I'm looking for some way of building a couple of portable (think "I can
lift it and carry it upstairs in one hand") active speakers for use
with keyboard and/or bass guitar for occasional gigs. I anticipate
using a seperate preamp. There are a few 100w modules about (built a
Maplin one a while back) but anything more like 300w? I'm thinking of
reproducing a Roland Cube or Polytone type cabinet with 12" or 15"
speaker. All ideas welcome. Andy

In article . com,
Andy Evans wrote:
I'm looking for some way of building a couple of portable (think "I can
lift it and carry it upstairs in one hand") active speakers for use
with keyboard and/or bass guitar for occasional gigs. I anticipate
using a seperate preamp. There are a few 100w modules about (built a
Maplin one a while back) but anything more like 300w? I'm thinking of
reproducing a Roland Cube or Polytone type cabinet with 12" or 15"
speaker. All ideas welcome. Andy

To reduce weight you'll be into an SMPS and that's likely to be more of a
problem kit wise than the amp itself. Like all such things a ready made is
likely cheaper than a kit anyway.

--
*No radio - Already stolen.

Dave Plowman London SW
To e-mail, change noise into sound.

How about these:

http://www.hypex.nl/docs/UcD400_datasheet.pdf

I've never put a bass or keyboard through a digital amp - any ideas how
suitable these are for stage use?

Andy Evans wrote:

How about these:

http://www.hypex.nl/docs/UcD400_datasheet.pdf

I've never put a bass or keyboard through a digital amp - any ideas how
suitable these are for stage use?

The hypex modules are supposed to be one of the very best Class-D
implementations around.

Graham

"Andy Evans"

I've never put a bass or keyboard through a digital amp - any ideas how
suitable these are for stage use?


** Watch out - many Class D power amp modules have truly HORRIBLE sound
when driven close to or into clipping.

The ones used in the Zech S3A sub box being prime examples - makes a noise
like the cones have rips in them.



........ Phil

Phil Allison wrote:
"Andy Evans"

I've never put a bass or keyboard through a digital amp - any ideas how
suitable these are for stage use?


** Watch out - many Class D power amp modules have truly HORRIBLE sound
when driven close to or into clipping.

The ones used in the Zech S3A sub box being prime examples - makes a noise
like the cones have rips in them.



....... Phil

Thanks for the warning, Phil! I might go ahead and experiment -
presumably I can double them up? Andy

On Sat, 09 Dec 2006 02:30:16 -0000, Andy Evans
wrote:

How about these:

http://www.hypex.nl/docs/UcD400_datasheet.pdf

I've never put a bass or keyboard through a digital amp - any ideas how
suitable these are for stage use?


The designer, Bruno Putzeys, has his own forum on Pro Sound Web at
http://recforums.prosoundweb.com/index.php/f/45/5267/ so it might be worth
sending a message to him to see what he thinks. I can't see any reason why
they shouldn't work.

Cheers

James.

James Perrett wrote:
On Sat, 09 Dec 2006 02:30:16 -0000, Andy Evans
wrote:

How about these:

http://www.hypex.nl/docs/UcD400_datasheet.pdf

I've never put a bass or keyboard through a digital amp - any ideas how
suitable these are for stage use?


The designer, Bruno Putzeys, has his own forum on Pro Sound Web at
http://recforums.prosoundweb.com/index.php/f/45/5267/ so it might be worth
sending a message to him to see what he thinks. I can't see any reason why
they shouldn't work.

Cheers

James.

Well, I've obtained a couple so we should find out when I have a chance
to build them. Andy