A digital signal processing board with 2 inputs and 4 outputs per board. Multiple boards can be connected to make as many output channels as you want.
|MiniDSP is a flexible, low cost product concept designed to fit a wide range of audio processing applications in a 3"x3" package. With its stackable architecture, it is the perfect fit for your DIY audio projects, custom loudspeakers or Pro-A/V custom applications. May it be the on board unbalanced inputs (2) & outputs (4), one of our stackable I/O card or even your custom I2S interface, our miniDSP kits give you the freedom you've always been looking for. Mix & Match the I/O configuration you need, stack it up and build the unique system that fits your needs!|
Note there are two versions of this board:
Rev A = 0.9V input
Rev B = 2.0V Input
For car application, you’ll want the Rev B version if you have a headunit with a high pre-out voltage. Otherwise you’ll clip the inputs. This may seem like a huge concern when looking at the numbers, but read the “Concerns” section of this review to see my findings on the matter.
The next step is a DSP board which uses optical inputs and outputs known as the miniDIGI:
The other option is the miniAMP which is about the same size as the DSP boards listed above, and serves as a class D amp pushing out 4x10w @ 4 ohm or bridged for 2x20w @ 8ohm.
Who makes it:
A company out of Hong Kong, called miniDSP.
Here’s t heir website:
Don't be concerned about this. Shipping took less than a week to reach me from Hong Kong.
What does it do:
Well, I think the real question is what can’t it do.
This processor is a standalone board with the ability for multiple options of DSP. So, you can order the board and the software separately. The software is called a “plug-in”. They offer a wide range of various plug-ins varying form a simple 2.1 stereo w/sub setup to a 4-way P-EQ plugin which allows you to have 6 channels of parametric eq per input (2) and output (4).
The cool thing is that the company is always updating their plug-ins, and you get the upgrades for free. Once you pay for one version of the software, you’re future proofed.
For more information on their plug-ins, see this link:
You have many, many options with these guys. In fact, if one wanted, they could have 31 bands of graphic eq + 6 bands of parametric. This would be a great solution for those who want the ability to focus and fix particular problems with a parametric equalizer and then shape the overall output with a 31 band graphic equalizer.
The best part about the parametric is the ability to have a Q (bandwidth) as wide as 0.5 or as narrow as 50. That’s insane!
Beyond the EQ capabilities, here's a run-down of the other standard features:
- Time Alignment in 0.02ms increments
- Phase Flip (0/180)
- Channel muting
- Linkwitz-Riley with slopes of 12, 24, and 48dB/octave slopes
- Butterworth with 6, 12, 18, 24, 30, 36, 42, and 48dB/octave crossovers
- Bessel crossover (fixed slope)
- Individual channel input/output gains with attenuation of up to -70dB
- Bypass: You can bypass the crossovers, or EQ to compare the changes you've made to what it sounds like without those changes
- Levels of Equalizer is ±16dB
- Equalizer Types can be standard (Peak) or High or Low shelf.
Yea, yea, that's nice. But how much does it COST!?
Each board runs only $100 and each plug-in costs only $10. One could have an 8-way setup with both graphic eq and parametric eq for $220+shipping!
Here are some pictures of the product. What you get when you order one of these boards is a 4.5’ usb cable, a set of RCA cables, and standoff posts.
The following pictures are for you EE gurus out there. I won’t say anything about this stuff.