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7Hz was founded in 2018 as a team of engineers and audio enthusiasts who came together to test their skills in the realm of audio. By focusing on quality drivers and using precise circuitry design, 7Hz aims to deliver the most efficient setups that best shine the drivers’ natural abilities. 7Hz stands for the Theta Wave, a frequency that is often associated with meditation and harmony. All of 7Hz products reflect this ideal by taking you into a pure musical trance.
The 7Hz i99 combines the best of the modern dynamic driver technologies - the fast diaphragm response of beryllium and the crystal clear smooth sound of diamond-like carbon. Unlike most common Be diaphragms which are commonly spray coated, the i99 has electroplated Be unto the DLC driver, leading to a more effective display of beryllium’s true characteristics, and ultimately translating to a longer-lasting and purer sound. This innovative technique leads to a much faster diaphragm that better articulates details, and leads to a more powerful and impactful bass. The driver design further extends the dynamic range, causing the sound to be fuller and more comprehensive at every frequency.
The 7Hz i99 housing reflects the beauty and elegance of diamond. Made of a single piece of meticulously carved stainless steel, the i99 is designed to be both durable, as well as increase the sonic focus of the sound by eliminating unwanted resonance. The i99 has been hand polished to shine brilliantly at every angle and is unlike any other earphone in the world. It simply is a stunning piece of jewelry that also sounds like sparkling crystals.
The 7Hz i99 comes with a hand-stitched leather case. With 9 different types of premium eartips, you can find the fit that is most comfortable and best sounding for you. The MMCX silver-plated OFC copper cable was made with newly designed connectors that are longer lasting and more durable than traditional MMCX connectors used in traditional earphones.
Linsoul Audio is the authorized distributor. All products are authentic and genuine.
We are located in china but send our products worldwide for free.
We provide 1 year warranty for the all products except the cables*.
We reply to all support inquiries within 3 working days.
This is one of the best headphones I’ve tried in a while, for a single driver it definitely sounds like a titan, 13.9mm ain’t joking, soundstage it’s not wide, but the depth it’s magnificent
Bass it’s detailed and blunt but not in a way that covers the whole spectrum, it actually has an amazing position, mids are quite something... I’m listening to it while writing this, I’m in awe with this pair. For the price is a bargain
If everything goes right our system will automatically generate your order and send you a confirmation email. If you don't receive the confirmation email please double-check that it wasn't automatically stored in your spam or promotions folder.
Most of the items you see are in stock and ready to be shipped after 3 working days. If you plan to order a custom (Design or Fit) product, a pre-order, or a made to order item processing times may change on item to item basis.
Standard shipping is offered free worldwide for orders under $199 USD (with some exceptions), but please consider that delivery times may vary considerably depending on your country, up to 90 Days.
All items over $200 include free express shipping (DHL or similar). If your order total is under $200 you can manually add Express Shipping during the checkout period for $15.00 USD
We are generally able to ship to most countries via DHL Express, and many countries via Standard Shipping. You may clarify with our team to see whether Standard Shipping is available to your country.
*Note: We can only do Standard Shipping for the UK, India and Russia. We can only do Express Shipping to Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few.
We have two shipping methods - Standard Shipping and Express Shipping.
Standard Shipping is free for most countries, while Express Shipping via DHL Express is 10-35USD depending on your country. If your order is over 200USD, DHL Express Shipping is free*.
*For some countries, DHL Express is only free for orders above $239USD. Large items such as headphones (e.g. HarmonicDyne Zeus, Gold Planar GL2000, and etc.) are exceptions as well.
Shipping fees exclude import taxes or processing fees that might be applicable for your country. Linsoul is not responsible for any form of such fees.
For in-stock products, your order will be shipped within 3 working days. You may check with our staff regarding the in-stock status of any products.
Customized items will take a longer time. Please contact our staff for more information.
On normal non-sale days, once your parcel has been shipped out:
*Note: Timings might be affected due to festive seasons or other unforeseen circumstances
Customers have to bear any form of custom/import/processing fees that are applicable for your parcel.
Should you be unwilling to pay for the fees and reject the delivery of the parcel, you will still have to pay for the shipping cost. Linsoul will only refund the amount of your order after deducting the shipping cost incurred.
For faulty/missing items, please send an email to email@example.com to process warranty. In your email, please choose an appropriate Subject Title. Kindly include your Order Number, and state your issue clearly. Please also attach photographs/videos as “proof”, if any. Our team aims to review your email within 3 working days.
For other queries, the fastest way to contact us is via our website or Discord
Please kindly check the following guide first: CIEM Ordering Guide
After placing an order, you will receive the order confirmation email. After your order has been shipped out, you will also receive a tracking email. You can track your order via the tracking number online. Should you not have received the emails or face any difficulties tracking your order, please kindly contact us for support.
We collaborate with these courier companies:
Standard Shipping: 4PX, UBI, NinjaVan, and Yun Express
Express Shipping: DHL Express and SF Express