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Magazine Reviews:

Juggernaut Review: Tape Op Magazine
Juggernaut Review: Mix Magazine


"If I had to choose just one preamp, it’d be no contest—Juggernaut." -- Andy Hong, Tape Op Magazine


APA Juggernaut vs. Avedis Audio MA5 Audio Samples:

Signal Chain: Pearlman TM-2 > FMR RNC Nice Mode > Lynx Two C.
Juggernaut settings: both with +THD engaged, and the one position level left of 4K as the mic load.. one is with iron input and the other with nicket input, both iron output.

Clip 1 - Avedis MA5
Clip 2 - APA Juggernaut Nickel +THD
Clip 3 - APA Juggernaut Iron +THD

Files courtesy of user Zvenx.

Juggernaut Reviews:

Juggeraut User Review w/Bass DI Audio Samples:

"It isn’t that often that you find a mic-pre to really get excited about anymore. There have been so many crowding the market in the last few years that my response is usually less than enthusiastic. I’m probably your typical project studio owner. I’ve got my rack of pres that I’ve accumulated over the years and in my mind don’t really need to be looking for anything new. If it ain’t broke, don’t fix it right?

A few months ago I received an e-mail from Nathan Eldred at Atlas Pro Audio, asking me if I would be interested in testing his new pre-amp offering, The Juggernaut. Being a Gearslut at heart, I couldn’t help but say yes, but in the back of my mind I’m thinking, “There is no way I’m spending any more money on another mic pre.”

I had almost forgotten about being in the test group for the Juggernaut when UPS dropped the package off at my door. I was in the middle of a session but couldn’t help but open the box and peak inside. Build quality on this unit is great, the de-tented controls feel extremely solid, and aid in quick recall of settings, also the button setup is pretty slick. The LED lit switches enable you to see exactly what’s engaged from across the room. The clip light worked in a similar manner.

The first test of the pre-amp was on a drum session. I had my old reliables on snare drum. My go-to is the Vintech X73i and if I want something a bit different, I just route the snare over to the Great River MP-2NV. These 2 pretty much serve me well in every circumstance. I had actually already tracked 5 songs when I brought the Juggernaut into the mix. Without mentioning anything to anyone else in the room, I patched over to it and started working. It immediately offered such an improvement, that the artist and drummer commented on the sound after the first pass. So much for a subtle change. I would describe it as a bit faster compared to the X73i, but also a little fatter, and less blocky. I found the best success with the Iron transformer in this situation, and the THD switch engaged. The clip light flashing here and there didn’t yield any audible distortion, just a more saturated (and better!) sound. Don’t be afraid to have it blinking now and then.

The second area I put this thing through the test on was bass. I wouldn’t describe this thing as even slightly clean with the iron transformer engaged. I was able to pull more growl out of it than even the Great River. I’ll let you judge for yourself though. Below are sound clips of various pre-amps.

The setup was as follows: Fender American P-Bass, Pre-Amp, Atomic Squeeze Box, Apogee AD-16X. I didn’t change any settings on the squeeze box from take to take, and adjusted the gain on the pre-amp to where I was seeing 4-5 dB of gain reduction.

Great River MP2-NV

Mercury Audio V72

APA Juggernaut (Iron Transformer)

On the overall the final outcome of this demo was extremely positive, The nickel transformer didn’t really do to much for me personally but I really typically prefer a more colored sound and it does give the pre a lighter, more gentle side.

This isn’t really a pre-amp I would recommend for a clean scenario, but when it comes to color, between the variable impedence, THD switch, and 2 transformers, this thing offers a freakin’ rainbow. My Vintech will be on the classifieds soon if anyone is interested.

Cheers,
Jon King
Producer/Engineer
Smoking Gun Recording Inc.
Nashville, TN




Juggeraut User Review w/Vocal & Guitar Audio Samples:

I work writing music for television (midi rig with live sweetening) so I’m not really set up for multitracking…I’m recording 1 or possibly 2 instruments at a time in my treated room. If I require something more extensive I’ll book studio time. I don’t need a ton of gear just a few well chosen pieces.

I’d been using DAV pres, but I thought the Juggernaut might suit me because I guessed I could get a bunch of different sounds out of a single piece of gear (man…I was right on that score). I bought a pair with the extra nickel output transformers.

They arrived from Atlas incredibly well packed…double boxed…mucho packing filler. I installed the nickel output transformer in one, left the iron in the other and put up some mics.

A few observations…

You can get many, many tones out of these units. To generalize in an overly simplistic way…


1) The iron (in and/or out) gives more mid range ‘bite’, the nickel (in and/or out) gives a smoother broader tone.
2) The input transformer impacts the sound more significantly than the output transformer.
3) The (incredibly useful) impedance feature allows you to dial in a ‘sweet spot’ to suit a particular mic.
4) Every mic will react differently (sometimes dramatically) depending on the combination of input transformer>impedance>output transformer.

I took notes with my modest mic collection to catalog some useful settings, and determine the response to the impedance and transformer settings. Once you get a handle on the possibilities you can basically shape your sound to taste. I also have my Juggernauts patched out to an ATTY so I can overdrive the pre (even more than the THD button provides) if desired.

I’m using the Juggernauts to juice up the drum loops on the project I’m presently on, but cannot post those…so….there are two sets of clips below which might be of some use. They are 44.1/16 bit, and mic placement was identical for matching takes. The gain is closely matched, but please feel free to adjust if required.

The first two clips are a VO reading of a sentence from the Juggernaut manual. The chain is Stedman pop filter>AKG 414B-ULS>Juggernaut>Fireface>Nuendo. One clip is iron/iron; the second is nickel/nickel. Impedance was at the 12 o’clock position.

The other two clips (see the following post) are a very brief picked acoustic guitar segment. I am very obviously not a guitar player, but I think the clips illustrate the wonderful ability of the Juggernaut to sculpt the tone. The chain is Schoeps MK41pair>Juggernauts>Fireface>Nuendo. One clip is iron/iron with THD On; the second is nickel/nickel. Impedance was at the 9:30-10 o’clock position.

A final note…the attention to detail, build quality and look of these preamps is outstanding…kudos to Tim and Nathan.

[Vocal/Spoken]
Jugger_414B-ULS_Iron.wav
Jugger_414B-ULS_Ni.wav


[Guitar]
Jugger_Ac_Gui_Iron_THD.wav
Jugger_Ac_Gui_Ni.wav
Cheers,
wellyouneednt" -- User "wellyouneednt"
Mini-Review:
"Alright, so here are some further impressions after having owned the Juggernaut for a while longer now... I have been blown away.

The Jugg absolutely needs more tweaking than any other pre I own - but the payoff is worth it. On the wrong impedance or transformer setting or combination thereof, the sound seems only 90% there. Totally workable but not something that's going to win out over the other usual suspects. It's when you find that magic combination of settings that the Jugg really comes alive. Tonight I was tracking vocals with my Blue Kiwi. I tried the mic through the Lachapell 583, API 512c and the Pacifica and wasn't thrilled with any of them on this particular vocal. Finally I ran it through the Jugg with impedance at 4k, THD on and nickel transformers both in and out - PERFECT. Beautiful balanced 3D sound. Pre-mixed like a record. Maybe the Kiwi likes the higher impedance load? Who knows, I'm not a techie, but I do know that this chain sounded beautiful. Switched to Iron input transformer and the tone changed slightly but was equally impressive. This versatility is truly a lifesaver when the other static designs just won't cut it for whatever reason.

The Jugg is able to achieve a more focused and tighter sound than any of the other aforementioned pres when dialed in just right. It's a great tone. Not "dirty" or "heavily colored" but it has a great musical dose of metal in there. Tim Farrant is one hell of a designer. My Avedis MA5, API 512c, and the Jugg now have to battle it out to see who gets a twin brother for the final spot in my lunchbox... hmm... decisions, decisions, decisions..."

--posted at Gearslutz.com by Juggernaut user 'PheelTheMusic'


I ♥ Juggernaut Twin:

"Instant love.. The amount of control is amazing. The literature that APA provides (on their site) is just a spot on representation of what you get. kudos!! from Clean & Pristine to Oozing w mojo..the dial-able Punchiness!....All shall feel the violent percussiveness of my guitar.. muhahah my fav is the control over the "edge" of my tone. I can blur/sharpen the focus on the instrument. I'm really big on reamping, so this is just too exciting for me. I own an ADK MP-1 also... and that piece is all about customization...but where the MP-1 is a "Mitten", the Juggernaut is a GLOVE control control &#^$%@!!! One gripe so far is the name Juggernaut... I prefer "Bad MamaJamma"or "Who Let the Dogs Out"

-- Flune.

NEW!! User Video Clips:

Check out the YouTube video clip of Trey J. playing the guitar solo from "U Got it Bad" by Usher.



Session Notes: Recorded through the DI of the Juggernaut 500 using Digidesign Eleven in Pro Tools.

Check out the YouTube video clip of Eric Lumiere playing acoustic version of "Need You Now" by Lady Antebellum.



Session Notes: Acoustic guitar recorded through the DI of the Juggernaut 500 using internal pickup, Vocals recorded with SM58 to Juggernaut 500.

Check out the YouTube video clip of Spitz B, song titled "Do Re Mi".






Juggernaut Testimonials:

"Folks 'round here know I do mostly acoustic gigs, so I lean towards the clean side of preamp land. For a "color" preamp to earn a place in my remote rack, it has to be something pretty special. Well, the Juggernaut Twin has earned its rack space.

Last week I used it on close mics for a Steinway D. Normally I mic this instrument from twenty feet away and so I did my usual thing with a DPA 4003 pair, APE balls, and a Millennia HV-3 preamp. Beautiful -- but unusable for one piece that was performed with pre-recorded backing tracks played over a loud PA. So close mics were called for, but I did NOT want them to sound too close -- I decided I wanted a softer attack like you'd hear out in the hall. I put up a pair of 4006-TL's with trapazoidal grids inside the Steinway and plugged them into the Juggernaut Twin to get a little help from its transformers. With all the options on this thing, you'd think it might take a long time to dial in a sound, but it didn't. I started with Nickel/Nickel, and spun loading knob, quickly realizing that the 10k setting sounded most natural. Tried the Iron output tranformer... nope, not my cup of tea in this case. Tried the Iron input transformer... nice softening of the bottom octave, just as I was hoping. Mission accomplished!

As it turned out, the artist wanted more bottom impact than I thought he would, but with one button push I was back to the Nickel input transformer and on with the session.

Anyhow, I just wanted to give a thumbs up to Nathan and Tim for making such a versatile box."

-David L. Rick, Seventh String Recording



"The variable impedance is a godsend! I haven't had the chance to directly compare it to API, SSL, or UA, but I can confidently say that I am easily more impressed with the Juggernauts than API or UA. I use an SE Electronics Z5600 (not the greatest, I know) for vocals, and I found the higher impedance sounded boxy, but when I starved the input at 300 ohms it took on a really nice quality (with the iron input transformer, nickel output transformer, and +THD button engaged - I found this to be a very neve-ish setting, someone correct me if I'm wrong). This setting also works really well for that pinched distortion sound on guitars (good for pop punk or modern rock). When I cranked up the impedance, I noticed that everything gets a lot fatter, huge actually. I do mostly indie, pop, and electro, so I'm loving the tones I'm getting. They are beautiful preamps, I'm really tempted to get two more ! You should definitely pick at least one up if you have an empty slot... or get a new lunchbox." - Conor O.



"Hi Nathan,
Just an update - I'm really enjoying the Juggernauts. The nickel input with 4k impedance using DPA 4011s sounded incredibly big and detailed on a frame drum - You can hear so far into the drum it's like there's an entire chamber in there. Iron +THD and low impedance with Neumann U67s on Clarinet / Sax solo improvs was also very nice as I could lean towards thickness and a darker sound which I preferred on this project. Obviously you know this already but it's nice to be experiencing it myself.

Best Wishes,
Silas" -- Silas Brown, Legacy Sound, www.legacysound.net



"Nathan,
Just wanted to drop a line and tell you how much drool I am having to clean off of the Juggernaut twin. What an incredible freakin' preamp! I want a rack of these things. Some of the best workmanship I've seen in quite some time. Thanks again for all of your invaluable help.

Best,
Keith S.
p.s. Oh, I've found 2 words to describe this preamp when asked what it sounds like... ELEPHANT BALLS!!!"



"Hi nathan, I recently purchased a juggernaut pre...I own some nice pieces in my studio..eg bae 1073 API 512 ..m5..ua2610.chandlers etc...I constantly have people comn round doing comparisons with my 1073..they always come up trumps..however ur juggernaut to my amazement is like splitting hairs with the API and 1073..u guys have hit the mark..well done..."

Michael G.



"Hi Nathan - I wanted to re-iterate how satisfied I have been with the performance of the unit - I just got out of recording school and have been working as a lackey for John Mellencamp's engineer for a year - recently we recorded some voiceovers on a project with some SM7's - we were using some Jensen/Hardy type pres but didn't have enough channels, so I brought my Jugg in and set it to nickel/nickel with a pretty high impedance and actually ended up liking it better. Thanks again for a great product!"

-- Neal



"Finally got to test our new Juggernaut Twin today. Basically we were setting up our new tiny control room, only had a few minutes at the end to run some basic tests. Used a pair of AT4041s in XY on a Seagull Cedar 12-string acoustic. OMG the nickel/nickel transformer setting was perfect! Played with the impedance control and it is nice to color the sound without adding an EQ. The iron/iron transformer setup was deep and thick. Can't wait to do some serious recording and vocals with it soon. Excellent product Nathan and Tim!!!!!!"

Carl Fuehrer
Pulsar Audio Lab
http://www.pulsaraudiolab.com



"Hi Nathan,

Well I gotta say after a day of tracking E guitars with the Juggernaut Twin I can't imagine tracking E Guitars without it. It was a very stripped down session in that there was only one ribbon mic (Fathead w/ Lundahl mod) a Fender Twin, PRS Guitar and a Strat. BTW, the Fathead sounds GREAT with the Juggernaut Twin. But the number of colors that we were able to get was still remarkable. Probably one of the best Strat sounds I ever got. THe guitar player I was working with was very impressed as was I obviously. Looking forward to getting another."

Robert George www.robertgeorge.net



"Dear Atlas Pro Audio,

Thank you for taking the time, effort, and energy to bring the APA Juggernaut Twin to market. It has become the standard by which I measure all other preamps in terms of clean gain, musical coloration, and flexibility when working with a variety of sources. After using this premamp for the better part of a month, it has become my go to preamp 100% of the time. It makes my ears happy! Having spent the last 4 weeks tweaking variable impedance settings, leveraging ability to color direct instrument inputs with nickel or iron transformers, as well as the finesse with which it handles all sources (percussion, guitars, piano, vocals, etc.), I believe that all of my future preamp purchases will be APA Juggernaut Twins. It also saves me hours mixing -- I can easily establish a sonic space for each track I put down through the preamp by simply switching a transformer, boosting the low end, or adjusting the impedance. Thanks for the outstanding A+++ product!

Isaac Petruccelli
Methuen, MA USA


"Hi Nathan!

I had a chance to use the Juggernaut for the first time in a recording session the other day for a rock vocalist. The engineer had been using an exceptional U47, through an exceptional 1073, compressed by a Manley Slam.

The vocals I heard when I entered the studio sounded great!

I had brought my Juggernaut in that day, with the Nickel transformer output, to see how it would sound for that particular session.

We simply swapped the 1073 with the Juggernaut and had the vocalist sing a few takes.

What happened next was amazing.

All of us were not sure exactly what we were listening to. It had to have been the most 3 Dimensional vocal that any of us had ever heard. Simply astounding. I have never heard anything like it. Congratulations on a FINE product!

Since then, it's been very difficult to be satisfied without that particular vocal chain. "

Jeff M. - Japan

"i strongly recommend the [APA] Juggernaut. my favorite pre I've ever used on electric guitar. I've used P1's, Eisen "Neveish's", OSA L3's(which are all AMAZING on electric guitar btw, can't go wrong with any of these) and more...but the [Juggernaut] was the winner for me, barely edging out my Eisen. this was one comparison though, and it was for a very heavy sound...so take that for what it's worth.

if huge low mids with attitude is what you're looking for, I'd say the Juggernaut with the iron transformer engaged is a great option. you can control the darkness of the pre to some extent as well as well with the impedance control. amazingly versatile preamp." -- Trey J.



"Well, I can finally report that Juggernaut #15 is working properly and sounding beautifully. Finally got a chance to plug her in and give her a workout yesterday. Tracked trombone, alto sax, and vocals through it for a ska/metal band I have been recording lately. The variable impedence was definitely a godsend. There were a few times where I was very close to the sound I was looking for, and with a twist of the mic load knob, I was able to dial the sound right in. With that added level of control thrown in, I don't think these tracks will need much EQing come mixdown.

I ended up using the iron transformer for the horns, and nickel for vocals. Haven't gotten around to trying the other output transformer yet. But everything I have done so far sounds great. Nathan and Tim, you guys have definitely came up with an amazing product. It truly feels like a Mercedes of a mic pre. Everything is very well thought out. I love the lag in the phantom power switch. Knowing that I won't destroy my ribbon mics if I accidentally tap the +48 button while fiddling with buttons or knobs definitely gives me an extra sense of security.

...I will have to pick up either another 1 or 3 Juggernauts. So that I have at least one if not a pair of pres running with each output transformer.

...I just wish I had a fleet of 12 Juggernauts available when I did all the initial tracking. Everything sounds decent for what equipment I was using, but I can only imagine how an entire band tracked through these preamps would sound.

I know that it's good to have many different pres to give different flavors and tones when tracking. But if you consider all the tonal variations the Juggernaut is capable of, I think that just having 12-16 of these wonderful pres would be versatile enough to maybe only need something with tubes if that is really needed. I mean c'mon, by changing input and output transformers and using the THD pad, you are capable of 8 different sounds. And you've still got the variable impedence to add more tonal versatility.

I think Nate and Tim deserve a standing ovation for this pre. At least for me, it's everything that I could ask for and hope for in a preamp. A job very well done."
-- TocaLaGuitara


APA Juggernaut 500 and Revolver Rack Product F.A.Q:




Question: What are the differences between the transformers - how would you describe them?
Answer: We have two input transformers (iron and nickel) and two output transformers (iron and nickel - nickel is optional, iron output is standard) for the Juggernaut Preamp. The Iron is darker sounding, which richer coloration, has more mid-range growl, it effects the bass frequencies and highs differently than the Nickel. The Nickel transformers are cleaner than the iron, wider sound scape, more extended top, more detail, doesn't darken the sound as much, but equally impressive. The Juggernaut is really a preamp you have to listen to, it's completely different than all other preamps, it's quite unique, 3D, bigger than life. You can also interchange combinations, iron input & nickel output, iron input & iron output, nickel input & iron output, nickel input & nickel output.


Q: Do I need a rack to operate an APA Juggernaut 500 preamp?
A: Yes. We recommend using the APA Revolver Rack or API 6B. The Juggernaut will work in all 500 series racks.


Q: What is the difference between the APA Revolver Rack and the API 6B?
A: The Revolver Rack is a 2 Slot rack with the slots adjacent to each other, which can accomodate double width modules. The Revolver Rack is unlike all other 2 module racks because it is able accomodate double width modules and can used on your desktop and also able to be rackmounted. The Revolver Rack is lightweight and extremely portable. The API 6B Lunchbox holds 6 single modules (3 double width) and is portable with a carry along handle. If saving space or portability is your major concern then the Revolver would be best, if you are looking to rack as many modules as possible, the 6B is more economical. The Revolver Rack provides 400 mA of power between 2 spaces, the API6B provides 800mA of power between 6 spaces.


Q: Does the Revolver Rack come with a power supply?
A: Yes. It is built right into the rack. The supply is internal.


Q: Is the Revolver Rack 230V compatible?
A: Yes. We recommend ordering it directly from us already wired for 230V usage, to switch the power from 110V to 230V requires a qualified technician. We do not recommend trying to change the wiring if you are not qualified.


Q: Do you have anything larger than the Revolver Rack?
A: Yes, we sell the API6B (6 space), API 10 space, Purple Sweet Ten (10 space).


Q: Why are there two knobs on the preamps?
A: The top knob is the gain in 41 stepped increments. The bottom knob is the impedance seletion also in 41 stepped increments, you can sweep from as low as 300 ohms to as high as 10,000 ohms.


Q: What is 'boost' for?
A: The boost button allows you to boost the gain by engaging the button. Once engages you can see there is another set of numbers to right, it looks like this "6/20", "20/35", "50/70", when engages you will be able to get 70dbs of gain on the maximum setting rather than 50dbs. Without the boost, the preamp provides between 6 and 50 dbs of gain, and with the boost engages it will provide between 20 and 70 dbs of clean gain.


Q: What is '+THD' for?
A: The +THD button allows you pad the output by 10dbs by engaging the button. Once engages you will hear the pad trim the volume, to bump it back up, click your gain about 5 - 7 clicks to compensate if you wish to saturate the transformer for more tone.


Q: Why is there an optional nickel output transformer?
A: When we developed the Juggernaut, we had tried different transformers on the output of the preamp, and we liked these two in particular, the iron and the nickel. Rather than concluding that we would only choose one and stick with that sound, we decided to give people the option to also get the nickel transformer if they choose. We have the iron output transformer come standard on the unit, so all Juggernauts are made the same, with the same output. For people who like the idea of switching the output transformers that option is there.


Q: Does the Juggernaut have instrument level DI?
A: Yes.


Q: I don't see an XLR on the Juggernaut 500 mic preamp, where am I supposed to plug in my microphone?
A: A Juggernaut preamp is a modular card that plugs into our Revolver rack system. The rack provides power to the preamp cards. The XLRs are located on the back of each rack. The Juggernaut is API(tm) compatible so any 500 series rack will work.


Q: Does the APA Revolver rack have inserts on the back so I can go simutaneously to my console and also to my A/D converter to avoid latency?
A: No. There is not enough room in the rack and would require extensive modifications to the 500 series format rack. We have found that most modern soundcards use direct monitoring (such as MOTU, RME, Lynx, etc) and this system of splitting the signal in this manner is no longer necessary.


Q: Is the Juggernaut Twin and Juggernaut 500 Class A?
A: Yes. 100% Class A Discrete electronics.


Q: My Juggernaut 500 has three transformers, what does three transformers mean?
A: There are 3 transformers mounted on the Juggernaut's PCB. Two of the transformers are supposed to remain permanently mounted, these two are the switchable input transformers, the iron and nickel transformer. To switch between these two transformers use the push buttons on the front of the Juggernaut. The third transformer is the output transformer. We install the iron output transformer as standard on all Juggernauts. We also have made a custom nickel output transformer available as an option, if you choose to purchase a nickel output transformer there are instructions in the manual which instruct how to switch your output transformer.


Q: Is it an extra cost for 48V phantom power for my Revolver rack?
A: No. All Revolver racks provide 48v as standard for no extra cost.


Q: Can I rack mount the Revolver Rack?
A: Yes. You can actually rack 1, 2, or 3 Revolver racks in a 2U space. We have 3 kits available. The RK-1 is for racking 1 Revolver, the RK-2 is for racking 2 Revolvers, and the RK-3 is for racking 3 Revolvers.


Q: What is the warranty on an APA product?
A: Each APA product comes with a 1 year manufacturer's warranty. Warranty does not cover any failure due to abuse, shipping damage, (i.e. dropping the unit, using the wrong PSU, fire, attempting to modify the unit, etc, etc). Warranty does not cover shipping costs to and from the factory.


Q: Can you make your own rack?
A: You could, but you would already need to have the knowledge and experience to build electronic devices. We do not recommended building your own rack, it may void the warranty on the preamps if the rack or the homemade supply causes damage to the preamps. This would take much more knowledge and effort than just buying a ready to go new Revolver Rack.


Q: Are Juggernaut 500 preamps and Leviathan 500 Compressor compatible with Brent Averill, Purple Audio, OSA, and API Racks?
A: Yes. All modular APA products will work in the 500 series racks.


Q: Are Brent Averill, Purple Audio modules, Empirical Labs DerrEsser, Great River MP-500NV, API preamps, eqs, and compressors compatible with Atlas Revolver Racks?
A: Yes, with the exception of the Chandler Germanium 500 preamp, on the Chandler website it specifies that the Germanium 500 should not be loaded into any rack with an internal supply. All other 500 series modules will work in Revolver Racks, even vintage 500 series preamps should work properly.


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