Ian Mackenzie
06-07-2023, 07:43 PM
I everyone,
I’ve been busy of late on a home audio project.
I’ve put this in the general audio forum as l bought most of the additional equipment after l sold off what l no longer needed. The alternative was thinking about it for 20 years….Lol.
What started out as a home renovation has morphed into a multi purpose media room for home theatre, hifi sound reproduction and a studio for webinars and podcasts.
About twelve months ago l decided to obtain a recommendation on acoustic room treatments while involved in the home renovations.
I became interested in home theatre and Atmos music recordings. After a long gestation of thoughts l started to procure equipment including a JBL Synthesis 16 channel processor, powered JBL LRS 308 monitors and JBL 2P Control monitors. The front and centre channels are M2 clones. I was a bit concerned the LSR 308 wouldn’t cut it subjectively. In this application it works very well.
Progress
The bass traps are almost ready.
I am currently installing the balanced signal cables in the ceiling which is a challenge.
Once to ceiling to re painted a timber equipment rack will be fabricated for the audio components.
Still a fair way from completion. I’m certainly not the first to consider a JBL M2 based multi channel system. With the M2 components on hand it made sense.
Why the JBL SDP 58 processor?
In the end it offered more than any other processor with the features l needed. My own view is that Atmos music will at some point become more than binaural (headphone). The difference over a stereo mix is a game changer when done right on some recordings. (IMHO. Note. I am prone to excessive exaggeration and changing my mind frequently…Lol). I bought this processor much cheaper than the RRP. How? Don’t ask.
The sound.
Based on my initial listening without Dirac EQ l’m impressed. It’s more than multiple channels with Dolby’s latest processing. The sound is alive in a natural way that draws your attention to the content. Not the equipment. Harman Luxury Group have offered technical support if required. (Piece of mind).
I sort out the least costly way to do this. But even after hocking off everything l didn’t need (excluding the grandmother) it does add up. That said l think the project will open up opportunities to explore new media formats and AV experiences. Yes l will still enjoy two channel analogue with JBL legacy monitors.
Thanks to Mr Widget and Rob H for their kind input.
The bottom image is for illustration purposes only. The actual room is about 19.5 ft x 18 ft.
Acoustic Treatments
The end result will be corner and ceiling bespoke bass traps, acoustic panels on walls, ceiling and acoustic curtains in a furnished room.
The products l used are in the following links
Acoustic curtains that really work. But they are not cheap.
https://materialised.com.au/product-category/windows/acoustics/sheer-acoustic/
https://csrmartini.com.au/our-products/martini-deco-quiet-panel
https://csrmartini.com.au/our-products/martini-absorb
Equipment
Samsung 65” Edge Flat Screen
Amplifiers
Yamaha P7000S
https://www.crutchfield.com/S-OXECMI4HVGy/p_845P7000S/Yamaha-P7000S.html
Parasound A23+
https://www.parasound.com/a23+.php
Dual 12 inch CSS Audio subs with twin passive radiators cover the LF.
The claimed Xmax is 28mm.
Amplification yet to be determined.
https://www.css-audio.com/online-sto...fer-p110031759
One pair for surround sides
https://jblpro.com/products/308p-mkii
Three pair for Atmos overhead
https://jblpro.com/en/product_families/control-2p
Processor
https://www.jblsynthesis.com/products/electronics/SDP58-.html
Fronts and centre M2 clones
Loudspeaker Format 7.2.6
I used Audio Visions online Ai Atmos theatre designer and other references for the locations of the bed layer and the overhead layer.
The primary listening and viewing position is about 2.7m from the TV screen.
Riser 15cm (portable for the 2nd row)
Loudspeaker locations
The fronts are 2.7 metres apart
Immersion 29.5 degrees (average with a 65” screen)
The main side surrounds are 2.8 m from the front of the TV screen.
The surround rears are 5.8 m from the front of the TV scream & 3.4 metres apart.
The front, middle and rear Atmos overhead loudspeakers are 1.73 m, 2.93 m and 4.12 m respectively from the front of the TV scream with an 8 ft (2.4 m) ceiling. The distance between the L&R Atmos loudspeakers is 2 m. Each Atmos overhead loudspeaker has a swivel mount to angle the tweeter precisely at the listening position.
I used a 70/30 percent Ai acoustic optimisation of the primary front row and the second row seats to set the surround and Atmos loudspeaker angles. Using six Atmos overhead loudspeaker made the optimisation possible with two rows. It will be interesting to experience how it works out.
I’ve been busy of late on a home audio project.
I’ve put this in the general audio forum as l bought most of the additional equipment after l sold off what l no longer needed. The alternative was thinking about it for 20 years….Lol.
What started out as a home renovation has morphed into a multi purpose media room for home theatre, hifi sound reproduction and a studio for webinars and podcasts.
About twelve months ago l decided to obtain a recommendation on acoustic room treatments while involved in the home renovations.
I became interested in home theatre and Atmos music recordings. After a long gestation of thoughts l started to procure equipment including a JBL Synthesis 16 channel processor, powered JBL LRS 308 monitors and JBL 2P Control monitors. The front and centre channels are M2 clones. I was a bit concerned the LSR 308 wouldn’t cut it subjectively. In this application it works very well.
Progress
The bass traps are almost ready.
I am currently installing the balanced signal cables in the ceiling which is a challenge.
Once to ceiling to re painted a timber equipment rack will be fabricated for the audio components.
Still a fair way from completion. I’m certainly not the first to consider a JBL M2 based multi channel system. With the M2 components on hand it made sense.
Why the JBL SDP 58 processor?
In the end it offered more than any other processor with the features l needed. My own view is that Atmos music will at some point become more than binaural (headphone). The difference over a stereo mix is a game changer when done right on some recordings. (IMHO. Note. I am prone to excessive exaggeration and changing my mind frequently…Lol). I bought this processor much cheaper than the RRP. How? Don’t ask.
The sound.
Based on my initial listening without Dirac EQ l’m impressed. It’s more than multiple channels with Dolby’s latest processing. The sound is alive in a natural way that draws your attention to the content. Not the equipment. Harman Luxury Group have offered technical support if required. (Piece of mind).
I sort out the least costly way to do this. But even after hocking off everything l didn’t need (excluding the grandmother) it does add up. That said l think the project will open up opportunities to explore new media formats and AV experiences. Yes l will still enjoy two channel analogue with JBL legacy monitors.
Thanks to Mr Widget and Rob H for their kind input.
The bottom image is for illustration purposes only. The actual room is about 19.5 ft x 18 ft.
Acoustic Treatments
The end result will be corner and ceiling bespoke bass traps, acoustic panels on walls, ceiling and acoustic curtains in a furnished room.
The products l used are in the following links
Acoustic curtains that really work. But they are not cheap.
https://materialised.com.au/product-category/windows/acoustics/sheer-acoustic/
https://csrmartini.com.au/our-products/martini-deco-quiet-panel
https://csrmartini.com.au/our-products/martini-absorb
Equipment
Samsung 65” Edge Flat Screen
Amplifiers
Yamaha P7000S
https://www.crutchfield.com/S-OXECMI4HVGy/p_845P7000S/Yamaha-P7000S.html
Parasound A23+
https://www.parasound.com/a23+.php
Dual 12 inch CSS Audio subs with twin passive radiators cover the LF.
The claimed Xmax is 28mm.
Amplification yet to be determined.
https://www.css-audio.com/online-sto...fer-p110031759
One pair for surround sides
https://jblpro.com/products/308p-mkii
Three pair for Atmos overhead
https://jblpro.com/en/product_families/control-2p
Processor
https://www.jblsynthesis.com/products/electronics/SDP58-.html
Fronts and centre M2 clones
Loudspeaker Format 7.2.6
I used Audio Visions online Ai Atmos theatre designer and other references for the locations of the bed layer and the overhead layer.
The primary listening and viewing position is about 2.7m from the TV screen.
Riser 15cm (portable for the 2nd row)
Loudspeaker locations
The fronts are 2.7 metres apart
Immersion 29.5 degrees (average with a 65” screen)
The main side surrounds are 2.8 m from the front of the TV screen.
The surround rears are 5.8 m from the front of the TV scream & 3.4 metres apart.
The front, middle and rear Atmos overhead loudspeakers are 1.73 m, 2.93 m and 4.12 m respectively from the front of the TV scream with an 8 ft (2.4 m) ceiling. The distance between the L&R Atmos loudspeakers is 2 m. Each Atmos overhead loudspeaker has a swivel mount to angle the tweeter precisely at the listening position.
I used a 70/30 percent Ai acoustic optimisation of the primary front row and the second row seats to set the surround and Atmos loudspeaker angles. Using six Atmos overhead loudspeaker made the optimisation possible with two rows. It will be interesting to experience how it works out.