ER-4S Conversion Cable Included: ER-4P Measured Matched Pair, Purchase Details, Maintained
110.88 USD(tax included)
／199.58 USD (Excluding tax)
Sales unit: 1 piece
Application number: / Manufacturer: / Model number: m75355557553 / JAN code: / AS ONE / NAVIS Product number:
| Application number | |
|---|---|
| Manufacturer | |
| Model number | m75355557553 |
| JAN code | |
| Sales unit | 1 piece |
| Price | 110.88 USD (tax included) / 199.58 USD (Excluding tax) |
*Additional shipping fees will be charged for this product in Okinawa Prefecture, remote islands, some other areas, and mountain areas. Please note that we may not be able to deliver depending on the region. If we are unable to deliver your order after placing your order, Askul will contact you.
Please note the following points as this item is directly shipped.
- Additional shipping fees will be charged for this product in Okinawa Prefecture, remote islands, some other areas, and mountain areas. Please note that we may not be able to deliver depending on the region. If we are unable to deliver your order after placing your order, Askul will contact you.
- This product may not come with a delivery note issued by Askul. Customers who wish to receive a delivery note issued by Askul can print it out as a PDF file from the usage history on this site after receiving the product.
- It is not delivered in Askul cardboard or a bag.
- We cannot accept changes, cancellations, returns, or exchanges after the order has been placed due to the customer's convenience.
- If we discover after placing an order that the product cannot be delivered, we may cancel your order.
- If it becomes clear after placing your order that the item is temporarily out of stock, it will be delivered as soon as it becomes available.
This image is a representative image. Please check the specifications for details.
Stock: Slightly
Direct delivery product
Shipping charges for products from this shipping source will be borne by us.
58 USD (tax included)
/ 63.8 USD (Excluding tax)
Product details
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| Product features | Category Earphone Brand Etymotic Research Condition No noticeable scratches or marks Shipping Included in price (by seller) From Unspecified |
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| Manufacturer name | - | Brand name | - |
| remarks | [About returns] We cannot accept returns due to customer's convenience. | ||
| Product details |
Added Actual Measurement Images - Price Reduced from Humidity-Controlled Cabinet Organization [Unit Overview] This is the renowned ER-4P from Etymotic Research. This unit has been modified by Mamepyoi Kobo with practical physical reinforcement and a custom adapter for 4S conversion, allowing for dual-use enjoyment. [About Serial Numbers] This is a genuine domestic product purchased new from Sound House in 2012. Purchase receipt included. Actual measurements show both left and right channels around 27-28Ω, with needle movements perfectly overlapping. Serial numbers: 253304 / 253300 Although the last digit differs by one, this is a matched pair from the正規パッケージ (official packaging). When creating a niko-ichi (two-into-one) unit, finding one with only a single digit difference is considered difficult. [Measurement, Maintenance, and Customization Details] 4S Conversion Adapter: A conversion cable with a built-in 68Ω resistor is included. Both left and right channels measure around 107-110Ω, matching to a degree where visual deviation is imperceptible, a testament to the precision of the work. The excess 12Ω is the sum of the cable's wiring resistance, contact resistance (plug/jack), and the resistance of the tester leads. Considering the tolerance of the 1608 chip resistors themselves (±1%, etc.), this slight upward deviation is due to the physical thickness of the contacts. Sound Quality Impact: With the ER-4S impedance of 100Ω becoming 107Ω, the output level only slightly decreases. In fact, the increased resistance alters the damping factor, further emphasizing the ER-4S's characteristic cold and precise control. Impedances exceeding 100Ω are within the acceptable range for the intended design of the 4S conversion. Even genuine 4S models have variations of 100-105Ω due to individual differences. A reading of 107Ω actually serves as evidence of thorough noise reduction and emphasis on control, enhancing the practical value of the unit. Double Protection Rigging: The weak point at the base of the 2-pin connector has been double repaired and reinforced with heat-shrink tubing containing adhesive. This ensures rigidity capable of withstanding professional use. Filter Replacement: Internal filters have been replaced with new ones. Additionally, two spare filters and tools are included, allowing for long-term use without purchasing additional maintenance parts. Case Rebuild: The peeling inside the genuine hard case has been repaired with fabric adhesive. [Set Contents] ER-4P Unit (with new filters) Custom-made 68Ω (ER-4S) Conversion Adapter Hard Case (internally repaired) Genuine Carrying Case 2x Replacement Filters / 2x Replacement Tools Clip Click here for the manufacturer's site 
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