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While I've mostly been happy with my current car audio installation, the call of 'more tweaking' got the better of me, and I wanted a DSP. The commercial products seemed to all have either significant technical limitations, reliability issues, or poor software implementations..and were all way too expensive for what I consider my 'toy' budget. So, minidsp here I come. I've never attempted building anything electronic before..but it looked easy enough.
The current system:
Kenwood DNX691HD head unit,
Apline PDX 4.150 (4 channels for front doors)
Alpine mrv-f345 (2 channel bridged for sub, 2 channel for future)
JL audio 12W3 in a sealed box
JL audio ZR800 mid bass in the doors
Infinity perfect Kappa 5.25 component set in the doors
The plans:
I don't have enough wires into the doors (yet) to run fully active, so I'm keeping the kappas on their passive crossover. I'm also going to keep the Sub-main crossover handled in the Kenwood head unit so I can keep front seat sub boost available while I'm driving.
(2) Minidsp 2x4 boards with the miniDC power supply in one box
one to run the crossover and EQ for the front channels and the other to eq the sub.
In the future, if I do run new speaker wires from the extra 2 amp channels to the tweeters to go full active, I can split the system to be 1 minidsp per side, L/R.
I considered the 2x8 board, but it was just too large, so I've settled with the limitations of doing 2 2x4's..and the miniSHARC based system is just too much for a first timer to tackle.
Pictures:
The boards arrive.
Mounted to a laser cut steel baseplate
Layout inside the box
nearly complete
I realize that I never took a photo of the finished product..I'll add that later.
I still need to build a permanent mounting location in my trunk. I discovered that the class D amp puts out some EMF that the miniDSP will pick up if it is right up against it (which was my first plan) so right now it is just velcro'd to the carpet (hence no pictures).
So far, it seems to be working well. I have a LOT of tuning ahead of me to really dial in the eq and time alignment settings; but that is half the fun.
More images
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Description
MiniDSP UMIK-1 Omnidirectional USB Measurement Microphone
The UMIK-1 is an omni-directional USB measurement microphone providing Plug & Play acoustic measurement. From speaker & room acoustic measurement to recording, this microphone provides low noise and accurate results you can rely on. Forget about driver installation, OS compatibility and un-calibrated mics. The Umik-1 is a USB Audio class 1 device automatically recognized by all Operating Systems (Windows/Mac) and Ipad with Camera Connection Kit. It is provided with a unique calibration file based on the serial number to ensure an accurate measurement. Combined with our recommended acoustic measurement software, it is the perfect match for a plug&play measurement system.
Product Downloads
What's in the box?
- 1x UMIK-1 microphone
- 1x shielded USB cable (1.5m)
- 1x mini Tripod - Threaded for 3/8'-16
- 1x foam wind screen
- 1x padded box
How to get started?
MiniDSP have assembled some very comprehensive step-by-steps for the UMIK-1 for all sorts of applications. Please make sure to start reading our application notes to be up and running in no time!
Unique Calibration File Download
All UMIK-1 are calibrated with a unique calibration file. In addition, a unique auto-generated 90-degree calibration file for use with the nanoAVR DL is provided. To download the calibration files, look for the 7 digit Serial Number found on the body of the microphone.
1) Enter the serial number in the form below (three digits then four digits e.g. 700-XXXX).Minidsp Auto Tune Accurate Test
2) Your calibration files will automatically download in most browsers. If not, click on the links provided to manually download.Minidsp Auto Tune Accurate Chart
| UMIK-1 setup with REW |
| Using the UMIK-1 with AudioTools on the Apple iPad |
| Using the UMIK-1 with Smaart for AudioTools |
| Using the UMIK-1 with SignalScope Pro |
| Acoustic measurement with the UMIK-1 and REW |
| Loudspeaker measurement with UMIK-1 and REW |
| Using UMIK-1 with Dirac Live |
| UMIK-1 setup with Amarra |
| Using the UMIK-1 and REW with HDMI output - Windows |
| Using the UMIK-1 and REW with HDMI output - Mac |
Recommended by our Friends:
The miniDSP team built long term relationships with the following leading software applications and is proud to showcase them as our recommended software solutions:
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REW: miniDSP worked along with John Mulcahy to develop even greater compatibility for the UMIK-1 inside REW! With the latest beta release of REW (v5.01 and up), the UMIK-1 is automatically recognized by the software and prompted for use when REW is started with the microphone plugged in.
Please follow our application note for more information.
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Dirac RCS: As a well known reference in the world of room correction with countless high end audio/automotive, we're honored to have Dirac as part of our partners. Dirac RCS is available in two version (stereo or multichannel). Please consult Dirac's website for more info.
Please follow our application note for more information.
Umik-1 on Ipad: Our technical team has been testing the UMIK-1 along with few ipad apps. A plug&play setup for a full featured measurement + SPL meter running from the Ipad. Check out our application section for more info.
Please follow our application note for more information.
Amarra Symphony: Amarra Symphony with IRC is an advanced music file player for the Apple Mac platform. It includes a feature called 'Impulse Response Correction' (IRC), that corrects for acoustical errors at the listening position caused by early reflections from the speaker and listening room. It also provides the ability to tailor the response at the listening position using target curves.
Please follow our application note for more information.
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