New 8in OB H-Frame servo subs cabinets

HAL · « **Reply #20 on:** 4 Oct 2023, 08:53 pm »

Wiring has occurred.

Now to get the Music Server PC setup and start Audio Weaver to download the new DSP crossover prototype to the dspNexus 2x8.

Next is measurements of the MG10/QR drivers for an updated DSP crossover design.

HAL · « **Reply #21 on:** 6 Oct 2023, 09:37 pm »

The two 4x8in OB servo sub cabinets are off to finishing at the cabinet shop.

Going to be a semigloss black finish, but not the Hot Rod Black. It will be waterproof.

Tyson · « **Reply #22 on:** 7 Oct 2023, 01:23 am »

Is this for a customer or are you doing purely as a HAL project?

HAL · « **Reply #23 on:** 7 Oct 2023, 01:31 am »

Tyson,
These are prototype 8in servo subs that will lead to production systems.

These should work well for most planar systems to add low end down to 30Hz. The stack size depends on the room.

Most people say the 12in size servo subs look or are too big for their rooms. These should solve that problem.

Rythmik Audio will be the deciding factor. I am looking at the HX310 servo amps as they can be modified for balanced input and 8in OB systems. We shall see what happens with those inputs to them.

Tyson · « **Reply #24 on:** 7 Oct 2023, 01:37 am »

Can you run 4 subs on a single amp? I know the 12 inch subs are limited to 3 drivers per amp.

Tyson · « **Reply #25 on:** 7 Oct 2023, 01:40 am »

Something else that might be fun is lay the subs sideways and set the planars on top of them. That would be REALLY space efficient, lol.

HAL · « **Reply #26 on:** 7 Oct 2023, 01:45 am »

Tyson,
My understanding is that the new batch of 8in servo subs have higher impedance so a 4x8in stack will run on one amp.

That will be tried once prototype servo amps arrive. It should work correctly.

Yes, with modules it is easy to experiment with different sub configuration. The limitation will be length of the inter sub wiring to the servo amps.

Might try that with the MG10/QR's with either all lying down as a stand or maybe two one each side of the speaker.

Tyson · « **Reply #27 on:** 7 Oct 2023, 02:01 am »

HAL · « **Reply #28 on:** 16 Oct 2023, 03:16 pm »

Looks like the prototype servo amps for the 8in servo subs will be here this week.

Time to build some amp cabinets.

HAL · « **Reply #29 on:** 18 Oct 2023, 03:59 pm »

The servo amps need boxes, so these are captainhemo's HX style flat pack boxes.

Box #1 it glued and clamped to dry. Then on to box #2 assembly.

HAL · « **Reply #30 on:** 22 Oct 2023, 12:02 am »

The custom modified HX300-8OB servo amps are here and now in their boxes to get wired to the servo subs. This is not the original HX300-8OB.

Using the Neutrik 4-pole Speakon connectors on the cabinets and wiring harness for simple connections.

Wiring the cable harness is ongoing as the parts arrived today to complete the wiring.

The 4x8in OB cabinets are to be finished this week and delivered.

Getting closer!

HAL · « **Reply #31 on:** 22 Oct 2023, 02:06 am »

The servo amps are wired and ready for testing.

Next step is to wire the cable harness to the individual modules.

nlitworld · « **Reply #32 on:** 22 Oct 2023, 03:16 am »

mix4fix · « **Reply #33 on:** 22 Oct 2023, 05:03 am »

Quote from: HAL on 22 Oct 2023, 02:06 am

The servo amps are wired and ready for testing.

Next step is to wire the cable harness to the individual modules.

On the speaker side of cabling, why not put terminals in the wood box so customers can use whatever cable brand they like/have clean looking wiring?

HAL · « **Reply #34 on:** 22 Oct 2023, 11:44 am »

The latest version of these amp boxes can have the Neutrik connector mounted in the box. The wiring is directly from the amp board without any other connections before the cable. This was just convenient to put the Neutrik connector on the existing cables.

These are early versions of the mounting boxes that did not have the mounting hole drilled. They can be made with or without the mounting hole.

The servo amps requires a 4 wire connection to the servo sub drivers for the servo amp to work correctly.

The customer can purchase them either way as flat packs, or as built.

HAL · « **Reply #35 on:** 23 Oct 2023, 06:37 pm »

The HX300-8OB servo amps are wired to the two sets of 4x8in servo subs. They are now working as expected.

The finished 4x8in OB H-Frames should be here on Friday to finish the install of the drivers and wiring.

Tyson · « **Reply #36 on:** 23 Oct 2023, 07:09 pm »

That room looks like an audio laboratory. Love it!!

HAL · « **Reply #37 on:** 23 Oct 2023, 07:24 pm »

Tyson,
It is an audio lab. Wait until I have the two new 6x12's servo subs built and take two more 3x12's to the rear of the room!

That is going to be an experiment!

Tyson · « **Reply #38 on:** 23 Oct 2023, 07:33 pm »

Quote from: HAL on 23 Oct 2023, 07:24 pm

Tyson,
It is an audio lab. Wait until I have the two new 6x12's servo subs built and take two more 3x12's to the rear of the room!

That is going to be an experiment!

I have 2 towers of 3x12 OB subs in my basement, so 6 bass woofers total, and that's already insane amounts (and quality) of bass. I can't even imagine having 18!!!!

nlitworld · « **Reply #39 on:** 23 Oct 2023, 07:34 pm »

Quote from: HAL on 23 Oct 2023, 07:24 pm

Tyson,
It is an audio lab. Wait until I have the two new 6x12's servo subs built and take two more 3x12's to the rear of the room!

That is going to be an experiment!

And how soon til you replace the foundation to your house? Sheesh, all that shaking will register on the Richter scale for sure!