The following information is for Tortuga Audio preamps based on the V25 preamp controller (released April 2017) with 7-segment LED display. If you have a preamp with the newer OLED graphic display please consult the main page for a separate section on V25 controls with OLED display.
The Apple Remote shown below is Apple’s standard “silver” remote. It’s a simple 7 button IR remote. The control functions of each button will vary depending on the control mode the preamp is in as explained below.
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 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.
The control scheme for the V25 with 7-segment display is organized into a collection of control modes. The numerical information displayed will mean something different depending on which mode the controller is in. Unfortunately, it’s not intuitively obvious what control mode the controller is in so it’s up to the user to maintain situational awareness. The good news is that pressing the Center button on the remote will always cause the controls to revert back to the default volume control mode.
V25 preamps with 7-segment displays that are updated to the 2xx series OLED firmware have the following changes to their control behavior that differs from what is described herein. Please note that these changes are NOT reflected in the detailed control instructions presented below which reflect the original 7-segment only version of the V25 firmware. Again, the differences are only in assignment of the Mode and Mute buttons on the Apple remote. These changes were made so that the controls would be consistent between the 7-segment and OLED displays going forward. Apologies for any inconvenience.
Mode Button – The “Menu” button on the lower left of the remote is now the Mode button. As before, the Menu button also turns the preamp on when it’s off.
Mute Button – The lower right button of the remote (with the >= play/pause symbol) is now the Mute button.
There are six (6) control modes with Volume Adjust mode always being the default. The six control modes are listed below followed by a table that further explains each one. Further below each of these modes are discussed again using a more graphic approach.
Navigation between the control modes is done with the Apple remote in accordance with the following simple rules:
Each of the remote control functions and control modes are shown below in a mock-up of the dual displays.
Preamps with versions 1019 or higher firmware do not have to wait for the mute ramp down to zero to complete before pressing the lower button. A quick tap of the Mute->Lower buttons will shut off the preamp.
Important! – Preamps with only a single input will only have four (4) controls modes since the Input Adjust mode is disabled.
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