The Megaliths open baffle line array speakers

THROWBACK · « **Reply #240 on:** 18 Nov 2017, 01:52 pm »

Dang, Rich! You're a 12-year-old kid again (but with a beard). What a terrific project!

HAL · « **Reply #241 on:** 18 Nov 2017, 04:28 pm »

That is the plan. Do what I want and see what happens.

HAL · « **Reply #242 on:** 18 Nov 2017, 06:30 pm »

Acquired the correct balanced Y XLR splitter cables for the prototype setup with the 8 channel dspMusikLCD and getting the amps connected. It was easy with the ChipAmps as I had the XLR Y's built in.

Amp connections continue and wire paths straightened to make easy cable runs to the dspMusikLCD and line arrays.

HAL · « **Reply #243 on:** 18 Nov 2017, 11:37 pm »

After 2 days of work with my friend Avoosl, the 10 Parasound A23 amps are installed and making great music. There is no strain ever on any volume level for replay. The system is not even done and it sounds really good!

Here are some first pictures of the system after removing the ChipAmps and installing the A23's.

Thanks go to Avoosl and Richard Schram at Parasound who have helped greatly to get this speaker system to the next stage of existence.

If anyone does not believe DSP crossovers can sound better than a great passive version, they should hear these speakers. That can be arranged!

HAL · « **Reply #244 on:** 19 Nov 2017, 03:33 am »

Quote from: THROWBACK on 18 Nov 2017, 01:52 pm

Dang, Rich! You're a 12-year-old kid again (but with a beard). What a terrific project!

Chuck,
For some statistics, the ribbon tweeters have 400 watts rms, Class A/B, the midranges have 1200 watts rms, Class A/B and the servo subs have 800 watts rms, Class D per side! That is a total of 4800 watts rms of power with headroom that never gets reached. That is the equivalent of 6.4 horsepower of drive. All being driven by the dspMusikLCD as the entire front end with the MS-3 as the Music Server. The ADC modules are very clean indeed!

Having a lot of fun listening to this!
Rich

Phil A · « **Reply #245 on:** 19 Nov 2017, 01:44 pm »

Rich - those speakers are really starting to look scary - reminds me of an old sci-fi movie 'Kronos.'

HAL · « **Reply #246 on:** 19 Nov 2017, 02:27 pm »

Phil,
Loved that movie!

I like scary!!!

Rich

HAL · « **Reply #247 on:** 27 Nov 2017, 01:25 am »

The Megaliths 16 channel dspMusikLCD crossover design is ready for testing. The system arrives next Sunday for measurements and listening trials to begin.

The excitement builds!!!

jtwrace · « **Reply #248 on:** 27 Nov 2017, 01:28 am »

What's the cost of this whole setup?

HAL · « **Reply #249 on:** 27 Nov 2017, 01:37 am »

Much less than most things I have seen recently at this sound quality.

Tyson · « **Reply #250 on:** 27 Nov 2017, 04:37 am »

You should bring them to one of the audio shows. I'm thinking RMAF next year would be a good choice

HAL · « **Reply #251 on:** 27 Nov 2017, 12:23 pm »

Most likely if I do it will be Capital Audio Fest for 2018. Waiting on word of large room availability.

I can drive there in a few hours.

JohnR · « **Reply #252 on:** 28 Nov 2017, 09:18 am »

Quote from: HAL on 18 Nov 2017, 11:37 pm

Looking pretty awesome

Pity it's such a long drive

HAL · « **Reply #253 on:** 7 Dec 2017, 10:40 pm »

The 16 channel dspMusikLCD with the first revision The Megaliths crossover is up and running!

Need to make more measurements and try the room correction with Foobar2000 with the new crossover.

This is getting better all the time!!!

richidoo · « **Reply #254 on:** 7 Dec 2017, 11:19 pm »

Who let the housekeeper in there!?!

Did they vacuum up all those chip amps?

Looks nice Rich, if not a bit intimidating!

Is it a 3 way?

HAL · « **Reply #255 on:** 7 Dec 2017, 11:43 pm »

It is a 7 way array speaker design.

Bob in St. Louis · « **Reply #256 on:** 11 Jan 2018, 01:05 pm »

Quote from: HAL on 19 Nov 2017, 03:33 am

..... That is the equivalent of 6.4 horsepower of drive.

I've owned lawnmowers with less power.

Great thread, I just caught wind of it.

HAL · « **Reply #257 on:** 11 Jan 2018, 01:10 pm »

Glad you are interested. Always fun to talk about it with others.

HAL · « **Reply #258 on:** 29 Jan 2018, 03:25 am »

After a lot of travel, back to The Megaliths and the updated crossover design.

Finished getting Windows 10 1709 loaded on the MS-3 and software is up and running for measurements.

With the new version of REW, it now has support for 192KHz sample rate operation. This means all speaker measurements with it are at the native processing rate of the dspMusikLCD 2x16. Using the Earthworks M550 mic and 1021 mic preamp into the ADC will give full minimum phase measurement capability for the system.

Will be doing measurement trials on Monday and see what is now possible with the new system.

There is also improved support for MathAudio RoomEQ for HiRez measurements as well. This will be part of the measurement trials.

First will be finishing the adjustments to the digital crossover for flattest response before any correction is applied.

HAL · « **Reply #259 on:** 29 Jan 2018, 10:39 pm »

The measurement system is working with the dspMusikLCD 2x16 and have the subs and mids integrated with a set of measurements. All measurement are with the 24bit/192KHz capability of the crossover running from the MS-3 Music Server.

Next is to integrate the ribbon tweeters with the mids and see what happens.