Re: 2022 Toyota Prius. Doitor's g
Ive been using headphones as reference for tonality (Audio Technica M50X and Kiwi Cadenza IEMīs), but after the seminar I decided to get a better system which will also help me practice tuning and learn.
So I just ordered some Kali Audio MM-6īs that should be here this weekend. They are the same speakers as the LP'6v2, but they also have digital inputs.
Will report back once I set them up and take them for a spin.
J.
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Re: 2022 Toyota Prius. Doitor's g
So, I couldnt pass up the anniversary sale and got a perpetual license for Smaart LE v9 yesterday.
Made two configurations.
A) 7 mic array in Geddes/Sound Power/Budiono configuration and B) 5-7 mic array all in the same plane like JL MAX does it.
Also will compare the arrays vs a single moving mic on REW.
I have some vacation time coming so expect several experiments that Ill be posting soon.
Will also be picking up my Kali Audio speakers this weekend. Woot, woot.
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J.
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Re: 2022 Toyota Prius. Doitor's g
Picked up the speakers last night.
MSRP on them is $209 each, but found them on eBay from AltoMusic in New York for $149 each with free shipping. So $324 after taxes.
Each one came with the power cord, a remote control and an XLR cable.
Attachment 18688
Said I wouldn't play with them until the next morning, but who was I kidding. LOL.
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So they have four types of inputs: two digital inputs (Coaxial and Toslink), RCA and XLR.
With the 8 dip switches you can set the DSP up for different configurations and you also select which one is the primary and secondary speaker.
Attachment 18691
The initial impression is that we are on the wrong hobby. LOL.
Just set them up in a equilateral triangle and BAM its almost magic. You get the imaging, tonality, coherence and depth that you could only dream of in a car.
Im going to measure them up later today and load some graphics.
Also plan to hook the MiniDSP OpenDRC to them to experiment before I put it in the car.
J.
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Re: 2022 Toyota Prius. Doitor's g
Quick post for the initial setup, will post a more detailed and separate thread after I finish all the tests.
Setup used consist of a Topping D10S, MiniDSP Open DRC and for measuring 7 mics with the Behringer 8 channel sound card, a MiniDSP Umik-1 CSL.
Want to compare the results with different measurement methods: single mic in the listening position, moving mic, different arrays, etc. Will also do the same measurements with Smaart v9, Open Sound Meter and REW.
This was just the setup test and will measure officially starting tomorrow. Might start another thread.
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Re: 2022 Toyota Prius. Doitor's g
First measurements with Smaart LE v9 in the car.
This is version 98763764328 of the Sound Power mic array holder.
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If you've listened to the car, this is what's going on.
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Next step is to work on that tune with rePhase and install the MiniDSP OpenDRC in the car.
J.
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Re: 2022 Toyota Prius. Doitor's g
Been tuning the car over the weekend using JL Audio's recommended Tunning method.
Im still not done, but here's a sneak peek.
Attachment 18708
m liking the tonality of my manual tune a whole lot better than Dirac's.
Still have to do the last two steps of JL's Tunning method.
Im making a PDF documenting this step by step that should be ready to share soon.
And once its done, ill throw FIR filters on top. Woot, woot.
J.
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Re: 2022 Toyota Prius. Doitor's g
Small update.
Moved the DRC from the center console into the sunglass holder.
Attachment 18712
Got the MiniDSP Open DRC up and running.
Its under the passenger seat.
Still need to make the rack to hold it in place.
Attachment 18713
Terminated the coaxial cable that goes between the Topping and the OpenDRC.
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J.
Re: 2022 Toyota Prius. Doitor's g
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Re: 2022 Toyota Prius. Doitor's g
Now that I’ve been playing with Smaart a bit more, decided to measure the effects of what the "horn" I made for the mids in the dash, was causing to the sound.
The idea behind the "horn" was to try and eliminate most of the direct sound from the speaker to try and get only reflected sound which I thought would be easier to eq, but guess what....... It doesn’t work like that. LOL.
This is the frequency response of both mids with x overs (320-3000 at LR 24 dB).
Attachment 18715
See the nasty dip on both mids from around 1.6 kHz up to around 3.2 kHz and the bump in phase.
Well, if we take into account the 1/4 wavelength of those frequencies its pretty clear what’s happening.
A full wavelength at 1.6 kHz measures 22 cm, and a 1/4 of that is 5.5 cm.
A full wavelength of 3.2 kHz measures 11 cm and a 1/4 of that is 2.75 cm.
Now why the 1/4 wavelenght is important?
Because when that wave bounces it comes back at 1/2 de original wave, which means 90 degrees out of phase which cancels those frequencies.
In my case, I’m loosing around 6-7dbīs in that range.
Solution: I’m going to take the "horns" out and get the speakers closer to the windshield, which won’t eliminate the cancelations, but should push it up into frequencies not played by those speakers.
The idea is to do that over the weekend and will report back with new measurements when it’s done.
J.
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Re: 2022 Toyota Prius. Doitor's g
Attachment 18716
From top to bottom:
Blue: With waveguide mounted under OEM location.
Green: Without waveguide mounted under OEM location.
Yellow: OEM location about 1/2" higher than the previous two. (tilted a little).
Orange: OEM location title at the rear view mirror.
Blue: OEM location tilted a lot.
Red: Touching the glass tilted.
Purple: Touching the glass.
Conclusions.
1. Mounting the speaker farther from the glass accentuates the lower range of frequencies played by this speaker, from 3 to 7db's from about 180 Hz up to 1.2 kHz.
2. The cancelation is there no matter what I do, but it is magnified by the waveguide, not because it makes the cancelation bigger, but because it boost the lower section.
3. The flatest response out of all is with the speaker touching the glass, but that's hard to keep stealth (like I want).
4. Im going to mount the speaker in the OEM location with a slight tilt which seems to be the best compromise in my car.