Hollis Audio Labs

Hollis Audio Labs High End Music Servers and Custom DSP Services

05/31/2020

Very sad to have heard today that Albert Von Schweikert has passed. Still have Von Schweikert Research VR-4,5 and VR-8 speakers from when the company was in Watertown, NY. Always good to catch up with him at audio shows in those days.

My condolences to Albert's family and friends.

Just received the formal announcement that HAL has received the Al Stiefel Room for RMAF2020.  It will now be RMAF2021 i...
05/21/2020

Just received the formal announcement that HAL has received the Al Stiefel Room for RMAF2020. It will now be RMAF2021 instead of this year. Thanks to both Marjorie and the Colorado Audio Society for the vote to exhibit at the show!

Hope to see everyone at RMAF2021 in room 7102 for some music listening! Dates shown are 8-10 October, 2021.

05/19/2020

Just received word from RMAF that RMAF2020 in October has been cancelled due to COVID-19.

Hope to see everyone in 2021.

The dspNexus 2x8 now setup with the crossover for The Monoliths speakers.   Using the bottom 3x12 of the 6x12 servo subs...
05/08/2020

The dspNexus 2x8 now setup with the crossover for The Monoliths speakers. Using the bottom 3x12 of the 6x12 servo subs with the planar baffles on stands.

Time to listen to some music!

04/30/2020

Just received word that the AXPONA 2020 show has been cancelled.

The production dspNexus 2x8 chassis front panel is installed.  The dspMusik 2x8 and dspMusik 2x16 in comparison to the d...
04/25/2020

The production dspNexus 2x8 chassis front panel is installed.

The dspMusik 2x8 and dspMusik 2x16 in comparison to the dspNexus 2x8 system.

04/14/2020

Just read today that Art Dudley of Stereophile magazine has passed due to cancer.

Art did the first in room online review of The Monolith's speakers at CAF2018. Always enjoyed his reviews and when he had Listener Magazine.

RIP Art and thank you for your insights to audio gear over the years.

The dspNexus 2x8 prototype system is now running The Monoliths speakers with the bottom half of the 6x12 servo sub array...
03/18/2020

The dspNexus 2x8 prototype system is now running The Monoliths speakers with the bottom half of the 6x12 servo sub arrays.

For this listening, the AKM AK4499 DAC's are driving the BOSC amps for both the BG NEO10 midrange and GR-NEO3 tweeter planars and the AK4493 DAC's are driving the Rythmik HX300 servo subs.

Getting the levels adjusted and so far very good sound quality!

The Danville Signal Processing dspNexus 2x8 prototype is here and making music.  Unit has two new AKM AK4493EQ and two n...
03/13/2020

The Danville Signal Processing dspNexus 2x8 prototype is here and making music. Unit has two new AKM AK4493EQ and two new AK4499 DAC boards installed. The ADC is the great sounding AK5397.

Starting with the new headphone amp capability using Windows 7 and Audio Weaver for first testing. Using my HiFiMan HE500 headphones and sounding very good and no problem with plenty of headphone drive.

A new HAL MS-5 Music Server running Windows 10 is built and getting loaded with software to run the dspNexus 2x8 for the testing with the Monoliths and Magnetar speakers.

This chassis is only for the prototype. Production units will have a new style of case similar to the one from the AXPONA2019 show.

03/09/2020

AXPONA2020 has been postponed until Aug 7-9 2020 as of the webpage today.

Will be monitoring the situation to still try and attend both AXPONA2020 and RMAF2020 if possible.

Here is what the modified setup looks like with The Monoliths planars on stands and 6x12 servo subs.Two Orchard Audio BO...
03/07/2020

Here is what the modified setup looks like with The Monoliths planars on stands and 6x12 servo subs.

Two Orchard Audio BOSC amps are driving the GRNEO3 and BG NEO10 per side with the bottom 3x12 of the OB sub stack being run with the HX300-12OB servo amps.

03/07/2020

The Monoliths demo with the 3x12" OB servo subs is finished and he enjoyed his time with the modified system. He had heard the original The Monoliths system at CAF2018

Think his Sonus Fabers have found a new pair of OB servo subwoofers.

He wants to hear The Megaliths when I have them running with the 6x12's! :D

Getting ready for AXPONA2020 17-19 April in the Danville Signal Processing room 358.The Monoliths speaker system and HAL...
02/29/2020
AXPONA - Audio Expo North America

Getting ready for AXPONA2020 17-19 April in the Danville Signal Processing room 358.

The Monoliths speaker system and HAL MS-5 Music server will be their for listening demos with the latest version of Danville Signal Processing's dspNexus system.

Hope to see folks at the show for some listening.

https://www.axpona.com/

See and hear the world's top audio brands reveal their latest and greatest gear in over 200 listening rooms.  Experience your music like never before!

02/06/2020

My stock of pairs of BG NEO10 planars are now sold.

HAL will be at AXPONA2020 in the Danville Signal Processing room 358.   The show is April 17-19 in Schaumburg, IL.  Here...
02/05/2020
AXPONA - Audio Expo North America

HAL will be at AXPONA2020 in the Danville Signal Processing room 358. The show is April 17-19 in Schaumburg, IL. Here is the show information:

https://www.axpona.com/Default.asp

The HAL MS-5 Music Server will be driving the dspNexus 2x8 DSP crossover and HiRez DAC system. This will be the production system running the amps directly to the speaker drivers.

Stay tuned for the speakers to be demoed in the room for the show.

Join music lovers and audiophiles from around the world as they descend upon the nation’s largest showcase of manufacturers and retailers ever assembled in one venue – only at AXPONA.

01/20/2020

The four Rythmik Audio HX300-12OB servo amps are now connected to the two 6x12 OB Servo Sub towers. Spent the afternoon dialing in the amp gains to the Orchard Audio BOSC amps on the Magnetar speakers.

Hugh sound field and low end to shudder the air mass in the room.

Now will be interesting when the new open baffles for the Magnetar's are ready for testing and final measurements.

The two Rythmik Audio HX800-12OB amps are out of the system and getting packed to go to their new owner.

01/20/2020

Got an MS-3 back that was not powering up for a customer. After testing, the mSATA 60GB SSD drive was bad and preventing power up.

Put in a new 120GB mSATA SSD and reloaded the OS, updates and programs. Everything now working correctly. Will be heading back to its owner this week.

Keeping the music going!

01/18/2020

The last two Rythmik HX300-12OB servo amps are here and wired to Speakon connectors to connect to the 6x12 servo subs drivers.

The two HX800-12OB servo amps are being removed and the four HX300-12OB servo amps installed. The extended response to 200Hz for the 6x12's now meets up to the low end of the Magnetar speakers.

Will get them connected and running tomorrow after removing the HX800 amps.

The Orchard Audio BOSC GaN amps have arrived.  Will be setting them up the Magnetar open baffle planar speaker for liste...
01/13/2020

The Orchard Audio BOSC GaN amps have arrived.

Will be setting them up the Magnetar open baffle planar speaker for listening trials.

01/11/2020

The Orchard Audio BOSC Class D monoblock amps will ship today. Should have them early next week to test out with the Magnetar planar speakers.

The last Rythmik Audio HX300-12OB servo amp was also shipped so will be interesting to test the Magnetar speakers with the 6x12 OB servo subs.

01/09/2020

The Orchard Audio BOSC monoblock amps ship Wednesday, 15 Jan. Should have them early the next week.

The Magnetar speakers are ready to connect with 1.5' of speaker cable. That gave the earlier BG NEO10 drivers a very immediate sound that is life like.

This is going to be very interesting.

01/04/2020

Will be finishing The Megaliths line array 6x12 OB servo sub amp conversion to Rythmik Audio HX300-12OB units once the last one arrives.

These replace the HX800-12OB amps that were originally used. They will be for sale once the new amp arrives and is installed.

12/25/2019

Merry Christmas and Happy Holiday's to everyone!

Time for eggnog and Christmas tunes.

12/04/2019

Latest news is that the updated dspNexus motherboard and DAC boards have been built and new prototype in build to send for testing with The Magnetar speakers.

Hope to see this Jan 2020 for listening trials.

The Magnetar OB speakers's can be stand mounted to separate them from the servo sub cabinets.  As in this picture with t...
11/27/2019

The Magnetar OB speakers's can be stand mounted to separate them from the servo sub cabinets. As in this picture with the servo subs near the front wall and the planars in more optimal spots for the mains.

Getting some ideas for grill cloth to form fit it to the speaker baffle.

The next generation open baffle planar speaker begins.  Meet the Magnetar open baffle planar wide range speaker.Have bee...
11/24/2019

The next generation open baffle planar speaker begins. Meet the Magnetar open baffle planar wide range speaker.

Have been working with a new push-pull planar driver that is designed for open baffle use. Using a test folded baffle design, and doing the digital crossover with the dspMusikLCD 2x8, this is the farfield response in my room with first reflections removed. Adding in some first reflections goes down to 200Hz for crossover to the 3x12" servo subs wing the Rythmik Audio HX300-12OB servo amp and GR-Research 12" OB servo subs..This is not a speaker sensitivity measurement calibrated to 2.83V output.

The frequency response is +/-2dB form 300Hz to 22KHz and will be better than that at the low end. The driver specs are 103dB/1w/1m on a standard test baffle.

Will be working on the production baffle and working with the new dspNexus digital crossover as they become available. These will not be DIY kit speakers as The Monoliths are.

The initial listening sessions are these will be a force to recon with!

Fun with materials.Did some comparison plots of the impulse response measurements with the test setup of samples sent by...
11/19/2019

Fun with materials.

Did some comparison plots of the impulse response measurements with the test setup of samples sent by Peter.

First is the comparison of MEDEX and Ranger Board, The second is the comparison of MEDEX to MEDEX with CAE VB-2 constrained layer damping material applied.

Constrained layer damping needs more investigation.

Modified the impulse response test setup for more stability for the solenoid.  That made the measurements a lot more sta...
11/18/2019

Modified the impulse response test setup for more stability for the solenoid. That made the measurements a lot more stable.

Measured all the samples Peter sent and will be posting response graphs as I get them ready. There are a lot of them! :D

Have the impulse response test setup running and the CLIOwin 8.51 Standard system calibrated.  The sensitivity of the ac...
11/16/2019

Have the impulse response test setup running and the CLIOwin 8.51 Standard system calibrated. The sensitivity of the accelerometer is being corrected by the system.

Now to get the impulse generator working and do some trials with MDF to see what the system finds for response.

Some pictures of the test setup and measurement system.

The 6x12 H-Frame OB servo subs are being swapped from two HX800-12OB servo amps to four HX300-12OB servo amps.  Slightly...
11/04/2019

The 6x12 H-Frame OB servo subs are being swapped from two HX800-12OB servo amps to four HX300-12OB servo amps. Slightly less power but the crossover controls match up better for my crossover design.

Amp #3 just arrived and amp #4 will be ordered soon. The first two HX300-12OB servo amps are already running the lower 3x12 portion of each 6x12 servo sub.

The two used HX800-12OB servo amps will be available for sale once this is completed.

Just setup a system for my nephew at his place.  He wanted to play lp's, so time to break out the spare Oracle Delphi MK...
10/26/2019

Just setup a system for my nephew at his place. He wanted to play lp's, so time to break out the spare Oracle Delphi MKI table, SME Series III arm and Shure V15-VMR cartridge.

Emotiva Integrated amp driving a pair of AV123 X-LS speakers in piano gloss rosewood finish.

Hope he gets many years of enjoyment from the system.

Just took inventory in the parts storage area and I have 12 BG NEO10 planars available.If someone wants to build a Line ...
10/23/2019

Just took inventory in the parts storage area and I have 12 BG NEO10 planars available.

If someone wants to build a Line Force Speaker, I will sell the set of 12 for $3000.00+shipping+PayPal fee if interested.

A pair of Super-7's is also possible for 8 for $2000.00+shipping+PayPal fee.

That leaves 4 for 2 pairs of The Monoliths/Super Mini's.

I will only sell them as pairs or multiple pairs.

PM me for information.

BG NEO10 sale:I have 5 pairs of BG NEO10 drivers in original packing that I purchased from Parts-Express.Will sell pairs...
10/16/2019

BG NEO10 sale:

I have 5 pairs of BG NEO10 drivers in original packing that I purchased from Parts-Express.

Will sell pairs for $500.00+shipping add 4% for PayPal.

If someone wants 4 pairs for Super-7's, that is fine, will sell the other pair for Super Mini's.

Sign up here if interested.

10/15/2019

Just installed the latest version of MathAudio RoomEQ on the laptop. Had it acoustically measure the laptop speakers and make a correction.

Now get to listen to music on the laptop with speaker correction.

New Windows 10 laptop has an i5 processor and uses at 6% of the CPU. No slow down of everything else running.

Address

Callaway, MD
20620

Alerts

Be the first to know and let us send you an email when Hollis Audio Labs posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Hollis Audio Labs:

Videos

Nearby non profit organizations


Other Callaway non profit organizations

Show All

Comments

Any hint on pricing for the DspNexus?
Excellent showing at the Capital Audio Fest today! I had a very short list of favorites from the show, and you guys made that list !