Peterson AutoStrobe R490 - Rack Mount

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Peterson AutoStrobe R490 Rackmount

The AutoStrobe 490 brings accuracy that only the speed of light could measure. ONLY Peterson! The R490 Rackmount comes with Rack Mounts and Jacks on Front and Back


  • Automatic Note Selection
  • Automatic Image Clarity And Contrast Control - Internal Compensation For Optimal Viewing Over A Wide Range Of Source Pitch And Volume.
  • Enhanced Clarity For Upper And Lower Register Notes - +2/-1 Display Feature Shifts The Strobe Patterns Into More Visible Middle Ranges - Bass Note Patterns Can Be Displayed Two Octaves Higher And Treble Note Patterns Can Be Displayed One Octave Lower In Strobe Display.
  • External Input And Through Output With Mute - For In-Line, Silent Tuning During Performances.

The Peterson AutoStrobe 490 is agreed by music students, technicians, and professionals to be the standard by which all tuners are measured. Only Peterson could bring you the kind of real-time intonation critical enough for ear training use. Enjoy hands-free note selection for fast, accurate tuning of instruments. Other companies may boast of their strobe tuner capabilities, but buyer beware!

The AutoStrobe 490 is a truly stroboscopic mechanical tuner capable of fundamental and overtone display.

Key features include mutable throughputs for in-line (yet silent) tuning during performances, automatic image clarity and contrast control which internally compensate for optimal viewing over a wide range of source pitch and volume, improved clarity for upper and lower register notes (our +2/-1 display feature shifts the strobe patterns into more visible middle ranges so that bass note patterns can be displayed two octaves higher and treble note patterns can be displayed one octave lower in strobe display), and easy transposition (strobe patterns appear at the correct note for Bb, F, and Eb instruments).


Real-time display of intonation and harmonic content to improve performance and listening skills while playing.


Instantaneous visual indication of how much the pitch of your instrument differs from the precise target pitch you are trying to tune.


Tune in loud environments quickly and easily. Perfect for band rooms, loud sound stages, and manufacturing environments.


Trusted by industry pros for over 65 years to deliver dependable performance and accurate tuning to some of the largest stage acts in musical history.


  • Power Supply: Built-In (IEC) 
  • Stretch Tuning Tables: No
  • Note Range: C1 to B8
  • Note Selection: Automatic Or Manual
  • Peterson Connect Compatible: No
  • Form Factor: Rackmount, includes rackmount brackets
  • Accuracy: 0.1 Cents
  • Display Type: Single Analog Strobe Disc
  • Display Resolution: Infinite (Analog)
  • Construction: Metal Casing
  • Product Dimensions LxWxH: 13.4" x 6.375" x 3.5"
  • Product Weight: 7lbs. (3.18kg)
  • USB Port: No
  • Power: AC 100V to 240V
  • Built-In Microphone: Yes
  • Built-In Speaker: No
  • Metronome: No
  • Inputs: 1/4" Jack 
  • Outputs: 1/4" Thru
  • Mute-able Output: Footswitch Controlled
  • Tone Generator: No
  • Concert A Range: 350Hz to 550Hz
  • Global Cent Offset Range: +/- 50 Cents
  • Transposition Range: Keys of C, Bb, F, Eb
  • Frequency Response Range: 32.70Hz to 7902.13Hz
  • Warranty: 1 Year 
  • User Presets: 64 User Presets
  • Historic Temperaments: Yes