Soundbox2

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Components

Status key: ✓ = got(?), ✓? = to verify, $ = to buy, B = to borrow, M = make

Name Status Price Notes
Sack truck ✓ Has larger wheels and extendable handles.
Storage cover ✓ Motor bike cover
Box $ £31 Robust. Moisture-proof/release value. 30L? Dewalt DWST1 – 71195? 33 x 44 x 30 cm
Ratchet straps/bungee chords ✓
Baseboard + frame within box ✓/? Wooden panel(s) - right sizes? Goes over batteries? Fits to box width+height at a certain depth, suspension and equipment above
Foam inserts ?/$ £15 Suspension for amp/etc? [1]
Battery B/$ £90 Can probably borrow. Wet cell, lead acid, deep cycle. Possibly two. ~110Ah. Ballast for stack.
Car batter charger B/$ ?? Ampage? Charge times for batteries? 10A: [2]. 12A: [3] [4]. 8A: [5]. 3.8A: [6]. 6A: [7]. 7A: [8]
Voltage reader / power output regulator $ £15? Cuts off bellow a certain voltage. Alarm sound?
Battery terminal connectors $/B £15? Quick release?
Amp power cables $ £15? Welding cable?
Capacitor $ ~£50?? Required if not using lead acid for current to be sunk into? Also maybe for amp peak power?
Fuse + holder ✓ £2 Common blade fuse holder? Circuit breaker? Got a generic car amp one anyway.
Class-D amplifier ✓ AudioControl LC-6.1200. 125 watts RMS x 6 at 4 ohms (200 watts RMS x 6 at 2 ohms). 400 watts RMS x 3 bridged at 4 ohms (4-ohm stable in bridged mode)
Speaker cable ✓? Have some, 8 AWG, was power cable
Speakers ✓ Tannoy 632
30ltr plastic box ✓ To contain speakers
Bass driver $ ?? To sort at a later date
Bass enclosure $/M ?? To sort at a later date
Power step down / buck converter for player / phone charging $ ?? Buck converter 12V to 5V USB [9] [10] [11][12] [13] [14]
Player cables ✓/$ £3 RCA phono to RCA phono (got) or 3.5mm (need better) [15]
Box for player Dri Box 285 IP55 Weatherproof Green
Ground loop isolator $ £6 Stop pops from electrics on the same ground
Music player $/B ?? Single board computer / phone / head unit?
Music storage $ ?? 256Gb USB flash (x2) / SATA SSD
Remote control (for newer Android or SBC) $ £22 Flirc USB dongle? + extension?
LED lighting ✓ Push toggle LED circles, for in box
USB FM transmitter $ VAST Electronics V-FMT212R USB FM Transmitter


Table template: |- | | | |


Also wanted: soldering iron, power-tools, epoxy


Notes

Mobility

  • Sack truck with big wheels - got already, turned up randomly in the mail with no return address or follow-up.

Storage

Box for amp, battery, etc.



  • LED lamp(s) for in the box for seeing things at night


Securing

  • Bungee chords to secure box in the cart - Amazon - £5

Tatted some mini ratchet straps

Backboard

  • Wooden board for mounting amp, etc., that has two long blocks across the base that are screwed in from the outside - free?
  • Screws/washers - £5 ???
  • (Epoxy to seal the base screws? - £8???)

Battery

  • Leisure deep cycle battery - ideal: 120A/h (heavy) - Ben W. has a 70A/h and 110A.h available to use?
  • Li-Ion - lightest, most expensive
  • LiFePo4 - lighter
  • Lead-acid - heavy, ballast
  • Automatic battery charger - Halfords - £39
  • (Capacitor over battery? not needed?)


  • (fuse???)


Power (watts) is volts times amps.


Amp is 1200W.

Future proof for future speakers.

Device charging also.


2A pull for usb charge? at 12V = 24W


"In the USB 1.0 and 2.0 specs, a standard downstream port is capable of delivering up to 500mA (0.5A)

"With USB 3.0, it moves up to 900mA (0.9A). The charging downstream and dedicated charging ports provide up to 1,500mA (1.5A).

"USB 3.1 bumps throughput to 10Gbps in what’s called SuperSpeed+ mode, bringing it roughly equivalent with first-generation Thunderbolt. It also supports power draw of 1.5A and 3A over the 5V bus." [16]


5V x 3A = 15W


Power cables + fuse

CSA - cross sectional area


welding cable is thicker at the same gauge due to a better jacket, still flexible though (turning radius = 15x diamater)

got power cables already.


Total: £0 (or something for welding cables)


  • (Battery terminals - single connection for now - £7)
  • (Optional: Power on cabling - rated to 500mW??)

Capacitor

Needed?

Class D amplifier

800W - 75W x 4 RMS @ 4 Ohm

bridged: 200W x 2 RMS @ 4 Ohm

100W for 8 Ohm (tannoy speakers are 90W RMS??)

£75.72 on amazon w/ delivery

other;


  • AudioControl LC-6.1200

Speaker cable

  • Speaker connectors - for getting out the box - £8???


Speakers

  • Speakers - Tannoy 632 - Milk has these
    • Recommended amplifier power: 10-90W (no detailed spec online.. 90W RMS??)
    • Sensitivity: 87dB
    • Nominal impedance: 8 Ohm
    • Frequency response: 55 - 30.000Hz
    • Crossover frequency: 4Khz [18]

Crossover

  • 2-way passive crossover (3.8Khz mid+tweeter) - Phonocar 5/342 - £28 + £5 shipping
    • Input power: 100W RMS / 200W Max
    • Crossover Frequency: 3.8 KHz
    • Cutt-off Slope: 12 dB/Oct
    • Impedance: 4 Ohm

Or on amp? Only possible with high end.

Total: £33

Bass driver / enclosure

Player cables

  • (RCA phono to RCA phono cable - head unit to amp - £5? probably got one)
  • (3.5mm to RCA phono cable - £5? got one)

Ground loop isolator

Player

Car head unit:

£17 on aliexpress.com for a basic head unit - mp3 (usb, sdcard, 2Gb internal), aux, remote, bluetooth v3..

  • Bluetooth 4 not really available for cheap yet.


No frills:

  • RCA phono w/ female-female adaptor plus RCA to 3.5mm cable.


DIY:

Free?

  • Run an Android phone, connect to it via IR via USB to Go, occasionally as a WiFi access point.



Expensive?:

  • Mini computer
  • Controlled by infrared
  • Jukebox
  • Wifi AP and web control


  • Mopidy - MPD based, web GUI, apps, etc. (Squeezebox multi-source networked audio sync functionality easily implementable if required)
  • Arch Linux? Or prepackaged? Deends on board.
  • eMMC - for distro & applications.
  • USB3.0 - for fast file transfer
  • media storage - SATA SSD? or just use USB3.0 flash drive?
  • DAC HAT (RCA Phono)
  • Wi-Fi AP - for multi-party web access. external antenna?
  • Infrared - via USB (+extension cable). Flirc dongle.
  • FM tx - via USB. something like this (usb audio, minicoax), though that's just under £90
  • Two video outputs - to futureproof for projector and control display
  • 4K 60FPS - for one output.
  • Single board computer - Raspberry Pi size, or 90x90, like the upcoming ODROID-N1. Depends on how beefy the board is, peripherals available, mainline kernel support, community support/ecosystem.

HDMI DACs

HDMI has 8 digital audio outputs. Skip a 2 channel DAC HAT, use HDMI to RCA Phono conversion?? Would work for movies and utilising extra amp channels (monitors/headphones/automation system, etc.).



  • Ligawo 6518770 HDMI Multiformat DAC converter - grinds the HDMI source signal by | compatible with HDMI 2.0 and all other HDMI versions | High Speed HDMI FullHD to 1080p 50 / 60Hz / 4K * 2K 30Hz, HDCP, 3D, CEC, no ARC. converts digital 2.0 / 7.1 / 5.1 LPCM in analog 2.0 / 7.1 / 5.1 audio signals (RCA) | parallel output RCA, Toslink + HDMI possible - £72 (Germany)


  • Evolve II-4K HDMI Multi-Channel DAC - Essence For High Res Audio - an HDMI Multi-Channel Audio DAC de-embedder designed to extract the native, uncompressed LPCM multi-channel 24/192K audio signal from an HDMI v2.0a source like the new 4K Blu-ray players. It allows you to extract the original HDMI hi res audio signal and convert it to digital optical (bandwidth restricted) or analog multi-channel audio. It supports decoding of high resolution digital audio formats including LPCM 7.1CH, Dolby TrueHD, Dolby Digital Plus, Dolby Atmos and DTS-HD Master Audio, and supports audio sampling rates up to 192KHz at 24 bits, allowing fully synchronized video and audio. - £154 (USA, exc/ shipping/duty)



  • nanoAVR HDA - a high-resolution 8-channel digital audio processor combined with a 2x1 HDMI audio and video switch and 8-channel D/A convertor. The floating-point SHARC digital signal processor (DSP) at the core of the nanoAVR HDA 8 channels of uncompressed audio over HDMI (Linear PCM) and provides the processed output over both HDMI and through eight RCA analog connectors. - £250 (USA)

Misc

  • solding iron to make holes in box
  • epoxy to seal holes

Music library

Grip: 

~/sounds/music/FLAC/%A/%A-%y-%d/%A-%y-%d-%t-%n.%x

Grip multiartist: 

~/sounds/music/FLAC/%A/%A-%y-%d/%a-%y-%d-%t-%n.%x



Puddletag directory spaces to _:
$replace($validate(%artist%,,’`'/\*?;”|:)," ","_")/$replace($validate(%artist%,,’`'/\*?;”|:)," ","_")-%year%-$replace($validate(%album%,,’`'/\*?;”|:)," ","_")

Puddletag file spaces to _:
$replace($validate(%artist%,,’`'/\*?;”|:)," ","_")-%year%-$replace($validate(%album%,,’`'/\*?;”|:)," ","_")-$num(%track%,2)-$replace($validate(%title%,,’`'/\*?;”|:)," ","_")


 Puddletag directory remove spaces:
$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: )/$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: )-%year%-$validate(%album%,,’`'/\*?;”|: )/


 Puddletag file remove spaces:
$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: )-$if($neql(%artist%,%albumartist%),%artist%-,)%year%-$validate(%album%,,’`'/\*?;”|: )-$num(%track%,2)-$validate(%title%,,’`'/\*?;”|: )

$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: )-$if($neql(%artist%,%albumartist%),%artist%-,)%year%-$validate(%album%,,’`'/\*?;”|: )-$num(%track%,2)-$validate(%title%,,’`'/\*?;”|: )


redo:
%artist%/%artist%-%year%-%album%/ %artist%-%year%-%album%-%track%-%title%
%albumartist%/%albumartist%-%year%-%album%/ %albumartist%-%year%-%album%-%track%-%artist%-%title%

$if(%albumartist%,%albumartist%,%artist%)/$if(%albumartist%,%albumartist%,%artist%)-%year%-%album%/$if(%albumartist%,%albumartist%,%artist%)-%year%-%album%-%track%$if(%albumartist%,-%artist%,)-%title%


$validate(,,’`'/\*?;”|: -&\,)

Schema: albumartist = various artists compilation album. An if to see if albumartist and artist is different would fail for compilations including a track by the album artist. 

 Puddletag file remove spaces + albumartist ifs:
$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: -&\,)/$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: -&\,)-%year%-$validate(%album%,,’`'/\*?;”|: -&\,)/$validate($if(%albumartist%,%albumartist%,%artist%),,’`'/\*?;”|: -&\,)-%year%-$validate(%album%,,’`'/\*?;”|: -&\,)-$num(%track%,2)$if(%albumartist%,-$validate(%artist%,,’`'/\*?;”|: -&\,),)-$validate(%title%,,’`'/\*?;”|: -&\,)



To transcode library from FLAC to Opus and add in MP3s.

Cost estimation

evolving... to redo


very basic estimated cost, sans some stuff

  • amp - £76
  • crossover - £33
  • cable/connector - £12
  • housing - £120.92

is £242.92

Rulez

  • No mains or genny powered equipment to be connected in any way!!!
  • Do not use a battery for sound whilst it is being charged!!!
  • No inverter!!!

else the zzzzz get ya


((how to transfer from linux/windows usb to android without airdroid (internet)?))

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