(swe: Låda (box))
I found my sister Gunilla singing via a floor standing guitar amp at rehearsals etc… not ideal. I offered to build her a transportable PA for song and she accepted.
So it needed to be based on a sack carrier and a small lightweight loudspeaker. Me wanted to give it some proper performance in terms of fidelity as well as good wide coverage. Concerts are given but typically to smaller crowds - say a max of 50 persons in a couple of 100 sqm. Very simple operation is desired.
I came up with this concept sketch:
Its based on:
XO: 2,3kHz, 4th.
BOM: 750€ / 30 hours.
Dimensions:
It can be configured to play 5 different positions:
All electronics are mounted to a separating wall in the carrying box which in turn is mounted to the sack carrier. Loudspeaker is completely passive - spiral cord between amp and loudspeaker has 3 leads.
Operation entails:
It’s very near completion - I’m waiting for a new selector for the “Mode” switch as I got a BBM but a MBB was required.
Next up is meeting up with the artist to do sound check and personalised tuning. But before that some standard measurement here at home. Home is a small, one room, flat which has made the build not so easy - a very small kitchen is not an ultimate workshop ;-D
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I found my sister Gunilla singing via a floor standing guitar amp at rehearsals etc… not ideal. I offered to build her a transportable PA for song and she accepted.
So it needed to be based on a sack carrier and a small lightweight loudspeaker. Me wanted to give it some proper performance in terms of fidelity as well as good wide coverage. Concerts are given but typically to smaller crowds - say a max of 50 persons in a couple of 100 sqm. Very simple operation is desired.
I came up with this concept sketch:
Its based on:
- Sica 10” (10 C 2 CP 8Ω) bass prepared for coaxial tweeter
- Lavoce 1” CD (DF10.10L-8)
- Mic amplifier 2-channel but used as balanced
- t.track DSP 4x4 pro for XO, EQ and compression/gate
- 2x80W class-D TI based amp
XO: 2,3kHz, 4th.
BOM: 750€ / 30 hours.
Dimensions:
It can be configured to play 5 different positions:
- staying in transport box for quick sessions… (not ideal but usable)
- sitting on top of transport box
- mounted on sack carrier handle - handle in low position
- mounted on sack carrier handle - handle in extended position
- sitting on table etc. within 3m from transport box which is max extension for the spiral cord used
All electronics are mounted to a separating wall in the carrying box which in turn is mounted to the sack carrier. Loudspeaker is completely passive - spiral cord between amp and loudspeaker has 3 leads.
Operation entails:
- Take out power cable(s)
- Lift out speaker
- Connect to mains
- Adjust volume
- Choose “mode” - three different (EQ, compression) settings for different sound characteristics - thats it.
- Nock-em’out with some pop-jazz….
- Write autographs
It’s very near completion - I’m waiting for a new selector for the “Mode” switch as I got a BBM but a MBB was required.
Next up is meeting up with the artist to do sound check and personalised tuning. But before that some standard measurement here at home. Home is a small, one room, flat which has made the build not so easy - a very small kitchen is not an ultimate workshop ;-D
//
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