When I finalized my plans to attend last August's Audio Advice Live manufacturer showcase in Raleigh, North Carolina, publicist Jaclyn Inglis contacted me in advance to gauge my interest in a show demonstration of IsoAcoustics' new GAIA Neo loudspeaker isolators. Her excitement for the product line sold me, and I quickly agreed to stop by and have a listen; in a happy coincidence, good friend The Listening Room's Howard Kneller also arrived in the IsoAcoustics room for Friday morning's demo. As I mentioned in my show coverage (you can read more about that HERE), two otherwise identical pairs of JBL Summit Series loudspeakers were present in the room, with one of the pairs fitted with GAIA Neo isolators. Francois Cauchon of IsoAcoustics proceeded to play a selection of tracks while alternating between the pairs of loudspeakers, A/B'ing to assist us in hearing any performance differences between the stock pair of JBL Summits and the pair fitted with GAIA Neos.
For me the difference was stunningly obvious, even under less-than-ideal show conditions. The JBLs fitted with the IsoAcoustic isolators clearly had an advantage over the stock pair, with greater clarity, a more impressive dynamic presentation, a more focused stereo image, and a greatly enhanced impression of musicality when compared to the alternate pair. It was perhaps one of the most startling A/B demonstrations I've ever encountered in any audio environment. And clearly proved to me the ability of IsoAcoustics' GAIA Neo isolators to improve the performance of very likely any loudspeaker—at any price point—and across a wide range of performance metrics. Howard and I were both in agreement that there was a distinctly audible difference in the before-and-after demonstration, and I quickly reached out to Jaclyn to express my enthusiasm for getting a set of the GAIA Neos for review at Positive Feedback.
Francois Cauchon of IsoAcoustics couldn't suppress his enthusiasm for the GAIA Neo Isolators!
In the aftermath of Audio Advice Live, two loudspeaker models arrived at my home for review, pairs of upgraded Klipsch Heresy IV's and the new SVS Ultra Evolution Towers. Jaclyn and I agreed that folding both loudspeakers into the GAIA Neo review was a great idea, and she contacted IsoAcoustics to determine which model was the correct choice for use in my evaluation. It was decided that the GAIA Neo II was appropriate for both loudspeakers, but production delays would likely push their delivery back until early October. Once the Klipsch and SVS loudspeakers were up and running, I shared details with Jaclyn regarding the recent reconfiguration of my listening environment, and also detailed my ongoing experiments with a quad of Vera-Fi Audio Caldera subwoofers. She then also offered to send four sets of IsoAcoustic Aperta Sub isolators, so that all transducers in the system would receive a similar level of benefit from IsoAcoustics' product line. The Aperta Sub isolators arrived near the end of November, and everything was now in motion for my evaluation.
That's where the wheels came off for me personally and professionally, and my inability to get anything done rocked my world. The 2025 holiday season leading into New Year's 2026 was the worst on record for my wife and I, with both of us hammered by a barrage of maladies. An inner-ear infection left me virtually deaf in one ear for six-plus weeks, and Beth succumbed to a sequence of seemingly unrelated illnesses that eventually resulted in a diagnosis of Collagen Vascular Disease. I wasn't functioning on all cylinders, but was effectively thrown into the role of being her caregiver throughout the holidays and into early February. That crippled my ability to get any work done throughout the period, but thankfully, the insanity has gotten nearly under control in the past few weeks!
The science behind the IsoAcoustics isolators
Firstly, let's take a look at the technology employed by the IsoAcoustics range of isolators: all GAIA, Neo, and Aperta isolators use a patented, proprietary isolation material that's designed to minimize the effects of vibration and lateral loudspeaker movements, as well as isolate loudspeakers from variables introduced by the floor surface supporting them. GAIA Neo Series isolators employ individual upper and lower isolators that, in combination with their internal inserts, successfully manage all vibrations. Eliminating those vibrations helps your loudspeakers achieve tighter bass, greater clarity and openness, an improved soundstage, and more naturally spatial and three-dimensional imaging.
Compatibility with a wide range of loudspeakers is paramount to IsoAcoustics, and GAIA Neos ship with several common size choices for the threaded inserts used to attach them to your loudspeakers. Each isolator also features an integrated O-ring to ensure a proper fit between the isolator and loudspeaker, and rubber compression washers are included that can be used to improve compatibility with certain loudspeaker designs. GAIA Neos are fully adjustable in terms of height and tilt; leveling your loudspeakers couldn't be easier, and dialing-in any necessary angle for correct tweeter dispersion is also effortless. GAIA Neos will achieve more perfect synergy with your loudspeakers when their logos are forward facing and in the same direction as the drivers on the face of the loudspeaker. Floor slider discs are provided to assist with loudspeaker positioning, and optional spiked carpet discs provide a more secure foundation in carpeted listening environments.
Floorstanding loudspeakers are taller and tend to be more finicky in terms of leveling, but that's much less of a concern with subwoofers, so no level adjustment is possible (or necessary) with the Aperta Sub isolators. The Aperta Sub isolators feature a sculpted aluminum frame that has all four isolators firmly attached; it's (somewhat counterintuitively) positioned with the isolation points centered along the confines of each outer wall of your subwoofer. Unsurprisingly, the IsoAcoustics logo also faces forward. Carpet discs were included with each Aperta Sub isolator, which allowed for perfect integration with the loudspeakers in the system. The Aperta Sub isolators were slightly less substantial in construction than the GAIA Neos, but their comparatively lower cost didn't reflect any decrease in the effectiveness of their performance.
The GAIA Neo II's and Aperta Sub isolators get properly integrated into the system
All the delays I experienced at the outset of this evaluation allowed me ample time to rethink my intended system setup with each set of isolators, and astonishingly, I've managed to reach what I consider to be their ideal implementation in my current system configuration. I'm using the GAIA Neo II's interchangeably with the Klipsch Heresy IV's and SVS Ultra Evolution Towers, and they're perfect for each loudspeaker's weight range. The Aperta Sub isolators will work with a range up to 80 lbs per sub—even with the Vera-Fi Audio Caldera subs stacked in their present arrangement, the Aperta's are still well within their comfort zone.
After having heard the effectiveness of the GAIA Neos at Audio Advice Live, I was really keen to hear how they'd respond in my own system. Both the Klipsch and SVS speakers had been sliding in and out of my listening sessions for many weeks in advance of the arrival of the IsoAcoustics isolators. The highly-efficient Klipsch Heresy IV's (99dB/watt) were being mostly used in a setup that employed my Reisong Boyuurange A50 Mk III single-ended triode amp (7-wpc 4/8 ohms) that sports 300B triode power tubes; the tube complement had been upgraded with a full set of RAY Tubes' Reserve 300B's, 6SN7's, and a Select 5U4 rectifier. The less-efficient SVS Ultra Evolution Towers required the kind of solid-state brawn my Naiu Labs Ella amplifier (250/500/1kW into 8/4/2 ohms) delivers in spades. Both loudspeaker models were brand-new out of the box, and needed substantial break-in to get anywhere close to the kind of sound quality I expected from them. Especially the SVS Ultra loudspeakers, which just weren't impressing me with their ability to play anything at reference output levels. That changed with the arrival of the IsoAcoustics GAIA Neo II isolators, which have enhanced the performance of both sets of loudspeakers exponentially.
My system recently underwent a massive change conceptually, where I repositioned the loudspeakers and equipment stack using a long-wall orientation. That has resulted in an unbelievable improvement in every performance metric I value in terms of how my system reproduces music. The quad of Vera-Fi Audio subs initially were implemented following a dare from friend and fellow audiophile Finnbogi Sigurdur Marinosson, who challenged me over a year ago to concurrently set up all four subs in the same room (you can read about that HERE). I started most recently with the subs scattered around the reconfigured room, but eventually settled on stacking them. That decision followed a precedent set by sub manufacturer REL, and the setup substantially mirrored my previous exploration. Surprisingly, everything quickly snapped into place; the subtle smearing of bass frequencies with all four subs placed at floor level was completely gone, and the resulting sound was now more evenly balanced and free from any colorations.
Attaching the GAIA Neos to either set of loudspeakers seemed at first a bit cumbersome, to say the least, and it took two people to switch them between the Klipsch and the SVS the first time. After having removed and replaced the Neos repeatedly throughout the evaluation, the process eventually became more effortless, and for the typical user, only a single installation would ever be required. Several sets of common threaded insert sizes are supplied, and once the correct size is determined for the specific loudspeaker, the insert is then screwed into each GAIA Neo. The isolator then screws into the loudspeaker's base, with the IsoAcoustics logo facing forward. The bottom ring on each GAIA Neo rotates to adjust each isolator's height; the process is effortless compared to the method used on their more basic designs. Once the isolators are in position and the speaker is leveled, the metal carpet discs are ready to be installed. The carpet discs definitely increased the rigidity of the loudspeakers, especially the unwieldy SVS Ultra Evolution Towers. Another quick level check afterwards confirmed everything was good to go!
One set of IsoAcoustic Aperta Sub isolators were placed below the Vera-Fi Caldera 12 subs, with a second set placed underneath the Caldera 10 subs that were stacked on top of them. That works within the specified weight range for the Aperta Sub devices, and I can't argue with the results, which have been nothing less than spectacular! Carpet discs are supplied with the Aperta Sub isolators, and as with the GAIA Neos, they add a significant level of rigidity to the installation. As I mentioned above, having done this now multiple times (as I experimented with subwoofer placement), the setup and installation of the Aperta Sub isolators was effortless.
Listening results
Having had both the Klipsch Heresy IV's and SVS Ultra Evolution Towers in place for weeks prior to the arrival of the IsoAcoustics isolators, I already had a pretty good idea regarding how they responded in my room and in my system. Even though I expected to hear a difference based on my experience at Audio Advice Live, I wasn't prepared for a performance increase that exceeded my expectations with every selection I played. With the SVS Ultra Evolution Tower loudspeakers—which are top-heavy, tall, and not particularly stable when mounted to their stock footers or spikes—adding the IsoAcoustic GAIA Neo isolators gave them a much appreciated feeling of stability. I was more comfortable with them in the room, and no longer worried about bumping into them and knocking them over, taking out whatever might happen to be in their path.
I appreciated the big difference in their stability, but hearing them quickly became a next-level event. I'd been less than ecstatic about their performance and musicality, despite having burned them in for well over 100 hours, but they still weren't capable of playing music at reference levels that was musically satisfying or without coloration. Especially in the bass region, where each tower's four 5.25 inch woofers seemed to distort while playing even very manageable selections. Suddenly, the SVS Towers were capable of playing everything I threw at them—effortlessly—and at any volume level. Whereas prior to the arrival of the IsoAcoustic GAIA Neos, they seemed incapable of satisfying me, with the Neos in place, they suddenly never failed to impress me! A great example of an extremely challenging track they reproduced perfectly is Tool's "Chocolate Chip Trip" from their album Fear Inoculum, which is a favorite many audiophiles use to show off their system's low-bass response capabilities. Not only did the SVS Ultra Evolution Towers play "Chocolate Chip Trip" perfectly, but the system shook the walls of my home in a way that seemed as though the whole house might collapse around me! A wide-eyed guest who was present looked at me at the track's conclusion and proclaimed "Damn, man!" The quad of subs mounted with the Aperta Sub isolators provided an unearthly subterranean foundation of bass that was both deep and perfectly controlled, and their integration with the mains was seamless. Helping this very challenging music achieve legendary status in my range of playback experiences!
That impressive level of goodness wasn't limited to brash displays of cacophony; even Rickie Lee Jones' classic Pop Pop was delivered with a level of lyricism I wouldn't have believed possible from the SVS Towers. Legendary jazz bassist Charlie Haden plays acoustic bass on many of the album's tracks, with two in particular, the opener "My One and Only Love" and "I'll Be Seeing You" containing deep bass that will distort across just about any loudspeaker. Equipped with the IsoAcoustic isolators, the SVS Towers and Vera-Fi subs sailed through those tracks without issue, providing one of the finest representations of this music I've ever heard, on any system. Another favorite, Patricia Barber's jazz classic Nightclub, is one of the best albums I own, with an unbeatable mixture of Barber's smoky-sweet vocals and her superb piano playing; Jim Anderson's excellent recording is the icing. Whether across the system via Impex's 180 gram, 45 rpm LP or a newly acquired MoFi SACD, the music was rendered with impressive clarity and dynamic musicality. "Autumn Leaves" is a perfect demo track, and Marc Johnson's acoustic bass plumbs the depths, while maintaining the inherently good "woody" quality I love to hear in great jazz recordings. The SVS Ultra Evolution Tower loudspeakers went almost overnight from getting boxed and returned to the manufacturer to being enshrined with near-classic status.
Upon their initial insertion into my system, the Klipsch Heresy IV's didn't engender a level of apathy in me that approached what I originally felt for the SVS towers. But neither did they blend seamlessly with the quad of Vera-Fi subwoofers, and the Heresy's 12-inch fiber composite woofer and rear-firing port imparted a touch of bloat to the bass output. Which seemed to be present regardless of where or how far out into the room I positioned them. Massed percussive passages displayed a slight congestion and tubbiness, and that lack of clarity masked subtle details in the midrange and high frequency horn drivers. Regardless of whether they were being driven by solid state or tube amplification, and that impression held true for the couple of months in the system, although they did improve with sufficient break-in.
I'm generally more of a "multiple smaller woofers" kind of guy (hence my attraction to the SVS towers) versus a single larger woofer like the 12-incher used in the Heresy IV's. And that proclivity definitely held true in my early exposure to the Heresy's, but adding the full IsoAcoustics treatment has clearly altered that impression. The newfound seamlessness of the Heresy's with the quad of Vera-Fi subs has exponentially enhanced their ability to reproduce tuneful and articulate bass, and that touch of bloat has completely disappeared. Upon first getting the 300B SET tube amp, the main thrust of my lobbying to get the Heresy IV's for review was to assist with that setup by adding a much higher efficiency loudspeaker (99dB/watt) into the mix. And that setup would definitely employ a strictly analog source, in a more intimate listening environment. That rationale has gotten turned on its ear with the arrival of the IsoAcoustics isolators; the 300B SET system (7-wpc) can easily crank Black Sabbath, Dead Can Dance, Depeche Mode, Yello, Kraftwerk—even Tool's "Chocolate Chip Trip"—and never skips a beat. Intimate environment, indeed!
Of course, that's not to say that the Heresy IV's don't play with finesse—nothing could be further from the truth. Through them (and the SVS towers, as well) I'm hearing some of the most delicate portrayals of classic jazz, jazz vocals, chamber ensembles—everything I play through this system with the IsoAcoustics isolators attached is delivered with equal measures of delicacy or bombast, as required by the music. And for complete clarity, the tonal improvement yielded by the GAIA Neos and Aperta Sub isolators affects every octave of the spectrum. Even though the improvement in any system's bass response might be the first thing noticed, the lack of bass coloration definitely allows the listener to hear improvements in the mids and treble. Which absolutely sparkle given the significant reduction in vibrations and microvibrations. There's definitely no going back to the way things were prior to the arrival of the IsoAcoustics isolators; the very thought of removing them fills me with a sense of complete dread.
I'll update this review in the very near future with my additional evaluation of how my new production KLH Model Five loudspeakers are responding to the GAIA Neos. The Model Fives are easily one of the best box-type acoustic suspension loudspeakers out there, and the only one so far that could supplant my beloved Magneplanars from daily use in my listening environment. That said, they also exhibit a few non-linearities that the GAIA Neos would definitely improve upon. I'll need to make some minor modifications to the Model Five's dedicated stands to achieve this, but it will happen soon, and I'll definitely get back to you on this!
Final thoughts
I've been employing resonance and microvibration control with all amps and source equipment for years, with devices from both Vera-Fi Audio and AV RoomService underneath my turntable, preamp, DAC, digital music server, BluRay universal player, and SACD transport. But the IsoAcoustics isolators mark the very first time I've had vibration isolation in place with both loudspeakers and subs simultaneously—along with everything else—and I'm beyond shocked by the difference! For whatever unknown reason, I failed to fully grasp the importance of isolating both loudspeakers and subwoofers for years, and experimenting with the IsoAcoustic isolators has been truly enlightening!
Hearing impressive presentations at audio shows has been fairly common in my range of experiences, but successfully replicating the magic afterwards in my own listening environment has often proved more elusive. That said, having the IsoAcoustics GAIA Neo II and Aperta Sub isolators in my own system not only recreated the show experience, they've elevated the goodness to a level I'd never have thought possible. Are they the cure for poorly performing loudspeakers and subs? Maybe—but beyond doubt, the inclusion of the IsoAcoustic isolators at the very least afforded my loudspeakers and subs an environment that allowed them to fully perform to their potential, and with near-perfection. The perfect foundation they created easily translated into perfect performance, and I'm beyond shocked by the before-and-after transition in a way that has far exceeded the level of incredulity I experienced at Audio Advice Live last fall. I'm blown away, for lack of a better choice of words!
While it's fairly intuitive to expect isolation devices to prevent transmission of vibration and microvibrations to source equipment, this evaluation has made it quite obvious that it's equally important to limit or prevent the interaction of floor-borne vibrations with your loudspeakers and subwoofers. Following this experience with IsoAcoustics isolators, I now know my system could never come close to reaching its full potential without them. The difference isn't subtle, and I'd defy anyone to find otherwise. At their relatively low price points, purchasing GAIA Neo and Aperta Sub isolators is a no-brainer; your listening experiences will be significantly elevated, and you'll never look back with any level of regret. I own a couple of sets of IsoAcoustics pucks, and while they've always performed perfectly in their limited use situations, I've never given a great deal of thought to using them elsewhere. Following this experience, I definitely need to reevaluate that stance!
Many thanks to Jaclyn Inglis and everyone at IsoAcoustics for making this review possible. I can't recommend the IsoAcoustics GAIA Neo and Aperta Sub isolators highly enough—my eyes have definitely been opened!
GAIA Neo II isolators
Retail: $439.99 (set of 4) (optional carpet discs $84.99)
Aperta Sub isolators
Retail: $169.99 (each)
IsoAcoustics
All images courtesy of IsoAcoustics and the author
