This is a replication of Etymotic Research ER4P/S Extended Range in-Ear Monitors, a legendary of single BA IEMs, proudly made by earphone DIY Labs and save you 70% budget!
The kit is build on identical Balanced Armature Driver – Knowles ED29689 and 100% grantee the sound style/quality being identical to original ER4P/S.
Note we build this IEM per order, so please allow 3~4 days lead time before shipping.
Note we are developing DIY kits which you could use and build your own ER4P, please keep an eye on us!
How does this ER4P sound?
Ultra-high resolution! And literally you can refer to most ER4P/S impressions, because they’re built with exactly same BA driver! (background knowledge: unlike dynamic drivers, balanced armature drivers is fully sealed. So the sound quality is solely determined by the BA driver, the acoustic design has minor impact). Here is a reference from Head-Fi:
What’re in this DIY KIT?
- 1 X ER4P (optimized for portable) or ER4S (optimized for personal studios) – choose from order options
- 2 color options – crystal or black
- 1 pairs of ER4P original ear pads
Note, we save the original ER4 connectors (easy broken in daily use) to offer you best durability.
ER4P/S in Crystal
ER4P/S in Black
How if I have special requirements?
Please leave your requirements in the ordering note and we’ll handle them accordingly, or contact our service account for any issue.
Collected from hundreds DIYers building this kit.
[FAQ 1] How does this kit compared with the IE800 kit?
A: IE800 is better on ultra-low bass performance, like 5~10Hz which you can feel with you skin. While ER4 P/S and most BA drivers can not do that due to the size of its diaphragm. However, ER4 offers better resolution and fantastic female vocal. So it’s really depends on your flavor. And as both perform super great, the gap is tiny and barely perceptible.