Elura Black Label Series Amplifiers

Overview

Thank you for purchasing Elura amplifier products. Elura is a high-performance custom-installed product engineered for commercial sound installations. Each Elura product is manufactured to the highest quality standard using state-of-the-art components and built for years of enjoyment.

Features

• Multi-channel/multi-zone
• Digital high power amplification
• Speaker outputs of 4 and 8 Ohms
• Global BUS IN and independent channel line inputs
• All 36 or 8 zones bridgeable (depending on model)
• SUB OUT with variable crossover on each zone
• 2U Rack mountable
• Auto-On and Trigger-On functionality
• Front panel level controls with removable security cover
• Zone status LEDs
• BUS output for linking amplifiers
• Short circuit protected
• AC 110/220V 50-60Hz (switchable) power supply system

Contents

• Amplifier
• Power Cord
• (2) Rack Mountable Ears
• (6) Rack Ear Mount Screws
• Manual

Front & Rear Overview

This section details the various controls and indicators on the front and rear panels of the amplifiers.

1. Master Power Button & LED Indicator

The power button is on the front panel. When pushed "ON", the amplifier enters standby mode, and the LED indicator turns red. The Auto/On/Trigger selector on the rear can be set to on, auto, or trigger mode. Once the LED indicator turns blue, the amplifier is fully active. The master power button can turn off the amplifier regardless of the remote turn-on switch position. When the power button LED is not illuminated, the amplifier is completely off and not receiving power.

2. Zone Status LED Indicators

Each pair of channels or zones has a red and blue LED to indicate operational status for troubleshooting. If circuitry detects excessive heat or low impedance (short circuit) on a channel, only that affected channel(s) will shut down, turning its zone LED red. Other zones remain blue. Once the issue is corrected, the LED returns to blue. The unit is in standby mode when the power LED is red and zone status LEDs are off or not illuminated.

3. BUS Line RCA Inputs & Outputs

The amplifiers feature a pair of BUS line inputs for receiving audio signals from standard line-level sources and transmitting them to any or all amplifier channels. A pair of BUS line outputs is also provided for sending signals to additional amplifiers. High-quality, low-impedance, shielded RCA cables with high-quality connectors are recommended for optimal performance. Utilizing the BUS INPUTS/OUTPUTS can achieve a "MONO" signal to all channels.

4. Individual Line RCA Inputs

All channels have dedicated line RCA inputs for connecting audio sources independently of the common BUS line inputs.

5. Input Selector

Each channel can select its source signal from multiple inputs: BUS 1, BUS 2, and LINE IN. Use the input selection switch for the respective channel to choose between BUS 1 (source connected to BUS 1 input), BUS 2 (source connected to BUS 2 input), or LINE IN (source connected to the channel's LINE IN).

6. Channel Level/Gain Control

Each zone has an independent level adjustment to set the output volume, preventing clipping or overdrive that could damage speakers or the amplifier.

7. Stereo & Bridging Selector Switch

This switch allows combining two channels (bridging) on a zone for increased power output, useful for zones requiring extra power. The minimum impedance for bridged channels is 8 Ohms, and proper speaker wiring is crucial. The left channel controls input selection and volume for bridged channels. "BR" indicates bridged mode, and "ST" indicates stereo mode. Ensure the amplifier is off before switching modes.

8. Subwoofer RCA Outputs

Each zone has a subwoofer RCA output. This can connect to an active/powered subwoofer, a subwoofer amplifier, or be used to send a single RCA cable from the SUB OUT of one zone to the LINE IN LEFT channel of the next zone.

9. Crossover for Subwoofer Outputs

Each zone features an independent crossover knob with a variable Low Pass Filter (LPF) adjustable from 40Hz-140Hz. This setting allows frequencies below the chosen cutoff to pass, ensuring seamless blending with other speakers and preventing unwanted frequencies.

10. Ground Lift Selector Switch

This switch helps address unwanted ground-related noise caused by ground loops in audio cables. Adjusting the switch can reduce or eliminate audible hum or buzz.

11. Switchable 110/220V Input Voltage

The amplifiers operate on both 110V and 220V. Ensure the voltage selector switch is set correctly before powering on. When operating at 220V, the internal fuse in the IEC socket must also be changed.

12. IEC Power Connector

A fused IEC power inlet allows for flexible power cable changes for different countries. The main fuse holder is located beneath the IEC inlet and can be accessed with a flathead screwdriver. Avoid plugging the amplifier's power cable into a switched outlet. Use Trigger or Auto power modes for the amplifier to turn on with an AV receiver.

13. 5.2V/2A USB Port

An integrated USB port provides power to external devices like wireless audio connectivity adapters. This port serves only as a power source and does not support data transfer or media functions.

14. Trigger Input & Output

The trigger input (3.5mm mini plug jack) accepts 3.3-12V AC/DC from another device or power supply to activate the amplifier from standby to ON mode. If an AV receiver lacks a trigger output, a 12V wall wart can be used. The trigger output (12V DC @ 50mA max.) can control other audio system devices.

15. On/Auto/Trigger Selector Switch

On Mode: Amplifier controlled by the front panel power button.

Auto Mode: Detects audio signals and switches on automatically. Enters standby after approximately 20 minutes of no audio signal. A 10-15 second delay occurs before audio resumes after waking.

Trigger Mode: Amplifier turns on/off via the 12V trigger input/output. A few seconds delay occurs after trigger activation before audio plays. For everyday use, the "ON" position is recommended. A 3.5mm MONO male-to-male cable is required for the 12V trigger feature; a STEREO cable will not work.

16. Speaker Output Terminals

High-quality Phoenix-style connectors are used for speaker connections. 14-18 gauge stranded two-conductor wire is recommended. Ensure proper polarity and wire separation. Maintain correct speaker wiring protocol when bridging channels.

Diagram Description (Figures 1-3): These figures visually represent the physical layout of the amplifiers, including rack-mounting options, front panel controls, and rear panel connections. Figure 1 shows the front panel with master power, zone LEDs, level controls, and input selectors. Figure 2 shows the rear panel with BUS inputs/outputs, individual line inputs, trigger connections, voltage selector, IEC power connector, and speaker terminals. Figure 3 illustrates the rack-mounting process, showing feet removal and ear attachment.

LED Indicators and Circuit Protection

Front Panel LED Reference Chart

Note: If a channel LED is RED, there is a fault requiring attention. It should turn BLUE when the zone is in use or OFF if not used. A common fault is positive and negative speaker wires touching. Once the issue is resolved, the indicator should return to BLUE.

Anti-Clipping Circuitry

If a clip LED indicator flashes, the zone is being clipped. The anti-clipping circuitry automatically reduces the output level to the speaker when the volume is too loud. The RED clipping LED flashes until the source volume or the input gain control for that zone is lowered.

Setup & Installation

Rack Mounting

The amplifier can be placed on a shelf or table with its attached feet. For rack mounting, remove the four feet from the bottom and attach the supplied rack ears using the provided screws. Ensure adequate space above and below the amplifier for proper ventilation.

Input Selection

Position the input selector for each channel to BUS 1, BUS 2, or LINE to specify the input source for that zone.

Speaker Connections

Each channel has speaker terminals accepting bare wire. Strip approximately a quarter inch of insulation from each wire and twist the strands. Use 14-18 gauge stranded two-conductor wire. Ensure correct polarity when wiring for STEREO or BRIDGED configurations. Adjust the ST & BR selector accordingly for all used channels.

12V Trigger Input

For remote turn-on from an external source (e.g., AV receiver), use a 3.5mm mono male-to-male cable (not stereo). Connect it from the external source to the 3.3-12V TRIGGER IN and set the switch to TRIGGER. The amplifier will turn on with the AV receiver. A 3.5mm mono cable can also connect the TRIGGER OUT to another device.

Input AC & Power Cord

The amplifiers operate on 110V and 220V. Before powering on, ensure the Input AC Selector is correctly set and the appropriate fuse is installed. Plug the AC power cord into the amplifier first, then into the wall outlet, ensuring a firm connection.

Fuse Holder Access

The fuse holder is located directly under the power socket. It contains an extra 10 Ampere, 250V fuse (for 115VAC) or 4A/250VAC (for 230VAC) depending on model and region. Ensure the amplifier is off and unplugged before accessing the fuse holder. Use a flathead screwdriver to pry off the cover.

Diagram Description (Figure 4): Figure 4 illustrates a typical multi-zone wiring example, showing how audio signals flow from a multi-zone preamp through the amplifiers to the speakers. It visually depicts the connections for multiple zones and emphasizes the need for correct STEREO/BRIDGE switch settings and impedance considerations.

Wiring Configurations

Standard 2-Channel Stereo Wiring

Diagram Description (Figure 5): This figure shows the standard stereo wiring for a single zone. It involves connecting the audio source to the RCA LINE IN or BUS INPUT, setting the input switch to the appropriate source, setting the ST/BR switch to ST (stereo), and attaching two speakers (left and right channel) to the phoenix connector.

Powered Subwoofer Wiring

Diagram Description (Figure 6 & 7): Figure 6 depicts wiring for a powered subwoofer. The source is connected, input and ST/BR switches are set to ST (stereo). A single RCA cable connects the SUB OUT of that zone to the powered subwoofer or subwoofer amplifier. The subwoofer crossover knob is set to 140Hz, and the crossover on the powered subwoofer is used. Figure 7 shows passive subwoofer wiring using a bridged output. The source is connected, input switch set, and a single RCA cable runs from the SUB OUT of one zone to the LINE IN LEFT of the next zone. Full-range speakers connect to the first zone's phoenix connector (set to ST). The passive subwoofer connects to the outermost portions of the phoenix connector on the subwoofer zone (set to BR for bridged). Crossover and gain knobs are adjusted for desired sound.

Passive Subwoofer Wiring Bridged Output

Note: The minimum impedance for bridging channels is 8 Ohms.

Dual Passive Subwoofer Wiring - Bridged Output

Diagram Description (Figure 8): This figure illustrates wiring for dual passive subwoofers using bridged outputs. Similar to single passive subwoofer wiring, a single RCA cable links SUB OUT to the next zone's LINE IN LEFT. Speakers connect to the first zone (set to ST). Dual passive subwoofers connect to the phoenix connectors on two separate subwoofer zones (set to BR for bridged). Crossover and gain knobs are adjusted.

Note: The minimum impedance for bridging channels on the amplifiers is 8 Ohms.

Outputting a Mono Signal Using BUS IN & OUT

Diagram Description (Figure 9): Figure 9 explains how to output a mono signal using the BUS IN and OUT features. It involves using an RCA Y-cable to combine left and right audio signals from the source and connecting it to the BUS 1 LEFT input. A single RCA cable then connects the BUS 1 LEFT output to the BUS 1 RIGHT input. To play the audio source through any speaker, the input selector for that channel must be set to BUS 1.

Connecting Multiple Amplifiers

Diagram Description (Figure 10): Figure 10 shows how to connect multiple amplifiers. An RCA cable runs from a BUS OUTPUT of amplifier 1 to a BUS INPUT of amplifier 2 to supply the source signal. Ensure the input selector switches on amplifier 2 are set to the correct BUS INPUT. If using the trigger feature, an additional 3.5mm trigger cable connects from the TRIGGER IN of amplifier 2.

Specifications

Maintenance

The following maintenance should be performed routinely:

1. Clean the exterior surfaces of the unit with a soft, dry, lint-free cloth.
2. Do not use alcohol, benzene, acetone-based cleaners, or strong commercial cleaners.
3. Do not use cloth made with steel wool or metal polish.
4. If the unit is exposed to a dusty environment, a low-pressure blower may be used to remove dust from its interior and exterior.

Troubleshooting

Elura amplifiers are designed to function trouble-free. Most problems are due to simple issues. If a problem occurs, check the list below. If the problem persists, contact the installer or MSTR Brand.

No audio from any channel

• Power cable to the amplifier is incorrectly connected or plugged into an outlet without power. Check connections and verify outlet power. Verify the power button on the front panel is "BLUE".
• Audio cable to the source component is not connected properly, connected to the incorrect BUS input, or the cable is defective. Check connections or replace the cable.
• The input selection switches are set incorrectly. Refer to instructions for correct settings.

No audio from one or more channels

• Audio cable to the source component is not connected properly or the cable is defective. Check connections or replace the cable.
• The input selection switch is positioned incorrectly. Refer to installation instructions for proper settings.
• The bridging switch is positioned incorrectly. Refer to installation instructions for proper settings.
• Check the connections of the speaker wire at both the speaker and amplifier.

No audio from one channel or one zone only

• Check the front panel LED for the zone that is not working. If it is "RED", there may be a short in one of the speaker wires for that zone. Check wires and speaker connections for shorts.
• The level adjustment on the channel is turned down. Turn it slowly to the right to raise the volume.
• Test the bad channel by connecting it to a speaker that is known to work.
• Audio cable to the source component is not connected properly or the cable is defective. Check connections or replace cable with one that has been verified as good.
• The input selection switch is positioned incorrectly. Refer to installation instructions for proper settings.
• The bridging switch is positioned incorrectly. Refer to installation instructions for proper settings.
• Check the connections of the speaker wire at both the speaker and amplifier.

Hum or buzzing sound is heard

• Check RCA input cables by removing them one at a time (powering down the amplifier before disconnecting) and checking if a connection or cable is to blame. Also, move the ground lift switch on the rear panel between "grounded" and "isolated" to determine which position provides the least hum.

Amplifier will not turn on

• The amplifier must be plugged into a live outlet.
• The power switch on the front panel must be on and "BLUE".
• Ensure 12V is present if using the trigger input, or that signal is applied if using the "AUTO" mode.
• Ensure that the power mode switch is set correctly for the desired power mode.

Front panel power button is inoperative

• Set the power mode switch to "POWER ON".

Product Warranty

The seller warrants the AMP100/6.2, AMP80/12, and/or AMP80/16 free from defects in material and workmanship for 2 years from the date of purchase from the seller or authorized dealer. Should this product fail to be in good working order within the warranty period, the product will be repaired or replaced provided that the unit has not been subjected to accident, disaster, abuse, or any unauthorized modification. This warranty is offered by the seller for its buyer with direct transaction only. This warranty does not apply to products that have been abused, incorrectly installed, modified, disassembled, and/or repaired by anyone other than Elura or its appointed repair facility. A unit that fails under conditions other than those covered will be repaired at the current price of parts and labor in effect at the time of repair. Such repairs are warranted for 90 days from the day of reshipment to the buyer. If the unit is delivered by mail, customers agree to insure the unit or assume the risk of loss or damage in transit. Under no circumstances will a unit be accepted without a return authorization number. The warranty is in lieu of all other warranties expressed or implied, including without limitations, any other implied warranty, all of which are expressly disclaimed. Proof of sale may be required in order to claim warranty.

The content of this manual has been carefully checked and is believed to be accurate. However, the seller assumes no responsibility for any inaccuracies that may be contained in this manual. Also, the technical information contained herein regarding the AMP100/6.2, AMP80/12, and/or AMP80/16 features and specifications are subject to change without further notice.

For more information, visit www.elura.com.