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Headfonia 2019 AWARDS Best IEM Cable

STR7Ref. earphone re-cable

STR7-Ref. cable is developed to be the ideal earphone re-cable, following the high sound quality design adopted in our earphone re-cable, and adopting BriseAudio's original high sound quality design MURAKUMO structure in part. The STR7-Ref. is the first to adopt the newly developed original high sound quality MMCX connector and 2-pin connector, and is treated with a broadband non-magnetic special laminated electromagnetic wave absorbing material consisting of 7 layers.

Furthermore, the STR7-Ref. uses L-shaped OFC plugs (5-pole 4.4mm, 3-pole 3.5mm, 4-pole 3.5mm, and 4-pole 2.5mm) on the amplifier connection side to further improve sound quality in many connection environments. The STR7-Ref. has further improved the sound quality by adopting 3.5mm 3-pole, 4-pole 3.5mm, and 4-pole 2.5mm connectors. The STR7-Ref. has achieved an overwhelmingly improved SN, wider range, and better visibility of sound field space.

The photo shows the 4-pole 2.5mm L-shaped plug version of the STR7-Ref.

The photo shows the 5-pole 4.4mm L-shaped plug version of STR7-Ref.

The photo shows the 3-pole 3.5mm L-shaped plug version of STR7-Ref.

Genuine FitEar connector is used.

The photo shows the 4-pole 3.5mm L-shaped plug version of the STR7-Ref.

A special BriseAudio box is included.


We have adopted titanium wire, which is specially treated after evaluating sound quality and selecting the material.

It is carved out of solid rosewood. It is finished with a very high texture.


材質に拘り、音質を評価し材料を選定し特殊処理を施したチタンワイヤーを採用いたしました。 これにより、耳周りの取り回しと音質の両面を支えることが可能になりました。

The tip is bent to prevent ejection & for safety measures.

Newly developed original high sound quality connector (MMCX, 2PIN)

STR7Ref.に採用のMMCX(2ピン)コネクタは、音質向上を目的にBriseaudio独自で新開発いたしました。全ての素材について、コストをかけ吟味しBriseAudioのノウハウを投入し設計いたしました。それにより大きな音質上のアップデートを実現。更には、広帯域非磁性特殊積層電磁波吸収材(7層構造)によるシールドを施すことで、狭小なスペースでありながら強固なシールド効果を実現しています。 これにより信号の終端まで妥協のない伝送を目指しています。

You can now also choose a dedicated terminal for SONY earphones (IER-M7 IER-M9 IER-Z1R).

Uses genuine FitEar connector


OFC (oxygen-free copper) high sound quality original L-shaped plugs (5-pole 4.4mm, 4-pole 2.5mm, 4-pole 3.5mm, 3-pole 3.5mm) of all 4 types are used

STR7Ref.で採用のL字プラグは、日本ディックス社製L字4.4mmOFC(無酸素銅)Pentaconnをベースにした弊社オリジナル仕様のプラグです。従来のストレートプラグと比べ、格段に取り回しが改善し非常に扱いやすくなっています。 OFC-L字プラグが演出する、他と一線を画す情報量と鮮度感、純度の高い音をコンパクトに取り回しよくお使い頂けるようになりました。 その性能を最大限発揮させるべく、BriseAudioフラグシップケーブルMURAKUMOに採用の11層構造(7層構造の広帯域非磁性特殊積層電磁波吸収材を3層含む)を更に施工しました。

Structure of MURAKUMO (11-layer spiral structure)



STR7 [Spiral77) Schematic of the structure

Product line-up

STR7Ref. OFC L型5極Φ4.4mmプラグ-MMCX 【型番:STR7ER544LMXB】JAN:4589796723486
STR7Ref. OFC L型5極Φ4.4mmプラグ-2PIN 【型番:STR7ER544L2PB】JAN:4589796723493
STR7Ref. OFC L型4極Φ2.5mmプラグ-MMCX 【型番:STR7ER425LMXB】JAN:4589796723509
STR7Ref. OFC L型4極Φ2.5mmプラグ-2PIN 【型番:STR7ER425L2PB】JAN:4589796723516
STR7Ref. OFC L-type 4-pole 4-pole Φ3.5mm plug - MMCX [Model Number: STR7ER435LMXB] JAN:4589796723523
STR7Ref. OFC L型4極Φ3.5mmプラグ-2PIN 【型番:STR7ER435L2PB】JAN:4589796723530
STR7Ref. OFC L-type 3-pin Φ3.5mm plug - MMCX [Model number: STR7ER335LMXB] JAN:4589796723547
STR7Ref. OFC L型3極Φ3.5mmプラグ-2PIN 【型番:STR7ER335L2PB】JAN:4589796723554
STR7Ref. OFC L型5極Φ4.4mmプラグ-FitEar【型番:STR7ER544LFEB】 JAN:4589796724179
STR7Ref. OFC L-type 4-pole Φ2.5mm plug - FitEar [Model Number: STR7ER425LFEB] JAN:4589796724186
STR7Ref. OFC L型4極Φ3.5mmプラグ-FitEar【型番:STR7ER435LFEB】 JAN:4589796724193
STR7Ref. OFC L型3極Φ3.5mmプラグ-FitEar【型番:STR7ER335LFEB】 JAN:4589796724209
STR7Ref. OFC L型5極Φ4.4mmプラグ-A2DC【型番:STR7ER544LADB】 JAN:4589796705703
STR7Ref. OFC L型4極Φ2.5mmプラグ-A2DC【型番:STR7ER425LADB】 JAN:4589796705710
STR7Ref. OFC L型4極Φ3.5mmプラグ-A2DC【型番:STR7ER435LADB】 JAN:4589796705727
STR7Ref. OFC L-type 3-pin Φ3.5mm plug - A2DC [Model Number: STR7ER335LADB] JAN:4589796705734

[ SONY製イヤホン(IER-M7 IER-M9 IER-Z1R)専用端子に対応 ]
STR7Ref. OFC L-type 5-pole Φ4.4mm plug - IER [Model Number: STR7ER544LIERB] JAN:4589796706069
STR7Ref. OFC L型4極Φ2.5mmプラグ-IER【型番:STR7ER425LIERB】 JAN:4589796706076
STR7Ref. OFC L型4極Φ3.5mmプラグ-IER【型番:STR7ER435LIERB】 JAN:4589796706083
STR7Ref. OFC L-type 3-pole 3.5mm diameter plug - IER [Model Number: STR7ER335LIERB] JAN:4589796706090

[ Sennheiser ゼンハイザー製イヤホン(IE300 IE900)対応MMCXに対応 ]
STR7Ref. OFC L-type 5-pole Φ4.4mm plug - MMCX for Sennheiser IE300, IE900 [Model Number: STR7ER544LZIEMB] JAN:4589796708032
STR7Ref. OFC L型4極Φ2.5mmプラグ-ゼンハイザー IE300, IE900用MMCX【型番:STR7ER425LZIEMB】 JAN:4589796708049
STR7Ref. OFC L型4極Φ3.5mmプラグ-ゼンハイザー IE300, IE900用MMCX【型番:STR7ER435LZIEMB】 JAN:4589796708056
STR7Ref. OFC L型3極Φ3.5mmプラグ-ゼンハイザー IE300, IE900用MMCX【型番:STR7ER335LZIEMB】 JAN:4589796708063

*See below for custom 2PIN pin assignments.

*The aging period settles down after about 200 hours.

ConductorHigh-performance high-purity copper conductor
Conductor structureSpiral77
Special ProcessesPartially 11-layer MURAKUMO construction
IsolationSpecial High Performance Resins
TerminalDepends on each specification
Warranty Period高音質オリジナルMMCX & 2pinコネクタ,純正FitEarコネクタ

 *Please note that some specifications may be changed without prior notice for the purpose of product improvement. We appreciate your understanding.

The compatible grades of STR7Ref. earphone re-cables are

STR7 × Ref.

BriseAudio's cable grades
 線材のグレード × チューニング加工のグレード
It will be decided by.



Stores with STR7Ref. listening devices already deployed

The number of stores where you can listen to our products is expanding at any time. If there is no listening location near you, we can lend you the equipment directly (in Japan).
If the cables are deployed but are not available in the store for audition, please contact the store staff.

3F Nakano Broadway, 5-52-15 Nakano, Nakano-ku, Tokyo 164-0001 TEL: 0120-189-248
STR7Ref.OFC Pentaconn L型(4.4mm,2.5mm)のMMCX,&2PIN各種試聴機ございます。

◆e earphone Akihabara store
〒101-0021 東京都千代田区外神田4-7-1 新東ビル  TEL(ナビダイヤル):0570-06-1118(受付時間 11:00 ~ 20:00)
STR7Ref.OFC Pentaconn L型(4.4mm,2.5mm,4極3.5mm,3極3.5mm)のMMCX,&2PIN各種試聴機ございます

Contact Us

Please feel free to contact us, including inquiries about our products.

Request a Listening Trial

This is a service that allows you to listen to the music in your own home. This service is available only for residents in Japan.

Click here to purchase

Go to the STR7Ref. purchase page.

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