ACS Eclipse 500 In-Ear Monitors

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CHF 691Price Includes
VAT @ 8.1%

NEW LAUNCH

Estimated delivery: 27th - 30th June

5-year warranty & 30-day money back guarantee included if returned unused and sealed

You can purchase from Gear4music with complete confidence and peace of mind. All of our products are new unless stated and come with a 30-day money-back guarantee and a 5-year warranty as standard.

Once the product is delivered, you'll have 30 days to decide that you definitely want to keep it. If you decide it's not suitable, you can return it to us for an exchange or a refund, providing the product is unused and sealed in its original packaging.

We do everything we can to make sure the right item reaches you in perfect condition. If your order arrives damaged, or is incorrect, let us know within 14 days of receiving it and we'll arrange for a free collection.

If your goods develop a fault within the warranty period, we'll quickly repair or replace the item for you. If the fault occurs within the first 180 days of your ownership, we'll collect the goods and deliver them back to you free of charge.

We're unable to accept returns of any custom-made items designed to work together as a unique package. Some items are only eligible for the money-back guarantee if they are returned to us unused and sealed in the original packaging.

For full information on our returns policy, please refer to our returns and refunds information page.

If you decide your order isn't suitable for any reason you can return it - just let us know within 30 days of receiving it. Please keep hold of all the original packaging until you're sure you want to keep the order.

Eligibility for Money Back Guarantee

Important: For hygiene and software licensing reasons, some items are only eligible for our Money Back Guarantee if they are returned to us unused and sealed in the original packaging with all software still "unregistered." Details of exclusions are shown within the product descriptions. Products include:
- Monitors and Headphones
- Earplugs and Ear Protection
- Reeds and mouthpieces for woodwind and brass instruments
- Mouth and Lip-Care Products
- CDs, DVDs and Software

We can collect your return for a small fee, or you can send it back to us yourself. The collection fee can be found in the returns information on each product's page on Gear4music.

In the unlikely event that any item in this order is faulty, damaged or incorrect on receipt, notify us within 14 days and we'll arrange a free collection.

When returning an order please ensure products are appropriately packaged and protected, to prevent them from getting damaged.

Summary of returns policies and timescales

This table provides an overview of your statutory consumer rights, compared with our standard returns policy and optional extended money back guarantee and warranty.

UK & Europe	EU Standard	Gear4music Standard	Gear4music Optional
Return Period	14 days	30 days	up to 180 days
Standard delivery charges refunded?	Yes	Yes	Yes, up to 30 days
Upgraded delivery charges refunded?	Standard costs only	Standard costs only	Standard costs only
Free collection on cancellation	No	No	Yes, up to 30 days
Free collection if defective, delivered damaged or incorrect item	Yes, within 14 days	Yes, within 14 days	Yes, within 30 days

We are unable to accept returns of any custom made items designed to work together as a unique package and some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging. For full information on our returns policy, please refer to our returns and refunds information guide.

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Key Features

Spacious sound with hybrid driver configuration
Provides natural isolation with ACS ambient filter
Hi-Res Audio certified clarity and detail
Interchangeable nozzles for personalised fit
Built in the UK with premium metal housing

ACS Eclipse 500 In-Ear Monitors Overview

View this description in German

The ACS Eclipse 500 is designed for musicians, engineers and audio lovers who need accurate sound, lasting comfort and long-term reliability. It uses a powerful 8mm dynamic driver for rich, controlled bass, along with dual balanced armature drivers for clean midrange and a dedicated super tweeter for high-end clarity. These drivers are combined through a passive 3-way crossover to maintain separation, allowing each frequency range to shine without overcrowding the soundstage.

ACS has integrated its 17dB ambient filter to reduce the pressure build-up often felt with in-ear monitors. This helps air pass naturally in and out of the ear canal, creating a more open and relaxed sound while still offering effective isolation. The result is a more comfortable and immersive experience for longer listening sessions. A choice of CNC-machined nozzles in different lengths lets you tailor the fit and sound to your preference, and the included foam tips in multiple sizes add further comfort and seal options.

The aluminium housings are tough but lightweight and feature interchangeable faceplates for added style and durability. The cable is built from high-purity oxygen-free copper, silver-plated for low capacitance, and designed to minimise signal loss across its full length.

Product Ref: 338538

Full Description

View Full Description

Balanced hybrid drivers for immersive sound

The Eclipse 500 uses a hybrid configuration that blends the character of dynamic and balanced armature drivers. A single 8mm dynamic driver handles the low frequencies, producing warmth and punch without becoming bloated. Two mid-high balanced armatures preserve the detail and presence in vocals and instruments.

A separate Knowles super tweeter pushes the high-end response to the Hi-Res Audio threshold, adding sparkle and air to the top end. These are controlled through a passive 3-way crossover, ensuring each driver performs in its ideal range with no overlap or interference. This combination creates a wide, spacious soundstage with clear separation and accuracy.

Natural isolation that improves comfort

Many in-ear monitors block external sound by sealing the ear completely, which can lead to discomfort and pressure build-up over time. The Eclipse 500 solves this with ACS’s passive ambient filter, which allows 17dB of isolation while maintaining airflow in and out of the ear canal. This makes the listening experience feel more open and natural, while still protecting your ears in louder environments. It also reduces fatigue during long sessions, making it suitable for both live performances and extended listening at home or on the move.

Personalised fit with adjustable components

The Eclipse 500 comes with interchangeable sound output nozzles in standard, short and extended lengths. Each option allows small changes to how the sound reaches your ear, which can help you fine-tune the fit and acoustic response.

The stainless steel nozzles are CNC-machined for precision and durability. If you need a more tailored solution, ACS also offers a custom-fit sleeve to pair with a custom nozzle, available as an additional purchase. Foam ear tips in three sizes are included to provide a comfortable seal and help maximise isolation straight out of the box.

Premium construction for daily use

Designed and manufactured in the UK, the Eclipse 500 uses a die-cast aluminium shell finished in black anodising for strength and a sleek appearance. Interchangeable stainless steel faceplates give an added touch of customisation. The cable features a 2-pin design and is made from high-purity oxygen-free copper with a silver-plated finish. It is continuous from the 3.5mm jack to the connectors, reducing weak points and preserving signal quality. This robust design makes the Eclipse 500 a strong performer across different settings, from studio monitoring to on-stage use or casual listening at home.

Features

Exclusive soundstage imaging delivers a wide, immersive audio environment
ACS Ambient Filter Technology provides natural passive isolation with reduced ear fatigue
Certified Hi-Res Audio performance ensures extended high-frequency clarity
Crafted and engineered in the UK for consistent build quality and tuning
Three-driver hybrid system combines an 8mm dynamic driver for bass, dual balanced armatures for mids and highs, and a super tweeter for ultra-high detail
Passive 3-way crossover with acoustically tuned internal pathways for seamless frequency integration
17dB passive ambient filter maintains sound clarity while preventing the “plugged ear” sensation
Replaceable 2-pin (0.78mm) connectors with a high-purity silver-plated copper cable for superior signal integrity
Durable die-cast aluminum housing with interchangeable stainless steel nozzles and faceplates
Nozzle options include Standard, Short, Extended, and Custom (for optional custom-fit sleeves)
Includes foam ear tips in three sizes, leather case with carabiner, and a 3.5mm to ¼" step-up adapter
Frequency response from 10Hz to 24kHz, impedance of 28 Ohms, and sensitivity of 108dB at 1kHz
Perfect for musicians and audiophiles seeking long-session comfort with high-fidelity sound

Specifications

Freq. Response: 10Hz - 24kHz
Impedance: 28 Ohms @ 1kHz
Sensitivity: 108dB @ 1kHz
Driver Configuration: Single Dynamic Bass Driver, Dual Knowles Midrange-Treble Balanced Armature, Single Knowles Super Tweeter Balanced Armature
Crossover & Tuning: Passive 3-Way Crossover
Sound Path Construction: Acoustically Tuned
Operating Temperature: 0°C To 45°C (32°F To 113°F)
Isolation: ACS Passive Ambient Filter (17dB)
Connection: Replaceable 2-Pin (0.78mm)
Cable: 2-Pin Twisted, High Purity Oxygen Free Copper Silver Plated, Continuous Construction From 3.5mm Connector To 2-Pin Connector, Low Capacitance
Housing: Die-Cast Aluminium Black Anodised Finish, Threaded Stainless Steel Interchangeable Sound Output Nozzles, Interchangeable Metal Faceplates
Sound Output Nozzles: CNC-Machined Stainless Steel, Standard, Short, Extended And *Custom
*Custom Note: Custom Nozzle Is Supplied With The Custom Fit Sleeves. Custom Fit Sleeves Are An Additional Purchase.
Product Code: ACS001