This is a custom product built by Earphone DIY Labs inspired by Final F7200. It is an extremely small and lightweight single BA IEM, with a perfect fit and high sound insulation properties. Choose the Assembling Option and our professionals will make it for you in 1~2 days.
You are an experienced DIYer? Great! Choose the All Separated Components Option and follow the tutorial below to enjoy the fun of DIY. By having basic soldering and gluing skills, you can easily make it in audiophile sound quality, with support from Earphone DIY Labs for any issue in your DIY journey.
Question about shipping? Check out our shipping service.
Here are the key values of this kit:
- Extremely small (5.5mm), lightweight (23g) and durable (stainless steel) shell
- Perfect fit and high sound isolation properties
- Situated close to the eardrum, this earbud delivers high resolution, a vast sound stage and rich bass tones.
- Built with similar full spectrum Balanced Armature drivers used in Final F7200, manufactured in Denmark
- Upgrade BA driver option to Knowles RAB32257 for better bass performance
- MMCX connectors and custom 6N silver plated OFC OFC cable.
Safe fit edge for silicon or foam ear-tips to protect your ear, which is also compatible with all 4.3mm ear tips you can easily buy from most markets
- Unbeatable price – you save 80%+ budget for the equivalent or better sound quality
What’re in the package
- A pair of earbuds
- 2 pairs of silicon ear tips in middle size
- 2 pairs of memory foam ear tips in middle and large size
- 1 cable in crystal white or black
- A carry case
What components can I choose from?
You can choose from 2 driver options. See the next sections for impressions about these components.
- Sonion full spectrum balanced armature drivers model 26A007/9
- Or upgrade to Knowles full spectrum balanced armature drivers model RAB 32257 for better bass performance
How does the F7200 sound with different BA drivers?
With the Sonion BA Drivers
It basically same as Final F7200 as both the drivers and the acoustic design being very close. You can safely refer to tremendous impressions on the web if you don’t have one at hand. We collected some reviews which we feel more objective for reference:
Note the stereoscope issue of the cable has been well fixed in our kit by using a manually braided, soft cable.
From crinacle.com on the frequency response of original Final F7200.
With the Knowles RAB 32257 BA drivers
Although using different drivers, this kit sounds surprisingly close to the kit with Sonion drivers. As you may observed from the frequency response measurement below, both kits have very close patterns in mids and highs – peaks on 3KHz and 8KHz, and valleys at 6KHz. So most impressions on FInal F7200 still apply. The major improvement from Knowles drivers is much better bass performance from high bass (<200Hz) to low bass (20~50Hz) where the kit still can output enough power – the original F7200 drops sharply 15dB.
Also see other acoustic measurement of the kit with Knowles drivers.
Know more about cables
F7200 earbuds have to work with the cable specially customized for 2 reasons: first of all, the MMCX connector must be super tiny and light weight, second, it must be 90 degree curved. The only MMCX connector meeting these requirements are those used in Radio/RF scenarios like microwave or cable TV.We build these cables with 6N OFC, silver plated and ultra soft cables with 3.5mm jack. Please contact email@example.com for any further customization requests.
How can I assure I get what is advertised in this F7200 kit?
Email to firstname.lastname@example.org if you want the original measurement of your KIT – we test the Frequency Response, Cumulative Spectral Decay, Burst and Energy Decay, Impulse Response using standard IEC 711 coupler, customized sound card and ARTA software – and we can offer both snapshot or raw data file.
OK, can I assemble it now?
Of course and proceed with caution! Following up the step by step tutorial below, you can make the kit in 1h.
Step 1: Know the components
- 2 pcs of MMCX female connectors
- 2 pcs F7200 shells, made by stainless steel
- 2 pcs of ear tips, 4.3mm inner diameter
- 2 pcs anti-dust covers, 4.3mm diameter
- 2 pcs BA driver housing (3D printed)
- 2 pcs BA drivers (KNowles RAB 32257 or Sonion 26U08/9)
- 4 pcs inner wires, 6N OFC
Step 2: Solder wires to BA drivers
See the +/- pin definition below of Knowles drivers. Sonion driver is the same.
And make sure you solder the blue wire to negative pin and red wire to positive pin.
Step 3: Glue drivers to housing
Then glue the driver to the housing. We recommend T8000/E8000/B7000 or similar instant dry glues, where you can easily find on stores nearby. And wait >30min until the glue fully dry.
Be careful not to block the tiny nozzle of the BA driver, and make sure you glue it air tight, otherwise most low bass will be lost.
Step 4: Install drivers+housing to shell
Follow following direction to push BA+housing in to the shell.
Apply some glue around the housing and glue it to the shell, Wait until the glue being dry, then put on the anti-dust cover.
Step 5: Install the MMCX female connector
Solder the blue wire to the ground pin and red wire to the positive pin, see below.
Step 6: Test and finalize
You shall test the earbuds now before the final step to make sure all previous steps being done perfectly. The best way is to measure the FR response and ensure L/R channels being fully balanced. As both Knowles and Sonion are top BA manufactures, the channel balance can be very good (variance <1dB). If you don’t have an ICE711 coupler, you can try some familiar musics to check if bass, mid and high all sound identical from L/R earbuds.
If everything OK, apply a little bit instant dry glue to the edge of MMCX connector, and slowly screw it into the shell. Then you have this nice earbuds finally.
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