Polo Boom-box Bike

http://shop.41hz.com/shop/item.asp?catid=15&itemid=36

Since we are on the subject of electronics, anyone got some solder lead and flux?

Maplin.

http://shop.41hz.com/shop/item.asp?catid=15&itemid=36

You know I was checking out exactly those links last night? Sweet. Any of the Tclasschips are going to be ideal.

Amp10 from 41HZ isnt going to work with 12v, but the Amp6 kit is for sure. And its cheap. And that Boominator story suggests its loud enough. I was thinking we try out the Amp6 (or something TA2020 based) and if its not loud enough we upgrade..

Also, check out the 100w boards from Sure:

http://www.justblair.co.uk/sure-2x100w-tk2050-amplifier-first-impressions.html

Theres a 4 channel version somewhere too..Theyd work better off 24v, but there are a few 2xcar/scooter/etc battery PA systems that run all day, and theyre plenty loud.

Also, the Tclass stuff makes solar more realistic. If we're using this little power, we can get away with much less solar topup..

More important=good drivers. As in good=efficient=louder for less power..

efficient drivers are more expensive though...

Do we have a budget?

Polo trailer fundraiser barbecue?

Build Trailer/boombox/barbecue >> have fundraising barbecue to pay for it >> have free Trailer/boombox/barbecue for rest of eternity!

There are things we haz to buy. E.g Max wants 4130 for the frame. We need an amp. Probably plywood for the box/speaker enclosures. We need to make a barbecue somehow.

We'll also have running costs e.g. charcoal,spare tubes, electricity for the battery,etc (all these are small though).

I will cook Thai/Indo/Malay/Chinese/South East Asian food if the BBQ fundraiser happens, vege options included.

efficient drivers are more expensive though...

Do we have a budget?

Are these too big? :)

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=130503703998

yes...
costly electronics, battery, Plywood and BBQ... ...right, yeah why not!

This guy will solve most of your problems.

Jordan a inventé le tuning pour vélo - Vidéo Dailymotion@@AMEPARAM@@http://www.dailymotion.com/swf/video@@AMEPARAM@@video

yes...
costly electronics, battery, Plywood and BBQ... ...right, yeah why not!

Is your point that we should maybe keep the plywood, sulphuric acid and fire as far apart as possible? :)

This guy will solve most of your problems.

Dailymotion - Jordan a inventé le tuning pour vélo - une vidéo News & Politics

How the hell did you find this video, that is me... I'm baffled! haha
The hair, the french, and the oblivious look!

Eggpie: Elementary says I!

I was trying to find a picture of the one they had at the Melbourne Tourney, it was mahoosive and super sweet. Made by these guys.
http://cargonecouriers.com.au/

They had to have it on really quietly as the court was in a residential area though. And the music was shite.

Who chooses the music?

Oi! That was my pod once we got rid of the 'Australia Day music'!

That bike (and the music) were bloody amazing!

http://vimeo.com/21899517

Ha, there you are. The Oz day music was shite (IMO), so the pod and boom box saved it.

The bike is all shades of awesome for sure.

OT, is the video Rob took of the whole day online?

Dunno sorry.
...and you are forgiven! (Although ACDC was good.) #podwars

Today would be a perfect day for the poom-box (working title?).

YouTube - The Tough Alliance - Koka Kola Veins

YouTube - The Dictators - Who Will Save Rock and Roll?

Bangin' tune.

poom box sounds rude

not rude like rad but rude

ha, does that make it awesome?

i think so, yeah

I listened to a RZA(BobbyDigital) track yesterday with the lyric "Polo Frame" in it.

#boring

Hey guys - the speakers are sitting in Push. I had a quick look at the specs and only remember that they are 92db sensitivity. Sorry, I can't remember the impedance.

If we wire each side with a 3-series/3parallel array, they the sensitivity (efficiency} will go up a fair bit, without affecting impedance AFAICS. If they are 8 ohm, they a 5 parallel/2 series grid will reduce impedance to 3.2 ohm, which would help loudness without affecting the amp too much.

I reckon peizo (horn) tweeters would be good for top-end - we dont need a X-over for them, and they are quite efficient, though only a few are as good as regular tweeters in terms of fidelity / reproduction. cost 5-10 gn each

For low-end, a couple of high-efficiency 8-12inch drivers would be necessary. I have seen some available for 30-60 quid each that look promising. If we cheap out on these drivers, we will have to get more of them and do the same as for the mids (i.e. grid/array) Not ideal, as it means more weight and more baffling. Crossover is required, if not at least some signal filtering.

I have also been looking up some amp stuff online; the t-series amp6/9s from 41hz are very popular for portable setups, which means some of the research has been done for us. Efficient, run off 12v, small... the amp6/9 kit cost from 35-75 Euros depending.
If Jono's amp needs >12V after the transformer (most home amps txs are tapped at >30V it seems) then it might be a no-go without some more electronics, and that would be inefficient.
Does anyone have a car stereo that we can nick for testing? This would be less efficient, but at least get the music started ASAP.

Regd. power supply. The car battery is available, but it will die with deep cycling (designed to be topped up almost constantly.) Since it is virtually new, I am a loath to kill it so quickly. And lug it across London for the privilege.
I have a couple of SMART 6v Sealed Lead Acid batteries possibly somewhere that would be lighter and have a charger too. Perhaps the forum can supply more of these for free, as most people are using better batteries these days.
Ideally we would get hold of a SLA battery from a mobility scooter or similar from Maplin etc, which would be lighter than a car battery and we can parallel them if they capacity is not enough. cost 17-20 quid each.
Or a deep cycle battery from a boat (JB) would be good so we don't have to worry about efficiency too much... they cost more.

anyhoo... back to the sunshine.