Bass Musician Mag
Sonic Farm 2di4 Pentode Direct Box
Review
JULY 2, 2015
BY JAKE WOLF
Sonic Farm 2di4 Pentode Direct Box Review…
If you spend a decent amount of time on stage or in the studio, you may know that a good
direct box (DI) is a bass players secret weapon. Even though some engineers prefer to mic a
bass cabinet, a high quality DI signal from the bass is immeasurably handy in both settings.
While there is no shortage of decent and relatively inexpensive passive DI boxes, many
players and engineers agree that a high quality active DI makes a world of di)erence in
making your bass sound as good as possible. Sonic Farm may not yet be a household name
among bass players, but the small Canadian company has garnered an impressive
reputation, crafting exquisite studio gear for recording and mastering engineers for years.
Their 2di4 tube direct box is not marketed or designed speci+cally for bass, but it’s
abundantly clear that the unit excels at generating killer bass tone. It’s also is well suited to
seamlessly integrate into your stage rig with varying degrees of transparency, and signal
routing ,exibility. I was lucky enough to take the 2di4 for a spin on a handful of gigs and a
couple sessions, and I’m happy to report that it’s a bumper crop on the Sonic Farm (okay,
just one farm pun, I couldn’t help it).
The 2Di4 is housed in a very rugged steel enclosure and is rock solid. Every component
clearly was chosen for its robustness, fidelity, or both. The shoebox-shaped chassis,
painted bright red with cream lettering is hard to miss, and definitely got some "what the
heck is that?" comments from other players and audience members. The volume knob,
jacks, switches, and buttons all feel more than adequately sturdy and smooth,
as do the 1/4" and XLR jacks.
XLR jacks.
While
the 2di4 is relatively simple in its operation, there is some nuance to the way the
controls function. There are a couple options for boosting the low and high EQ, in a subtle
and musical but never ‘over-the-top’ way. Some may +nd this a little underwhelming as a
tone-shaping tool, but in my opinion, these low/hi boost switches have a very e)ective,
albeit understated way of bringing out the natural qualities of your bass. The gradual, wide
slope of the low/hi boosts may be gentle, but there’s no mistaking their e)ect when
listening in the studio, or on the gig, in my experience anyways. 2 internal trimpots on the
front panel allow for +ne-tuning the amount of boost for each band (I favored the maximum
gain/fully clockwise position). If you require powerful EQ and want to use this unit straight
into a power amp, make sure you can get the EQ you need either on your instrument’s
active electronics, or some other unit in your chain with EQ (I recommend the Empress Para
EQ for very accurate and powerful equalization in a small pedal form factor).
The most engaging feature of the 2di4 has to do with the triode/pentode switch on the
front panel. Aside from the di)erence in output between the two settings (pentode is
clearly a hotter signal), the tonal variation between the two settings allow for some nice
variety. I found the triode setting to be fairly clean and neutral, with nice air and +delity. The
pentode setting on the other hand, is much more full-bodied with a stronger midrange
push. At higher gain settings, it doesn’t so much ‘break up’ as much as it ‘opens up’ with
respect to harmonic richness and fullness. The pentode setting provided just the right
amount of thickness to my sound, but retained plenty of articulation and de+nition. I’ve used
both settings quite a bit, and I don’t dislike anything about either one. They provide two
good tonal options that complement the usefulness of one another. An upright player who I
roped in for testing remarked that the Triode setting was great for his upright, due to its
clarity and articulation, whereas the Pentode setting added warmth, fullness, and midrange
complexity for electric bass.
There are a couple important things to know about the 2di4: 1.) You need to mute the unit
before you switch tube settings (T/P) or else you get a loud “pop” when the button is
depressed. It’s not a huge deal, but it is important to remember, in order to avoid this loud
popping sound through your speakers or front of house. 2.) The Low and Hi boost switches
are overridden by the gain button, which adds 9dB or 5dB of gain (in Pentode and Triode
mode, respectively) to the front end of the circuit. So if you have the unit set to add low and
high EQ, and you hit the “Gain” button, the overall volume increases and the EQ controls are
bypassed.
The result is less overall high and low frequency extension and tonal "width", and more
midrange focus, relatively speaking.
As I mentioned in the intro, there are a few ways to integrate this unit into your stage rig.
The 2di4 provides plenty of gain to use straight into a power amp, or in my case, the effects
return/power amp input on my 900w micro head. For the most transparent operation on
stage, I found the 1/4” "Amp" jack on the front panel to sound almost identical to
plugging straight in to my amp, although the effect of the buffering in this output gives just
a touch of sonic refinement to the dry signal. This output is ideal for those don't want to
"mess with success" by altering what goes into the front end of their amp. However, the
real magic lies within the dual XLR outputs on the rear of the unit. There are discrete "D.I."
and "Line Out" XLR jacks, which both harness the lovely tube-ocity of the circuit, with
the "Line Out" signal being noticeably hotter (Sonic Farm adds that the DI output was
made with a console mic input in mind and has a 12dB step-down transformer to bring
the level down from the line level). I found myself using one XLR line for my amp, and
the other one to send to front of house/recording console.
This let me hear how the 2di4 was reacting through my stage rig. Note: Using the 2di4 in
this way requires a special cable that has a female XLR connector on one end, and an
unbalanced 1/4" on the other. (The 2di4 users manual helps explain exactly what type
of cable is required for the various output configurations, and Sonic Farm responded
that they are more than glad to steer customers in the right direction, as well as build
customers the cables required for each individual's needs.)Comparing the 2di4 to
plugging straight in to my Puma 900, the Sonic farm adds a level of richness, detail and
articulation that reminds me of how a bass sounds after its been tracked and mastered:
refined, balanced, full and taut, you get the picture…Recording direct into Protools HD,
I was floored by how large and in charge the 2di4 sounded, especially in pentode
mode. Without a trace of brashness or harshness, it was effortlessly present, warm and
articulate. The engineer I worked with was quick to say that this was the best my bass
has ever tracked (and this is in comparison to vintage API, Neve, and Universal Audio
channels, not to mention some major bass preamp/DI contenders that I've hauled
over there in the last few years).
So what's not to like? Well, you may say: "why would I buy a DI for this kind of money
when my passive DI box works just fine?" And I would reply: "For lots of players, a passive
DI is totally sufficient". Not every player/band/setting requires the level of finesse that
the 2di4 delivers. Not every bass player needs a USA fender bass, some guys are just as
happy with a Squier or similar budget-level instrument. It's not for me to say who
needs what. What I will say is: if you've spent time, energy and money on crafting your
ideal bass sound, there are few pieces of gear that improve and enhance the natural
sound of your bass as well as the 2di4. Nothing I've heard offers the same level of
balance and articulate warmth, not to mention the flexibility and build quality.
The 2di4 is priced at $850 CAD (approx. $690), which is by no means cheap, but for
those who already have spent bundles of cash on a great sounding custom bass
(or three), the Sonic Farm is one of the best methods of preserving and communicating
the exquisite sound of your bass in the studio and on stage.
And if you consider yourself a tone-o-phile (like I do), you should know that the
2di4 is REALLY all that, and highly worthy of your consideration.
Check out Sonic Farm's website for more info www.sonicfarm.com
About Jake Wolf
Jake graduated from the Evergreen State College in Olympia WA,
with a degree in music composition, recording, and
performance. Jake resides in Asheville, NC where he gigs and
records as a freelance sideman around the SouthEast, and also as a
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