Westone Audio ES70 vs. MACH 70
This is going to be a short one… Shorter than I anticipated, to be honest.
Today, I am going to share with you my personal impressions of the newly announced Westone Audio MACH 70 compared to the custom ES70 IEM.
Comparing the shells
First and foremost, the ES70 is custom fit IEM (CIEM), so the shell size is the same as the ear’s concha. The MACH 70 on the other hand is a universal fit IEM, and the shell size is relatively small.
Comparing the cables
The MACH 70 comes stock with the UltraBaX T2 cable, while the ES70 comes stock with EPIC MMCX cable. Both cables feel very high quality, and both (unfortunately, IMHO) terminated with a 3.5mm plug. Connector wise, the T2 is mechanically superior to MMCX, and I wonder if Westone Audio would switch to T2 for the ES line as well at some point...
Sound test setup
For all my testing and comparisons - I used my FiiO M11 DAP, which I believe is very neutral.
Since both IEMs are very sensitive – it helps when the source has a very low noise floor. In fact, I could not hear ANY hiss of noise floor with either IEM driven by the M11.
All test tracks are lossless FLAC files stored locally (microSD card) on the M11 DAP. No streaming. Lastly, the M11 was set to high gain.
Ease of driving (or power requirement)
Both IEMs are very
easy to drive:
- MACH 70 – sensitivity is 110dB @ 1kHz and impedance of 42 Ohms.
- ES70 – sensitivity is 115 dB SPL @ 1mW and impedance of 39 Ohms.
Due to high sensitivity – source used should be quiet (low noise floor). Source power is of no consequence here, IMHO.
In my MACH 60 vs. MACH 70 writeup, I had the following introduction:
Well… in the case of ES70 vs. MACH 70 – it is the exact opposite! (and is the reason for this post being so short)
My conclusion here: Westone Audio MACH 70 is the universal version of the ES70.
To my ears, those 2 IEMs are tuned the same. Now, due to fit and seal (especially with the universal MACH 70), and small variances that could occur due to different tips – there could be small sound differences. If there are – they are very subtle and could change by changing tips for achieving a better seal.
Personally, I really like the tuning of the custom ES70. Up until now, there was no universal fit IEM that is tuned the same. Now – there is!
To experience the MACH 70 (and the rest of the MACH series) – stop by Westone Audio’s table at NAMM Show (June 3-5 in Anaheim), CanJam Chicago (June 18-19) or join the launch tour