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Old 3rd February 2009, 09:11 PM   #41
rhysh is offline rhysh  United Kingdom
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I have got a deal for the price break we require, just need 20 more pcb's to be taken.
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Old 4th February 2009, 08:01 AM   #42
rhysh is offline rhysh  United Kingdom
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Just to let everyone know, i will do ALL your SMD soldering for $5 (to cover the cost of solder and time), plus the price of the resistors.
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Old 4th February 2009, 12:31 PM   #43
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Default Can These Be Used For A PA Amp?

Hello Everybody,

Has anybody tried to use a BPA300 design for a PA system? The speakers would be 8 ohms but could be changed to 4 ohms since I haven't built them yet. I want an amp that has some power but enough headroom to reduce clipping. if there is a problem with the amp, being homemade they would be easier for me to fix (I would already have repair parts). Live PA work doesn't require high end sound quality but the equipment does need to be robust. Will this fit the bill? I'm thinking some sort of soft start, speaker protection, a stepped attenuator front end with hi Z and balanced inputs would be all that is needed, any comments? Oh ya, I know it would be cheaper to buy some Crown DC300's but this will be a lot more fun not to mention the bragging rights.

Thanks,

Mark
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Old 4th February 2009, 06:06 PM   #44
rhysh is offline rhysh  United Kingdom
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Home audio and PA should never be crossed, unless for personal use due to health and safety risks. You dont want to be held responsible for a venue burning down becuase your amps dont have the required safety features. This has been discussed mant times on the forum but i will leave it up to you to decide.

In theroy, the amplifier will be fine for light PA use. Use overkill heatsinks and an oversized power supply.
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Old 5th February 2009, 02:42 AM   #45
TS Lo is offline TS Lo  Hong Kong
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Quote:
Originally posted by rhysh
I have got a deal for the price break we require, just need 20 more pcb's to be taken.
Hi Rhysh,

I like to join this GB for 4 boards.
Wiki updated.

Quote:
Originally posted by rhysh
Just to let everyone know, i will do ALL your SMD soldering for $5 (to cover the cost of solder and time), plus the price of the resistors.
Please advise total costs of the SMD resistors/capacitors
if I need your help to solder them on board.

Cheers

TS
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Old 5th February 2009, 07:07 AM   #46
rhysh is offline rhysh  United Kingdom
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Hi, i will update the price for the resistors when i have looked into it a bit more. I am thinking about supplying kits, with the option of pre-soldered SMD resistors.
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Old 5th February 2009, 07:12 AM   #47
rhysh is offline rhysh  United Kingdom
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Can i just ask how many people would be intrested in a kit? Price would be around $125 per monoblock, to populate a pair of PCB's.
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Old 5th February 2009, 08:10 AM   #48
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when you say kits, do you mean parts only? or parts & pcb's?

I would be definitely interested in parts only for 4 boards

regards
Evan
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Old 5th February 2009, 08:25 AM   #49
rhysh is offline rhysh  United Kingdom
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Quote:
Originally posted by chatziva
when you say kits, do you mean parts only? or parts & pcb's?

I would be definitely interested in parts only for 4 boards

regards
Evan

Parts only, as this is a group buy anyway people will be supplied with boards to use with the kits

Not a problem as you allready have yours.
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Old 5th February 2009, 08:33 AM   #50
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great stuff, count me in for parts for 4 boards then

i was looking at farnell the other day and noticed that the susumu 0.1% resistors are quite good value. however that's true for small quantities, you might be able to strike a good deal on welwyn or vishay resistors depending on demand quantities

best regards
Evan
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