Wavelet Design OPUS1 (IEM)

Measurement

DBA Technology 

OPUS 1 uses one custom-made full-range 'Dynamic BA' driver in each earpiece fitted to an ergonomic housing. 

This 'Dynamic Balanced Armature' is made by their own technology.

 U.V coated housing

Perfect fit by ergonomic design

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Wavelet Design OPUS1 Measurement 

Raw

Diffuse Field Target Compensated

Olive Welti Target Compensated

CSD

Harmonic Distortions

94 dB @ 500 Hz

Distortions over 1% below 1kHz

They explained that the DBA performs low distortion sound by using their custom made BA. 

Actually as shown in the measurement data, DBA's distortions are quite high, compared to other conventional BA earphones.

Impedance magnitude 

Effect of adding a resistor

Black : 0 ohm

Orange: 10 ohm

Blue : 30 ohm

Green: 90 ohm

Pink : 300 ohm

Insertion depth

• Black:4.8 mm

• Green: 6.8 mm

• Red : 8.8 mm

Away from the reference plane

Difference between OPUS1 and ER-4P

• Black: Wavelet Design OPUS1

• Pink: Etymotic Research ER-4P

THD - 94dB SPL @ 500Hz

• 1.2% at 713.6Hz

THD - 100dB SPL @ 500Hz

• 2.7% at 713.6Hz

They also explained that this DBA works stable at the high output. 

However, as the same problem occurs in the conventional BA, its distortion also increases at high volume.

Resistor added

Diffuse Field Target Compensated

• 90 ohms resistor added

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※Serial No.55 and No.65

Wavelet Design uploads measurement data on their own blog.

http://blog.naver.com/waveletd

According to their data, differences among each units are quite big(Almost 10 dB).