Choosing an iOS Guitar Interface

’99 TJ REAPER Mobile

across the country! A responsive developer like this is a very good sign indeed.

Erik Klerk’s GuitarJack Stage setup. Note the, apparently, Radial DI for the PA output. Sonoma Wire Works definitely recommends NOT putting phantom power into this thing, and anyway, you need to get the levels sensible as the outputs are line level, and unlike so many of the other devices, are claimed to be capable of desktop interface levels of output gain. Note also the expression pedal input, the REALLY long cable from the GuitarJackStage to the iPad, and what seems to be BIAS FX

StudioJack Mini

Pass thru charging!

Stereo 1/4″ output

Like the GuitarJack Stage, this unit can also function as an audio interface for the desktop and has ASIO drivers.

Claims (now verified!)

  • Maximum output level (into 32 Ohms): 1.09 Vrms (34 mW) [my calculations say 2.97 dBu]
  • Maximum output level (into 10 kOhms): 1.73 Vrms (+7.0 dBu)

“The Vrms specs on our site are accurate, but I did some fresh Vpp measurements so you can compare. I got out my Fluke 289 multimeter, a Telecaster, and the StudioJack Mini plugged into an iPhone 6, no external power. Using the the Peak voltage measurement feature on the Fluke, the output of a solid strum across the open strings with the Bridge pickup on the Tele is ~2.5Vpp (it’s got some pretty hot pickups:) Plugging the Tele into the StudioJack Mini and setting the input level to just before the LED turns red (about halfway on the input knob), GuitarTone app running on iPhone, but with all the amps and effects bypassed, so basically just a pass through, with a similar strum yields a similar ~2.5Vpp output. Running a Signal Generator app, with a 1kHz sine wave with full output level I measure ~3.6Vpp. Changing to a GuitarJack Stage gives similar results. So yes it is definitely possible, and our devices both do it without external power. Of course, add the external power, and you get the pass-through charging for your iPhone or iPad:) We run them for 10 hours a day, all week at NAMM. We had to have twice as many iPads as demo stations at shows before we added charging. It was our number one feature request for GuitarJack Model 2, and it tool a lot of work to get right. A lot of this is thanks to Joe Bryan”

THAT is the kind of tech support you’d expect from a company that wanted to stay alive in the desktop world, but is so sadly lacking in the iOS world. This is what you should DEMAND, without question, from the other iOS based companies. MEGA kudos to Sonoma Wire Works.

Hopefully I’ll be trying these sooner rather than later.

Update: Got one on order stay tuned!

Here’s the StudioJack Mini next to my iRig HD2 for a good size comparison.







If the products themselves live up to the excellent customer care standards SWW have already shown, I think these devices will be the top of the heap.

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