Another Markaudio CHN110 based project with a Beyma DOS sub

[ppataki]

Just sharing yet another project I designed for my brother-in-law this time

Basically it is about building two sealed cabinets (baltic birch plywood) with Markaudio CHN110 drivers and accompany them with a sealed DOS (dual opposed subwoofer) sub using 2x Beyma 8BR40/N drivers.

Here is how the front cabinets will look like:

They will each provide 85dB at 1m at 24Hz with 25W load (which is the xmax limited max load) --> 91dB for stereo + room gain
They will be cut at 80Hz where the max SPL will be 99+6 = 105dB

The DOS sub:

This one will provide 96dB at 24Hz at 1m + room gain (with 95W being the xmax limited max load)

This is his first speaker project so the aim was to keep the costs to a minimum
CHN110 costs 60 EUR each and the Beyma 70 EUR each so I guess we have managed to achieve that

The Markaudios will be driven by a Loxjie A30 amp (the 2x25W max required power at 8ohm shall be fine with this amp)
A Sabaj A20A in bridged mode will be connected to the sub out of the A30 driving the Beymas

I know that this way there will be no HPF to the fronts but that is a compromise that is fine for now - the upgrade path is to use a multichannel DAC (e.g. Universal Audio Volt 4) and connect the amps to it (fully independent 3 channels basically)

Source will be a PC with heavy DSP - initially based on REW but Dirac Live 3.X will be considered too as an upgrade path

Will post pictures and measurements as the project progresses
Stay tuned!

EDIT: pictures as per the below

 

[Tangband]

Just sharing yet another project I designed for my brother-in-law this time

Basically it is about building two sealed cabinets (baltic birch plywood) with Markaudio CHN110 drivers and accompany them with a sealed DOS (dual opposed subwoofer) sub using 2x Beyma 8BR40/N drivers.

Here is how the front cabinets will look like:

View attachment 310282

They will each provide 85dB at 1m at 24Hz with 25W load (which is the xmax limited max load) --> 91dB for stereo + room gain
They will be cut at 80Hz where the max SPL will be 99+6 = 105dB

View attachment 310283

The DOS sub:

View attachment 310284

This one will provide 96dB at 24Hz at 1m + room gain (with 95W being the xmax limited max load)

View attachment 310285


This is his first speaker project so the aim was to keep the costs to a minimum
CHN110 costs 60 EUR each and the Beyma 70 EUR each so I guess we have managed to achieve that

The Markaudios will be driven by a Loxjie A30 amp (the 2x25W max required power at 8ohm shall be fine with this amp)
A Sabaj A20A in bridged mode will be connected to the sub out of the A30 driving the Beymas

I know that this way there will be no HPF to the fronts but that is a compromise that is fine for now - the upgrade path is to use a multichannel DAC (e.g. Universal Audio Volt 4) and connect the amps to it (fully independent 3 channels basically)

Source will be a PC with heavy DSP - initially based on REW but Dirac Live 3.X will be considered too as an upgrade path

Will post pictures and measurements as the project progresses
Stay tuned!

EDIT: pictures as per the below

View attachment 310286


View attachment 310287

Very interesting !
it will be interesting to see what you think about the sound quality from chn110.
If not playing very loud, I dont think you need any HP crossover for the chn110, but it can be easily made passive at line level. Any eventual BSC can also be made that way ( as you know ) .

* Without any HP crossover for main speakers it will blend nicely together with electrical 12 dB LP crossover for the subs.

 

[ppataki]

I already have a pretty good experience with the CHN110, I have designed a complete home theater system for my neighbor, please see:

Home theater project using Markaudio CHN110

I thought I would share yet another DIY project that is going to start hopefully next week. I will keep on refreshing this post as we progress further. It will be a 5.0 system for my neighbor. He already has a sub but that will also be replaced with a DIY Dayton Audio Reference based model (that...

www.audiosciencereview.com

* Without any HP crossover for main speakers it will blend nicely together with electrical 12 dB LP crossover for the subs.

I agree, but as an upgrade path probably a fully active 3-channel solution will be the way forward

I shall have some more pictures next week and after that some measurements too (depending on the pace of my brother-in-law finishing the cabinets.....)

 

[ppataki]

Slow progress, but getting there....

 

[ppataki]

All three speakers are now in place and hooked up properly:

I will need to see when I can pop in to my brother-in-law to perform the measurements and the optimization
Stay tuned!

 

[ppataki]

This is how it sounds without any DSP:

CHN110+Beyma.mp4

drive.google.com

 

[Tangband]

This is how it sounds without any DSP:

CHN110+Beyma.mp4

drive.google.com

1. If people knew how good sounding those chn110 drivers are they would sell their expensive speakers and start DIY.
Nice system .

2. If people knew how good sounding the PEQ funktion in the WiiM pro is, they would sell their expensive streamers.
This is perfect for the chn110, just a small dsp correction at 950 Hz ( -1,5 dB Q=2 ) and maybe some baffle step correction ( below 450 Hz , +1,5 dB Q =4 )

 

[norman bates]

very nice setup

 

[ppataki]

Here are the FR measurements at listening position (220 cm) at 75dB, 1/12 smoothing, left speaker
before/after correction

I must say I have never measured any untreated living rooms like this - virtually there are no dips below 200Hz - totally unbelievable
Both my rooms are total crap compared to this....I have a damn lucky brother-in-law apparently

Here is the Dirac measurement screen:

And here is how it sounds - with the correction of course and an additional target curve to taste (not a Dirac target curve but a totally custom one using T-Racks EQual)

2 new items by Peter Pataki

photos.app.goo.gl

My brother-in-law could not be happier! (and me too)

Upgrade path (probably next year): get an affordable multichannel DAC (probably the Volt 4) and replace the Loxjie A30 with a better amp and set up the crossover properly, potentially using T-Racks EQual or LinPhase EQ or something along those lines)

 

[Tangband]

Very nice ! And nice to see your measurements before correction is very similar to mine .

 

[Tangband]

How much do you experience the peak at 950 Hz as disturbing ? For me its better for most pop and rock music without correction, but for classical I use PEQ - 2 dB Q3 at this frequency .

 

[ppataki]

How much do you experience the peak at 950 Hz as disturbing ? For me its better for most pop and rock music without correction, but for classical I use PEQ - 2 dB Q3 at this frequency .

We just compared the corrected vs uncorrected results as a whole - did not scrutinize each peak/dip so unfortunately I cannot comment on that
I totally prefer a fully flat curve + low/high shelves to taste so I always aim for that when correcting a system (I know others here don't prefer that but I guess that is subjective)