First of all, I have to say, my idea is inspired by Roland, but, nevertheless I have bit another idea. It's not be aimed at particular brad, but something what can make your piano sound spectacular.
First of all needed components are:
- small stereo amplifier
- set of speakers
- digital crossover, like Behringer DCX2496 or similar
- total cost should be between 600-1000 USD
My idea consist of
1. Below the keyboard - mounted at bottom back plate:
- two 10 inch woofers
- six-eight small woofers/fullrange to create a soundbar
- two 10-12 inch fullrange speakers
my favourite is option 1 or 3
They should be cut around 500-600Hz (that's just an idea)
2. At the top of the piano you have to build around 10cm (or lower if possible ) C letter shaped construction, inside which you will place :
- 4 midrange speakers at the bottom line of the piano (be tchem only coned or classic). midranges will be directed straight up
- 2 tweeter which will be placed at the left and right corners of the piano, directed towards the pianist head
Another option to fit the tweeters is to place them after first and third midrange, so there will be only small box placed at the top of the piano.
Considering using good, but not overly expensive speakers like Scan-Speak Discovery, Dayton, Hi-Vi, the cost will not be too high.
3. Sound will be delivered via line out.
What do you think about it? Active crossover and amp you can hide somehow below the keyboard.
How do you see that concept? Do oyu think it is possible to get the reliable sound projection both for pianist and listeners? Do you see any pros or cons?
Of course, after doing the basic set-up, the proper measurements should be made at the point of pianist head, and using the proper white or another noise the crossover should be set-up.
For the brave ones, I think there is also possibility to cut the hald of top plate, and mound the speaker bar with the top of it at the level of top plate and cover with speaker cloth (sorry, I don't know the proper enligh name for loudspeaker sound transparent cloth covers).
Of course, that design is made to be working with the pianos which do not have too complicated sound projection systems, otherwile I see it impossible to fit with the piano.
Attached simple drawing. In the red lines I marked that additional soundbar to be placed on the piano.
What I see at potential of it is:
- you can merge it with piano with little of change to it, it's not as scary as full monitors
- probably it is possible to get the audiophile sound quality and even made it to our own taste by using the drivers we prefer
- you don't have to pay the premium price (od double the price of the piano) for speaker system, just buy the cheapest piano from the series and voila!
- it is costly
- you need to have friends who has spekaer measurement microphones and software (fortunately, I have)
- you need to be a bit brave, because you need to have some basic DIY skill
- say goodbye to warranty in case of fully mergin with piano (but it is possible to use my idea without any changes to piano)
- it's limited to not too much pianos