Introducing Hollis Audio Labs

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HAL

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Introducing Hollis Audio Labs
« on: 6 Apr 2016, 02:32 pm »
Hello from Hollis Audio Labs, LLC. 

Been on AC for many years and started building PC Music Servers for customers.  The latest version is the MS-3 PC Music Server.  That has branched out to include the Danville Signal Processing, Inc. dspMusik 6x8 DSP and HiRez DAC for doing speaker digital crossovers for multi-amp drive.

Will be discussing ideas for DIY speaker designs that use the dspMusik 6x8 digital crossover and uses to replace the Behringer DCX2496, MiniDSP and DEQX. 

In the case of the dspMusik, it will be bundled with an MS-3 for loading and control purposes if the user wants variability of crossover and volume levels.  If the customer only needs the digital crossover, it can be programmed for standalone use with the speakers with analog, USB and Coaxial inputs.

Here is the thread where the MS-3 Music Server and dspMusik digital crossover are being discussed. 

http://www.audiocircle.com/index.php?topic=132170.0

Will be posting new products and the DIY speaker ideas in this thread.  Hope folks find the projects interesting.

 

HAL

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Re: Introducing Hollis Audio Labs
« Reply #1 on: 6 Apr 2016, 02:51 pm »
To start with a speaker project, will repost the latest progress on the open baffle line array FPS driver baffle.

Here is the picture of the baffles before attaching the side wing and FPS drivers.  The next set of FPS planars arrives today and the speaker wire arrives tomorrow to do the buildup.  There are 20 modified ChipAmp channels to drive the individual planar drivers from the dspMusik beamforming DAC outputs.



HAL

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Re: Introducing Hollis Audio Labs
« Reply #2 on: 6 Apr 2016, 03:00 pm »
Will also keep a list of speakers that already have dspMusik digital crossover designs done:

VMPS RM50 for two way operation with subs
VMPS RM40 for two way operation with subs
VMPS RM40 for three way operation with subs

Magnepan 3.6R with subs

Sanders 10C and 10D electrostatics

GR-Research N2X with subs

HAL open baffle planar with BG NEO3PDR and BG NEO10 planars with servo subs

Digital crossovers in work:
AV123 LS-9 two way crossover with bass management
« Last Edit: 7 Apr 2016, 01:35 pm by HAL »

S Clark

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Re: Introducing Hollis Audio Labs
« Reply #3 on: 6 Apr 2016, 03:31 pm »
It will be interesting to hear how the FPS drivers work out for you.  Aren't they both low efficiency and low power handling?  Of course, in an array that may not be an issue. 

HAL

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Re: Introducing Hollis Audio Labs
« Reply #4 on: 6 Apr 2016, 03:45 pm »
Scott,
Yes the FPS planars are 82dB/1w/0.5m sensitivity, and about 7.5watts rms power handling per driver.  They were designed for desktop PC use.  The array should be 10 of them to work with the beamformer idea that should increase the sensitivity and minimize ceiling to floor interactions as well. 

Will see what happens once I get the drivers and install them.  At least all the amps are working to drive them.  Can only implement six drivers per side at this point due to the limit of 8 channels from the dspMusik 6x8 and needing two channels for the servo subs. 

HAL

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Re: Introducing Hollis Audio Labs
« Reply #5 on: 6 Apr 2016, 05:04 pm »
Another area to explore is the latest Raspberry Pi 3 with Windows 10 IoT running for audio.  Will be interesting to see what it will do with that OS.



HAL

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Re: Introducing Hollis Audio Labs
« Reply #6 on: 6 Apr 2016, 08:09 pm »
Posting this update from the Raspberry Pi3 web browser.  Should make a great small remote control for the MS-3 Music Server. 

The FPS drivers arrived, so will start installing them and wiring them up tomorrow when the Belden cable arrives.

Avoosl

Re: Introducing Hollis Audio Labs
« Reply #7 on: 6 Apr 2016, 09:56 pm »
     Most promising, indeed.  For those of us without i[Pods, Pads, XXX], Raspberry also makes available through associates a 7" touch-screen monitor for about $60 which would make from-the-seat control of the MS3 cheap and easy.  There may well be many others equally cheap.  I noted a raft of good things from the Raspberry site.  All this should render the music server concept realizable for "the rest of us".

     By all means keep testing this out.

Odal3

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Re: Introducing Hollis Audio Labs
« Reply #8 on: 6 Apr 2016, 10:09 pm »
Congratulations on your new circle. Been following along on your buildthread of the massive h frame towers. Looking fwd to read more about your projects!

HAL

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Re: Introducing Hollis Audio Labs
« Reply #9 on: 7 Apr 2016, 12:27 am »
Thanks for that.  Glad you enjoyed the servo sub build.  Will be posting lots of ideas as they come.

Here is the Raspberry Pi3 running the stock Linux OS for trials.  Second picture is the web browser in action. 





HAL

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Re: Introducing Hollis Audio Labs
« Reply #10 on: 7 Apr 2016, 10:44 am »
Got Rune Audio running on the Raspberry Pi3 last night and will be trying it out with DAC's and my music library on SSD to see what happens. 

Will be trying my Meridian Explorer2 DAC with the MQA demo files along with other HiRez music.



HAL

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Re: Introducing Hollis Audio Labs
« Reply #11 on: 7 Apr 2016, 05:49 pm »
FPS planar drivers and Belden cable are here. Time to build some line arrays!

HAL

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Re: Introducing Hollis Audio Labs
« Reply #12 on: 8 Apr 2016, 12:43 am »
First open baffle line array right side ready for planar drivers.



HAL

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Re: Introducing Hollis Audio Labs
« Reply #13 on: 8 Apr 2016, 09:19 pm »
FPS planar drivers installed and screws started. Need a new #1 Phillips screwdriver bit as the old one is done. Then build the left baffle, install the drivers and wire both arrays to the amp modules.



S Clark

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Re: Introducing Hollis Audio Labs
« Reply #14 on: 8 Apr 2016, 10:31 pm »
Aww, Rich, you tease!  To get that close and not finish it up- use some chewing gum, scotch tape, something!  Slap those last drivers in there and give us the measurements!!

HAL

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Re: Introducing Hollis Audio Labs
« Reply #15 on: 8 Apr 2016, 11:51 pm »
Scott,
Waiting until my new Pocket CLIO arrives tomorrow for measurements.  This is really cool!


S Clark

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Re: Introducing Hollis Audio Labs
« Reply #16 on: 9 Apr 2016, 12:09 am »
Pocket Clio??? My ears just perked up. 

HAL

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Re: Introducing Hollis Audio Labs
« Reply #17 on: 9 Apr 2016, 12:22 am »
Take a look at the Audiomatica website.  Works with any Windows OS out there and give 48KHz bandwidth for measurements.


« Last Edit: 9 Apr 2016, 03:45 am by HAL »

HAL

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Re: Introducing Hollis Audio Labs
« Reply #18 on: 9 Apr 2016, 12:10 pm »
As of this morning, Parts Express now offers the BG NEO3W, NEO8 and NEO10 planar drivers again.  This has been in the works for months from phone calls with them.

I have sent questions about if the BG NEO3PDR version will be available as well.  If so, then a new DIY project might be in order. 

This might get interesting!!!

EDIT:  If it get's built, I will call it the Megalith line array.   :D
« Last Edit: 9 Apr 2016, 01:57 pm by HAL »

HAL

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Re: Introducing Hollis Audio Labs
« Reply #19 on: 9 Apr 2016, 02:02 pm »
Have the Netbook PC running Windows 10 64bit version and will be picking up Pocket CLIO soon. 

Then get it setup to try some measurements with the line array and ChipAmps.