ISP Technologies Decimator II Noise Reduction Pedal Review: The Ultimate Silencer for High-Gain Rigs
We have all been there: you finally dial in that crushing, high-gain tone on your Marshall or 5150, the harmonics are screaming, and the sustain feels like it could last for days. But the moment you stop playing, the room is filled with a cacophonous roar of preamp hiss, 60-cycle hum, and electromagnetic interference. It is a mood killer for the audience and a source of immense frustration for the performer. For years, I struggled with the trade-off between having enough gain to feel “alive” and the inevitable noise floor that came with it. Cheap gates would often “chatter,” cutting off the tail end of my notes or failing to open quickly enough when I dug back in.
Solving this problem isn’t just about making the quiet parts quiet; it is about preserving the integrity of your performance. Without a high-quality solution like the ISP Technologies Decimator II Noise Reduction Pedal, your delicate passages get buried in static, and your high-energy stops become messy. We found that many players end up compromising their tone by rolling back the gain or tone knobs just to keep the noise under control. That is why we spent weeks putting this specific pedal through its paces to see if it truly lives up to its legendary reputation in the industry. If you are ready to clean up your act, you can see its full feature set and user reviews to understand why this has become a staple on professional boards.
- Ultimate noise reduction pedal with unmatched performance
- Tracks the guitar signal directly from the guitar so you can leave the threshold setting alone
What to Consider Before Investing in High-End Signal Management and Effects
A Guitar Volume & Expression Effects unit—or in this specific case, a high-performance noise gate—is more than just an item; it’s a key solution for professionalizing your signal chain. When we evaluate these tools, we aren’t just looking for something that turns the sound off. We are looking for a device that understands the nuances of a guitar’s envelope. The goal is to achieve a studio-quality silence that makes your actual playing stand out with more punch and clarity. These devices are essential for anyone using high-gain amplifiers, stacking multiple overdrive pedals, or playing in venues with “dirty” electrical power that causes significant hum.
The ideal customer for this type of product is someone facing high-gain challenges in a live or studio environment, particularly those who refuse to sacrifice their sustain for silence. It is perfect for metal players, hard rock enthusiasts, and even blues players using vintage-style single-coil pickups that are prone to interference. However, it might not be suitable for those who play exclusively clean at low volumes or those who actually prefer the lo-fi “hiss” of vintage gear as part of their aesthetic. If you fall into the latter camp, a simple volume pedal might suffice, but for everyone else, the ISP Technologies Decimator II Noise Reduction Pedal offers a level of sophistication that is hard to beat.
Before investing, consider these crucial points in detail:
- Dimensions & Space: On a crowded pedalboard, every square inch is precious real estate. You want a pedal that offers a standard compact footprint without sacrificing build quality. We found that the weight of the unit also matters; a heavier pedal like this one (771g) stays put even when you are stomping on it in the heat of a gig.
- Tracking Performance: The most important metric for any noise reduction tool is how well it tracks the input signal. You should look for technology that monitors the guitar’s raw signal rather than just the noisy end of the chain. This ensures the gate knows exactly when you have stopped playing, regardless of how much gain you have added later.
- Materials & Durability: Since these pedals are frequently used in live environments, a rugged chassis is non-negotiable. Look for all-metal enclosures and high-quality footswitches. A chrome finish, like the one on the ISP Technologies Decimator II Noise Reduction Pedal, not only looks great but offers a layer of protection against the rigors of the road.
- Ease of Use & Maintenance: In a live setting, you don’t want to be menu-diving or adjusting ten different tiny knobs. A single-knob interface is often superior because it allows for “set it and forget it” operation. Long-term maintenance usually involves ensuring you have a clean DC power source, as batteries in high-performance digital/analog hybrid circuits can drain quickly.
While the ISP Technologies Decimator II Noise Reduction Pedal is an excellent choice for cleaning up your signal, it’s always wise to see how it stacks up against the competition. For a broader look at all the top models that help you control your dynamics and expression, we highly recommend checking out our complete, in-depth guide:
- Passive Volume Control/Expression Control 2 functions in 1 Pedal(Please use TRS cable, Or maybe can not control the volume gradually)
- Passive Volume /Expression guitar pedal Control 2 functions in 1 Pedal
- 【Versatile 2-in-1 Design】The Volume Expression Pedal combines both volume and expression control into one ultra-compact unit, making it an essential EXP & Volume 2 in 1 pedal for modern musicians...
First Impressions and Key Features of the ISP Technologies Decimator II Noise Reduction Pedal
Unboxing the ISP Technologies Decimator II Noise Reduction Pedal is an experience in tactile quality. The first thing you notice is the weight; it feels incredibly substantial and “bulletproof,” as many users have described it. The polished chrome finish is striking, standing out significantly from the standard painted enclosures of most competitors. There is no assembly required—you simply plug in your 1/4-inch cables and a 9V power supply, and you are ready to go. Before you start, we recommend you check the latest price and availability to ensure you’re getting the most current version of this hardware.
The design philosophy here is “elegant simplicity.” With only one knob to control the threshold, it feels remarkably approachable. However, don’t let the simple exterior fool you. Under the hood, this pedal features two new patents pending for its Linearized Time Vector Processing. This is a significant upgrade over the original Decimator and puts it leagues ahead of basic gates like the Boss NS-2 in terms of transparency. While some other pedals can feel like they are “clamping” down on your tone, the Decimator II feels like it is breathing with your playing. It’s a professional-grade tool shrunk down into a compact stompbox format.
Key Benefits
- Unmatched transparency that preserves the natural decay of your notes.
- Incredibly simple one-knob operation for quick on-stage adjustments.
- Heavy-duty chrome construction that can withstand years of touring.
- LINK IN/OUT feature allows you to sync two pedals for complex stereo or loop rigs.
Limitations
- Battery life is relatively short, making a dedicated power supply almost mandatory.
- The chrome finish, while beautiful, is a magnet for fingerprints and smudges.
Deep Dive: Why the ISP Technologies Decimator II Noise Reduction Pedal Dominates the Market
The Science of Silence: Understanding Linearized Time Vector Processing
In our extensive testing, the standout feature that truly defines the ISP Technologies Decimator II Noise Reduction Pedal is the Linearized Time Vector Processing. Most traditional noise gates use a fixed release time. This means if you set a fast release to catch staccato chugging, your long, sustained notes will get “chattered” or cut off prematurely. If you set a slow release, you get a distracting “whoosh” of noise after every short stop. We found that the Decimator II solves this by providing a more linear release response. It adjusts the release time dynamically based on your playing style.
When I played long, sustained solos on a Gibson Les Paul, the pedal allowed the note to fade naturally into silence without any of that annoying ripple or “gate flapping.” Conversely, when I switched to high-gain rhythmic metal riffs, the gate snapped shut instantly the moment I palm-muted the strings. This level of intelligence in an analog signal path is rare. One user noted that it tracks your touch like it’s “hanging on your every breath,” and we couldn’t agree more. It makes the pedal feel less like an effect and more like a natural extension of your amplifier’s circuitry. This is a feature that really sets it apart from the budget-friendly options that often struggle with complex envelopes.
Placement Power: Front-of-Amp vs. Effects Loop Integration
The versatility of the ISP Technologies Decimator II Noise Reduction Pedal is another area where it shines. We tested it in two primary configurations. First, we ran it directly after our overdrives and compressors before hitting the front of a clean amp. In this setup, it was masterful at killing the 60-cycle hum from a Fender Stratocaster and the hiss from a stacked gain stage. It effectively cleans up the signal before it ever reaches the preamp, which is crucial for maintaining a tight sound.
However, the real magic happened when we placed it in the effects loop of a high-gain head like an EVH 5150 or a Marshall JVM. By placing the Decimator II in the loop, it can kill the preamp hiss—the “white noise” generated by the high-gain tubes themselves. We found that setting the threshold to about 11 o’clock or -20dB was the “sweet spot” for most amps. It completely knocked out all noise during pauses without altering the tone. As one user mentioned, it’s a “set it and forget it” type of pedal. Once you find that threshold, you rarely need to touch it again, regardless of which guitar you plug in. If you have a noisy amp, this pedal is essentially the “STFU” button you’ve been looking for. You can order yours here to finally silence your rig.
The LINK System: A Future-Proof Strategy for Complex Rigs
For players with more complex setups, the ISP Technologies Decimator II Noise Reduction Pedal includes a 1/8-inch LINK IN and LINK OUT jack. This is a game-changer that we don’t see often in this price bracket. This allows you to link two Decimator II pedals together. Why would you want to do this? It allows the first pedal (at the start of your chain) to track your raw guitar signal and then “tell” the second pedal (in your effects loop) exactly when to open and close. This provides the most precise noise reduction possible because the tracking isn’t confused by the distortion and compression of your amp.
Even if you only start with one pedal, having this expansion capability is a huge benefit for future-proofing your board. We also noticed that the internal buffer in this unit is exceptionally high-quality. Some reviewers mentioned that their rig actually sounded “crisper” even when the gate was turned off, and we can confirm that the signal integrity remains top-notch. It doesn’t suck the “air” out of your tone like some digital gates can. This level of engineering ensures that your high-end frequencies stay intact, which is vital for that professional, polished sound. This is an investment in your overall tone quality, not just a way to kill noise.
Transparency and Tone Preservation: Keeping Your Soul While Killing the Noise
The biggest fear most guitarists have with noise gates is the loss of “feel.” We spent a lot of time analyzing how the ISP Technologies Decimator II Noise Reduction Pedal affects the dynamics of the instrument. In our experience, it is one of the most transparent pedals on the market. Whether we were playing subtle blues passages or aggressive hard rock, the pedal didn’t seem to “smother” the notes. The “attack” remains sharp, and the “decay” remains smooth. We found it particularly effective for cleaning up the “mud” that can accumulate when you stack a compressor with a high-output overdrive pedal like a Zakk Wylde signature drive.
In many cases, users who previously hated noise gates found themselves converted by the Decimator II. It manages to tame the idle hiss of a 100-watt Marshall head without making the amp feel “choked.” One user even mentioned they thought they would have to sell their favorite amp because of the noise, but this pedal “saved” it. It gives you the confidence to turn up the volume and the gain, knowing that the moment you stop, the silence will be absolute. This confidence translates into better performances because you aren’t constantly worried about feedback or hiss during the quiet moments of a song. To see how it can transform your specific setup, check out the detailed user feedback from players with similar rigs.
What Other Users Are Saying
The general sentiment among users is overwhelmingly positive, with many calling it the “gold standard” of noise reduction. We found that players using high-gain “workhorse” amps like the EVH 5150 were particularly impressed. One user noted that it “completely knocked out all the noise for pauses between notes” and took only 30 seconds to find the perfect setting. Another player mentioned that even with “dirty” power sources that usually cause hum, running the Decimator II at 11:30 killed the interference entirely without sucking the life out of their tone.
On the negative side, a few users pointed out that the battery life is quite short. One reviewer mentioned that the included battery died within a few hours of use. While this is common for high-performance pedals, it is something to be aware of—you should definitely plan on using a regulated 9V power adapter. A French-speaking user simply stated it is of “excellent quality and does the job it must,” which summarizes the international appeal of this unit. Some also noted that for the price, it would have been nice if a power adapter was included in the box, but this is a minor gripe considering the professional performance it delivers.
Comparing the ISP Technologies Decimator II Noise Reduction Pedal to Top Alternatives
While the ISP Technologies Decimator II Noise Reduction Pedal is a specialized noise reduction tool, players often look at other signal control pedals to round out their board. Here is how it compares to three popular expression and volume alternatives.
1. Jim Dunlop Volume X Mini Pedal DVP4
- MINI FOOTPRINT, FULL CONTROL: Delivers smooth swells, solid build quality, and pro-grade expression control at half the size—perfect for travel boards.
- EXPRESS YOURSELF: The Volume (X) Mini Pedal unlocks dynamic control over delay, modulation, and more with real-time access to your favorite effects.
The Jim Dunlop DVP4 is a fantastic choice for those looking to control their overall volume or use it as an expression pedal for other effects. While the Decimator II is an automated “gate,” the DVP4 gives you manual control. We found that the DVP4 is perfect for players who want to perform “swells” or manually cut their signal between songs. However, it won’t help you with the millisecond-fast noise gating required for modern metal. If you have the space, these two pedals actually complement each other perfectly on a professional board—the Decimator for automatic cleaning and the DVP4 for creative expression.
2. SONICAKE Vexpress Mini Guitar Volume Pedal
- Passive Volume Control/Expression Control 2 functions in 1 Pedal(Please use TRS cable, Or maybe can not control the volume gradually)
- Automatically Detect the Functionality (Volume or EXP Control)
For those on a strict budget or with very little board space, the SONICAKE Vexpress offers a 2-in-1 volume and expression solution. In our comparison, the build quality is significantly lighter than the tank-like Decimator II. While the Vexpress is great for casual hobbyists or those who just need a simple expression pedal for a multi-effects unit, it doesn’t offer any noise reduction capabilities. If your primary problem is hiss and hum, the SONICAKE won’t solve it, but it is a handy tool for managing output levels in a very compact form factor.
3. Donner Viper 2-in-1 Passive Volume Expression Pedal
- [2 in 1 Guitar Pedal] Combine passive volume pedal and expression pedal in one
- [Automatic Switching] Switch between volume and expression mode automatically by detecting input jack
The Donner Viper is another entry-level alternative that focuses on passive volume control. It’s a solid, “no-frills” pedal that doesn’t require power, which is a nice contrast to the power-hungry Decimator II. However, because it is passive, it can sometimes cause “tone suck” or a loss of high-end clarity depending on your signal chain. The Decimator II, with its active high-quality buffer, actually improves your tone’s clarity. We recommend the Donner Viper for beginners, but for serious gigging musicians, the ISP Technologies unit is a much more robust investment.
Final Verdict: Is the ISP Technologies Decimator II Noise Reduction Pedal Worth It?
After putting the ISP Technologies Decimator II Noise Reduction Pedal through its paces in various environments—from bedroom practice to high-volume rehearsal spaces—we can confidently say it is one of the best investments a guitar player can make. Its ability to provide near-instantaneous silence without butchering the sustain of your notes is truly impressive. While it is more expensive than some entry-level gates, the Linearized Time Vector Processing and the bulletproof chrome construction justify every penny. The only real drawbacks are the battery consumption and the fingerprint-prone finish, both of which are easily managed with a power supply and a microfiber cloth.
We recommend this pedal to anyone who is tired of fighting with their gear. If you use high-gain amps, noisy pedals, or just want your playing to sound more professional and “tight,” this is the solution. It is a “set it and forget it” tool that simply works, allowing you to focus on your performance rather than your noise floor. Don’t let your tone be held hostage by hiss and hum any longer. If you are ready to experience the power of professional-grade silence, we highly recommend you grab the ISP Technologies Decimator II Noise Reduction Pedal today and hear your guitar exactly the way it was meant to be heard.
Last update on 2026-06-29 / Affiliate links / Images from Amazon Product Advertising API