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LDR1 & LDR6 Operating Manual – Rev 1

Tortuga Audio

Operating Manual

LDR1 & LDR6 Passive Preamplifier

January 2013

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Summary of Contents for LDR1

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

Page 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 ...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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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