DDHiFi E13P Memory 4.4
High-Efficiency Planar Magnetic In-Ear Earphones
ForCritical listening
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Overview
The details behind DDHiFi E13P Memory 4.4.
High-Efficiency Planar Magnetic Driver
The Memory 4.4 features a custom 13mm ultra-linear planar magnetic driver co-developed with MOONDROP. Its dual-suspension ring-type magnetic circuit with a four-magnet array delivers 4× the transduction efficiency of equivalent dynamic drivers and 10× that of conventional 14.5mm planar units. The result is a compact driver capable of deep bass, transparent clarity, and low distortion even during large dynamic swings, all easily driven from lowpower sources.
Two Distinctive Chassis, One Acoustic Intent
Memory 4.4 comes in two chassis variants. The Memory Pd4.4 uses pure copper shells with a palladium-plated finish for superior passive noise isolation and a more substantial in-ear feel. The Memory AL4.4 features AL6063 aviation aluminum CNC-formed shells for an exceptionally lightweight build. Both versions share identical dimensions, driver configuration, and connector architecture, offering a simple choice based on material and wearing preference without any difference in acoustic design.
Retuned for Pure 4.4mm Playback
Distinct from the USB-decoding Memory variant, the Memory 4.4 receives a full acoustic retuning of the front and rear cavities. The positioning and area of the vents have been redesigned to optimize performance when driven directly from high-quality 4.4mm balanced sources. This dedicated architecture ensures a purer signal path and broader source compatibility, focusing entirely on the faithful reproduction of HiFi music in a native balanced connection.
Purpose-Built Cable and Connectivity
The earphone is terminated with a fixed 4.4mm balanced plug and a custom shielded cable selected to match each chassis variant. The Memory Pd4.4 is equipped with a black-mesh-sheathed 6N OCC conductor, while the Memory AL4.4 features a grey-mesh-sheathed 5N OCC conductor. Both cables are designed for stable signal transmission and low microphonics, complementing the compact, low-profile aesthetic of the earpieces.
Lightweight Comfort, Classic Silhouette
With an emphasis on long-session wearability, the Memory 4.4 pairs its slim, compact alloy shells with a carefully contoured shape that sits securely in the ear. The Pd4.4 version weighs approximately 31g, with the AL4.4 version weighing approximately 25g, both measuring 120cm in cable length. Their light overall footprint makes them easy to wear and carry, embodying the design goal of delivering high-fidelity planar sound without bulk.
Retro Case and Comprehensive Accessories
A custom retro-inspired storage case is included as standard, its dimensions comparable to a classic cassette player. Wrapped in microfiber leather with YKK zippers, the interior features separate compartments for left and right earpieces, preventing contact and wear during transport. The package also includes a selection of KIWIFLEX ear tips (S/M/L) from KIWIEARS for a personalized, secure seal.
Technical details
- Driver configuration
- Single Driver
- Driver technology
- Planar
- Product Name
- DDHiFi E13P Memory 4.4
- Driver
- 13mm planar magnetic unit
- Headphone Plug
- 4.4mm balanced
- Effective Frequency Response
- 20Hz–20kHz
- Impedance
- 16Ω±15% (@1kHz)
- Sensitivity
- 121dB/Vrms (@1kHz)
- Total Harmonic Distortion
- ≤0.1% (@1kHz)
- Cable Length
- 120cm
- Chassis Material
- Pure copper, palladium-plated（Pd4.4）/AL6063 aviation aluminum, CNC formed（AL4.4）
- Cable
- Black-mesh-sheathed 6N OCC（Pd4.4）/Grey-mesh-sheathed 5N OCC（AL4.4）
- Weight
- Approx. 31g（Pd4.4）/Approx. 25g（AL4.4）
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Your order
Which countries do you ship to?
We are generally able to ship to most countries via Express Shipping, and many countries via Standard Shipping. You may clarify this with our team to check whether Standard Shipping is available to your country.
We cannot ship to addresses that are "PO boxes or APO/FPO".
*Note: Generally, we can only do Selected Shipping to India and Russia. We can only do Express Shipping to Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few.
This may be subjected to changes due to unpredictable issues such as Covid, war, and etc.
How much does shipping cost?
We have two shipping methods - Standard Shipping and Express Shipping.
Standard Shipping is free for most countries, while Express Shipping is 15-35USD depending on your country. If your order is over 270USD, Express Shipping is free*.
*This applies for most countries. However, large items such as headphones and desktop DAC/AMPs (e.g. HarmonicDyne G200, MUSICIAN MDP-2, and etc.) are excluded.
Shipping fees exclude import taxes or processing fees that may be applicable for your country. Linsoul is not responsible for such fees. Should you refuse to pay the tax/customs fees, shipping fees will still be deducted from the amount paid for thetwo-way freightcharges. The cost of the freight charges may be more than the amount reflected on your order due to tax and other miscellaneous fees.
Some parcels claimed to be “returned to the seller” may be destroyed by the post office or customs officers when buyers refuse to accept their parcels or fail to pay for their taxes.No refundwill be processed for such cases.Standard Shipping via YunExpress is a tax-inclusive option for some countries. However, Linsoul will not be responsible for additional administrative or handling fees charged by your local courier company or customs. Please kindly check this with your local customs.For certain remote areas, there may be additional charges via Express Shipping. We will contact you if there is a need to make additional payments. Please contact us before placing an order, should you have any queries regarding shipping.
How long does it take to receive the order after it is placed?
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:
- For Standard Shipping, it takes about 2-4 weeks for items to be delivered after shipping out. For some countries, it might take up to 2-3 months, depending on your country, its customs and other factors.* The duration for transit is something beyond our control. Linsoul will not be making refunds for such cases. Please consider an upgrade to Express Shipping or keep the waiting time in mind.
- For Express Shipping, it takes about 3-7 days for items to be delivered after shipping out.
*Note: Timings might be affected due to festive seasons or other unforeseen circumstances
What happens if the parcel has been shipped but not delivered?
First, kindly contact your local courier using the local tracking number.
If your parcel were to be in transit for at least 3 months, it may have been lost in transit.
For orders below $50USD, you may either opt for a one-time reshipment of parcel OR a full refund of the amount paid in cash via PayPal/Credit/Debit card.
For orders above $50USD, we will only process a 50% refund of your order paid in cash via PayPal/Credit/Debit card. Should there be any concern about Standard Shipping, you are encouraged to opt for DHL Express Shipping instead.
Customers are to bear the consequences and fees incurred, if the parcel was undelivered due to any of the following situation:
- Wrong address or phone number provided by recipient
- Recipient was uncontactable when courier company contacted
- Refusal to sign for the package by recipient
- Lost or damaged parcel because recipient opted for “no-signature delivery”
- Refusal to pay for the local tax/processing fee by recipient
- Refusal to provide supporting documents for custom clearance by recipient
Who will pay for the import tax/custom fees
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 two-way shipping fees incurred.
What shipping companies do you use?
We collaborate with these courier companies:
- Standard Shipping: 4PX, UBI, NinjaVan, and Yun Express
- Express Shipping: DHL Express, FedEx and SF Express
How do I get help for my order?
Cancellation or/and modification of orders can only be done manually via our staff, provided that our Warehouse Team has not processed your order.
As our Support Team might not be available during non-working days and weekends, please place your order wisely.
Should you really need to cancel or/and modify your order after purchase, please contact us via our support email (Support@Linsoul.com) or website chat. We will help you with the changes if that could be done.
In general, upon receiving your parcel, please confirm the contents of the package and ensure that the package is in good condition before signing for it. All customers are strongly advised to take an unboxing video of their parcel and packaging when opening their parcels and products.
For faulty/missing items, please send an email to support@Linsoul.com for after-sale services. The following details are required.
- Send an email to support@Linsoul.com with an appropriate Subject Title
- Provide your order number and state the issue clearly
- Attach photos and videos to show that your product is faulty/missing. Shipping details on the parcel packaging have to be clearly visible.
If the photos/videos provided are insufficient to prove the stated issue, we will enquire more. Once the issue has been confirmed, we will arrange for a replacement, partial refund or a full refund (where applicable). For incorrect products, Linsoul reserves all rights in deciding whether you need to return the incorrect item or not. Please kindly contact us via email first. 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
Linsoul Audio will not be responsible for parcels that have been damaged during the transit process.
Do I get tracking details for my order?
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.
For more than 1 orders placed under the same account and shipping address, Linsoul will automatically combine the orders and ship them out via one tracking number. Should you have special requests to have the orders shipped separately, please kindly contact us via Discord or our website's chat. We will do our best to help.
How do I cancel my order?
Cancellation or/and modification of orders can only be done manually via our staff, provided that our Warehouse Team has not processed your order. Orders that have been shipped cannot be cancelled and modified.
As our Support Team may not be available during non-working days and weekends, please place your order wisely as support cannot be guaranteed for such requests.
Should you really need to cancel or/and modify your order after purchase, please contact us via our support email (support@Linsoul.com) or website chat. We will help you with the changes if that could be done.
Can I return an opened item?
Request a return within 30 days of delivery while the product is factory-sealed. Contact support for instructions before returning anything.
Where should I send the product for the return process?
To initiate the return shipment, kindly send an email to support@Linsoul.com within 30 days upon receiving the sealed product(s). The RMA form and details will be provided to you via email.
When must the product be returned after receiving the RMA form and details?
After receiving the return instructions from us via email, kindly arrange the return shipment of the parcel within 5 working days, and update us with the tracking link via email again. Failure to do so will result in a cancellation of the return process.
When will I receive my refund after returning the product?
In most cases, after receiving and inspecting the returned product, your refund will be processed within 5 business days. Refunds may incur a currency exchange loss or transaction fee, depending on your source of payment (e.g. Bank or PayPal). Linsoul will not be responsible for such fees.
What warranty applies?
Most products come with a 1-year warranty; cables and accessories have shorter or separate terms.
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