The following information is for Tortuga Audio preamps based on the V2 preamp controller with a 7-segment LED display. If you have a V25 preamp please consult the main page for a separate section on V25 controls.
Some V25 preamps also use 7-segment displays. There are 3 ways to tell if your preamp is using the V25 controller instead of a V2.
7-segment LED displays are able to show numbers only by turning on and off a combinations of 7 individual LED segments. They are inherently easy to read high-contrast displays and are relatively easy to control.
Tortuga Audio V2 (and some earlier V25) preamps use a pair of double digit 7-segment display modules as shown below. Each module can show a number from 0 to 99. In default volume control mode, the left module represents the left channel’s volume and the right module represents the right channel’s volume. If there are differences in the two numbers this indicates either a left or right adjustment in channel balance. Volume is controlled in discrete steps with each step up or down shown on the 7-segment display modules.
Customer feedback and user experience after initial deployment of the V2 preamp controller eventually lead to some significant changes to the V2 controls. The earlier original control scheme is referred to as version “2.1” with a 3 digit firmware version numbering system 2.1.x. The later control scheme is referred to as version “2.2” with a similar 3 digit firmware version numbering system 2.2.x. Version 2.2 was introduced on May 15, 2016. All V2 based preamps produced after this date use the version 2.2 control scheme.
You can determine which firmware version you have by watching the display when you plug in or turn on power to the preamp. As the preamp boots up it will first display 3 numbers. These numbers will be either 2.2.x or 2.1.x where “X” is a subversion. If the first 2 numbers are 22 then you have firmware version 2.2.
Owners with a 2.1 version are encouraged to upgrade their firmware to 2.2 which is arguably a better organized and easier more intuitive control scheme compared to the earlier 2.1 version.
Release of the version 2.2 firmware included the following major changes from the earlier version 2.1.
The V2 control scheme is designed around the Apple Remote. The Apple Remote is a simple 7 button infrared remote as shown below. The control functions of each button will vary depending on whether the preamp is turned on or off and depending on the current control mode of the preamp.
The control functions are presented below 3 different ways; visually with text, as a list of the control functions and as a list of control buttons. It is left to user to determine which is most useful.
In addition to the default volume control mode discussed above there are 4 additional control modes that are enabled using the control mode select button. Each these 4 control modes are explained below.
The control scheme described below is applicable to any V2 based LDR preamp with earlier version 2.1.x firmware. Owners are encouraged to update their firmware to latest version of 2.2 after which you should refer to Apple Remote 2.2. section above.
Version 2.1 control functions of the Apple Remote are shown in the 2 tables below. The first table describes the control functions and modes. The second table summarizes how each control button relates to the control function.
Right display shows brightness level between 0 and 15. Use Raise/Lower buttons to adjust brightness. Press Enter button again to confirm/save new setting, exit Brightness Adjust mode and return unit to Volume Adjust mode.
The Apple Remote does not repeatedly send commands if you hold down the Raise or Lower buttons to adjust volume. Therefore each Raise/Lower button press increments/decrements the volume by 1 step count only.
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