How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 7 min read · Independent comparison
If you want one pair of earplugs that lets you dial your own noise level up and down all day long, choose Loop Switch 2; if you need to turn any wired hi-fi system into a wireless aptX Adaptive receiver, choose SLASH 5.
• Loop Switch 2 — biggest strength: three passive noise-reduction levels (Quiet, Engage, Experience) in a single earplug, switched by an in-ear dial, with 20–26 dB SNR of reduction and no batteries to charge.
• Loop Switch 2 — biggest trade-off: it is a hearing-protection product, not audio gear. There is no Bluetooth, no DAC, no streaming — it only manages how much sound reaches your ears.
• SLASH 5 — biggest strength: a flagship ESS ES9219 32-bit Quad DAC with LDAC and aptX Adaptive support, dual RCA (2.7Vrms) and 3.5mm (1.0Vrms) outputs, and ground loop isolation for a genuinely quiet signal path.
• SLASH 5 — biggest trade-off: it is a stationary, corded unit. You need a power source and a wired amplifier, speaker, or car audio system to get anything out of it.
• Who each pick is for: Loop Switch 2 is for people who want control over the noise around them — commuters, festival-goers, focus workers. SLASH 5 is for people who want better sound out of the gear they already own.
The Loop Switch 2 is a passive earplug with a mechanical twist: a manual dial built into the body that cycles through three noise-reduction modes. Quiet Mode is the strongest setting, Engage Mode is tuned for conversation, and Experience Mode lets more high-frequency detail through so live music still sounds like live music. Loop rates the overall reduction at 20–26 dB SNR, which is a meaningful drop for loud environments without the muffled, underwater feeling cheaper foam plugs create.
Comfort is clearly the design priority here. Loop slimmed down the earplug body and used a smaller angled nozzle so it sits more naturally in the ear canal, and the Switch 2 ear tips now come in four sizes — XS, S, M, and L, with medium pre-installed. That sizing range matters more than it sounds: a good seal is what actually delivers the rated reduction, so getting the tip size right is the difference between "these work" and "these keep falling out." The kit also includes a carry case with moulded silicone inserts, which keeps the plugs clean and protected in a bag or pocket.
So who should buy it? Anyone who moves between loud and quiet environments in the same day — a commuter who wants to mute the train and still hear the platform announcement, a worker who needs to concentrate in an open office, someone heading to a festival who wants to protect their hearing without losing the music. Who should skip it? Anyone expecting to listen to audio through it. There is no battery, no electronics, and no Bluetooth — it is a hearing-protection tool, full stop. If you want headphones, this is the wrong product entirely.
The SLASH 5 is a Bluetooth-to-RCA audio receiver with an unusually serious spec sheet. At its core is the ESS ES9219 32-bit Quad DAC, which handles processing up to 32-bit/384kHz and is rated for a 130dB SNR — the kind of figure that translates to a genuinely black background between tracks rather than the faint hiss you get from budget receivers. On the wireless side it supports Sony LDAC at 24-bit/96kHz, plus aptX Adaptive and aptX HD, so modern iPhone and Android devices can stream high-resolution audio to it without cables.
Outputs are where it separates itself from a basic adapter. There is a high-voltage RCA output at 2.7Vrms for feeding a hi-fi amplifier or powered speakers, and a separate 3.5mm headphone jack at 1.0Vrms with a built-in headphone amp. In other words, it can drive both a stereo system and a pair of wired headphones from the same box. SLASH also built in ground loop isolation and a low-pass filter to kill electrical hum, and deliberately left out noise-inducing screens to keep the signal path as clean as possible — a design choice aimed squarely at home and studio setups where hum is the enemy.
The build is 100% designed and manufactured in South Korea, with high-purity copper RCA connectors, 24K gold plating, and a solid aluminum panel over a compact body measuring roughly 1.69" x 0.47" x 1.73". It is corded electric, powered over USB-C, and runs on simple push-button controls with no app or Wi-Fi setup — plug in, pair, play. Box contents include the unit, an RCA extension cable, a USB-C cable, and a manual.
Who should buy it? Anyone with a good amplifier, speaker set, car stereo, mixer, or console that sounds great but has no wireless input. It is also pitched at commercial spaces — cafes, offices — that need reliable 24/7 operation. Who should skip it? Anyone who wants portable listening on the move. This is a tabletop bridge between a phone and a wired system, not something you clip to your collar.
Side-by-Side: Which Should You Choose?
• Best for blocking noise around you → Loop Switch 2. 20–26 dB of passive reduction with three switchable levels and zero batteries.
• Best for upgrading an existing hi-fi system → SLASH 5. LDAC and aptX Adaptive streaming into RCA and 3.5mm outputs.
• Best for sound quality on wired speakers or headphones → SLASH 5. The ESS ES9219 Quad DAC and 130dB SNR rating put it in a different category of hardware.
• Best for commuting, festivals, and open offices → Loop Switch 2. It is built for exactly those environments.
• Best for a fixed home or studio setup → SLASH 5. Ground loop isolation, LPF, and 24/7 reliability suit permanent installations.
• Best for travel simplicity → Loop Switch 2. Pocket-sized with a protective case and nothing to charge.
• Best for connecting a phone to a car stereo or amplifier → SLASH 5. That is its core purpose.
These two products barely compete — they solve opposite problems, and the "aptX Adaptive headphones" angle actually points at the SLASH 5, because that codec lives on the SLASH 5's wireless side as a receiver rather than in a pair of headphones. If I had to pick one, I would buy the SLASH 5 for anyone whose real goal is better wireless audio into a wired system: the ESS ES9219 Quad DAC, LDAC and aptX Adaptive support, dual RCA and headphone outputs, and ground loop isolation make it a genuinely high-end bridge rather than a cheap dongle. But if your problem is the noise around you rather than the audio coming out of your speakers, the Loop Switch 2 is the honest answer — and no amount of DAC spec will help you there.
FAQ
No. The Loop Switch 2 is a passive earplug with a manual in-ear dial and no batteries or electronics, so there is nothing to charge. You switch between Quiet, Engage, and Experience modes by turning the dial. The SLASH 5, by contrast, is corded electric and powered over USB-C, so it stays plugged in while it works.
Yes. The SLASH 5 has two outputs: a high-voltage RCA output rated at 2.7Vrms for amplifiers and powered speakers, and a dedicated 3.5mm headphone jack rated at 1.0Vrms with a built-in headphone amp. That means one unit can feed a stereo system and a pair of wired headphones. Just note it is a tabletop device, not a portable player.
The Loop Switch 2, without question. It is designed for exactly that — 20–26 dB SNR of passive noise reduction, three switchable levels, and four ear tip sizes for a secure seal. The SLASH 5 does nothing for the noise around you; it is an audio receiver for a fixed hi-fi or studio setup. If you want to check current pricing on either before deciding, use the price button on this page.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Proof Labs 4 vs PEFUPEW Earbuds, PreSonus HP60 vs Mackie MC Series Professional, Generic Pink Gaming Headset vs Guiheng Gaming Headset, Elgin Ruckus Earplug Headphones vs Generic Earbuds