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Link back to the Battey Based Audiophile

http://www.stereo.net.au/forums/topic/75988-a-battery-based-audiophile-story/

Time to start a fresh chapter, or think of it as going from prep to grade 1.

This thread will be similar but will concentrate more on the finer points of 

 

1. Room, listening zone acoustics, in response to the stereo or actual waterfall plotting and explanations

2. Getting to the bottom of testing and applying data to speaker response curves, the outside test and then the inside of the room for the fully active system.

3. Front End of system.

4. Speaker Enclosure and Amplifier construction.

5. Opening a hobby based specialized Audio listening Center on NW Tasmania.

6. Off Grid Power Supplies for AV and why they can be superior. The DC/DC stereo will pop up from time to time as well.

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It is with great honor that I have been asked to post details of completion for the following threads: https://www.stereo.net.au/forums/topic/242308-quick-diy-flex-racks/ https://www.stereo.net

A bit off topic but here is a photo of a DC Blocker I am building for a customer. has 4 x 100,000uf caps for the actual blockers and the nice industrial volt and current meters.  

Here you go hot off the press!   Rear panel will be fitted soon, so more images to come.

On 12/16/2016 at 3:24 PM, Upfront said:


My what a big battery bank you have!

Big enough to get the Police out for a visit after midnight :D:partyand stayed for an hour watching Star Wars, haha

While thhe Mrs is away

opps

 

 

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New Chapter, 

New Gear List, starting with the mains driven system almost completed construction. 

Something to be clear about, power and IC cables are either DIY or the 10buck IEC. Personal belief that good fresh connections are of more value than expensive ones.

 

Design and application

4 way, Floor Standing, active big system capable of over 125dB with frequency response from 10Hz to 20Khz, 

 

Test and Verification

miniDSP usb mic, REW

Audio Control, 3rd Octave real time spectrum analyzer, Calibrated powered mic.

 

Power supply.

SMA Sunny Island 6, 4.6Kva continuous 10Kva+ transient peak at mains volts of 230vac at less than 3% waveform distortion allowable before supply trip at full peak loading

 

10, Suntech 270w Mono Solar Modules in a string charging a 15Kwh Absolite AGM Battery

Method of charging battery is via an ac coupling with a SMA Sunny Boy, 2.5Kva grid tie type Inverter, re programmed to run off grid.

 

2 separate 230vac mains circuits,  4mm2 for amps @ 20A, 2.5mm2 @16A for the front end with 500va isolation transformer as an optional full isolation for the front end of the single ended unballanced system. Conventional MEN to the same earth stake as the rest of home.

 

All power points are the Clipsal double pole type

All associated protective Switch Gear is NHP Mod 6

 

Speakers

 

PSE 144, 2 way Point Source Horns, 250Hz and up to 20Khz

Eminence Magnum 18" mid bass (or)

Acoustic Elegance TD18'+4 (enclosures to be constructed), 32Hz to 250Hz

Exidos Maelstron x 4, 18" subs 10 to 32Hz

 

Amps (power)

 

Holton Precision Audio

3 x  250wrms x 2 Dual Monos 

1 x  6 channel, 4 x 100wrms and 2 x 150wrms

 

Total amplification expressed at an 8 ohm impedance, somewhere close to 2.6Kw. into lower impedances such as the subs and mid bass of 4 ohms, 5Kw

 

Front End and DSP

miniDSP 2 x 8 with miniDSP Dirac, for starters  or whatever comes along like a pair of DEQX units

Burson Conductor  as a pre

The venerable ASUS STX sound card, as stock or heavily modified, highly media oriented customised PC

A choice of TT pre amps, valve or SS

Micro Seiki MR611 Turntable. Clearaudio Beta 1 wood body Cart

Networked via Synology 4K capable NAS, 

 

time to get to work, finishing off the new amps.

 

 

 

 

 

 

 

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New Chapter, 
New Gear List, starting with the mains driven system almost completed construction. 
Something to be clear about, power and IC cables are either DIY or the 10buck IEC. Personal belief that good fresh connections are of more value than expensive ones.
 
Design and application
Floor Standing big system capable of over 125dB with frequency response from 10Hz to 20Khz, clean undistorted.
 
Test and Verification
miniDSP usb mic, REW
Audio Control, 3rd Octave real time spectrum analyzer, Calibrated powered mic.
 
Power supply.
SMA Sunny Island 6, 4.6Kva continuous 10Kva+ transient peak at mains volts of 230vac
10, Suntech 270w Mono Solar Modules in a string charging a 15Kwh Absolite AGM Battery
Method of charging battery is via an ac coupling with a SMA Sunny Boy, 2.5Kva grid tie type Inverter, re programmed to run off grid.
 
2 separate 230vac mains circuits,  4mm2 for amps @ 20A, 2.5mm2 @16A for the front end with 500va isolation transformer as an optional full isolation for the front end of the single ended unballanced system. Conventional MEN to the same earth stake as the rest of home.
 
All power points are the Clipsal double pole type
All associated protective Switch Gear is NHP Mod 6
 
Speakers
 
PSE 144, 2 way Point Source Horns, 250Hz and up to 20Khz
Eminence Magnum 18" mid bass (or)
Acoustic Elegance TD18'+4 (enclosures to be constructed), 32Hz to 250Hz
Exidos Maelstron x 4, 18" subs 10 to 32Hz
 
Amps (power)
 
Holton Precision Audio
3 x  250wrms x 2 Dual Monos 
1 x  6 channel, 4 x 100wrms and 2 x 150wrms
 
Total amplification expressed at an 8 ohm impedance, somewhere close to 2.6Kw. into lower impedances such as the subs and mid bass of 4 ohms, 5Kw
 
Front End
Burson Conductor
The venerable ASUS STX sound card, as stock or heavily modified 
A choice of TT pre amps, valve or SS
Micro Seiki MR611 Turntable.
Networked via Synology 4K capable NAS
 
time to get to work, finishing off the new amps.
 
 
 
 
 
 
 

Looking forward to hearing the new amps mate
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On 12/17/2016 at 2:51 PM, Upfront said:


Looking forward to hearing the new amps mate

Me too, if I get my act together will get them close to fire up today or later this week

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Starting to get on top of building the lounge/shop, power supplies and other wonderful stuff. Life is good.

More panels going on, building Custom ready to install RAPS, test battery and cables/protection, lots of things.

IMG_4692.JPG

IMG_4688.JPG

IMG_4691.JPG

IMG_4694.JPG

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On 12/22/2016 at 2:22 AM, Upfront said:


Looks like santa has already been to your place mate!

Should hear em workin. 

Yep Santa came early

 

Nice "plug" Linc, nice

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50-0-50v transformers 625va x 6, platforms with rubber mounts and blind nuts going together. Closer to done, some power wiring and commissioning mosFET bias from there 

IMG_1126.JPG

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On 12/24/2016 at 4:02 AM, CryptiK said:

Nice work man. Only 4 output devices per channel? How hard will they be working for the amps output?

Hello, I believe the mosfets are specified carry around 250w into 8 ohms, per side. Dual die Exicon fets. 

The power supplies could be pushed to 4 amp modules easily and may modify one of these to make a 4 x 250w

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Hiding the subs works. seems to have instantly lost the "intimating look"

 

Treating those with black carpet, some baffle plates and grills will work there me thinks although, getting the "thing" working should proceed before the deconstruction of the subs.

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Hiding the subs works. seems to have instantly lost the "intimating look"
 
Treating those with black carpet, some baffle plates and grills will work there me thinks although, getting the "thing" working should proceed before the deconstruction of the subs.

Where did you hide them?
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On 12/28/2016 at 1:10 PM, Upfront said:


Where did you hide them?

Under the looms of material. Taking those off is like unveiling 2 statues of the school playground bully's . :( but ugly

Will work on some cosmetic intergration

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Under the looms of material. Taking those off is like unveiling 2 statues of the school playground bully's . [emoji20] but ugly
Will work on some cosmetic intergration

Just looked back on the last few photos. Got ya now! Not exactly "hidden"!
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On 12/28/2016 at 1:22 PM, Upfront said:


Just looked back on the last few photos. Got ya now! Not exactly "hidden"!

Have been known to hide things in plain view before.

Experimenting with the looks of everything, I may settle for this.

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Have been known to hide things in plain view before.
Experimenting with the looks of everything, I may settle for this.

I wouldn't worry about hiding them mate. Own it!!!
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Will start with this lot,  almost ready for power up.

Holton 6 x 100w and 2 x 250w, miniDSP 2x8, miniDSP Dirac DDRC-22D, the Retrothermonic valve pre.

Bring the other amps in later.

Start with records and analogue in to get a feel for what is going on with the rig.

The new face plate on the 6 channel blinged it a bit.

IMG_1147.JPG

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Will start with this lot,  almost ready for power up.
Holton 6 x 100w and 2 x 250w, miniDSP 2x8, miniDSP Dirac DDRC-22D, the Retrothermonic valve pre.
Bring the other amps in later.
Start with records and analogue in to get a feel for what is going on with the rig.
The new face plate on the 6 channel blinged it a bit.
IMG_1147.JPG

Always good to start simple with so many new toys to play with mate. You need to fight the urge to throw everything at it!
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On 12/28/2016 at 5:19 PM, Upfront said:


Always good to start simple with so many new toys to play with mate. You need to fight the urge to throw everything at it!

Bet there will be another year or so fiddling about in this one Linc.

 

Going to start fresh with field measurements, want to hear it playing music again first though, has been 6 months. 

(just in the motions of getting the front end up and singing).

 

Interestingly enough there is well over 1000w RMS in that pile of gear, let alone the rest of it.

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It's the type of system that you want to get out of bed early like a kid on Christmas day (weekends or holidays) so as to get the tunes rolling.  

 

Nice to have the big system going again. The horns exude resolve, feelings and emotion. Revelation of content with authority 

 

The journey is over, made it home.

Just another few enclosures/baffles to build for fun and some details with amplification to sort out and the job is done, with this one.

IMG_1152.JPG

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