• Aurisonics ASG-2.5 Review

    May 25, 2015 Luckbad 12

    Bring on the thunder and lightning.

    Aurisonics’ flagship triple driver hybrid combines the incredible sub-bass of the ASG-B’s 14.2mm dynamic driver (plus a tuneable bass port) with two balanced armature tweeters for a unique earphone experience.

    Aurisonics ASG-2.5 Features

    • Triple Driver: Hybrid combination of 14.2mm Precision Dynamic Driver with custom tuned next generation tweeters.
    • Tuneable Bass Port: Tune the bass for precise, mechanical tuning of low-mid bass frequencies.
    • 3D printed, Digital Hybrid Technology (DHT)™ shell: Fits 95% of ears like a custom (Hybrid custom/universal fit derived from thousands of ears scanned…).
    • Born in Music City: Hand-crafted with pride in the heart of Music City, Nashville, TN.
    • Color Options: Available in Polished Black, Polished Red, Brushed Nickel, and 24k Gold.
    • Custom: The AS-2.5 is the custom version of the ASG-2.5, adds an Ambient Port option for pass-through sound, and has additional color options.

    Aurisonics ASG-2.5 In the Box

    • ASG-2.5 earpieces
    • Detachable silver-plated low oxygen copper cable (92 Pin Style connector)
    • Shock/Dust/Waterproof hard case
    • SureSeal™ tips
    • Cleaning brush
    • Valve adjustment tool

    ASG-2.5 Package contents

    Aurisonics ASG-2.5 Impressions

    If I were to have one complaint about the Aurisonics ASG-B I reviewed a couple weeks ago, it’s that they lacked clarity and no amount of EQ would be able to get you perfect, sparkling highs. The ASG-2.5, however, includes two balanced armature tweeters in addition to the 14.2mm dynamic driver it uses to produce its incredible bass response. Clarity and detail are excellent, and the tuneable bass port (which, being a basshead, I have fully open) is a welcome addition for those of you who aren’t as into bass as I am.

    The ASG-2.5 floats effortlessly between rap, EDM, classical, rock, blues, and every other genre I’ve thrown at them. These are some of the most versatile IEMs I’ve used–as well as some of the most expensive. With their versatility, however, these approach real affordability since I have half a dozen other earphones that serve a more specific genre well (e.g. I use the JVC HA-FXZ200 almost exclusively for bass-heavy but subued electronic music and Pioneer SE-CX8s for hard-hitting rap and EDM). The ASG-2.5 can do virtually anything you want them to.

    I rarely talk about audiophile terminology like soundstage, but I have to betray my standard for simplicity by commenting on it with these earphones. The soundstage is out of this world. Listening to a track like Chesky Records’ Jesu, Joy of Man’s Desiring is almost transcendental in its delivery and staging. While I usually drop some of the mid-bass and low-mids to lay the sound back a bit, I actually like to remove my equalizer from the equation entirely listening to the Chesky tracks.

    To speak only of the basshead potential of this earphone, it is second to none in its bass depth and ability to cause your chest to rumble and breath to catch. It is only equaled by its bass-player-centric sibling, the ASG-B. Coupled with the ASG-2.5’s ability to shine with nearly all music genres, this could be the end-game basshead IEM for many. It lacks only in bass punch and impact when compared to the Pioneer SE-CX8/SE-CX9, and those only achieve their mind-blowing levels of impact with a proprietary Bass Exciter, so it really isn’t a flaw of the ASG-2.5 to have less raw impact.

    If any other company boasts that it has the end-game IEM for bassheads that can challenge the ASG-2.5, I welcome the opportunity to review them (Lear, 1964 Ears, AAW, Tracluent, Sony, JVC, errybody else, I’m lookin’ at you).

    No earphone is perfect, so let’s talk about a few of the things I’d criticize.

    The mid-bass is a bit bloated and clouds the mids with the bass port fully open. I prefer to have it cut off by ~150Hz for the ultimate basshead experience, so I use EQ to drop the mid-bass and low-mids a bit (see the frequency response graph to see where it’s a bit high).

    CAUTION: Don’t use the case they send you. The case that comes with this flagship IEM is inexcusably small. If used, it can actually damage the casing of the earphones. They sent me an extra clamshell case, and I expect Aurisonics to replace the included case in the future (they’ve commented as such, which is great that they’ve listened to customer feedback).

    If you are looking at IEMs in this price category, you definitely have a good amp to complement them, right? If you don’t, you shouldn’t consider an earphone at this level until you have a good DAC and Amp to drive them. The ASG-2.5 needs a good amp to sound great, so don’t try driving them directly from your phone or you’re doing these beauties an injustice.

    Others often criticize the SureSeal tips as being hard to find a proper seal. I liked them for the ASG-B, but curiously agreed with others for the ASG-2.5 and used double-flange tips instead.

    Conclusion: The Aurisonics ASG-2.5 is my current top pick overall for a basshead IEM. It has matchless sub-bass depth, solid impact, and manages to give you the best of both worlds with its dynamic driver providing deep bass and 2x balanced armature tweeters delivering crystal clarity.

    Aurisonics ASG-2.5 Frequency Response Graph

    This curve was generated using a Dayton Audio EMM-6 Electret Measurement Microphone, Focusrite Scarlett 2i4 audio interface, and Room EQ Wizard. The mic calibration file was provided by Dayton Audio and the output calibration file was generated using the program itself (3.5mm out on PC to 1/4″ input on Scarlett 2i4).

    Frequency Response Graph for ASG-2.5 (Bass Fully Open and Bass Fully Closed) and ASG-B

    • ASG-2.5 Bass Port Fully Open = Red
    • ASG-2.5 Bass Port Fully Closed = Green
    • ASG-B = Blue

    Quick Notes

    • ASG-2.5 Bass Port Fully Open (Red) and ASG-B (Blue) are virtually identical up to ~700Hz.
    • ASG-2.5 Bass Port Fully Open (Red0 and ASG-2.5 Bass Port Fully Closed (Green) become identical after ~1500Hz.


    Aurisonics ASG-2.5 Specifications

    • Driver: Precision Dynamic 14.2mm + 2 custom-tuned, next generation tweeters
    • Frequency response: 8Hz – 25kHz
    • Impedance: 41 ohm +/- 10% @ 1kHz
    • Sensitivity: 123dB @1mW
    • Passive noise attenuation: NRR 22db
    • Construction: 3D printed, Digital Hybrid Technology (DHT)™ shell fits 95% of ears like a custom (Hybrid custom/universal fit).
    • Cable: Detachable silver-plated low oxygen copper cable
    • Colors: Polished Red, Polished Black, Brushed Nickel, 24k Gold
    • Warranty: 1-year

    Aurisonics ASG-2.5


    Bass Impact


    Bass Depth


    Overall Sound


    Build Quality


    Reviewer Bias



    • Thunderous bass depth
    • Bass complemented by clarity of 2 BA tweeters
    • Doesn't need EQ to provide satisfying bass
    • Adjustable bass port
    • Comfortable, fits like a custom


    • Expensive
    • Small case may damage earphones
    • Needs an amp to shine
    • Some dislike the stock tips
    • Mid-bass overemphasized w/ bass port open

    Categories: Basshead IEM, Reviews

    Tags: , , , ,

    12 thoughts on “Aurisonics ASG-2.5 Review

    • Richard says:

      Would the amp in a Fiio X3ii do these justice?

    • Luckbad says:

      It can likely do them some justice from the specs. I think HawaiiBadBoy runs his Fiio X5 into a Cayin C5 before the Aurisonics ASG-2.5, and the X3ii has the same amp as the X5. It’s possible that it’s completely unnecessary, though.

    • hawaiibadboy says:

      Awesome review! Looking forward to the one on HF.

    • James says:

      Ok so I have been looking for ages and I can’t seem to find a in ear that does what I want perfectly the jvc fxz200 are what I use now and as far as I’m concerned the sound signature is PERFECT to my ears but they arnt very comfortable I’m looking for something that has better fit with As close to the same sound signature as possible. I have a good dac and amp and am wondering if the asg 2.5 is the headphone I’m looking for? If I could get the drivers from the fxz200 in a custom shell I would do that but I don’t know any company that does that so… How would you compare these asg 2.5’s to the fxz200’s???

      • Luckbad says:

        The Aurisonics and JVC sound nothing alike, to be honest. You might look at the JVC HA-FX850,750, or 1100. They have a reportedly similar sound signature but are lower profile.

        • James says:

          Thanks for the reply! Ya I actually own the fx850’s because of all the reviews about them sounding similar but the truth is they are not even close to the fxz200’s imo. But I would say they are decent for more of a jazz type music if that’s what you’re into.

      • Luckbad says:

        Out of curiosity, what tips have you tried? I find the FXZ200 to be pretty comfortable with the Monster Supertips, and more comfortable (with a little less isolation) with the NarMoo S1 tips (you can get these on their website if you don’t have their earphones). The stocks are not great for me.

    • chris says:

      hi there, thanks for the review. I own a pair of asg 2.5 but i dislike the tips. Do you have a few tip references compatible with the 2.5 to share?
      its a bit hard to find information on the subject, even Aurisonic is not really knowing what other brands of tips are compatible. thanx

      • Luckbad says:

        Hey man! They have a wide bore, so you’ll want something that is fairly wide.

        All of these will fit.

        * Monster Gel/Foam Supertips – Get the assorted sizes and gel/foam mix–they have spacers too, and will fit just about anything.
        * Sony Hybrids – One of the most recommended and versatile tips.
        * JVC Victor Spiral Dot – One of the most recommended versatile tips.
        * NarMoo S1 – http://www.narmoo.com/index.php?main_page=product_info&cPath=2&products_id=6
        * Comply Isolation or Comfort Tips – 500 series
        * MEElectronics M11+ – http://www.meelec.com/category_s/380.htm
        * Earphones Plus assortment – Amazon: Large – L-TRI2-SQ2-C6-BLK | Medium – M-TRI2-SQ2-C6-BLK | Small – S-TRI2-SQ2-C6-BLK

    • Ellenzu says:

      Hi there, thanks for your awesome review. I just got the ASG 2.5 and really love it, but I’m still looking for a way to make the sound better by upgrading my amp/cable. I already have the Lear C2 cable and Sound Blaster E5 Portable Amp (didn’t see any improvement over my iphone 5s except the volume is higher; I also see no different between bluetooth mode vs Streaming through usb mode) My question are which cable will be an upgrade over the Lear C2 cable (budget: under $150) and which amp will shine the ASG 2.5 “bright like a Diamond” (budget: under $200, please suggest me both desktop and portable ver)

      • Luckbad says:

        I’m a fan of Linum cables: http://linum.dk/

        They have several offerings and you can ping them to be sure the cable would fit (I don’t recall what type of connector the ASG-2.5 has).

        For under $200, honestly you aren’t going to get much better than the Creative E5.

        It’s reasonably good. The Schiit Magni 2/Modi 2 stack would be superior, as would the Emotiva Big Ego (small but not really portable).

        Anything better is gonna run the price up. The iFi iCAN Micro is solid as an amp only and isn’t much more than the $200 (could find it used for under). You could run the Line Out from the E5 to it and get some good performance increases. That’s desktop only.

        The Garage1217 Project Polaris has no bass boost and is also desktop only, but it’s an even better amp than the iCAN for the same price. No 3D mode or bass boost, but you get various fun options to tweak.

        If you’re on Head-Fi, contact jmills8. He has used several cables and is a huge Aurisonics fan.

    • A friend says:

      Hey! Fantastic review, Is there a case that you can recommend for the ASG 2.5? Also, do you know the connector type for these IEM’s? Thanks.

    Drop the Bass

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