xrvsmr
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Table of Contents
XR18 vs MR18
Test procedure for XR18 vs MR18 measurement.
A couple of disclaimers starting by a general statement: Measurements are done as close as possible to what would be a scientific measurement process (Configuration and tests are documented, are reproducible by a third party, tests results are published, known assumptions and limitations are mentioned as far as possible).
Also:
- Statement #1 : Measurements are done in recording studio environment. Namely, there is no control on CEM/EMI interfering with measurements apart from standard studio installation best practices in terms of proper ED grounding and shielding.
- As a consequence, comparing the results is more important that dealing with the RAW value.
- Statement #2 : One input and one output are used on each unit, there is only one interface sample. Statistically processing those measurement among several units/interface is out of scope of this measurement.
- As a consequence, these results are prone to specimen bias.
- Statement #3 : XR18 has two high impedance instrument inputs which MR18 does not have. For the sake of comparing apples with apples, Input 9 and Output 1 are used as references on both units
T1 - Inner Noise
Measure loopback RTA THD (+N) @1khz + total dynamic range.
Setup
- REW in loopback mode,
- Double shielded XLR as connection
- on both units, use In-9 and Out-1
Loopback diragram:
XR18 Measurement
-12dBfs / G=0
-20dBfs / G=0
-12dBfs / G=8dB
-30dBfs / G=18dB
MR18 Measurement
-12dBfs / G=0
-20dBfs / G=0
-12dBfs / G=8dB
-30dBfs / G=18dB
T2 - External loop comparison
Setup
xrvsmr.1718625984.txt.gz · Last modified: 2024/06/17 12:06 by wadmin