Acoustic & Electronic Instruments, Musicians, News, Tutorials, Videos & Interesting Finds
Acoustic & Electronic Instruments, Musicians, News, Tutorials, Videos & Interesting Finds

GuitarJack 2: audio recording on-the-go with iPad, iPhone, iPod touch

Sonoma Wire Works has just announced an update to its GuitarJack interface. Named the GuitarJack 2, this hardware will let you record far more than just guitars onto your Apple mobile device.

Key features include a 1/4-inch input with configurable modes, a 1/8-inch stereo output with increased drive for headphones, and a 1/8-inch stereo input.

Two inputs mean it’s possible, with the right apps, to record two sound sources at once.

What You Can Do with GuitarJack

  • Connect a wide range of instruments, microphones, and other audio hardware to the iPhone, iPad and iPod touch via 1/4 inch instrument and 1/8 inch stereo mic/line inputs.
  • Record in stereo, or simultaneously record your voice and instrument on separate tracks using GuitarJack with Apps like FourTrack and StudioTrack.
  • Jam to the GuitarTone amps and effects App and the song tool (coming soon) in FourTrack and StudioTrack. These Apps are optimized to sound best with GuitarJack. More GuitarTone amps and effects enabled free while GuitarJack is connected. Also works well with most third party audio apps.
  • Enhance the sound of your guitar with Taylor EQ, optimized for use with Taylor guitars and GuitarJack.
    Listen to music using the stereo output on GuitarJack, engineered to sound better than the line out on your iOS device.

Hardware Features

  • 1/4 inch (6.5 mm) instrument input – nickel-plated solid brass Switchcraft (10,000 MTBF) jack
  • 1/8 inch (3.5 mm) stereo mic/line input – (no phantom power is provided)
  • 1/8 inch (3.5 mm) stereo headphone/line output with increased drive for headphones
  • Dock connector designed for use without removing most cases
  • Device powered for ultimate portability – requires no batteries or power adapter
  • GuitarJack Model 2 includes a 24-bit AD/DA Converter, however only 16-bit audio playback and recording is currently possible until a firmware update becomes available. More about 24-bit
  • Sleek and rugged aluminum shell

Software Features

(Control Panel in GuitarTone, FourTrack, StudioTrack & TaylorEQ)

  • Level Control: 60 dB of continuous level control
  • Input Modes:
    – Instrument (1/4 inch) – mono – Pad, Lo-Z or Hi-Z mode
    – Mic/Line (1/8 inch) – mono, dual-mono or stereo – Pad, Normal or Boost mode
    – Both inputs – Mic/Line input on the left channel and Instrument on the right channel
  • Included Software:
    – GuitarTone and TaylorEQ are available free
    GuitarJack enables additional amps and effects in GuitarTone, FourTrack and StudioTrack while connected ($19.98 value)

Tech Specs

Line/Headphone Output

  • One 1/8″ (3.5mm) stereo unbalanced output
  • Continuously variable gain
  • Responds to iPod volume up/down buttons
  • Specifications:
    • Maximum output level (into 16ohms): 1.23Vrms (95mW)
    • Maximum output level (into 10kohms): 1.30Vrms (+4.5dBu)
    • Frequency response (20Hz to 20kHz): +0.02/-0.20dB
    • Noise level (RMS, A-weighted): -95dB
    • Dynamic range (RMS, A-weighted): 95dB
    • THD (600mVrms into 10kohms): 0.0025% (-92dB)
    • THD (0dBV into 10kohms): 0.0036% (-89dB)
    • THD (0dBV into 32ohms): 0.026%
    • Stereo crosstalk (100Hz to 10kHz): -70dB

Line/Mic Inputs:

  • One 1/8″ (3.5mm) stereo unbalanced input
  • Selectable pad
  • Continuously variable gain
  • Specifications:
    • Minimum input impedance: 4.7kohm
    • Maximum input level (pad on, line-input): 6.5Vrms (+18dBu)
    • Minimum input level (boost on, full scale mic): 7.5mVrms (-40dBu)
    • Frequency response (40Hz to 20kHz): +0.06/-0.65dB
    • Noise level (RMS, A-weighted): -88dB
    • Dynamic range (RMS, A-weighted): 88dB
    • THD (-3dBFS): 0.05% (-66dB)
    • Stereo crosstalk (1kHz): -86dB

Instrument Input:

  • One 1/4″ (6.5mm) mono unbalanced input
  • Selectable pad
  • Selectable impedance
  • Continuously variable gain
  • Specifications:
    • Input impedance: 470kohm
    • Maximum instrument input level (Lo-Z Pad): 6.5Vrms (+18dBu)
    • Maximum instrument input level (Hi-Z, 1% THD): 700mVrms
    • Maximum instrument input level (Hi-Z, 10% THD): 1.5Vrms
    • Maximum instrument input level (Hi-Z, 20% THD): 2.5Vrms

Device connection

  • Apple 30-pin dock connector
  • iPhone 4 – Made for iPhone certified
  • iPad 2 and iPad – Made for iPad certified
  • iPod touch (2nd, 3rd, and 4th generation) – Made for iPod certified

Dimensions (std/metric)

  • Length 2.46″/62.5mm (including 30 pin connector)
  • Width 2.08″/53mm
  • Height 0.62″/15.8mm
  • Weight 2.25oz/65g


  • Case
    • 6061 Aluminum
    • Black nickel plated with stainless steel side panels
    • Laser etched logo
  • 1/4″ connector
    • Switchcraft
    • Nickel plated Brass
    • 10,000 insertion MTBF (with switchcraft plug)
  • Electronics
    • RoHS certified components

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