This will require a battery powered, or better yet, powered by a lithium ion laptop battery or two.
Is there a diy schematic/parts list for a pig nose or similar anp?
I got the idea busking, often amplified instruments are a non no, I used a Roland rechargeable amp hidden in a backpack, but still got tickets or shut down.
I have two possible ways to do it, first hiding conventional drivers behind the f holes, secondly, and preferably, using something like a reverse piezo pickup That would make the wooden soundboard vibrate to produce the sound. Any ideas on how to make something like that? Would it be loud enough? Maybe a combination of both, a 6"sealed back driver at the back of the bass body, pointed at the f hokes. or a line array of 10-20 1-2" drivers. Or maybe I'll totally lame out and just buy DC powered computer speakers with a subwoofer and stick them inside. It doesn't need to be super loud, as loud as a very good acoustic guitar. The exact target loudness is a accordion (the most successful busker I met played an accordion, they can be heard a block away. Keeping up with a violin, sax, drummer would be tasty mango butter sauce) even expensive double bass s are quiet, a diy will be barely audible un amplified.
I would like it to be half the width of a conventional 3/4 sized double bass. I wish I had ! 500$ extra to just buy a Chinese upright kit.
Any input welcome. Copycats welcome! (But please don't copyright or patent my idea!!)
Is there a diy schematic/parts list for a pig nose or similar anp?
I got the idea busking, often amplified instruments are a non no, I used a Roland rechargeable amp hidden in a backpack, but still got tickets or shut down.
I have two possible ways to do it, first hiding conventional drivers behind the f holes, secondly, and preferably, using something like a reverse piezo pickup That would make the wooden soundboard vibrate to produce the sound. Any ideas on how to make something like that? Would it be loud enough? Maybe a combination of both, a 6"sealed back driver at the back of the bass body, pointed at the f hokes. or a line array of 10-20 1-2" drivers. Or maybe I'll totally lame out and just buy DC powered computer speakers with a subwoofer and stick them inside. It doesn't need to be super loud, as loud as a very good acoustic guitar. The exact target loudness is a accordion (the most successful busker I met played an accordion, they can be heard a block away. Keeping up with a violin, sax, drummer would be tasty mango butter sauce) even expensive double bass s are quiet, a diy will be barely audible un amplified.
I would like it to be half the width of a conventional 3/4 sized double bass. I wish I had ! 500$ extra to just buy a Chinese upright kit.
Any input welcome. Copycats welcome! (But please don't copyright or patent my idea!!)
I suggest to look at the market of electric bikes, as the batteries are very good though expensive, but ion-lithium has the advantage of being light -that's a good quality for a battery. Or the batteries for RC cars(elicopters/airplanes).
So about 3/6 Ampere per element (cell). You can go for 24 (27 ) V - 6 A/h
and get the necessary (smart) charger. Once you've done with the supply department, you can go with the amplifier and electronic side of the project:
30/40 W might be achievable from a 24 V supply ( I'm thinking of some easy chip-pased amplifiers such as TDA 2052 ) and a pick-up preamplifier should be no problem ( two Fets or transistor or Op-amp).
For the transducer point, it depends on the weight! A 8-10" with a big magnet is difficult to carry along.
So about 3/6 Ampere per element (cell). You can go for 24 (27 ) V - 6 A/h
and get the necessary (smart) charger. Once you've done with the supply department, you can go with the amplifier and electronic side of the project:
30/40 W might be achievable from a 24 V supply ( I'm thinking of some easy chip-pased amplifiers such as TDA 2052 ) and a pick-up preamplifier should be no problem ( two Fets or transistor or Op-amp).
For the transducer point, it depends on the weight! A 8-10" with a big magnet is difficult to carry along.
I guess that those money is needed for the battery only 😡😱
Thanks, sounds good.
the new neo drivers are light enough, leaning towards an 8"or 10", possibly two 6's and some passive radiators in the top..., maybe faitals neo
the new neo drivers are light enough, leaning towards an 8"or 10", possibly two 6's and some passive radiators in the top..., maybe faitals neo
You mean ...in the guitar body ?
I would leave everything separated - Instrument>pick-up>battery&lifier stages>box with transducers.
Maybe a foldable box like two semi-halves each with one 10".
I would focus mainly on one thing getting done ! Search also for class-D amplifiers running at 24 V - you can scrounge 50 W from a tiny beast and save batteries, as they're very efficient. Or you can go higher with the battery pack, like 36 or 48 V.
I would leave everything separated - Instrument>pick-up>battery&lifier stages>box with transducers.
Maybe a foldable box like two semi-halves each with one 10".
I would focus mainly on one thing getting done ! Search also for class-D amplifiers running at 24 V - you can scrounge 50 W from a tiny beast and save batteries, as they're very efficient. Or you can go higher with the battery pack, like 36 or 48 V.
I can see feedback being a huge issue here. You probably won't ever need more than a couple of watts into some efficient speakers, as feedback will come in as you try to increase the volume further.
Chris
Chris
This is a stealth electric bass? You want concealed electrics? That's a tall order.
I'd think about building it on a rearward-firing subwoofer type box or boxes. Directionality is more vague in the bass. You still have the capacity to play quite high, so tuned enclosures might be too narrowband unless you used more than one. A horn exit doesn't necessarily give away a driver, so front-firing isn't necessarily excluded, it depends how unconventional an appearance you think will be tolerated. Wheels like a suitcase?
The whole assembly will need to be rigid or damped or perhaps involve some isolation to control mechanical feedback. Which leads to the question of weight.
I think it needs a research team or years of dedication on the part of an individual.
I'd think about building it on a rearward-firing subwoofer type box or boxes. Directionality is more vague in the bass. You still have the capacity to play quite high, so tuned enclosures might be too narrowband unless you used more than one. A horn exit doesn't necessarily give away a driver, so front-firing isn't necessarily excluded, it depends how unconventional an appearance you think will be tolerated. Wheels like a suitcase?
The whole assembly will need to be rigid or damped or perhaps involve some isolation to control mechanical feedback. Which leads to the question of weight.
I think it needs a research team or years of dedication on the part of an individual.
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