The Web browser-based UI allows you to configure and monitor LEA amplifiers. It is a fast and efficient way to monitor and control hardware devices without the need to download or install software.
Please refer to the LEA Connect: Getting Connected article firstly to understand how to initially connect to your amplifier(s). You can access this article via https://support.polar.uk.com/support/solutions/articles/25000024414-lea-connect-getting-connected. You can connect to the amplifier via PC, phone or tablet. Functionality is the same on all devices although layout may differ. However, with PC you can view multiple channels at once.
CONNECT SERIES amplifiers automatically detect each other on a network. Opening the Web UI for one amplifier will display all available amplifiers on the network. It is possible to search for a particular amplifier by name and all amplifiers can be sorted by either Name or Faults:
There are various icons which will be visible on the main page which direct to different pages. Click on the name of the amplifier.
At the top of each page you have access to the output levels and mute control of each channel. There is a meter and dB value relating to the current signal level and attentuation respectively. Indicator LEDs inform the fault state, thermal state, limiting, ready state and whether the signal clips.
At the bottom of each page, you can select the relevant channel number to access its settings. For example, 2 channels are shown here. It is possible to set up the inputs quickly this way.
INPUT SOURCE SELECT MODE
- Primary and Secondary Inputs can be attenuated here and named accordingly.
- Sensitivity Selection of 26 dB/34 dB.
- Override Mode:
- Auto Override Primary Input: “Any signal on the Secondary Input signal will override the Primary Input Signal.”. For example, Dante as primary and analogue as secondary both with same signal. If Dante disappears, analogue takes over.
- Signal Sensing Override : “If Primary Input signal is lost or drops to a low level, Secondary Input signal takes over.”. For example, if primary input is BGM/Paging and secondary is an emergency evacuation alert, if anything is sensed on the secondary then the primary disappears and secondary takes over.
- The channel name can be renamed here.
- Low/High impedance. When using high impedance mode, there is a high-pass crossover adjustment available which allows you to prevent saturating the transformers in the loudspeakers.
- Smart Power Bridge Enabled. Choose a single channel to provide double the power out of.
- Sine, white noise and pink noise. The signal generator is useful for testing the system when there isn’t an input source present. The signal chain can therefore be tested for issues between the amplifier and the end of the signal path. The signal generator runs independently of the input source.
- The main gain slider controls the band pass gain.
- Up to 100 ms of delay can be added per channel.
- Polarity can be set to positive or negative.
- Speaker tunings can be imported and exported.
- Low pass filter. There are many filter types available:
- High pass filter. The same filter options as the low pass filter are available.
- 8 parametric equalisers per channel with gain, frequency and Q parameters each. Alternatively low pass or high pass shelves can be applied:
- The Peak Limiter prevents speakers from extending past their maximum excursion point. It focuses on taming transients.
- The RMS Limiter prevents speakers from being overpowered long term. This helps to prevent heat and burning up the speaker coil.
- Each limiter has threshold, attack and release parameters which are adjustable.
- There is feedback in dB for the Speaker Limiter and Protection Limiter.
- There is feedback for the Amp Output (Watts RMS).
- Indicators will light if there is gain reduction being applied to ensure speaker and/or amplifier protection.
- Monitor the impedance at the output of the amplifier. If there is a dead short, then this would result in 0 or a very low impedance. If open, then a high impedance would be reported back.
- A low (impedance) limit can be set for the monitoring. The high limit is set at 40 ohms.
- A pilot tone can be set up to allow a user to looking into variance in the measured impedance.
- Readings for the power supply AC Line Voltage and AC Line Current are shown.
- Indicator LEDs reflect a fault or thermal issue on the power supply and whether the power is suitable.
- Auto Standby can be enabled here. A threshold (dBFS) and wait time (minutes) are defined.
- AC Fault Limits can be auto enabled.
- There are 3 potential power states which may show:
- The amplifier is completely powered up.
- The amplifier is in auto-standby.
- The amplifier is in remote/on/off mode and has PoE active.
- Tap on the emoji to get redirected to a page relevant to it's current state. The emoji will be different dependent on the current state:
- Happy: No problems. Clicking will direct to the last visited page.
- Frown: An event is present. Clicking will direct to the Events Log page.
- Shocked: A fault is present. Clicking will direct to the Faults Log page.
- Indicates whether the amplifier is on the wireless access point or Ethernet connection. The page allows the ability to change the mode:
- The amplifier is connected via the WiFi Access Point of the venue's WiFi.
- The amplifier is connected via the Ethernet connection on the rear of the unit.
- DHCP or static IP address assignment is available.
- On this page you can see which channels are muted. Channels can be (un)muted altogether. There are 3 mute states:
No channels are muted.
All channels are muted.
Some channels are muted, some aren't.
- Here you can see the real time power usage of the amplifier (W).
- Auto standby can be enabled. The threshold and wait time have modifiable parameters. The estimated power usage when in auto standby is shown.
- An indicator LED relays the PoE status.
- The estimated power usage when in standby with PoE is shown.
- CONNECT AMP TO ACCOUNT: Users can link up the amplifier to their LEA account.
- CHANNELS: Directs to the Channel Settings page.
- AMP SETTINGS: Offers an amplifier locator. The amplifier can be password protected, if you log in without the password there is a guest mode with the ability to read but not write. Details regarding the amplifier can be entered which may be useful for an integrator to refer to:
- Device Name
- Venue Name
- Model ID
- Asset Tag Number
- Installer Name
- Installer Contact Info
- Date of Installation
- Rack Name
- Rack Position.
- EVENTS: Logs are recording to report anything which is out of tolerance. It's not necessarily something that is wrong with the amplifier. The events can be cleared or forwarded on via e-mail.
- FAULTS: Something is outside the tolerance of the amplifier. A dead short for example or if the AC Line voltage drops. The faults can be cleared or forwarded on via e-mail.
- POWER SUPPLY: Directs to the Power Supply page.
- NETWORK: Directs to the Network page.
- ADVANCED: Import/Export amp settings. Import allows the choice to import Network Settings, Amp Settings and Channel Settings.
- The light bulb icon in the top-right of the window enables light or dark mode to suit the user's preference.
- The hamburger menu in the top-right of the window provides access to install a Firmware Update. Additionally, Help & Feedback offers LEA contact details and shows any set installer details.
- The amplifiers have a secure API that allows TCP-based control software to access the amplifier. It uses websockets which makes use of the reliability of TCP and the notion of message boundaries. The API is patterned after JSON-RPC 2.0 which makes it friendly to read and implement. Plugins are currently being developed for popular control software applications. 3rd party APIs are available at http://www.leaprofessional.com/products. Alternatively, if an API is to be requested, send an e-mail to firstname.lastname@example.org.