Blue Spark SL Test with Acoustic Guitars Part 2 – STEREO

Lately, I’ve been experimenting a lot with the Spark SL Large Diaphragm Condenser Microphone.
Overall, I am extremely pleased with its performance, both with acoustic guitars and vocals.
At 195€ I think it is one of the best bang for the bug pieces of gear I ever purchased.

Fact is, i bought two in order to record some acoustic track with a friend of mine, to understand if we could make a record on our own by tracking everything with a couple of mics, some synths and some virtual instruments.

Following the quick test with Martin and Bourgeois guitars with a single mic (mono), here are some tests with a stereo (two microphones) setup.

Why stereo? Because stereo tracking is the most common (and most regarded) way of recording acoustic guitar.

The test

The tracks were recorded using a super traditional, tried and true approach:

An equilateral triangle.

The player sits at a vertex of the triangle, while each mics is positioned at equivalent distance from the player at each vertex of the said triangle.

Much like this:

acoustic guitar recording mic placement

The microphone are tilted 45-50 degrees: one points towards the fretboard of the instrument, the other one points toward the sound hole.

Mic stands were positioned a 1.5-2 meters away from the player.

Guitars we used

  • Bourgeois OMC Vintage Adirondack
    A beautiful, boutique Cutaway OM with a solid Adirondack Spruce top, solid East Indian Rosewood back and sides. Strung with Elixir strings .012 – .053
  • Martin Custom 000-18 Amberburst
    000 size, short scale Martin with beautiful amber burst finish. Solid Sitka spruce top, solid mahogany back and sides. Strung with Martin SP .012 – .053

The Test

We recorded in an untreated room,

All the clips were recorded WITHOUT high pass filter engaged.


NO compression, NO EQ, NO mastering. Just straight sound out of the microphone with a slight panning in the track where the two guitars are mixed together.

On to the results!

Bourgeois OMC


Martin 000-18 Amberburst


Bourgeois & Martin together.

All the clips have been recorded straight to an Apogee Duet Firewire interface, 24 bit /48hkz.

I exported the files in 24 bit WAV format and converted them to 320kbs MP3 using LAME codec.

Do you like the sounds? Do you feel like they are “realistic” given the recording conditions?
Would you like to hear more?

Drop me a line in the comments below!

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