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LDR1 & LDR6 Operating Manual – Rev 1 

 

Tortuga Audio 

 

Page: 7 

 

will Un-Mute the unit. 

 

Input Select: 

In  Input Select Mode, turning  the  encoder will select the  next 

adjacent input corresponding to the direction of the turn.  

 

Balance Adjust:

 In Balance Adjust Mode, turning the Encoder clockwise will shift the 

balance weighting towards the right channel while turning it counter-clockwise will 

bias the balance towards the left channel. 

 

 Plugging It In 

The power supply has a 5 foot  cord that terminates at a 2.5 mm female barrel plug. 

Plug the “wallwart” head  into any nominal AC outlet and insert the barrel plug into 

the “12 VDC” jack in the rear panel of the LDR6.  

 

Each time the AC power supply unit is plugged in or energized while plugged  into 

the LRDx, the LED’s on the front panel of the LDRx  will flash briefly and then go dark 

indicating the unit has power and is ready to be used (although the unit will remain 

turned off until turned on). 

 

There is no power supply on/off switch on the LDRx.  The LDRx  is continuously 

powered. When the LDRx unit is turned off, the power draw is de diminimis  and the 

DCU reverts to a low power standby mode. 

 

Turning The Unit 

On 

Encoder Knob:

  When the unit is off (panel LEDs are all off) the unit can be turned 

on by momentarily pressing in and releasing the front panel Encoder Knob. Upon 

powering up all the LEDs will briefly flash leaving the Status LEDs lit at all times. On 

the LDR6 the LED corresponding to the currently selected input will also bit lit.  

 

Remote: 

The unit can also be turned on via the remote by momentarily pressing the 

red Power button on the remote.  

 

Turning The Unit 

Off 

Encoder Knob: 

When the unit is  on, the unit can be turned off by pressing and 

holding in the Encoder Knob for more than 2 seconds but less than 5 seconds before 

releasing.  All  the LEDs on the front panel will briefly flash and then go dark 

indicating the unit is now off.  

 

Remote:

 The unit can also be turned off via the remote by momentarily pressing the 

red Power button on the remote. As with the Encoder Knob, all the LEDs on the 

front panel will briefly flash and then go dark indicating the unit is now off.  

 

Controlling 

Volume 

Volume is adjusted via the Encoder Knob or via the Raise/Lower buttons on the 

Remote.  

 

When volume is adjusted down to minimum level (step 0) the unit is fully Muted 

(the input signal is effectively disconnected) and the Status LED blinks slowly.  

 

Similarly, the Status LED will also blink slowly when the volume is at 100% (step 70). 

There is no external counter or display indicating which step you are at between 

minimum (step 0) and maximum (step 70).  

Содержание LDR1

Страница 1: ...LDR1 LDR6 Operating Manual Rev 1 Tortuga Audio Operating Manual LDR1 LDR6 Passive Preamplifier January 2013 ...

Страница 2: ...sive Preamp 1 Audio Taper 1 Light Dependent Resistors LDR s 2 Power Supply 2 Inputs 2 Outputs 3 Encoder Remote 3 Front Panel 3 Rear Panel 3 Status LED 4 Off 4 On 4 On Blinking Slowly 4 On Blinking Rapidly 4 Flashing Briefly 4 Remote Functions 4 Power 4 Raise 4 Lower 4 Mute 4 LDR6 Only Input Select Keys 5 Balance 5 Reset 5 Infrared Protocol and Codes 5 Encoder Switch 6 Power On 6 Power Off 6 ...

Страница 3: ...LDR1 LDR6 Operating Manual Rev 1 Tortuga Audio Mute 6 Un Mute 6 LDR6 Only Input Select 6 Balance Adjust 6 Balance Reset 6 Encoder 6 Volume 6 Un Mute 6 Input Select 7 Balance Adjust 7 Plugging It In 7 ...

Страница 4: ...control Most preamplifiers also provides some degree of active amplification or buffering between the source device and the amplifier A truly passive preamplifier neither amplifies nor buffers The LDRx Passive Preamplifier is passive in the truest sense Perfectly manifested the perfect preamplifier does nothing to the audio signal other than to attenuate its strength i e control volume No colorati...

Страница 5: ...lume is controlled via four 4 analog light dependent resistors 2 per channel whose light intensities and thus resistance level are controlled by the DCU Power Supply The power supply is a high quality high reliability high efficiency 90 264 volt AC input 12 volt DC 1 Amp output regulated switching power unit It has built in overload short circuit and thermal protection and a built in EMI filter It...

Страница 6: ...e any other volume control knob turning it clockwise increases volume counter clockwise decreases volume The LDR1 uses the same remote as the LDR6 even though some of its buttons are irrelevant to the LDR1 such as the Input select buttons Front Panel LDRx The LDRx Front Panel has a single multi function black knurled Encoder Knob on the right hand side and a circular Infrared Lens cover on the lef...

Страница 7: ...Knob The Status LED conveys the following information Off The LDRx unit is off On The LDRx unit is on Un Muted and in Volume Adjust Mode default On Blinking Slowly The LDRx unit is on and is either Muted or at maximum Volume On Blinking Rapidly The LDRx unit is on and is in Balance Adjust Mode see Adjusting The Balance Flashing Briefly Indicates acceptance of new Input or new Balance Adjustment Re...

Страница 8: ...just Mode pressing the Left key will incrementally shift the Balance towards the left channel while pressing the Right key will shift the Balance towards the Right channel The Status LED will continue to blink rapidly Once the desired Balance has been achieved pressing the Enter key will lock in the Balance adjustment and the Status LED will flash briefly indicating the unit is now back in normal ...

Страница 9: ...ft right channel balance by rotating the encoder in the desired direction Once you ve adjusted the balance a brief push release will lock in the new balance setting and return the unit to normal Volume Control Mode Balance Reset A push hold for greater than 10 seconds followed by release will reset the Balance to zero upon release Encoder The Encoder Knob is a rotary switch Unlike a conventional p...

Страница 10: ...EDs are all off the unit can be turned on by momentarily pressing in and releasing the front panel Encoder Knob Upon powering up all the LEDs will briefly flash leaving the Status LEDs lit at all times On the LDR6 the LED corresponding to the currently selected input will also bit lit Remote The unit can also be turned on via the remote by momentarily pressing the red Power button on the remote Tu...

Страница 11: ...ut channel LED on the front panel is currently lit Once the desired input has been selected releasing the Encoder Switch will lock in the input selection un Mute the unit and the volume will ramp back up to the same level prior to being Muted LDR6 Only Remote The desired input can also be selected via the Remote by pressing any one of the six input select buttons CD DAC Phono TV DVD or Aux Selecti...

Страница 12: ...y reset no left or right bias by pressing the Reset key on the Remote Doing so will return the Balance settings to zero as evidenced by the Status LED briefly pulsing and then remaining lit 12 Volt Trigger Output When the unit is turned on 12 volts DC will be present on the Trigger Output jack on the lower right of the Rear Panel This trigger signal can be used to turn on other components equipped...

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