUS LED Blinks red (0.5 sec on, 0.5 sec Normal Power Off off) 5 times Blinks white (0.1 sec on, 0.1 Ground Failure sec off) 75 times Blinks red (0.1 sec on, 0.1 sec DC Offset Failure off) 75 times Blinks white (1 sec on, 1 sec EU Shutdown Final Minute... - Page 11 Refer to the BLINK CODES section for details. Please review this section before attempting to operate the Monolith™ Liquid Gold X amplifier. DC Plug-In Delay The Monolith™ Liquid Gold X amplifier has several built-in delays to ensure that all DC voltages are in their proper ranges before allowing you to power up and connect headphones.
- Page 12 MCU determines that the DC source is within acceptable range. Pushing the power button will only cause the LED blink cycle to be repeated. If the DC power is detected out of range, unplug the AC power adapter for 30 seconds, then plug it back in to reset the MCU. If no blink code is shown after 3 seconds, press and release the POWER button.
- Page 13 (relay click) and the STATUS LED will change from red to white. If the DC offset is not acceptable the MCU will power down the amp and show an offset failure. If the amp consistently shuts down during power up due to offset failure, please contact Monoprice™...
- Page 14 If the input signal falls below a very low threshold continuously for 4 hours, the MCU will power down the amp to save electricity. If an audio signal is detected at any time, the timer will reset. If the AUTO/OFF switch is set to the OFF position during the countdown, the timer will reset.
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Page 15: Gain Setting
Firmware Enters Unknown State In the event a critical failure occurs and the firmware enters an unknown condition, it will power down the amp and indicate this condition with a specific blink code. Unplug the AC power adapter for 30 seconds, then plug it back in to reset the MCU. If this condition persists, please contact Monoprice™... -
Page 16: Electrical Connections
Connecting Headphones While Audio is Playing Under many conditions, if you plug or unplug your headphones while the amp is delivering power, you will trip the output offset detector. This is the MCU protecting the amp from damage. This condition is likely to occur more frequently when using the TRS output because of the output shorting that occurs when the TRS plug is inserted into the jack. - Page 17 Amplifier Break-In Most amplifiers need at least 100 hours of continuous music playback to reach their full sound signature. It is not necessary to set up a break-in period. The amp will change character as you listen normally and you will hear it evolve into its natural sound signature.
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Page 18: Power Source
of the amp. Remember that the unbalanced output is provided for convenience only. Power Source This amplifier is supplied with a universal AC power adapter, which can operate with voltages from 100 ~ 240 VAC, 50/60 Hz. It has a NEMA® 1-15 plug for use with standard US AC outlets, but will work with a physical adapter suitable for your location. -
Page 19: Technical Support
TECHNICAL SUPPORT Monoprice is pleased to provide free, live, online technical support to assist you with any questions you may have about installation, setup, troubleshooting, or product recommendations. If you ever need assistance with your new product, please come online to talk to one of our friendly and knowledgeable Tech Support Associates. - Page 20 300 Ohms 0.820 15.68 Maximum Output Single Watts Ended (voltage for ≈ 1% THD) 33 Ohms 1.769 7.64 56 Ohms 1.109 7.88 150 Ohms 0.448 8.20 300 Ohms 0.231 8.32 Crosstalk (@1kHz 1 Vrms input unit gain balanced -88dB in/out) Channel Balance (with pot at 0.1dB unit gain balanced out)
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Page 21: Analog Inputs
Analog Inputs THD+N 0.0012% THD+N @ 1kHz 0.0023% IMD CCIF (1 V output) 0.00019% IMD CCIF (5 V output) 0.00019% IMD SMPTE (1 V output) 0.00025% Noise (unweighted 20Hz~22kHz, balanced 47 -101dB ohm load, high gain) Noise (unweighted 20Hz~22kHz, balanced 47 -103dB ohm load, low gain) Noise (relative to 1 V... - Page 22 DAC Inputs THD+N 0.0028% THD+N @ 1kHz 0.0025% IMD CCIF (1 V output) 0.00115% IMD CCIF (5 V output) 0.00223% IMD SMPTE (1 V output) 0.00025% Noise (unweighted 20Hz~22kHz, balanced 47 -91.7dB ohm load, high gain) Noise (unweighted 20Hz~22kHz, balanced 47 -96.1dB ohm load, low gain)
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Page 23: Regulatory Compliance
REGULATORY COMPLIANCE Notice for FCC This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. -
Page 24: Notice For Industry Canada
installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. -
Page 25: Eu Declaration Of Conformity
EU Declaration of Conformity Monoprice, Inc. declares the product described within this user guide or manual is in compliance with below applicable directives. The full text of the EU Declaration of Conformity is available at the following internet address: https://www.monoprice.com/product?p_id=38967 or the CE DoC can be found within this user manual. - Page 26 products. Consumers are required to comply with this notice for all electronic products bearing the following symbol: For Consumers in the European Union: This EU Directive requires that the product bearing this symbol and or its packaging must not be disposed of with unsorted municipal waste.
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Page 27: Safety Notice
The power outlet must be located nearby the equipment and its access must be easy. Monoprice™, Monolith™, all Monoprice logos, and the Monolith logo are trademarks of Monoprice Inc. NEMA® is a registered trademark of National Electrical...
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