Long Time miniDSP supported Daniel (Curryman) is back from his Teufel Speaker building competition with some great report! Some neat update with great measurement on this PWR-ICE project. See below some update we've received from Daniel. You can follow up his progress from his thread on miniDSP forum as well. 


 

Hello all,

finally – after quite some time :whistle: - the Teufel competition speakers found their way to my home.

While those speakers did not win the competition :dry: the Bass performance was among the best. However the mid to high range was not further optimized compared to the original Teufel speakers and another speaker won the overall sound quality evaluation.

Therefore my friend implemented the passive crossover (remember: Woofer – Mid – High crossover is passive and only Sub to Woofer crossover is done with the DSP) of the best rated speaker B)

I did some measurements in my living room (low frequency resolution due to time windowing) with Umik-1 + REW:

Woofer – Mid – High Frequency Response 1m, 15 Degrees, 1/6th octave smoothing, 3,3ms window:

pic1

(nice addition with -6dB crossover points, the dip at 2.8 kHz is by design to take care of total radiated sound power, woofer seems too loud but that’s also due to the measurement setup).

Nearfield Measurements of Subwoofer + Woofer (note the lower cutoff frequency of 20 something Hz J ):

pic2

Overall in-room frequency response (both speakers) after some slight PEQ using the DSP:

pic3

A first listening test with some friends (yes, it’s Christmas time J):

pic4

I am very satisfied with the sound of these speakers. Deep and well controlled bass, very detailed mids and highs and very natural sounding, yet powerful if needed. No coloration and good for long term listening fun. All in all a really nice project and a really good example for a nice PWR-ICE125 implementation. Using the Input PEQ it’s really easy to integrate those speakers into any room J

pic6

Unfortunately Teufel does no longer sell those speaker kits but maybe this project can be inspiration for other similar projects. At least I am working on another speaker project (hopefully it does not take that long :ohmy: ) : A two way active monitor with Seas ER18RNX + Monacor DT300 in Waveguide using the PWR-ICE125 module.

Kind regards, Daniel

Dual sub integration using the MiniDSP

This very comprehensive tutorial was written by community member Neutro on AVSForum. We're very fortunate to see dedicated members taking the time to write a great step by step like this one.
To those of you who have ways/ideas on a little tutorial, make sure to send it to us. And once again a big "Merci" to François!


The goal of this thread is to discuss a handful of topics regarding the integration of one or more subwoofer, using a MiniDSP 2x4, to your average home theater setup. While the MiniDSP is a great platform to perform subwoofer equalization, this won't be discussed here in detail. Rather, I want to focus on how to:

  • Perform the actual connexions and setup of the MiniDSP and subs in the system
  • Use the MiniDSP as a splitter to simplify the setup for multiple subwoofers
  • Easily level-match multiple subs using the MiniDSP
  • Tweak the sub integration with the mains using the MiniDSP
  • Add a house curve on top of whatever EQing is performed by the AVR

Gear

The required gear for this tutorial is simply:

  • An AVR
  • Up to four subwoofers
  • An appropriate number of subwoofer cables
  • A MiniDSP 2x4
  • A MiniDSP plugin

[readon url="http://www.minidsp.com/support/community-powered-tutorials/201-dual-sub-integration"]Read More[/readon]

 

Dear All,

With a growing community and many more things to come in the upcoming weeks it's about time for us to build a little blog summarizing it all!

Expect some little updates from our engineering team, some highlights on some neat projects from our community members and other bits of info you might want to know. Have some neat community project you want to share? Send us more info so we can share it on this blog.

For now, have fun with your DSP hobby wherever you are!

Tony RougetMD @ miniDSP Ltd

Community member "Soldermizer" wrote a very neat application note on DIYAUDIO.COM on how to use every possible biquad (PEQ or LPF/HPF) to make the most out the platform! Check out this great application note now hosted here.

Thanks again for sharing this neat tutorial with the community!

PEQ example

Our long time community member Daniel just brought his miniDSP setup to FrickelFest 2013 in Germany for a demo. A great post here summarizing his neat setup! Thanks again for sharing. :-)


Dear all,
I just came back from the Frickelfest 2013. It was a really nice event with lots of impressive DIY gear, intensive discussions with friendly people and (to be honest) quite some beer and wine ;-)
This year me and my friends showed our DSP based setup using the miniSHARC to crossover and EQ our Frickelfest Speakers (old Naim SBL woofer in TQWT + Monacor DT300 with waveguide). Sources where vinyl from DIY turntable and Flac using labtop + miniSTREAMER and amplifiers where a SymASym for the woofers and a Hybrid Valve+MOSFET for the tweeters.

Here is a picture of my actual miniSHARC setup with my own ES9023 based DACs (6ch out):

miniSHARC setup with my own ES9023 based DACs

As a preparation we first had to measure the speakers:

Speaker measurements

The SPL vs. frequency of the raw speakers (mic was calibrated for frequency response but not for SPL):

Amplitude and Frequency

I used the IIR Filters for crossover and FIR Filters generated by RePhase to linearize amplitude and phase (great tool!). Here is the result after 3 hours:

amplitudenfrequenzgangphasengang.jpg



Thanks to the corrected phase the summing of woofer and tweeter is quite perfect:

amplitudenfrequenzgangeinzelsumme.jpg



Also the step response looks quite good (overall inverted but that shouldn't be a problem ;) ):

sprungantwort.jpg



Thanks to the waveguides the horizontal directivity of the speaker looks very good:

richtcharakteristik.jpg




Here is the system playing at the Frickelfest (forgot to take a better picture since I was always listening to the music :woohoo: ):

Final set up

Unfortunately I killed the miniSHARC after one day by opening and connecting the wrong plugin (2x8 plugin, DevTeam already helped me to bring it back to live! Thanks a lot!) and we had to switch over to miniDSP 2x8 which wasn't bad at all either ;)

Have fun, Daniel