64 Audio U18s Universal IEM Earphones
Usage Guide
Earphones
Our Hi-Fi specialists give free, honest advice — no commission, ever. Contact us by email or phone and we'll help you find the right cable for your system.
Item code: P002477
Inc. VAT (20%) · Ex. VAT: £2,332.50 Ex. VAT · Inc. VAT (20%):
Lowest price in the last 30 days:
Request to Price Match
If you've seen a better offer for this product, we will endeavour to match it. The competing offer must be on brand-new boxed items, and in stock from another UK Online Authorised Retailer (excluding marketplaces). Price match quotations are valid for 7 days.
SPEAKER CABLES:
A quantity of 2 means you will receive a pair of speaker cables e.g. for your front left and front right speakers. By entering a quantity of 1, you will get a cable for a single speaker e.g. centre speaker and this option also enables you to vary the length (and termination) of your cable for each speaker.
OTHER CABLES:
A quantity of 1 means you will receive a single cable in the case of aerial, satellite, subwoofer, digital coaxial & optical cables and a pair of cables in the case of 2 rca to 2 rca analogue audio cables.
NON-CABLE PRODUCTS:
A quantity of 1 means you will receive 1 of the specified products.
Order before 4pm (Mon–Fri) for same-day dispatch
64 Audio U18s Universal IEM Earphones
The 64 Audio U18s Universal IEM Earphones represent a groundbreaking advancement in audio technology, building upon the legacy of the world-renowned U18t model to deliver an unparalleled listening experience. With its proprietary drivers, innovative LID technology, and electronic crossover network, the U18s sets a new standard for clarity, resolution, and vibrancy in sound reproduction.
Crafted in the USA from aerospace-grade aluminium billet, the U18s boasts a striking fractal design inspired by the beauty of nature itself. CNC-milled, sandblasted, and anodised twice, each earphone is meticulously crafted to ensure both aesthetic appeal and exceptional durability.
At the heart of the U18s is 64 Audio's patented Tubeless In-Ear Audio (tia) technology, which aims to minimise unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system incorporates open balanced armature drivers, a single-bore design, and acoustic chambers to achieve unparalleled sonic purity.
Additionally, the U18s features Air Pressure Exchange (Apex) technology, a patented vent system that releases air pressure in the ear canal while maintaining standard levels of isolation. This venting alleviates listener fatigue and enhances the realism of the soundstage, allowing for extended listening sessions without discomfort.
The Linear Impedance Design (LID) circuitry ensures consistent and reliable sound performance across a range of source devices, correcting non-linear electrical resistance to preserve the desired sound signature.
Sound
Listening to U18s gives the sense that a filter has been lifted off of your music; it is suddenly more direct and vibrant. Resolution and presentation that reveals details which have previously gone unnoticed. The space between you and the performance is removed; the difference between hearing the best reproduction and experiencing it being played in real-time. The enveloping sound-stage and wide frequency response allows you to really press into the music without fear of harshness or fatigue.
Featured Technology
Tubeless In-Ear Audio (tia) is a patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system is comprised of three major elements: open balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers. U18s features two major elements of the tia system: the tia driver and the tia single-bore design.
Air Pressure Exchange (Apex) is a patented vent that releases air pressure in a sealed ear canal all while retaining standard IEM levels of isolation; enabling musicians and music enthusiasts to listen more comfortably for longer. This venting alleviates listener fatigue and allows for a much more realistic soundstage. Apex comes in three module variations for U18s: mX, m15 and m20
Linear Impedance Design (LID) is a patented circuit that corrects the non-linear electrical resistance of the multiple driver-sets comprising this 18 driver IEM. Varying source amplifier output impedance in devices like smartphones, body packs, DAC/amps, and DAPs typically results in varying frequency response across them, depending on the increase in resistance. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent reliable sound.
A crossover circuit replacing traditional acoustic dampers which can introduce unwanted distortion through vibration and air turbulence. Rather than using acoustic dampers to filter unwanted frequencies after the driver produces them the electrical low pass filter lowers distortion by eliminating unwanted frequencies before they reach the driver.
Specification
- 1 tia High Driver – 1 High-Mid Driver – 8 Mid Drivers – 8 Low Drivers
- 10hz – 20kHz Frequency Response
- 106 dB/mW Sensitivity @1kHz @ 1mW (84mV)
- Integrated 4-way Passive Crossover
- 8Ω Nominal Impedance
- Apex Technology Isolation: -20dB, -15dB, -10dB
8-Braid Silver Cable
- 8 Conductors
- 0.28 Ohms Total Impedance
- Pure Silver Plated Oxygen-Free Copper Wire
- 65 Strands of 44 AWG Wire
- Low Microphonics
Included
- U18s Universal in-Ear Monitors
- 64 Audio Premium Leather Case
- TrueFidelity Foam Ear Tips (S,M,L)
- SpinFit Silicone Ear Tips (S,M,L)
- Silicone Ear Tips (S,M,L)
- 3.5mm 8-Braid Silver Cable
- Apex Modules: m20, m15, mX
- Round Sticker
About 64 Audio
64 Audio is a family-driven company, comprising individuals who are mothers, fathers, sisters, brothers, musicians, and friends. With experiences spanning across oceans, career changes, and personal growth, they have remained united by the bonds of family and shared values. From sacrificing meals to pursuing entrepreneurial ventures, their journey has been defined by resilience and a commitment to those around them.
Their belief in the power of music to break down barriers drives their mission to redefine the world's connection with sound. By offering products that deliver music in its purest form, they aim to inspire both musicians and music enthusiasts to forge deeper connections with the music they love. Founded by Vitaliy Belonozhko, whose background as a sound engineer sparked the inception of 64 Audio, the company has evolved into a leading innovator in the in-ear monitor industry. With a dedicated team and a passion for excellence, 64 Audio continues to push the boundaries of audio technology.
About 64 Audio
Maker of custom and universal in-ear monitors, known for its tia drivers and Apex air pressure venting.
64 Audio makes in-ear monitors in two formats: universal-fit models you can use straight away, and custom models built to the shape of your ears. The company is American, and its catalogue runs from more accessible universals up to multi-driver flagships. You can choose by budget, fit preference and the way you listen.
Read more about 64 AudioShow less
The tia design uses an open driver layout
tia stands for Tubeless In-Ear Audio. 64 Audio says the design pairs open balanced armature drivers with a single large bore and tuned chambers, aimed at a wider soundstage and a smooth response. Not every model uses it, so check the product page for the one you are considering.
Apex vents pressure and sets isolation
Apex stands for air pressure exchange. 64 Audio says the vent relieves pressure in the ear canal to reduce listening fatigue. Replaceable isolation modules let you choose how much outside noise reaches you: the m20 module cuts 20dB, the m15 cuts 15dB and the mX cuts 10dB.
Custom and universal ranges sit side by side
The catalogue is divided into universal and custom ranges. Custom models are made from a digital scan of your ear and a 3D-printed shell, a process 64 Audio calls 3D-Fit. The company also names LID, short for linear impedance design, as a technology used across its multi-driver models.
Specification
- 1 tia High Driver – 1 High-Mid Driver – 8 Mid Drivers – 8 Low Drivers
- 10hz – 20kHz Frequency Response
- 106 dB/mW Sensitivity @1kHz @ 1mW (84mV)
- Integrated 4-way Passive Crossover
- 8Ω Nominal Impedance
- Apex Technology Isolation: -20dB, -15dB, -10dB
8-Braid Silver Cable
- 8 Conductors
- 0.28 Ohms Total Impedance
- Pure Silver Plated Oxygen-Free Copper Wire
- 65 Strands of 44 AWG Wire
- Low Microphonics
We use Royal Mail 1st Class services for our Standard Delivery.
Orders received before 4.30 pm Monday to Friday are usually dispatched the same day by FIRST CLASS post (unless premium postal or timed courier services are selected), subject to stock availability. This does not apply to custom-length cables and speaker cables as these require a longer timescale to terminate. This also excludes all cables selected for the burn-in service. Please note, we do not process orders on national holidays in the UK. Over 98% of our orders are delivered the next working day including Saturdays.
Standard delivery is usually within 2 working days, although 98% of all orders are delivered the next working day including Saturdays. In extreme cases, such as delivery to the Highlands and Islands, this may take 3 days.
All items are fully insured and come with an invoice from Future Shop. We use the Royal Mail for delivery of small packages and DPD Local or DHL for items that weigh over 2KG. Items over 2KG are fully insured and will usually be delivered within 48 hours of placing your order subject to stock availability. For international orders, we use FedEx or DHL services where customers have selected this option.








Please note, special orders for non-standard cable lengths may be subject to longer deliver time-scales. This may vary from manufacturer to manufacturer.
We offer 'Free delivery on orders over £99' subject to the following terms & conditions:
- Applies only to orders with £99 or more of items (including VAT at the UK rate), at Future Shop
- Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK (excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL).
- Applies only to deliveries to addresses within mainland UK and Northern Ireland addresses. Applies only to orders that are to be delivered to a single Mainland UK delivery address.
- You will not be eligible for free delivery on your order if any items are cancelled or returned for a refund, bringing the total order amount below £99. Where items are returned, the refund due will be the cost of the item less any postage costs.
- We reserve the right to change or discontinue 'Free delivery on orders over £99 promotion at any time.
- FREE DELIVERY FOR ORDERS OVER £99 OFFER DOES NOT APPLY TO TRADE CUSTOMERS.
UK Postal & Delivery Charges - FIRST CLASS
Free UK delivery on all orders over £99*
| Weight | Price (FIRST CLASS UK POSTAGE) |
| 0g - 1000g | £3.95 |
| 1000g - 1400g | £4.95 |
| 1400g - 1800g | £5.95 |
| 1800g - 2000g | £6.95 |
| 2000g - 3000g | £8.95 |
* Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK.
Free Delivery for orders over £99 excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL.
Special Delivery UK - Guaranteed Next Working Day
We have 99.9% of the UK covered With Royal Mail Next Day Special Delivery. We guarantee delivery to most UK addresses by 1pm the next working day. This includes Northern Ireland, Jersey and Guernsey. Some places take longer to deliver to but we still guarantee delivery within three working days by 5.30 PM.
Please note, Royal Mail Special Delivery for next working day may not be possible where non-standard cable lengths are ordered. If this is the case, the item will be shipped via The Royal Mail Special Delivery service as soon as the cable is custom made.
For orders weighing over 2KG, we reserve the right to ship items using Next Day Pre-Noon Courier Services where Royal Mail Special Delivery option has been selected.
Channel Islands & Northern Ireland
We accept orders from all Channel Islands including Alderney, Jersey, Guernsey and Sark. Unless you select a premium service, Items weighing under 2KG are delivered using our standard UK delivery option above. For items weighing over 2KG, a surcharge may be applied for all deliveries to the Channel Islands as well as Northern Ireland.
European Countries
Deliveries to EU member states are not subject to 20% VAT after December 31st 2020 and therefore the 20% VAT on items is automatically deducted when you log-in, register or proceed to place an order.
The customer will be liable for the VAT at the local VAT rate, duty on the import and the brokerage service fee if applicable. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.
We offer the following shipping services:
- Royal Mail First Class International Airmail Services - Items are usually delivered within 3 to 5 working days
- Royal Mail Standard International Mail Services - Items are usually delivered within 7-10 working days
- DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
- Federal Express International Priority - Items are usually delivered within 24 to 48 hours. FedEx orders must be received by 3.00pm for next day service to most destinations in Europe
- Federal Express International Economy - Item are usually delivered within 48 to 72 hours
We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.
Worldwide - Excluding UK & Europe
Deliveries outside of the UK are not subject to 20% VAT and so the 20% tax on items is automatically deducted when you log-in, register or proceed to place an order.
If applicable, the customer will be liable for the taxes at the local tax rate, duty on the import and the brokerage service fee. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.
We offer the following shipping services:
- Royal Mail First Class International Airmail Services - Items are usually delivered within 7 to 10 working days
- Royal Mail Standard International Mail Services - Items are usually delivered within 15 working days
- DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
- Federal Express International Priority - Items are usually delivered within 48 hours. FedEx orders must be received by 3.00pm in order to ship items the same day, subject to stock availability
- Where the actual weight of the package significantly exceeds the shipping cost charged on orders, we may write to you for an additional shipping charge. For larger orders, items may be shipped in multiple packets at our discretion
We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.