The Ampeg Opto Comp is an analog optical compressor pedal from Ampeg, demonstrated alongside the Liquifier Analog Chorus at NAMM 20181. It was introduced as one of the latest additions to Ampeg's growing pedal line2, and Ampeg's demo material describes it as an extremely musical sounding bass compressor1. It shares the rugged, roadworthy construction and pedalboard friendly size that matches the existing Ampeg pedals3.
The pedal uses an optical circuit, the approach Ampeg says delivers "smooth, vintage-style compression, just like expensive pro studio compressors"4. Optical compressors read your signal with a light-dependent element rather than sensing it directly, which is the design behind several well-known studio units and a whole family of pedal compressors, including the Demeter Opto-Compulator, the BBE Opto Stomp, the OVNIFX Smoothie and the Mozztronics CO-2 Opto-Comp. For a wider look at the category, see compressor pedals.
What it does to your sound
Compression evens out the difference between your loudest and quietest notes, and an optical design like this one tends to do that gently rather than clamping down hard. Ampeg's own framing is that the pedal is "extremely musical sounding" and the right compressor for the job1, while Premier Guitar's reviewer, writing in 2026, found it subtle rather than aggressive:
"It's a subtle pedal that's clean and transparent, not a super squasher to lifelessness."
That review describes the pedal as gently managing the peaks and valleys of a performance without dominating the overall sound2. In other words, this is not a pedal for heavy squash or pronounced pumping effects; it is aimed at players who want their dynamics smoothed out while the basic character of their instrument stays intact.
The controls
Ampeg's product page describes the pedal's operating philosophy as "Simple 2-knob control over the compression characteristics"4. Of those controls, the maker names one explicitly: the Output control, which "dials in makeup gain to preserve volume"4. Makeup gain is the volume you add back after compression has pulled your signal down, so your compressed sound is not quieter than your clean one.
Premier Guitar's reviewer, though, counted differently: "The white metal box has just three knobs to get your head around"2.
Either way, the control count is small by compressor standards, and that is the point. Compare it with other optical pedals in the same family2:
| Pedal | Controls | What the extra controls do |
|---|---|---|
| Ampeg Opto Comp | 2 knobs per Ampeg (3 per Premier Guitar), including Output makeup gain42 | Kept deliberately simple |
| Mozztronics CO-2 Opto-Comp | ATTack, THReshold, Range switch | Attack sets how fast compression engages, Threshold sets where it starts, Range selects the sensing frequency range5 |
| OVNIFX Smoothie | Includes a Direct knob | Blends uncompressed signal back in for parallel compression6 |
| Demeter Opto-Compulator | Volume and level of compression | Vintage Guitar called its operation "disarmingly simple"7 |
The Opto Comp sits at the simplest end of that spectrum, closer to the Demeter than to the Mozztronics with its attack, threshold and range controls57. Players who want to shape how fast the compressor grabs a note, or blend clean signal alongside compressed signal, will find those options on other pedals in this family rather than here.
One small detail from the review: the pedal carries a purple-ish LED that lights to show the pedal is engaged2.
Build, bypass and board placement
Ampeg's launch announcement promised "rugged, roadworthy construction, true-bypass switching, and a pedalboard friendly size" that matches the existing Ampeg pedals3. True bypass means the pedal's circuit is taken entirely out of the signal path when it is off, which matters to players who leave effects disconnected for long stretches of a set.
The pedal was demonstrated as part of a pair with the Liquifier Analog Chorus at NAMM 2018, with both pedals sharing the same rugged construction, true-bypass switching and pedalboard friendly size13.
Where it came from and where it went
The Opto Comp debuted at NAMM 2018, where Ampeg demonstrated it alongside the Liquifier Chorus1. Ampeg's demo material presented it as an extremely musical sounding compressor pedal, and the pedal remains part of the company's effects lineup14.
What reviewers said
Published coverage of the pedal itself is limited but consistent. Premier Guitar's 2026 quick-hit review is the main published verdict, and it was positive on the pedal's transparency and restraint, quoting the "subtle, clean and transparent" assessment above and noting the $99 street price2. The reviewer also framed the pedal within Ampeg's broader push into effects:
"Ampeg cares, and they've made it easy with the analog Opto Comp, one of the latest additions to their growing pedal line."
At launch, the press coverage established the core specifications: analog optical circuit, true bypass, and rugged, pedalboard friendly construction3. Ampeg's own pages carry the current product description and the "extremely musical sounding" framing from its demo material41.
Videos
Sweetwater
Premier Guitar
Ampeg
Questions
Is the Ampeg Opto Comp analog?
Yes. Ampeg describes it as an Analog Optical Compressor pedal, and Premier Guitar's reviewer also calls it an analog pedal. It uses an optical circuit, the compression approach associated with classic studio compressors, rather than a digital model of one.
How many knobs does the Ampeg Opto Comp have?
Ampeg's product page describes simple 2-knob control over the compression characteristics, with an Output control for makeup gain. Premier Guitar's reviewer counted three knobs on the white metal box.
How much does the Ampeg Opto Comp cost?
At launch in January 2018 the Opto Comp carried a US MSRP of $139.99. Premier Guitar's 2026 review listed it at $99 street. Prices can move after launch, so treat the street figure as the more current one.
Is the Ampeg Opto Comp made for bass players?
Yes. Ampeg's own pedal index lists it as the Opto Comp Bass Compressor, and the pedal was announced alongside the Liquifier as one of two new analog pedals for bass and guitar. It works for both instruments, but bass players are the clear target.
Where can I find the Ampeg Opto Comp manual?
Ampeg publishes an English owner's manual as a PDF on its support site, at ampeg.com under the Opto Comp Analog Compressor support page. The manual is the maker's own document and the place to confirm controls and power details.
Is the Ampeg Opto Comp true bypass?
Yes. Ampeg's 2018 announcement for the Opto Comp and Liquifier specified true-bypass switching on both pedals, along with rugged, roadworthy construction and a pedalboard friendly size matching the existing Ampeg pedal range.
Sources (7)
- Ampeg | Pedal Series :: Manuals and Videos, Ampeg (ampeg.com), 2018-01
- Quick Hit: Ampeg Opto Comp Review, Premier Guitar, 2018-05-21
- NAMM 2018: Ampeg Reveal Liquifier Chorus + Opto Compressor Pedals, Guitar.com, 2018-01-25
- Ampeg | Pedal Series :: Preamps and Effects, Ampeg
- Mozztronics CO-2 Opto-Comp Optical Compressor, Pedal of the Day, 2021-04-28
- OVNIFX Smoothie Opto Compressor, Delicious Audio, 2019-03-22
- Demeter Fat Conrol, Compulator, and Reverb, Vintage Guitar magazine, 2005-12-01
