The GuitarJack Model 2 from Sonoma Wire Works is an audio interface for iOS devices that allows for connecting a wide range of instruments, microphones, and other audio hardware to the iPhone, iPad and iPod touch. It features a guitar jack and stereo microphone/line input, and a line and headphone output. And when using the company's own software two inputs, such as a voice and instrument, can be recorded simultaneously.
The instrument input has configurable Pad, Lo-Z and Hi-Z modes, and all inputs have 60dB of continuous level control. The stereo microphone/line input features Pad, Normal and Boost modes. The stereo mini headphone output has increased drive for louder playback. The interface works well with most third party audio apps like Apple's GarageBand, is device powered, and housed in a sleek and rugged metal shell.
| Converters | 24-bit (currently only 16-bit audio playback and recording is possible until a firmware update becomes available) |
| Analog Input |
1 x 1/4" TS phone Instrument 1 x 1/8" (3.5mm) TRS stereo mini Line/Microphone |
| Input Impedance |
Line/Mic: 4.7kΩ Instrument: 470kΩ |
| Maximum Input Level |
Line/Mic Pad on, line-input: 6.5Vrms (+18dBu) Boost on, full scale mic: 7.5mVrms (-40dBu) Instrument Lo-Z Pad: 6.5Vrms (+18dBu) Hi-Z, 1% THD: 700mVrms Hi-Z, 10% THD: 1.5Vrms Hi-Z, 20% THD: 2.5Vrms |
| Analog Output | 1 x 1/8" (3.5mm) TRS stereo mini Line/Headphone |
| Maximum Output Level |
1.00Vrms (63mW) into 32Ω 1.00Vrms (+2.2dBu) into 10kΩ |
| Other Connectors | 1 x Apple 30-pin dock connector |
| Gain | 60dB, continuously variable |
| Dynamic Range | 96dB, RMS A-weighted |
| Noise |
EIN: -115dBu, 20kHz bandwidth, 150Ω Input: -96dB, RMS A-weighted Output: -97dB, RMS A-weighted |
| THD |
Input 0.008% (-82dB), -3dBFS Output 0.0020% (-94dB) 600mVrms into 10kΩ 0.0036% (-89dB) 0dBV into 1010kΩ 0.026%, 0dBV into 32Ω |
| Frequency Response |
Input 40Hz to 20kHz, +0.06/-0.65dB Output 20Hz to 20kHz, +0.05/-0.4dB |
| Crosstalk |
Input -96dB, 1kHz Output -88dB, 100Hz to 10kHz |
| Case |
6061 Aluminum Black nickel plated with stainless steel side panels Laser etched logo |
| Power Requirements | Device powered |
| System Requirements | Compatible with iPhone 4, iPad 2, iPad, iPod touch (2nd, 3rd and 4th generation) |
| Dimensions (WxDxH) | 2.3 x 2.6 x 0.6" (59 x 65 x 16mm) |
| Weight | 2.3 oz (65g) |
| Specialties |
Selectable pad on line/microphone and instrument inputs Connectors capable of 10,000 insertion MTBF (with switchcraft plug) |