Comparing different stereo systems in new vehicles using REW

boogts

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Hi All,

I have tried to make good use of REW for years to make the mini-dsp adjustments in my old car work better, but when it comes to new cars, how can I best evaluate, objectively, what is the best stereo before buying - other than of course just playing some songs? As in what best feeds back the output signal frequencies most faithfully?

When running the wave, I get the attached graph - done with the left, right and then left and right speakers together. Am I to assume the flatter the line, the better the speaker system? Or what tools / windows would best help. I figured this is a bit obtuse since I'm not changing up anything in the room, just want a baseline to determine a systems capabilities. Thank you!
 

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Sonnie

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My AV System  
Preamp, Processor or Receiver
Monolith HTP-1 Processor (Movies and Surround)
Main Amp
Benchmark Media AHB2 Monoblocks
Additional Amp
Emotiva XPA-Eleven
Computer Audio
Intel NUC w/ Roon ROCK
DAC
miniDSP SHD (Two-Channel Music Only)
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for movies only)
Front Speakers
MartinLogan Renaissance ESL 15A
Center Channel Speaker
MartinLogan Focus C-18
Front Wide Speakers
MartinLogan Classic ESL 9
Surround Speakers
MartinLogan EFX Surrounds
Surround Back Speakers
MartinLogan ElectroMotion ESL
Front Height Speakers
MartinLogan EM-IC
Rear Height Speakers
MartinLogan EM-IC
Subwoofers
SVS SB16-Ultra x4 (music) + PB16-Ultra x2 (movies)
Video Display Device
Epson 6050
Screen
Elite 128" Screen
Remote Control
Universal MX-890
Streaming Equipment
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The blue trace is a very nice response curve for a car... assuming you measured where your head is typically located.

Unfortunately with vehicles we are stuck with dampening material to help with resonances in the vehicle, which may or may not be measurable with a sweep... and then something like the miniDSP C-DSP 8x12 DL with Dirac Live, if you are willing to go aftermarket amps.
 

boogts

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I measured with the mic (UMIK-1) at the driver's head, yes, though that is with 1/6 smoothing.
 

Sonnie

Senior Admin
Staff member
Joined
Apr 2, 2017
Messages
3,498
Location
Alabama
My AV System  
Preamp, Processor or Receiver
Monolith HTP-1 Processor (Movies and Surround)
Main Amp
Benchmark Media AHB2 Monoblocks
Additional Amp
Emotiva XPA-Eleven
Computer Audio
Intel NUC w/ Roon ROCK
DAC
miniDSP SHD (Two-Channel Music Only)
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for movies only)
Front Speakers
MartinLogan Renaissance ESL 15A
Center Channel Speaker
MartinLogan Focus C-18
Front Wide Speakers
MartinLogan Classic ESL 9
Surround Speakers
MartinLogan EFX Surrounds
Surround Back Speakers
MartinLogan ElectroMotion ESL
Front Height Speakers
MartinLogan EM-IC
Rear Height Speakers
MartinLogan EM-IC
Subwoofers
SVS SB16-Ultra x4 (music) + PB16-Ultra x2 (movies)
Video Display Device
Epson 6050
Screen
Elite 128" Screen
Remote Control
Universal MX-890
Streaming Equipment
Roku Ultra
Streaming Subscriptions
Lifetime Roon Subscription
Tidal
qobuz
Netflix
Amazon Prime
Satellite System
Dish Joey 4K
1/6 smoothing is normal ... and closer to what you are actually hearing than what you see with non-smoothing.

Short of going aftermarket, I'd say you are doing pretty well.
 

El Duderino

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Feb 24, 2021
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Personally, if you're trying to determine the likelihood of your being satisfied with the OEM system, I'd start by testing stereo presentation with test tone tracks. If the stereo presentation is wrong, you're screwed, no matter the tonal performance. I use the Educar TestTune app (available in the iOS and Android App Stores).
 
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