init

01_reddit-post.md

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+https://www.reddit.com/r/headphones/comments/8eysek/diy_bluetooth_athm50s/
+
+
+[<img src="./resources/01_Reddit/01.jpg" width="800">](./resources/01_Reddit/01.jpg)
+[<img src="./resources/01_Reddit/02.jpeg" width="800">](./resources/01_Reddit/02.jpeg)
+[<img src="./resources/01_Reddit/03.jpeg" width="800">](./resources/01_Reddit/03.jpeg)
+[<img src="./resources/01_Reddit/04.jpeg" width="800">](./resources/01_Reddit/04.jpeg)
+
+---
+
+I put a Bluetooth receiver into my ATH-M50s and also made the cable removable. Roughly 8 hours of battery and range is pretty good. Honestly can't tell any difference in sound quality other than the signal dropping every now and then.
+
+Also idk if other bluetooth headphones can do this, but if you connect to the headphones and plug the aux to another speaker, it'll make that speaker bluetooth lol
+
+---
+
+Here are the main parts:
+
+Bluetooth receiver - https://www.amazon.com/gp/product/B008AGQMQC/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1
+
+3.5 jack - https://www.amazon.com/gp/product/B01C3RFHDC/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1
+
+side button - https://www.amazon.com/gp/product/B01LYZSEVB/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1
+
+You could probably find cheaper options. I just bought a lot because there wasn't really any tutorials out there on doing this. Other stuff you would need are a soldering iron, a dremel, and some wires, Also, please get better earcups if you haven't already - https://www.amazon.com/gp/product/B00MFDT894/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1
+
+Here are the internals: https://imgur.com/gallery/N91espA

02_video_open-m50x-and-replace-cable.md

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+https://www.youtube.com/watch?v=h2tPXLFPYso

03_Bluetooth-adapter.md

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+# Bluetooth receiver + DAC + amplifier + battery
+
+## MPOW receivers
+
+Small with included battery
+
+* built in battery
+* small form factor
+* https://www.xmpow.com/collections/wireless-receiver
+
+### MPOW Bluetooth 4.1 audio receiver
+
+* 10h battery
+* [xmpow.com](https://www.xmpow.com/products/mpow-bh044d-bluetooth-receiver)
+
+[<img src="./resources/03_Mpow/03_Mpow_044.jpg" width="800">](./resources/03_Mpow/03_Mpow_044.jpg)
+
+### MPOW Bluetooth 5.0 aptX audio receiver
+
+* [xmpow.com](https://www.xmpow.com/products/mpow-bh390a-2-in-1-transmitter-receiver-aptx-low-latency-bluetooth-5-0#opinew-plugin)
+* [amazon.de](https://www.amazon.de/-/en/gp/product/B07X8VGV3G/ref=ask_ql_qh_dp_hza)
+* 15m working range
+* **TODO**: What are the dimensions?
+  * 5 bis 6cm x 3.5 x 1 bis 1.5 cm (Amazon Q&A)
+* [manual](resources/03_Mpow/03_Mpow-Bluetooth-Transmitter-and-Receiver-BH390A-Manual-Optimized.pdf)
+
+[<img src="./resources/03_Mpow/03_Mpow_390.jpg" width="800">](./resources/03_Mpow/03_Mpow_390.jpg)
+
+## TaoTronics TT-BA07
+
+There are two different versions of this model.
+
+* Bluetooth (VersionA)
+  * Bluetooth Version: Bluetooth V4.1 with EDR
+  * Bluetooth Profile: A2DP
+* Bluetooth (VersionB)
+  * Bluetooth Version: Bluetooth V5.0
+  * Bluetooth Profile: A2DP / AVRCP
+* aptX audio codec
+* 4.55 x  3.25 x 0.95 cm
+* [pdf (VersonA)](resources/03_TT-BA07/VersionA.pdf)
+* [pictures (VersionB)](resources/03_TT-BA07/VersionB/)
+* [taotronics.com](https://de.taotronics.com/TT-BA07-Bluetooth-Adapter.html)
+* 18€ on [eBay.de](https://www.ebay.de/itm/Bluetooth-Adapter-Audio-Transmitter-Empfanger-2-in-1-Sender-Receiver-Adapter/393199061678?hash=item5b8c7d8aae:g:tEIAAOSwu3FgAGTg)
+  * used for ~15€
+
+## TaoTronics TT-BR05
+
+* Bluetooth 4.0 with EDR
+* 5.2 x 2.55 x 1.04 cm
+* [pdf](resources/03_TaoTronics_TT-BR05.pdf)
+
+## bluetooth receiver and battery charger
+
+* 3.7-5V in via micro-USB
+  * Maximum: 5V with 2A
+  * 2x 5W audio output
+  * Can be used to **charge** a connected 3.7V lithium battery,
+    but the battery itself needs a protection board (PCB)!
+* 4.0 x 2.0 cm
+* bluetooth 5.0
+  * device name: DW-CT14+
+* [amazon.de](https://www.amazon.de/Bluetooth-Empf%C3%A4ngermodul-Verst%C3%A4rkerplatine-verst%C3%A4rker-drahtlose-Lautsprecher-Rot/dp/B08BJNX7M7/ref=psdc_571838_t2_B07JLC2JMT)
+* ebay: Watch out for the **version number**
+  * 3.7€: [ebay1](https://www.ebay.de/itm/333672497058?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20201210111314%26meid%3D5d0a0e012fd146088e6c235863f19052%26pid%3D101195%26rk%3D5%26rkt%3D12%26mehot%3Dco%26sd%3D153586311236%26itm%3D333672497058%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv9PairwiseUnbiasedWeb%26brand%3DUnbranded&_trksid=p2047675.c101195.m1851)
+  * 2.14€: [ebay2](https://www.ebay.de/itm/323056335757?hash=item4b37a87b8d:g:K4oAAOSw05taeUIz)
+
+[<img src="./resources/03_DW-CT14/1.jpg" width="800">](./resources/03_DW-CT14/1.jpg)
+[<img src="./resources/03_DW-CT14/2.jpg" width="800">](./resources/03_DW-CT14/2.jpg)
+[<img src="./resources/03_DW-CT14/3.jpg" width="800">](./resources/03_DW-CT14/3.jpg)
+[<img src="./resources/03_DW-CT14/4.jpg" width="800">](./resources/03_DW-CT14/4.jpg)
+
+## VHM-314
+
+Bluetooth DAC **without** battery or charging circuit
+
+* 2.22 € on [eBay](https://www.ebay.de/itm/VHM-314-MP3-Bluetooth-5-0-Amplifier-Board-Audio-Lossless-Decoder-Module-D7W1/114446078916?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20201210111314%26meid%3D5e96aabe6db643b38e5128ed0fa30430%26pid%3D101195%26rk%3D2%26rkt%3D12%26mehot%3Dco%26sd%3D264942688446%26itm%3D114446078916%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv9PairwiseUnbiasedWeb%26brand%3DMarkenlos&_trksid=p2047675.c101195.m1851)
+* power in: DC 3.7-5V
+* Bluetooth 5.0
+* "lossless MP3"
+* Decoder Module D7W1
+* **small**:  3.3 x 3.5 x 1.1cm
+
+Amazon Reviews:
+
+> Wenn es allerdings nicht über Akku oder Batterie, sondern über ein
+> Netzteil betrieben wird, macht es einige Störgeräusche im Standby
+
+> Macht Störgeräusche bei jeder Stille, auch innerhalb eines Tracks.
+> Sehr störed, da hilft auch Bluetooth 5.0 mit WAV oder Flac nichts,
+> wenn zwischendurch irgendwo Stille ist und die direkt mit nem
+> Quietscher eingeläutet wird.
+
+> Tends to overload and distort fairly easily. The loop through is very
+> poor with bad distortion.
+
+
+[<img src="./resources/03_VHM-314.jpg" width="800">](./resources/03_VHM-314.jpg)
+
+## lithium-ion battery converter
+
+* power in: 5V (micro-USB)
+* power out: 5V 
+* 1.66 € on [eBay](https://www.ebay.de/itm/DC5V-Micro-USB-18650-3-7V-Lithium-Li-ion-Battery-Charger-DIY-Module-Power-F0/284209282868?hash=item422c317f34:g:M8UAAOSwr3heUJDZ)
+* **small**: 3.5cm x 1.5 cm
+
+[<img src="./resources/03_battery-charger-1.jpg" width="800">](./resources/03_battery-charger-1.jpg)
+[<img src="./resources/03_battery-charger-2.jpg" width="800">](./resources/03_battery-charger-2.jpg)
+
+## lithium-ion battery charger
+
+* power in: 4.5-6.0V (-> micro-USB 5V)
+* power out: (?) 3.7V I guess (straight from the batteries)
+* battery protection (overcharge, over-discharge, overcurrent)
+* one or two batteries can be connected
+* **smaller**: 2.8 x 1.7 cm
+
+* [addicore.com](https://www.addicore.com/TP4056-Charger-and-Protection-Module-p/ad310.htm#resources)
+* [eBay](https://www.ebay.de/itm/1-2-5-TP4056-5V-1A-18650-Micro-USB-Lithium-Battery-Charger-Module-Protected/402351347534?hash=item5dae02574e:g:nMEAAOSwSmJfKsgZ)
+* [eBay, USB-C](https://www.ebay.de/itm/1-2-5-TP4056-5V-1A-18650-Type-C-USB-Lithium-Battery-Charger-Module-Protected/402353617147?hash=item5dae24f8fb:g:3mQAAOSwHAdfLTa7)
+
+More details in folder [03_TP4056_TC4056A](resources/03_TP4056_TC4056A)
+
+[<img src="./resources/03_TP4056_TC4056A/img2-a.jpg" width="800">](./resources/03_TP4056_TC4056A/img2-a.jpg)
+[<img src="./resources/03_TP4056_TC4056A/img1.jpg" width="800">](./resources/03_TP4056_TC4056A/img1.jpg)
+
+## lithium-ion battery charger
+
+* Uses the TP4056 chip as well.
+* A bit smaller in size
+
+* [ebay](https://www.ebay.de/itm/1-x-Micro-USB-5V-1A-LiPo-Lithium-Li-ion-Akku-Batterie-Lade-Modul-DIY-Chip-TP4056/401705655188?hash=item5d8785db94:g:l5cAAOSwH6lcYX9p)
+
+## tiny USB-C LiPo charger
+
+* [crowdsupply.com](https://www.crowdsupply.com/beast-devices/ant2-lipo-charger)
+* [hackaday.io](https://hackaday.io/project/176321-ant2-usb-c-lipo-charger)

04_battery.md

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+# lithium batteries
+
+
+
+## lithium polymer battery (LiPo)
+
+### akkuplus.de
+
+Probably all with PCM (battery protection boards)
+
+* 300mAh, 3.5 x 2.0 x 0.5 cm
+  * https://akkuplus.de/Einzelzelle-502035-052035-37-Volt-300mAh-Li-Polymer
+* 370mAh, 4.0 x 2.0 x 0.5 cm
+  * https://akkuplus.de/Einzelzelle-502040-052040-37-Volt-370mAh-Li-Polymer
+* 500mAh, 3.5 x 2.0 x 0.8 cm
+  * https://akkuplus.de/Einzelzelle-802035-082035-37-Volt-500mAh-Li-Polymer
+* 500mAh, 3.5 x 2.5 x 0.5 cm
+  * https://akkuplus.de/Einzelzelle-502535-052535-37-Volt-500mAh-Li-Polymer
+* 500mAh, 5.2 x 1.4 x 0.6 cm
+  * https://akkuplus.de/Einzelzelle-601452-061452-37-Volt-500mAh-Li-Polymer
+* 550mAh, 3.8 x 2.3 x 0.61 cm
+  * https://akkuplus.de/Einzelzelle-612338-062338-37-Volt-550mAh-Li-Polymer
+* 850mAh, 5.614 x 2.6 x 5.80 cm
+  * https://akkuplus.de/Ersatzakku-CS-SRD102SL-Cardo-Packtalk-Duo-BAT00007-37-Volt-850mAh-Li-Polymer
+
+## 602244
+
+* 550mAh
+* 4.4 x 2.2 x 0.6 cm (+/- 0.05cm)
+* PCM
+* https://www.amazon.de/DronePost-Batterie-602244-Wiederaufladbar-Tragbar/dp/B084Z9NGK5/ref=sr_1_2?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=3%2C7v+550mAh&qid=1619259512&sr=8-2
+
+## 602045
+
+* 550mAh
+* 4.75 x 2.1 x 0.6 cm (+/- 0.05cm)
+* PCM: "Integrierte PCM-Schutzschaltung gegen Überladung oder
+  übermäßige Entladung. Schutzfunktion: Überladung, Überentladung,
+  Überstrom, Kurzschlussschutz, Übertemperaturschutz."
+* https://www.amazon.de/DronePost-Batterie-602045-Wiederaufladbar-Tragbar/dp/B088NL9GSD/ref=sr_1_3?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=3%2C7v+550mAh&qid=1619259512&sr=8-3
+
+[<img src="./resources/04_LiPo-602045/1.jpg" width="800">](./resources/04_LiPo-602045/1.jpg)
+[<img src="./resources/04_LiPo-602045/4.jpg" width="800">](./resources/04_LiPo-602045/4.jpg)
+[<img src="./resources/04_LiPo-602045/2.jpg" width="800">](./resources/04_LiPo-602045/2.jpg)
+[<img src="./resources/04_LiPo-602045/5.jpg" width="800">](./resources/04_LiPo-602045/5.jpg)
+[<img src="./resources/04_LiPo-602045/3.jpg" width="800">](./resources/04_LiPo-602045/3.jpg)
+
+## lithium-ion batteries
+
+### 18650 lithium-ion battery
+
+*  1.8 x 7.0 cm
+
+> AA vs 18650 lithium ion battery
+> 
+> [<img src="./resources/03_Liion-18650-vs-AA-battery.jpg" width="800">](./resources/03_Liion-18650-vs-AA-battery.jpg)
+
+#### Keeppower
+
+* 3400mAh (min.), 3.6-3.7V (nominal voltage)
+* 14.95€ ( + 4.90€ shipping )
+* with protection
+* [akkuteile.de](https://www.akkuteile.de/lithium-ionen-akkus/18650/keeppower/pcb-geschuetzt/keeppower-18650-3500mah-li-ionen-3-7v-3-6v-pcb-geschuetzt-mit-usb-lademoeglichkeit-p1835u_12070_2779)
+
+#### Trustfire
+
+* 2050mAh (min.), 3.7V (nominal voltage)
+* 5.60€ ( + 4.90€ shipping )
+* with protection
+* [akkuteile.de](https://www.akkuteile.de/trustfire-18650-2400mah-3-7v-protected_100617_1218)
+
+### 14430 lithium-ion battery
+
+* 1.4 x 4.6 cm
+
+#### Keeppower
+
+* 650mAh (min.), 3.7V (nominal voltage)
+* with protection
+* 4.95€ ( + 4.90€ shipping )
+* [akkuteile.de](https://www.akkuteile.de/lithium-ionen-akkus/14430/keeppower/keeppower-14430-650mah-3-7vli-ion-akku-geschuetzt_12001_1005)
+
+### 10440 lithium-ion battery
+
+* 4.6 x 1.0 cm
+
+#### Trustfire
+
+* 300mAh (min.), 3.6-3.7V (nominal voltage)
+* with protection
+* 4.45€ ( +4.90€ shipping )
+* [akkuteile.de](https://www.akkuteile.de/lithium-ionen-akkus/14500/trustfire/trustfire-10440-600mah-3-7v-geschuetzte-li-ionen-zelle_101106_2165)
+
+[<img src="./resources/04_Trustfire-600mAh-10440-3-7v-Protected-Lithium-ion-battery.jpg" width="800">](./resources/04_Trustfire-600mAh-10440-3-7v-Protected-Lithium-ion-battery.jpg)

05_bluetooth-mod-steps-and-pictures.md

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+# Audiotechnica ATH-50x - Bluetooth and detachable 3.5mm AUX cable DIY mod
+
+## Inspecting the headphones
+
+1. Remove the left ear pad (headphone cushion),
+   and open the left speaker by removing 4 screws.
+
+[<img src="./resources/05_pics/1.jpg" width="800">](./resources/05_pics/1.jpg)
+
+2. Cable to left driver: Blue is `left` and
+   copper is `ground`.
+
+[<img src="./resources/05_pics/2.jpg" width="800">](./resources/05_pics/2.jpg)
+
+3. Audiotechnica specific audio input (**not** 3.5mm aux) with wiring
+   `left`, `ground`, `ground`, `right`.
+   One cable is going through 
+   the hinge and to the opposite driver.
+
+   There is a white silencing pad which will be
+   replaced in favour of our bluetooth receiver.
+   
+[<img src="./resources/05_pics/3.jpg" width="800">](./resources/05_pics/3.jpg)
+[<img src="./resources/05_pics/4.jpg" width="800">](./resources/05_pics/4.jpg)
+
+4. There isn't too much space inside the left speaker ...
+   The diameter of the ellipse is around 6cm.
+
+[<img src="./resources/05_pics/5.jpg" width="800">](./resources/05_pics/5.jpg)
+
+5. A circular piece of plastic with another
+   silencing pad holds the driver in place.
+   If this is removed there is some additional space
+   inside the speaker, but the driver would need
+   to be glued to stay in place.
+   
+[<img src="./resources/05_pics/6.jpg" width="800">](./resources/05_pics/6.jpg)
+
+> Note how the driver is angled.
+
+[<img src="./resources/05_pics/7.jpg" width="800">](./resources/05_pics/7.jpg)
+
+## What fits inside the speaker?
+
+A 0.9cm diameter piece of rubber for testing ;)
+
+[<img src="./resources/05_pics/8.jpg" width="800">](./resources/05_pics/8.jpg)
+
+1. If the rubber is placed to the left where the
+   driver sticks out most, then one can not
+   assemble it together ...
+
+[<img src="./resources/05_pics/9.jpg" width="800">](./resources/05_pics/9.jpg)
+
+> Note the space between the upper and lower parts.
+
+[<img src="./resources/05_pics/10.jpg" width="800">](./resources/05_pics/10.jpg)
+
+2. A "dummy" 10440 lithium-ion battery (approx. 
+   4.6 long with a diameter of 1.0 cm) held in place
+   by a rubber.
+   This does obviously **not** fit inside.
+   Even if one grinds off the dot in the center of
+   the speaker, this does not fit.
+   So one needs a low-profile lithium-ion battery
+   (similar to those in modern smartphones) to power
+   the bluetooth receiver.
+
+[<img src="./resources/05_pics/13.jpg" width="800">](./resources/05_pics/13.jpg)
+[<img src="./resources/05_pics/14.jpg" width="800">](./resources/05_pics/14.jpg)
+
+3. If the rubber is placed in the (upper/lower) middle
+   then one can almost fit it perfectly together.
+   It sticks out just a tiny bit.
+
+[<img src="./resources/05_pics/11.jpg" width="800">](./resources/05_pics/11.jpg)
+[<img src="./resources/05_pics/12.jpg" width="800">](./resources/05_pics/12.jpg)
+
+## The required parts
+
+### DIY 3.5mm AUX whole
+
+[<img src="./resources/05_pics/17.jpg" width="800">](./resources/05_pics/17.jpg)
+[<img src="./resources/05_pics/16.png" width="800">](./resources/05_pics/16.png)
+
+### Bluetooth receiver - TaoTronics TT-BA07
+
+[<img src="./resources/05_pics/27.jpg" width="800">](./resources/05_pics/27.jpg)
+[<img src="./resources/05_pics/28.jpg" width="800">](./resources/05_pics/28.jpg)
+
+Removing the case:
+
+[<img src="./resources/05_pics/26.jpg" width="800">](./resources/05_pics/26.jpg)
+
+Removing the battery - we'll use a larger one!
+
+[<img src="./resources/05_pics/29.jpg" width="800">](./resources/05_pics/29.jpg)
+[<img src="./resources/05_pics/30.jpg" width="800">](./resources/05_pics/30.jpg)
+
+---
+
+[<img src="./resources/05_pics/15.png" width="800">](./resources/05_pics/15.png)
+
+Power on button removed:
+
+[<img src="./resources/05_pics/22.jpg" width="800">](./resources/05_pics/22.jpg)
+
+Let's attach some wires:
+* The two wires on the left will connect to a power button on the
+  outside of the headphone. With this button one can control the bluetooth receiver:
+  Turn it on/off, pause/resume music and enable pairing mode.
+* Three wires on the right will connect the audio from the bluetooth receiver
+  with our DIY 3.5mm aux whole.
+
+[<img src="./resources/05_pics/23.jpg" width="800">](./resources/05_pics/23.jpg)
+
+### Button
+
+A desoldered button from some old electronics.
+
+The lower and upper left pins are not connected,
+when the button is not pressed. Same goes for the lower and upper right pins.
+
+When the button is pressed, all pins are connected to each other.
+
+[<img src="./resources/05_pics/18.jpg" width="800">](./resources/05_pics/18.jpg)
+
+### ATH-M50x
+
+Let's drill some wholes into the left headphone cup:
+
+[<img src="./resources/05_pics/31.jpg" width="800">](./resources/05_pics/31.jpg)
+
+* One large whole to recharge the bluetooth receiver:
+
+[<img src="./resources/05_pics/25.jpg" width="800">](./resources/05_pics/25.jpg)
+
+* Here a micro USB cable is plugged through the whole from outside:
+
+[<img src="./resources/05_pics/24.jpg" width="800">](./resources/05_pics/24.jpg)
+
+* Four wholes to attach the button on the outside
+
+[<img src="./resources/05_pics/19.jpg" width="800">](./resources/05_pics/19.jpg)
+[<img src="./resources/05_pics/21.jpg" width="800">](./resources/05_pics/21.jpg)
+
+* On two of the 4 connectors of the button, place large bowls of soldering
+  iron - this holds the button in place:
+
+[<img src="./resources/05_pics/20.jpg" width="800">](./resources/05_pics/20.jpg)
+
+### The battery
+
+[<img src="./resources/04_LiPo-602045/2.jpg" width="400">](./resources/04_LiPo-602045/2.jpg)
+
+### (Optional) Better earpads
+
+Brainwavz Audio - ATH-M Series - Pro Stock - Micro Suede
+
+[<img src="./resources/05_brainwavz%20audio%20-%20ATH-M%20series%20-%20Pro%20Stock%20-%20micro%20suede.webp" width="800">](./resources/05_brainwavz%20audio%20-%20ATH-M%20series%20-%20Pro%20Stock%20-%20micro%20suede.webp)
+
+## The final assembly
+
+Well, before we glue and solder it all together, let's do a listening test!
+In the picture below I turned the bluetooth receiver on/off by holding the
+two "button" wires together:
+
+[<img src="./resources/05_pics/32.jpg" width="800">](./resources/05_pics/32.jpg)
+
+The inserted bluetooth receiver is held in place by some hot glue.
+
+Soldering the three red "audio" cables from the bluetooth receiver together
+two black cables coming from the left and right drivers (each containing two
+cores) onto the 3.5mm aux plug was a bit tricky.
+But luckily I had another person helping me out holding all those wires in
+place, so I could solder it.
+
+[<img src="./resources/05_pics/34.jpg" width="800">](./resources/05_pics/34.jpg)
+
+Time for another listening test. This time both headphone drivers and the
+earphones plugged into the 3.5mm aux whole should play music - both with
+correctly oriented left/right audio.
+
+[<img src="./resources/05_pics/35.jpg" width="800">](./resources/05_pics/35.jpg)
+
+Now add some more glue to the bluetooth receiver and
+aux plug.
+
+[<img src="./resources/05_pics/36.jpg" width="800">](./resources/05_pics/36.jpg)
+
+Insert the battery, connect it with the power input of the bluetooth receiver
+and solder the two "button" wires from the bluetooth receiver to the button
+of the headphone cup.
+
+[<img src="./resources/05_pics/37.jpg" width="800">](./resources/05_pics/37.jpg)
+
+That's pretty much it :) Only steps left are closeing the left headphone cup and reattaching the earpads.
+
+## Final result
+
+[<img src="./resources/05_pics/33.jpg" width="800">](./resources/05_pics/33.jpg)
+[<img src="./resources/05_pics/38.jpg" width="800">](./resources/05_pics/38.jpg)
+[<img src="./resources/05_pics/39.jpg" width="800">](./resources/05_pics/39.jpg)
+[<img src="./resources/05_pics/40.jpg" width="800">](./resources/05_pics/40.jpg)
+[<img src="./resources/05_pics/41.jpg" width="800">](./resources/05_pics/41.jpg)