GlowerPassive EQ plugin · the low-end trick, silky air and tube warmth on three knobs
The only passive EQ plugin you'll ever need for a bigger bottom, silky air and tube glow.
The classic passive tube EQ moves on three knobs: the low-end trick on LOW, a broad, silky lift of the air on TOP, and tube warmth and glue on TUBE. Pick the SOURCE, a kick, a bass, a vocal or a whole mix, and every knob is level-matched, so you hear the tone, not just louder.
- Use it on 5 computers per copy
- Lifetime updates
- 90-day money-back guarantee
- Download link in minutes
- VST3, AU and AAX, Windows and macOS
- Try it free
Formats and DAWs
Windows 10 and 11 (64-bit): VST3 and AAX
macOS 11 or later: VST3, AU and AAX
Works in any 64-bit DAW that loads VST3, AU or AAX plug-ins.
Licence
Use it on up to five of your own computers per copy you buy. Yours for good, no subscription. Unlock it with your email and a six-digit code, no dongle and no password. It checks in now and then and works offline in between.
Delivery
Download links by email within about five minutes, and always in your account under Downloads.
Hear the difference
The same dry sound, without and with Glower.
Kick, the low-end trick
A drum loop with a light kick · Kick / Big Kick Trick
Bass, rounder
An electric bass line · Bass / Round Bass
Vocal, sheen and glow
A dry sung lead · Vocal / Rock Vocal Sheen
Full mix, fuller and silky
A full-mix loop · Fuller and Silky (the default)
Every clip is level-matched, so the difference you hear is tone, not volume.
Glower in action
Why Glower
The low-end trick on one knob
Boost and cut at the same low frequency, together: the bottom gets bigger and rounder while the mids above it step back. One knob, LOW, turns both, so the famous move takes seconds.
Silk on top
TOP is a broad, gentle lift of the air at 10 or 16 kHz, smooth rather than sharp: a vocal opens up, a master gets its sheen.
Tube glow that never just gets louder
TUBE adds warmth and glue after the EQ. An auto input level means it acts the same on a quiet track and a loud one, and every knob is level-matched.
Low. Top.
Two big knobs do the work: the low-end trick at the bottom and a broad, silky lift on top, at the frequencies SOURCE picks for your track.
- VST3 · AU · AAX
- Windows and macOS
- 32 samples latency
- 13 presets
The passive EQ plugin
- The low-end trick on one knob. Boost and cut together at 30, 60 or 100 Hz: weight without mud.
- Silky air. A broad, smooth high boost at 10 or 16 kHz.
- Tube glow, the same on every track. An auto input level before the tube, so TUBE means the same on a whisper and a master.
- Level-matched. Every knob and preset sits at the dry signal's loudness, so you hear the tone, not just louder.
- LOW and TOP (0 to 10) with the frequency printed under each, and TUBE (0 to 100 %).
- SOURCE: KICK (60 Hz / 10 kHz), BASS (100 Hz / 10 kHz), VOCAL (100 Hz / 16 kHz) or MIX (30 Hz / 16 kHz).
- MIX, IN and OUT with meters, ENGAGE, a safety stage under -1 dBFS and 32 samples of latency.
- 13 factory presets and your own preset files; A/B, undo and redo, MIDI Learn on every control; a window from 75 to 200 %; the full manual.
SOURCE
Kick, bass, vocal or mix.
One click sets LOW's and TOP's frequencies for what you are working on: 60 Hz for a kick, 100 Hz for a bass or a voice, 30 Hz and 16 kHz for a whole mix.
What Glower does
Every control has one job: the passive tube EQ sound you hear in your head, faster.
LOW
The low-end trick on one knob
A boost and a cut at the same low frequency, turned up together, the cut at three quarters of the boost: the bottom swells while the mids above it dip out of the way, for weight without mud. 0 to 10, the classic scale: +3.2 dB under the frequency at 4, steeper past 6, up to +12 dB at 10.
TOP
Silky, broad air
A wide, gentle high boost at 10 or 16 kHz, 0 to 10: about +2.2 dB at the default 6.5 and +6.5 dB at 10. Broad enough that the 16 kHz setting lifts 12 kHz too, so a voice opens up without getting sharp.
TUBE
Warmth and glue
A tube stage after the EQ, mostly even harmonics. Its line reads CLEAN, WARM, GLOW or DRIVEN as you turn it. At 0 the tube is out of the circuit altogether; from there to 10 % it fades in.
Auto input level
The same tube on every track
Before the tube, Glower brings your track to one working level and puts it back after, so TUBE 50 % sounds the same on a quiet vocal and a loud master, and the tube never just makes it louder.
SOURCE
The right frequencies in one click
KICK: 60 Hz and 10 kHz. BASS: 100 Hz and 10 kHz. VOCAL: 100 Hz and 16 kHz. MIX: 30 Hz and 16 kHz, the default. The line under LOW and TOP always prints the frequency they work at, and a change glides, click-free.
Level-matched
Hear the tone, not louder
Every knob position and every preset is matched to the dry signal's loudness, so turning LOW or TOP up changes the tone and not the volume, and a fair before and after is one click on ENGAGE.
Mix, IN and OUT
Parallel EQ on one knob
MIX blends the whole effect with your dry signal, 100 % by default. IN and OUT set the level, -24 to +24 dB, with meters on both.
Safety stage
Boost freely
The EQ boosts, so the output can pass the input: a fast stage holds the peaks under -1 dBFS, and a 15 Hz filter keeps the tube's sub-bass rumble out of your mix.
13 sourced presets
Start from settings that work
The big kick trick, kick weight, round and fat bass, rock vocal sheen, warm thin vocal, air lift, a silky master, glue and glow, gentle polish, the low-end trick on a master and tube warmth alone, each from documented settings.
A/B, undo and MIDI Learn
Take complete control of your workflow
Two complete settings to compare, undo and redo, and MIDI Learn on every control: right-click a knob, move a controller, and it is yours.
32 samples of latency
Track and mix through it
The tube stage runs oversampled, so Glower is 32 samples late at every setting, under a millisecond, and tells your DAW so it lines up.
Tubes that glow
See the tube work
The three tubes' filaments follow the tube stage's drive, brighter as TUBE goes up and the music gets louder, down to embers at TUBE 0 or bypassed. The light pooled under them follows the output.
Inside the plugin
The Glower window: two big knobs, SOURCE, TUBE and three glowing tubes.
Every feature
Everything in Glower, down to the smallest switch.
35 features
The EQ
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LOW
The low-end trick on one knob: boost and cut together, 0 to 10
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TOP
A broad, silky high boost at 10 or 16 kHz, 0 to 10
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TUBE
Tube warmth and glue after the EQ, 0 to 100 %
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SOURCE
KICK, BASS, VOCAL or MIX: the frequencies picked for you
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Frequency readouts
The frequency LOW and TOP work at, printed under each
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Auto input level
TUBE means the same on a quiet track and a loud one
Mix and output
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MIX
The whole effect against your dry signal, for parallel EQ
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Level-matched
Every preset within 0.15 LU of the dry on its material
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Safety stage
Peaks held under -1 dBFS however hard you boost
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Sub-bass filter
A 15 Hz filter keeps the tube's rumble out
Workflow and control
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A/B compare and A>B
Two complete settings, switch in one click
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Undo and redo
Step back and forward, or press Ctrl+Z
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MIDI Learn
Take complete control of your workflow: right-click any control, move a knob
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Host automation
Automate every control from your DAW
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ENGAGE
Click-free bypass, to hear the before and after
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IN and OUT meters
See the level going in and coming out at a glance
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Tooltips
Every control explains itself as you point at it
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Resizable window
75 to 200 %, and the size you pick is remembered
Presets
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13 factory presets
Starting points built from real settings producers use
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Previous and next arrows
Audition presets one click at a time
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Save your own
Keep your settings as .tubepassiveeqpreset preset files
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Open presets folder
Back up or share your presets in one click
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Reset to default
Back to a clean start in one step
Performance
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32 samples of latency
Under a millisecond, at every setting, reported to your DAW
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Light on CPU
About 4 % of one core; under 2 % at TUBE 0
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Mono or stereo
On a kick, a bass, a vocal, a bus or a master
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Audio-reactive face
The tubes glow with the tube stage's drive
Licence and compatibility
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VST3 and AAX, Windows 7 SP1 or later
Loads in any 64-bit Windows DAW with VST3 or AAX
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VST3, AU and AAX, macOS 10.13 or later
Loads in any Mac DAW with VST3, AU or AAX, Intel or ARM
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5 computers per copy
Studio, laptop and more on one licence
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Email and code unlock
No dongle, no password, no extra app
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Works offline
No internet needed between check-ins
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Check for updates
From the plugin's menu; nothing installs without asking
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Lifetime updates
Every future update included
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Platinum priority support
Questions answered by the people who build it
How Glower compares
The classic passive tube EQ moves on three knobs, level-matched.
| Glower | Typical passive EQ plugins | |
|---|---|---|
| The low-end trick | Boost and cut together on one knob | Two knobs to balance by ear |
| Frequencies | SOURCE picks them for a kick, bass, vocal or mix | Several switches to look up |
| Loudness | Every knob and preset level-matched | Often louder as you boost |
| Tube stage | Built in, the same on quiet and loud tracks | Often a fixed drive, or none |
| Parallel blend | MIX on the panel | Often missing |
| Output safety | Peaks held under -1 dBFS | Often clips when you boost |
| Try-and-compare | A/B, A>B, undo and redo | Often missing |
| Hardware control | MIDI Learn on every control | Often host automation only |
| Licence | 5 computers per copy, no dongle, works offline | Often fewer activations, or a dongle |
| Updates | Lifetime updates included | Often paid upgrades |
"Typical" describes what we commonly see in this category; it does not describe any particular product. Glower facts are from the plugin and its manual, October 2026.
What you get
Vox Samples
90-day money back · Thank you
Specs and system requirements
- Formats
- VST3 and AAX on Windows; VST3, AU and AAX on macOS
- Operating system
- Windows 7 SP1 or later, 64-bit; macOS 10.13 or later, universal (Intel and ARM)
- Host
- Any 64-bit DAW that loads VST3, AU or AAX plug-ins
- Channels
- Mono or stereo
- Sample rates
- Whatever your session runs at
- Latency
- 32 samples at every setting (0.67 ms at 48 kHz), reported to your DAW
- Low
- Boost and cut together (the cut at 75 % of the boost), 0 to 10: +3.2 dB at 4, +4.7 at 6, +9.3 at 7, +12 dB at 10
- Top
- A broad high boost, 0 to 10: +2.2 dB at 6.5, +6.5 dB at 10
- Source
- KICK 60 Hz / 10 kHz, BASS 100 Hz / 10 kHz, VOCAL 100 Hz / 16 kHz, MIX 30 Hz / 16 kHz (default MIX)
- Tube
- 0 to 100 %, behind an auto input level: harmonics -42 dB at 25 %, -35 at 50 %, -28 at 75 %, -22 dB at 100 % (a 1 kHz tone at -18 dBFS RMS)
- Level
- Every preset within 0.15 LU of the dry at -18 and -26 LUFS in (the median on its material)
- Output
- Peaks held under -1 dBFS; a 15 Hz sub-bass filter
- Presets
- 13 factory presets; your own as .tubepassiveeqpreset files
- Window
- 960 x 600 at 100 %, resizable from 75 to 200 %
- MIDI
- MIDI Learn from any controller routed to the track
- Licence
- 5 computers per copy you buy. Unlock with your email and a code we email you. Checks in now and then and works offline in between.
- Internet
- Needed once to unlock, then for the occasional check-in
90Day money-back guarantee
Our guarantee
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90-day money-back guarantee
Not for you? Email contact@voxsamples.com within 90 days for a full refund.
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5 computers per copy
Use it on up to five of your own computers per copy you buy, and move it yourself from the plugin's Licence menu.
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Lifetime updates
Every future update and upgrade of Glower, included.
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Platinum priority support
A real person at contact@voxsamples.com, first in line.
Try Glower free
The whole plugin, with the same sound as the full version and no time limit. It goes silent for a moment every few seconds; the full version never does.
Windows and macOS installers in one download. Like what you hear? Get the full version on this page, with a 90-day money-back guarantee.
Questions
What does a passive tube EQ sound like?
Big, round, warm lows that grow without getting muddy, and a smooth, silky top that adds air without harshness, with a gentle tube thickness to glue it: broad, forgiving colour, never surgical. Glower gives you those moves on three knobs, level-matched.
What is the low-end trick?
Boosting and cutting at the same low frequency at once. The boost lifts the bottom, the cut dips the frequencies above it, and the bass gets bigger and rounder without getting muddy. On Glower it is one knob, LOW, at the frequency SOURCE picks.
Why doesn't it get louder when I turn it up?
Every knob is level-matched to your dry signal, so you hear the change in tone and not just more volume. Use OUT if you want it louder.
Is it a tube EQ?
Yes. TUBE adds a tube stage after the EQ, mostly even harmonics, with an auto input level in front of it so it acts the same on a quiet track and a loud one. At 0 the tube is out of the circuit.
Does it add latency?
32 samples at every setting, under a millisecond, because the tube stage runs oversampled. Glower reports it to your DAW, which lines everything up.
Does it work in my DAW?
Any 64-bit DAW that loads VST3, AU or AAX plug-ins, on Windows 7 SP1 or later or macOS 10.13 or later. There is no standalone app.
How many computers can I use it on?
Up to five of your own for each copy you buy. To move it, deactivate it in the plugin on the old computer and unlock it on the new one.
Does it need the internet?
Once, to unlock it with the code we email you. After that it checks in now and then and works offline in between.
Is there a manual?
Yes. The full manual explains every control, every preset and the menus, with tips. It opens from the help key (?) in the plugin's top bar, and lives at https://voxsamples.com/glower-tube-passive-eq-effect-manual.
What if it's not for me?
Request a refund from your account within 90 days.
Founder's Story
"When COVID hit, I finally had time to dive into music production—only to discover I was missing the right tools. The plugins I tried were clunky, overloaded with unnecessary features, and killed my vibe with endless tweaking. I knew there had to be a better way.
So, with my engineering background, I started making free and simple audio plugins for my producer friends. They loved them! That’s when I set out on a mission to create plugins that save you time, streamline your workflow, and keep your creativity flowing."
- Ryan Svensson (Founder & CEO)
Bigger bottom. Silky top. Tube glow.
The low-end trick on one knob, broad air, tube warmth that acts the same on every track, and every knob level-matched.
$42.55 AUDNormaler Preis $141.86 AUD70% off
- 90-day money back
- Five computers
- Lifetime updates
Pairs with
Glower Tube Passive EQ Effect
$42.55 AUDNormaler Preis $141.86 AUD70% off