Spectra vs Sonarworks SoundID Reference
Written by the Spectra Audio team, so read it that way. The other column is written as Sonarworks’s own fans would write it, and every row where Sonarworks wins says so.
What it is
SoundID Reference is the professional standard for speaker and headphone calibration, and it is the only other product on these pages that measures a room. It does so with a calibrated measurement microphone, Sonarworks' own or another with a calibration file, sweeps the room from many positions, and produces a correction good enough that studios mix through it. It has a library of about 500 headphones measured in-house. It is a serious tool at a serious price, and it is what Spectra is honestly compared against.
Price: Tiers from about 99 to 449 EUR; the speaker tier needs a calibrated measurement microphone
What it is
A system-wide parametric EQ for macOS that measures your room with the iPhone you already own and fits a correction to it. No measurement microphone, no virtual driver, and every output keeps its own calibration, Bluetooth included. The measurement is the product; the EQ is the part everyone else also has.
Price: Free tier with an account; Base $59 one time; Pro $11.99/month, $99/year, or $179 one time. The $59 from Base counts toward Pro one time.
Pick Sonarworks if
- You mix or master for a living. SoundID Reference is a studio reference tool with a decade of trust behind it, and its measurement uses a real calibrated microphone.
- You already own a measurement microphone.
- You want in-house measured headphone profiles rather than community curves.
- You need a DAW plug-in version as well as the system-wide one.
Pick Spectra if
- You want the room corrected without buying a measurement microphone. Spectra measures with the iPhone you own. It is a consumer measurement, not a studio one, and it is priced like one.
- Your speakers are on Bluetooth. Sonarworks documents limitations on wireless outputs; Spectra's single-clock design is built for them.
- You want a one-time price that is not in the hundreds.
The table
| Feature | Spectra | Sonarworks SoundID Reference |
|---|---|---|
| Audio path | Yes Core Audio process tap in a private aggregate device, one clock. No driver, nothing added to Sound settings. | Partly Virtual audio driver for the system-wide app; also a DAW plug-in. |
| Parametric bands | Partly Free: 10-band graphic. Base: 5 parametric bands, three Q widths. Pro: unlimited bands, Q 0.1 to 10. | Not confirmed The correction is a filter set, not a user parametric EQ; band count is not the point of the product. |
| Per-app control | No The tap is device-scoped by design. One EQ per output, not per app. | No System-wide or in-DAW. |
| AutoEQ import | No No AutoEq or Equalizer APO file import yet. The headphone library is curated. | Not confirmed Not documented. |
| Headphone library | Partly Curated headphone calibrations, applied in one click. Small next to the AutoEq databases. | Yes About 500 models measured in-house on several physical units each. |
| Room measurement | Yes Pink-noise measurement through your iPhone over Continuity, correction fitted to your room. About 90 seconds. | Yes Multi-position sweep measurement with a calibrated microphone. The reference method. |
| Microphone needed | Yes The iPhone you already own. No calibrated microphone to buy. | No Yes, a calibrated measurement microphone. The Sonarworks mic ships with a per-unit calibration file. |
| Per-output profiles | Yes Every output keeps its own calibration and switches with the device, Bluetooth included. | Yes Profiles per output device. |
| Effects | Yes Dynamic EQ, Sub Bass Extension and Prism:X Stage at Base; deep settings at Pro. | Partly Spatial simulation as a paid add-on tier. No consumer effects. |
| macOS required | Partly macOS 26.2 or later. The strictest requirement in this category. | Yes Broad support; check the current version's requirements. |
| Distribution | Yes Developer ID signed, notarized, Sparkle updates. Not on the App Store because the tap needs entitlements the store does not grant. | Yes Direct and through dealers, license key, three devices. 5.13 shipped August 2026. |
The free ones
In 2026 six free, open-source system EQs shipped on the same Core Audio process-tap API Spectra uses. None of them measure a room, and several of them beat Spectra on bands per dollar and on file import. If a static curve is what you want, start here and keep your money.
- FineTune. Per-app volume, routing and EQ, with AutoEq profiles per output device. Edge: Per-app everything, a Homebrew cask, and the largest user base of the group. Caveat: Graphic EQ capped at 10 filters per profile; open Bluetooth desync reports without a maintainer reply as of September 2026.
- OnlyEQ. Unlimited parametric bands and the widest AutoEq and peqdb import support in the field. Edge: If you have a parametric file from anywhere, OnlyEQ loads it, for nothing. Caveat: Installed with a curl-to-bash script, not notarized, and its update signing key was reported lost.
- CoreEQ. 16 free parametric bands plus a fixed ladder, in a deliberately small app. Edge: Sixteen parametric bands and per-output profiles for free. Caveat: No headphone library and no file import yet; unsigned build.
- GlassEQ. A process-tap EQ that imports AutoEq, REW and impulse-response files. Edge: REW and IR import, which almost nothing else on the Mac does. Caveat: Alpha, ad-hoc signed and not notarized; a paid version is planned.
- Radioform. A notarized, GPL-licensed 10-band EQ with genre presets. Edge: Notarized and simple. Caveat: Uses a virtual driver rather than the tap; last release March 2026.
- SoundRouter Dore. Pay-what-you-want EQ with a browser hearing test and an ambience mode. Edge: Free, and the hearing-test idea is genuinely different. Caveat: Unsigned and unnotarized; its capture method is not documented.
Caveats
- Sonarworks' statements about Bluetooth and about USB microphones come from its support site, which could not be read directly when this page was written. The Bluetooth line above is deliberately conservative; read Sonarworks' own support pages before deciding on that basis.
- No latency figures are quoted for either product on this page because neither has published a measured number this page could cite.
- Spectra is in public beta. External audio interfaces are the least-tested path. If a row above is wrong about Sonarworks, email general@spectraaudio.tech and it will be corrected.
Measure your room once and decide
The free tier is a real system-wide 10-band EQ. The measurement is in Base, $59 one time. The first 25 beta testers get Pro free through the founders program.
Other comparisons: eqMac, SoundSource, Boom 3D, Sonarworks, and every eqMac alternative in one list.