Digital Amplifier Modules

[Mike Warren]

Does anyone know where I can obtain an ongoing supply
of digital audio amplifier modules that can produce about
100W or more into 8 ohms?

-Mike

 

[Phil Allison]

"Mike Warren" <miwa-not-this-bit@or-this-cairnscarsound.com.au

Does anyone know where I can obtain an ongoing supply
of digital audio amplifier modules that can produce about
100W or more into 8 ohms?

** Firstly - the proper name is Class D or "PWM" amplifier, such amps are
every inch analogue devices.

Now, does your idea of an "amplifier module" include an integral power
supply ?

Its not much use having a tiny and light power amp when you still need a
large and heavy PSU to run it.

I see a link to car audio in your email addy - so do you need 12 volt DC
operation ??

Is this for full audio range use - or just a woofer or sub woofer?

Supplying a few tiny details and a bit of context would have been nice.




.......... Phil

 

[Mike Warren]

Hi Phil,

Thanks for your response.

** Firstly - the proper name is Class D or "PWM" amplifier, such amps are
every inch analogue devices.

I think anyone who is able to help would know what I was talking
about. You certainly did.

I was really hoping someone would be able point me to a supplier
of these types of amps so I could see what was available off the self.

Now, does your idea of an "amplifier module" include an integral power
supply ?

Yes.

I see a link to car audio in your email addy - so do you need 12
volt DC operation ??

No. The unit they would be fitted to is powered by 240V AC.

Is this for full audio range use - or just a woofer or sub woofer?

Full range.

Supplying a few tiny details and a bit of context would have been
nice.

At this stage I am just looking into the feasibility of replacing our
current IC based system with something lighter and smaller.

-Mike

 

[Phil Allison]

"Mike Warren"

Hi Phil,

Thanks for your response.

** Firstly - the proper name is Class D or "PWM" amplifier, such amps
are
every inch analogue devices.

I think anyone who is able to help would know what I was talking
about. You certainly did.

** The term "digital amplifier" is misleading & highly ambiguous - so best
avoided.

"PWM amp " or "Class D amp" is clear and far preferable.

I was really hoping someone would be able point me to a supplier
of these types of amps so I could see what was available off the self.

** Hopin' and a wishin' ..........

Now, does your idea of an "amplifier module" include an integral power
supply ?

Yes.

I see a link to car audio in your email addy - so do you need 12
volt DC operation ??

No. The unit they would be fitted to is powered by 240V AC.

Is this for full audio range use - or just a woofer or sub woofer?

Full range.

Supplying a few tiny details and a bit of context would have been
nice.

At this stage I am just looking into the feasibility of replacing our
current IC based system with something lighter and smaller.

** Are my words invisible to you ??

That remark has no relation to my comment.

BTW

Your application must be a HUGE secret as you still will not give me a
clue what it is.

Your post reads like a dumb troll & I suspect you are after what does not
exist at the price you want to pay.


However - Powersoft in Italy make PWM amps with integral SMPS - but maybe
with more watts than you need.

http://pro-audio.powersoft.it/an_series_list.php?use_in=63&id_menu=213&id=10


The local agent is:

Production Audio Services Pty Ltd
Address: 17 King Street Blackburn, Victoria 3130
Phone: +61 3 98781444




......... Phil

 

[Leon]

Mike,

We carry such modules from LC Audio of Denmark. You can see more here:

http://www.soundlabsgroup.com.au/lcaudio/lc_audio_zappulse.htm

Please call me on (02) 4627-8766 during business hours to discuss your
needs.

Leon Gross
Soundlabs Group

 

[Phil Allison]

"Leon"

We carry such modules from LC Audio of Denmark. You can see more here:

http://www.soundlabsgroup.com.au/lcaudio/lc_audio_zappulse.htm

** OK - I see a tiny SMD covered PCB with a coil in the centre.

No power supply included, as the OP required.

The suggested mains transformer weighs 4 kg - so hardly light weight.

No case, no EMC shielding supplied.

I see some THD specs that make no sense - hiding more than revealing the
performance.

The tiny PCB alone is circa $300.


OTOH

Powersoft ( see my earlier post) can supply the "DigiMod 1000" - a
complete power amplifier including SMPS, in a case & fully EMC compliant and
ready to use with excellent specs. Only weighs 1.1 kg, all up.





........... Phil

 

[Leon]

"Phil"

No power supply included, as the OP required.

He said the unit it is to be mounted into runs off 240V, a simple diode
bridge and a two filter caps will provide a power supply from a 240V
transformer.

The suggested mains transformer weighs 4 kg - so hardly light weight.
If you need full power sure, but he only needs 100W, so a much smaller

transformer can be used.

No case, no EMC shielding supplied.
I did say it was a module, not a fully finished amplifier.

I see some THD specs that make no sense - hiding more than revealing the performance.
In what way? The measurements were done in Denmark, not by us, I'd be

interested to know so I can bring it up with LC Audio. Did you see the
datasheet with more info?

The tiny PCB alone is circa $300.
Well $275- actually which includes GST. We hope to have a lower price

soon when the next shipment arrives, about $225-. The module is quite
small, PCB itself was based on the size of a credit card, not bad for
an amplifier module (sans power supply) that can deliver 200W RMS into
8 Ohms, even more for the uprated version!

Anyway, Mike wanted to see what was out there, so I am showing him one
possible option!

Leon Gross
Soundlabs Group

 

[KLR]

On Sat, 27 Aug 2005 13:15:45 +1000, "Phil Allison"
<philallison@tpg.com.au> wrote:

"Leon"

We carry such modules from LC Audio of Denmark. You can see more here:

http://www.soundlabsgroup.com.au/lcaudio/lc_audio_zappulse.htm


** OK - I see a tiny SMD covered PCB with a coil in the centre.

No power supply included, as the OP required.

The suggested mains transformer weighs 4 kg - so hardly light weight.

No case, no EMC shielding supplied.

I see some THD specs that make no sense - hiding more than revealing the
performance.

The tiny PCB alone is circa $300.


Take a look at their preamp !

http://www.soundlabsgroup.com.au/lcaudio/lc_audio_sidewinder_pre_amp.htm

40,000uf filter capacitors for the preamp rails, and a switchmode
power supply (driven by the regular power supply.

I didnt know you would get any significant difference in the sound
quality by reversing the active and neutral in the mains plug !

OTOH

Powersoft ( see my earlier post) can supply the "DigiMod 1000" - a
complete power amplifier including SMPS, in a case & fully EMC compliant and
ready to use with excellent specs. Only weighs 1.1 kg, all up.





.......... Phil

 

[Phil Allison]

"Leon" <

"Phil"

No power supply included, as the OP required.

He said the unit it is to be mounted into runs off 240V,

** Quote:

" Now, does your idea of an "amplifier module" include an integral power
supply ?

Yes. "

The suggested mains transformer weighs 4 kg - so hardly light weight.

** The OP wanted lightweight.

If you need full power sure, but he only needs 100W, so a much smaller
transformer can be used.

No case, no EMC shielding supplied.
I did say it was a module, not a fully finished amplifier.

** The OP wanted a finished amplifier PLUS

A SMD PCB alone is not a "module".

I see some THD specs that make no sense - hiding more than revealing the
performance.
In what way?

** Your problem you cannot interpret basic specs.

The tiny PCB alone is circa $300.

Well $275- actually which includes GST. We hope to have a lower price
soon when the next shipment arrives, about $225-. The module is quite
small, PCB itself was based on the size of a credit card, not bad for
an amplifier module (sans power supply) that can deliver 200W RMS into
8 Ohms, even more for the uprated version!

** It is an overpriced gimmick - at best.

It totally totally fails to meet the essential requirements of light weight,
low cost and being even a legally usable product.





........... Phil

 

[mike]

I have to say it looks small and clever but the prices are crazy no
realistic gripof the market place, 2 channel modules are available for
$30.00 so asking $275.00 is ridiculous. Also PSU,s are available that
weight ounces rather than KGs
"KLR" <kenreed1999@yahoo.com> wrote in message
news:khm4h1h7p10b7cpng9pf1bj8pptr9robus@4ax.com...

On Sat, 27 Aug 2005 13:15:45 +1000, "Phil Allison"
philallison@tpg.com.au> wrote:


"Leon"

We carry such modules from LC Audio of Denmark. You can see more here:

http://www.soundlabsgroup.com.au/lcaudio/lc_audio_zappulse.htm


** OK - I see a tiny SMD covered PCB with a coil in the centre.

No power supply included, as the OP required.

The suggested mains transformer weighs 4 kg - so hardly light weight.

No case, no EMC shielding supplied.

I see some THD specs that make no sense - hiding more than revealing
the
performance.

The tiny PCB alone is circa $300.


Take a look at their preamp !

http://www.soundlabsgroup.com.au/lcaudio/lc_audio_sidewinder_pre_amp.htm

40,000uf filter capacitors for the preamp rails, and a switchmode
power supply (driven by the regular power supply.

I didnt know you would get any significant difference in the sound
quality by reversing the active and neutral in the mains plug !


OTOH

Powersoft ( see my earlier post) can supply the "DigiMod 1000" - a
complete power amplifier including SMPS, in a case & fully EMC compliant
and
ready to use with excellent specs. Only weighs 1.1 kg, all up.





.......... Phil