Comparison

SGA Eclipse vs SL Knock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SGA Eclipse

This app offers authentic analog amplifier sounds for digital audio workstations. It simulates six different analog circuits, including vacuum tubes and transistors, to provide a range of saturation and distortion effects. It can be used as a standalone effect or in conjunction with other plugins to create full amp simulations.

Highlights
  • Authentic analog sound simulation
  • Six distinct analog circuits
  • Vacuum tube and transistor emulation
  • Variable bias and feedback controls
  • Automatic 4x oversampling
  • AUv3 effect plugin
Read full description

Eclipse brings the authentic sound of six analog push-pull circuits to your DAW. Each circuit derives its unique sonic character from a different active element: - 6L6 beam tetrode – Power tube commonly found in US audio power amplifiers in class AB push-pull configuration. - EL34 pentode – Power tube found, operating in class AB push-pull configuration, in audio power amplifiers and many European guitar amplifiers. - EL84 pentode – Power tube found in many European audio equipment, gainer than the usual pentode, operated in push-pull class AB configuration for maximum power output. - pair of complementary N- and P- MOS transistors found in CD4007 - 2N5457 and BF244B JFET transistors in mu-amplifier/SRPP/totem pole amplifier configuration found in some boutique guitar gear, including Shattered Glass Audio. To achieve the most authentic analog sound, each circuit is simulated in real time using Shattered Glass Audio’s state-of-the-art circuit simulator. Eclipse can be used to deliver anything from subtle saturation to ripping distortion, as well as in a tandem with a preamp simulation plug-in, such as our own Phoenix 2, and a speaker cabinet emulation plug-in to create a full amp. Key features: - Authentic analog sound through real-time high-performance circuit simulation. - Three vacuum tube push-pull configurations (fronted by a long-tailed phase splitter using 12AX7 triodes) featuring 6L6, EL34, and EL84 power tubes. - A complementary N- and P- MOS transistors in push-pull configuration. - Two mu-amplifiers featuring JFET transistors 2N5457 and BF244B. - Variable bias and feedback for each circuit for different saturation “flavors”. - AGC and parallel processing. - Automatic 4x oversampling. Eclipse is primarily an AUv3 effect. To use Eclipse as a plug-in, you will need an AUv3 compatible host such as Garageband, AUM, etc. Eclipse application is there to provide a user manual and a chance to use Eclipse with the microphone input. You can try Eclipse on a macOS or Windows based, machine by downloading the demo version of the plug-in (VST3, AUv2, AAX) from our website https://www.shatteredglassaudio.com and running it in a DAW of your choice. Sonically speaking there are no differences between the iOS and macOS/Windows versions of Eclipse.

About

SL Knock

Features
Read full description

SL Knock is a focused AUv3 dynamics and tone effect for adding punch, body and controlled low-end weight to drums, samples and loops. • Fast controls for impact and body • Tone shaping for tighter or heavier character • Mix control for parallel processing • Factory presets and local user presets • AUv3 support for compatible iPad music hosts Works as a standalone preview app and as an AUv3 effect in GarageBand, AUM, Cubasis, BeatMaker 3 and other compatible hosts.

Screenshots

SGA Eclipse2 screens
SL Knock3 screens

Verdict

The call

The clearest difference is price: SL Knock at $6.99 against SGA Eclipse's $24.99. SL Knock also leads on update cadence (weekly vs every 6 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

SGA Eclipse costs $24.99 and SL Knock $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SGA Eclipse ships an update every 6 months, SL Knock weekly. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 7 level
SGA Eclipse versus SL Knock: the parameters behind the verdict, then further details
ParameterSGA EclipseSL Knock
Price$24.99$6.99 — better
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.815.0 — better
Further details — not scored
Size49 MB28 MB
Age rating4+4+
DeveloperShattered Glass AudioVIACHESLAV ZHILTSOV

In-app purchases

None

SGA Eclipse

No in-app purchases

None

SL Knock

No in-app purchases

Questions

Is SGA Eclipse free?
SGA Eclipse costs $24.99, with no in-app purchases.
Is SL Knock free?
SL Knock costs $6.99, with no in-app purchases.
Do SGA Eclipse or SL Knock have ads?
Neither SGA Eclipse nor SL Knock shows ads.
Which is updated more often, SGA Eclipse or SL Knock?
SGA Eclipse ships an update every 6 months, and SL Knock weekly. Most recently, SGA Eclipse was updated on October 12, 2026 and SL Knock on October 16, 2026.

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