Audio & Headphones · Head-to-head
IsoAcoustics ISO-155 Isolation Stands vs Primacoustic IsoWedge Monitor Isolation Pads
Which should you buy? Our verdict on both, pulled from our full The Best Speaker Isolation Pads: 4 Compared (and One to Skip) comparison.
The ISO-155 is the only product here that treats height and tilt as part of the job rather than an afterthought, and IsoAcoustics is the only maker in this group that publishes third-party lab testing at all. The IsoWedge does the decoupling half competently for a fraction of the outlay, which is the right answer if your speakers are already at the right height.
IsoAcoustics ISO-155 Isolation Stands
Buy itA stand, not a pad, and the only option here that lets you set height and tilt independently.
- Height is genuinely adjustable, from 3 in (76 mm) short to 8.2 in (210 mm) tall, so the tweeter can actually reach ear level.
- Up to 6.5 degrees of tilt up or down, set with inserts rather than by stacking foam.
- IsoAcoustics publishes a white paper on anechoic and laser-vibrometry testing at the National Research Council of Canada, which is more than any other maker here does.
- The NRC testing in that white paper was run on the GAIA hi-fi isolators, not on the ISO series, and no numeric axis values are given in the text.
- Weight rating drops from 40 lb (18 kg) at the short setting to 35 lb (16 kg) at the tall setting, so heavy monitors and full height do not combine well.
- The tube-and-spacer assembly is fiddly to reconfigure once monitors are on it.
Primacoustic IsoWedge Monitor Isolation Pads
Buy itPlain high density polyurethane foam that does the decoupling job and, unusually, comes with a published spec sheet.
- Primacoustic states the material as high density polyurethane foam and a load limit of 44 lb (20 kg), a figure that sounds like it was measured rather than rounded up.
- A fixed 6 degree slope that works either way up, so you can aim a monitor down from a meter bridge or up from a low desk.
- Primacoustic states the pads pass California's C117 fire retardant certification, which is a real third-party standard rather than a sound claim.
- The slope is fixed at 6 degrees, so you get one angle up, one down, and nothing in between.
- At 2 in (51 mm) tall it adds almost no height, so it will not fix a tweeter sitting below your ears.
- Primacoustic publishes no acoustic measurements for these pads, only a description of what decoupling does.
Side by side
The 8 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| IsoAcoustics ISO-155 Isolation Stands Our pick | Primacoustic IsoWedge Monitor Isolation Pads | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Someone whose monitors currently sit too low on a desk and who wants decoupling and correct tweeter height from one purchase. | Anyone whose speakers already sit at roughly the right height and who just wants them off the desk without spending much. |
| Price tier | $$$ · premium | $ · budget |
| Type | Decoupling stand with adjustable height | Foam wedge |
| Height added | 3 in to 8.2 in (76 to 210 mm) | 2 in (51 mm) |
| Tilt | Up to 6.5 deg up or down, set with inserts | Fixed 6 deg slope, usable either way |
| Stated load limit | 40 lb (18 kg) short, 35 lb (16 kg) tall | 44 lb (20 kg) |
| Materials named by maker | ABS frame, stainless steel poles, proprietary isolators | High density polyurethane foam |
| Published test data | White paper on NRC anechoic and laser-vibrometry testing, run on the GAIA line | None acoustic; C117 fire rating stated |
| Footprint | 6.1 x 7.5 in (155 x 190 mm) per stand | 12 x 4 in (305 x 102 mm) per piece |
| What is in the box | Pair of stands | Four pieces |
Which one is right for you?
Pick the IsoAcoustics ISO-155 Isolation Stands if
someone whose monitors currently sit too low on a desk and who wants decoupling and correct tweeter height from one purchase.
Know before buying: the NRC testing in that white paper was run on the GAIA hi-fi isolators, not on the ISO series, and no numeric axis values are given in the text.
Pick the Primacoustic IsoWedge Monitor Isolation Pads if
anyone whose speakers already sit at roughly the right height and who just wants them off the desk without spending much.
Know before buying: the slope is fixed at 6 degrees, so you get one angle up, one down, and nothing in between.
The bottom line
Our overall pick is the IsoAcoustics ISO-155 Isolation Stands - A stand, not a pad, and the only option here that lets you set height and tilt independently. Choose the Primacoustic IsoWedge Monitor Isolation Pads instead if anyone whose speakers already sit at roughly the right height and who just wants them off the desk without spending much.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Speaker Isolation Pads: 4 Compared (and One to Skip).