Comparison

RRS EQ173 vs Filterjam

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

Head to head
About

RRS EQ173

This audio plugin emulates a vintage mic/line amplifier with comprehensive EQ controls. It offers a demo mode with limited playtime and an unlimited version available via in-app purchase. Features include stereo/mid/side EQ, undo/redo, and a scalable GUI.

Highlights
  • Standalone and AUv3 plugin
  • Modeled vintage EQ
  • Stereo, Mid, or Side EQ modes
  • Undo/Redo functionality
  • A/B comparison
  • Scalable GUI
Read full description

EQ173 AUv3 plug-in — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the EQ173 AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of EQ173 AUv3 plug-in comes as In-App Purchase. Red Rock Sound EQ173 is based on introduced in 1970, this hallowed class-A, transistor mic/line amp with EQ epitomizes the beautiful sound, with unparalleled clarity, sheen and bite. Features: • Standalone and AUv3 plug-in; • Modeled vintage EQ; • Stereo (Mono), Mid or Side EQ modes; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. PREAMP SECTION: • Line Gain — Line drive is increased as the knob is rotated counter-clockwise. Range: -20 to +10; • Mic Gain — To increase the mic drive, rotate the knob clockwise. Range: -20 to -80. PreAmp will not increase gain, just harmonic distortion. The distortion is mild and adds some coloration. EQ SECTION: • High Band — The High Shelf knob offers approximately ±15 dB of smooth fixed frequency shelving equalization at 12 kHz. Rotate the control clockwise to add the famous high-end sheen, or counter-clockwise to reduce the treble response; • Midrange Band— The midrange band is controlled by two knobs, delivering smooth semi-parametric midrange equalization. The right knob controls the band gain, and the left knob selects the band frequency or band disable. The response for this band has a dependence on the bandwidth as the gain is adjusted. At higher center frequencies, the Q goes up for a more focused peak; • Low Band — The low band delivers smooth low frequency shelving equalization, controlled by two knobs. The right knob controls the band gain, and the left knob selects the shelf frequency or band disable. The available range is approximately ±15 dB. The band gain is zero when the knob position indicator is pointing straight down; • Low Cut — This knob specifies the fixed frequency of the low cut (high pass) filter. This filter has an 18 dB per octave slope. The available frequencies are 50 Hz, 80 Hz, 160 Hz, 300 Hz and OFF. MASTER SECTION: • Input — Input adjusts the signal level at the input of the plug-in without effecting the sonic character of the signal. The available range is ±24 dB; • Phase — The PHASE button inverts the polarity of the signal. When the switch is engaged, the phase is inverted. Leave the switch in the disengaged for normal phase; • EQ — The equalizer is engaged when the EQ switch is engaged. To disable the EQ, disengage the switch. In the EQ173 the audio is still colored even when the EQ switch is disengaged and the EQ settings are in their «flat» positions. This is due to the fact that the signal is still passing through PreAmp circuitry; • Output — Output adjusts the signal level at the output of the plug-in without effecting the sonic character of the signal. The available range is ±24 dB. To use EQ173 as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — EQ173 will appear in the list of Audio Unit extensions for effect plug-ins in the host app.

About

Filterjam

This app offers a multiband resonant filter for creating unique audio effects. It divides input signals into four bands, allowing for various sonic manipulations from subtle enhancements to extreme sound mangling.

Highlights
  • Multiband resonant filtering
  • 4-band signal division
  • Sum or multiply band modes
  • Versatile sound shaping
  • Ringmod-like effects
Features
Read full description

Filterjam is a multi-band resonant filter delivering weird ringmod-like filtered sounds. The input signal is divided into 4 bands that are then summed or multiplied together according to the selected mode. Filterjam can be very harsh or gentle, it can add brightness or depth to synth sounds, but it can also completely mangle acoustic sources.

Screenshots

RRS EQ1734 screens
Filterjam2 screens

Verdict

The call

The clearest difference is in-app purchases: Filterjam at none against RRS EQ173's 1. RRS EQ173's advantage is update cadence (monthly vs every 22 months) and review sentiment (100% vs 83%). On price, rating, ratings volume and ads 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

Both are free to download. RRS EQ173 sells 1 one-off in-app purchase. Filterjam asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for RRS EQ173 against 5.0 for Filterjam. Both are backed by a comparable volume of ratings — 22 and 34 respectively. Written reviews are what separate them: 100% of RRS EQ173's written reviews are positive against 83% of Filterjam's.

UpkeepUpdate frequency

RRS EQ173 ships an update monthly, Filterjam every 22 months. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
RRS EQ173 versus Filterjam: the parameters behind the verdict, then further details
ParameterRRS EQ173Filterjam
PriceFreeFree
Rating4.9 (22 ratings)5.0 (34 ratings) — better
Positive reviews100.0% of reviews — better83.3% of reviews
Number of ratings2234 — better
Update frequencyMonthly — betterEvery 22 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better14.0
Further details — not scored
Size16 MB25 MB
Age rating4+4+
DeveloperRRS, OOOAudioThing Ltd.

Customer experience

RRS EQ173

All ratings22 ratings
Positive95.5%
Neutral4.5%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Filterjam

All ratings34 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral16.7%
Negative0.0%

In-app purchases

1 purchases

RRS EQ173

One-time1
  • RRS EQ173 Unlimited$4.99
None

Filterjam

No in-app purchases

Questions

Is RRS EQ173 free?
RRS EQ173 is free to download, with in-app purchases available.
Is Filterjam free?
Filterjam is free to download, with no in-app purchases.
Which has better reviews, RRS EQ173 or Filterjam?
Filterjam is rated higher. RRS EQ173 averages 4.9 out of 5 from 22 ratings, while Filterjam averages 5.0 from 34 ratings.
Do RRS EQ173 or Filterjam have ads?
Neither RRS EQ173 nor Filterjam shows ads.
Which is updated more often, RRS EQ173 or Filterjam?
RRS EQ173 ships an update monthly, and Filterjam every 22 months. Most recently, RRS EQ173 was updated on October 24, 2026 and Filterjam on October 24, 2026.

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