Maestraudio MA910SR DC [Earphones with 10mm graphene dynamic driver & 9mm ceramic tweeter RST] Adopts natural southern cedar SAHP technology Optimized

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.

[Using ceramics and wood, unique technology] MA910SR DC, like the MA910SR, uses a 10mm diameter graphene coated dynamic driver and a new passive passive that uses unique ceramic audio technology.Equipped with a type tweeter "RST" (Reactive Sympathetic Tweeter), it achieves the widest spatial expression at the highest level in its class.The MA910SR DC eliminates the HDSS that was installed in conventional products, and instead uses the proprietary technology ``SAHP'' (Sound Absorbing Honeycomb Pore), which uses the honeycomb-shaped pores of trees as a sound absorbing material.s) was adopted for the first time.We selected "Donan Cedar", which grows in the northernmost part of Japan, as the material for the faceplate, which matches the sound we were aiming for and the suitability of the SAHP, and carefully tuned it. [RST (Reactive Sympathetic Tweeter)] Maestraudio brand's unique piezoelectric ceramic technology."RST" (Reactive Sympathetic Tweeter) is a passive ceramic coated tweeter with a new concept that allows you to control sound quality by adjusting the dimensions, material, and support method of the diaphragm.The sound waves from the dynamic driver are irradiated onto the diaphragm to induce vibrations, and high-pitched sounds are efficiently transmitted forward even if they are off the same axis, and they are characterized by split vibrations similar to cymbals, music boxes, etc.This allows for a wide sound stage despite the small casing of the earphone. [SAHP (Sound Absorbing Honeycomb Pores)] Traditionally, the design requirement for using trees in earphones was to use them as a structural material in the housing.For this reason, hard and dense wood species were chosen for the trees.At the same time, users also tended to choose items with dense grains.A different idea from this application of trees as structural materials is to use trees as acoustic materials by locating the tree fibers in the horizontal direction of the faceplate and optimizing the sound absorption level of the rear air chamber of the casing to achieve the desired sound.The technology that makes this possible is "SAHP*" (Sound Absorbing Honeycomb Pores) technology.Sound absorption has various benefits, such as eliminating noise and widening the sound stage.In particular, sound absorption by trees can be expected to realistically reproduce the sound of stringed instruments such as violins and guitars.However, to improve the efficiency of absorption, it is necessary to select trees with uniform fibers, and to optimize absorption, it is necessary to design the depth and diameter of the sound absorption pores.*Trademark pending [Using natural "Hokkaido Cedar" for the face plate material] Tree vascular bundles are a collection of long and narrow honeycomb tubes, and when observed under a microscope, you can see that they have a beautiful honeycomb structure.Therefore, wood is often used as an anisotropic material with a high specific strength (strong despite being light) for construction materials.The conventional idea was to create earphones by taking advantage of these characteristics of being "light and strong" as a structural material.On the other hand, SAHP technology requires that the fiber pores of the tree be uniform in order to ensure uniformity in the amount of absorption of the faceplate.Therefore, conifers are generally suitable rather than hardwoods.Since twisting in the fiber direction causes uneven sound absorption, we selected cedar, a tree with excellent elasticity and little twisting.At Maestraudio, we procured and investigated various types of cedar in Japan and found that ``Donan cedar'', which grows in the northernmost part of Japan, is suitable for SAHP.For the MA910SR DC, we borrowed the power of various woodworking craftsmen in Morimachi, Kayabe District, Hokkaido, and selected "Donan Cedar" for the face plate material, and applied a coating that has little effect on the fiber quality of the tree, improving the acoustic performance of the earphone.Ta. ●Shape: IEM type (ear hook type) ●Driver: Hybrid type: 10mm diameter graphene coat dynamic driver x 1, 9mm diameter RST (Reactive Sympathetic Tweeter) x 1●InPeedance: 16Ω●Sensitivity: 106dB●Frequency characteristics: 20Hz to 40KHz●Cable length: Approx. 1.2m (3.5mm 3-pole L-shaped plug)●Cable: Silver coat OFC & OFC hybrid●Connector: Pentaconn ear ●Accessories: iSep02 silicone earpiece (S/MS/M/L), genuine leather cord reel, carrying pouch ●Country of production: Japan