GuitarJack Model 2

High quality iOS interface

GuitarJack Model 2

GuitarJack Model 2: High Quality Interface for iOS

GuitarJack Model 2 has been discontinued. Please see the newer models: GuitarJack Stage and StudioJack Mini.

GuitarJack Model 2 is a critically acclaimed, studio quality iOS audio input and output interface. Connect a wide range of instruments, microphones, and other audio hardware to the iPhone, iPad and iPod touch via 1/4" instrument and 1/8" stereo mic/line inputs. GuitarJack's 1/8" stereo line/headphone output offers increased drive for headphones. GuitarJack Model 2 will help you achieve the best sound quality possible on iOS with superior components, controllable input level control with 60 dB of gain plus 12 dB pad for 72 dB of adjustment, configurable Lo-Z and Hi-Z modes and a 24-bit AD/DA converter*. GuitarJack Model 2 can record in stereo and simultaneously record vocals and an instrument when used with apps like FourTrack (iPhone) and StudioTrack (iPad) that support those features. GuitarJack Model 2 also works well with most third party audio apps like GarageBand.

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    Multiple Inputs

    1/4 inch instrument input with configurable Pad, Lo-Z and Hi-Z modes. 60 dB of continuous level control. 1/8 inch stereo output with increased drive for headphones. 1/8 inch stereo mic/line input with Pad, Normal and Boost modes. 60 dB of continuous level control. "Dual inputs (1/4" and 1/8") mean that you can record both your guitar and vocals to separate tracks, taking full advantage of this software." - Premier Guitar

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    Compatible Apps

    GuitarJack Model 2 is the perfect companion for GuitarTone ($2.99), Taylor EQ (available in FourTrack), FourTrack and StudioTrack. Enables $19.98 worth of GuitarTone amps and effects. Works with most 3rd party apps like GarageBand.

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    Sleek Design - "GuitarJack Model 2 is a handsome, well-built adapter for capturing ideas in instrumental and vocal form. Machined aluminum housing looks nice...alleviated fears about damaging in a gear bag."

"GuitarJack remains the top-of-the-line instrument-to-iPhone interface...impeccable sound with no discernible noise. Its solid aluminum body also has a 1/8-inch input for a microphone, so you can record on two tracks simultaneously..."
Rolling Stone Magazine

"Physically, it's a thing of beauty - and sturdy too...simultaneous recording of both guitar and a mic'ed signal...Worked like a charm and sounded fantastic with both electric guitar and line-level signals. Very quiet with plenty of headroom, and not a hint of RF hum."
Tape Op Magazine

"The industrial design of GuitarJack suggests a tiny Steinway grand piano crossed with a silver Ferrari...higher quality data transfer, less crosstalk, and better sounds as good as it looks...yes, you can record using both the guitar and microphone inputs simultaneously into FourTrack or StudioTrack. That's huge. GuitarJack is made right here in America, too.."
Premier Guitar Magazine

"The proof is in the sound. GuitarJack worked beautifully...the quality of the signal was evident...a clean, clear signal for your guitar."
The Loop

"This is the Rolls's a completely different kettle of fish from the other's just gorgeous. It sounds great. The converters on this are designed by someone who's famous for Universal Audio front end stuff, so it's got good heritage."


• GuitarJack Model 2 Box (89 KB .jpg) (1.7 MB .png)
• GuitarJack Model 2, FourTrack, iPhone 4 (240 KB .jpg) (Hi-Res 3.4 MB .tif)
• GuitarJack Model 2, StudioTrack, iPad (Low Res 80 KB .jpg) (Hi-Res 4.2 MB .tif)
• GuitarJack Model 2 Unit Top View (2 MB .jpg) (Hi-Res 1.2 MB .tif)
• GuitarJack Model 2 Right: 1/4" Input + 1/8" Stereo Line Out (36 KB .jpg) (372 KB .jpg) (1.6 MB .tif)
• GuitarJack Model 2 Left: 1/8" Stereo Mic/Line (35 KB .jpg) (1.1 MB .jpg) (1.6 MB .tif)

Hardware Details

What You Can Do with GuitarJack Model 2

  • Connect a guitar, bass, keyboard, microphone, 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 mono, stereo, or simultaneously record your voice and instrument on separate tracks using GuitarJack with apps like FourTrack and and StudioTrack.
  • Jam to the GuitarTone amps and effects app and the song tool in FourTrack and StudioTrack. More GuitarTone amps and effects enabled free while GuitarJack Model 2 is connected. Also works well with most third party audio apps like GarageBand.
  • Listen to music using the stereo output on GuitarJack Model 2, which has increased drive for headphones.

GuitarJack Features

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. 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 right channel and Instrument on the left channel
  • Included Software:


GuitarJack Model 2 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 32ohms): 1.00Vrms (63mW)
    • Maximum output level (into 10kohms): 1.00Vrms (+2.2dBu)
    • Frequency response (20Hz to 20kHz): +0.05/-0.40dB
    • Noise level (RMS, A-weighted): -97dB
    • Dynamic range (RMS, A-weighted): 96dB
    • THD (600mVrms into 10kohms): 0.0020% (-94dB)
    • THD (0dBV into 10kohms): 0.0036% (-89dB)
    • THD (0dBV into 32ohms): 0.026%
    • Stereo crosstalk (100Hz to 10kHz): -88dB

Line/Mic Inputs:

  • One 1/8" (3.5mm) stereo unbalanced input
  • Recording Rates: 44.1k and 48k depending on the app recording rate
  • 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): -96dB
    • Dynamic range (RMS, A-weighted): 96dB
    • THD (-3dBFS): 0.008% (-82dB)
    • Stereo crosstalk (1kHz): -96dB
    • EIN (equivalent input noise, 20kHz BW, 150 ohms): -115dBu
    • Latency - see FAQ

Instrument Input:

  • One 1/4" (6.5mm) mono unbalanced input
  • Recording Rates: 44.1k and 48k depending on the app recording rate
  • 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 (3rd and 4th generation) - Made for iPod certified
  • iPad 3*, iPhone 4S, iPhone 3GS
  • iPhone 5, iPod touch (5th gen.), iPad mini and iPad 4 using Apple's Lightning to 30-pin Adapter Cable (not included)

Dimensions (std/metric)

  • Length 2.55"/64.8 mm (including-30 pin connector)
  • Length 2.24"/56.8 mm (not including 30-pin connector)
  • Width 2.30"/58.5 mm
  • Height 0.61"/15.6 mm
  • 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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GuitarJack Model 2 has been replaced by the improved StudioJack Mini and GuitarJack Stage: GuitarJack Model 2 was $129.

"DrumCore is so handy and so very easy to use! It's very close to having a live drummer with you."

Learn more about DrumCore
Anthony Gonzalez of M83

"I'm obsessed with this recording app on my iPhone- the Sonoma Wire Works FourTrack. It's like you have a superpowerful studio in your pocket."

Learn more about FourTrack
Trey Anastasio of Phish

"Just tried out Sonoma Wire Works GuitarJack plus the new upgraded FourTrack app. Beautiful crystal clear sparkling audio in iOS!"

Learn more about GuitarJack
Jordan Rudess of Dream Theater

"RiffWorks is an incredible tool to get songs done stupid fast!"

Learn more about RiffWorks
Johnny "Juice" Rosado of Public Enemy