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Class D Switching Power Amplifiers and Power D/A conversion

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Old 10th December 2009, 06:44 AM   #51
MOER is offline MOER  United States
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Join Date: Aug 2003
Location: SIMI VALLEY CA
Default Watts RMS

Sorry Lars bit I missed nothing. Power is volts x amps OR volts x volts /impedance OR amps x amps x impedance and in each of the above three equations there is an RMS number multiplied by an RMS number and again I repeat, RMS x RMS cannot equal RMS.

So there are no such things as "watts RMS". Read the paper Bose put out in the 70's regarding this issue
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Old 10th December 2009, 10:53 AM   #52
wahab is offline wahab  Algeria
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Join Date: Nov 2009
Location: algeria/france
Quote:
Originally Posted by Michael-Rifa View Post
This amplifier is manufactured in Thailand, designed by my self and the R & D team from the firm TAFN ENGINEERING CO.,LTD

D-TECH 2400 is a highly reliable advanced CLASS-D power amplifier capable of delivering high power over the whole audio band without overheating in a very small size. At the same time it is capable of reproducing sound with outstanding clarity and stability like never before possible with conventional amplifiers.

So far for what i hear, no other PA amplifier of this size and weight can match the power and sound quality.

( D-TECH 2400 ).
ok for power efficency, wich is normal for a class D amp, but, please,
no more marketing hype, as it s evidence that it s no better than
conventional designs in matter of sound performance...
it s even worse in distorsion by several magnitude orders...
i found your claims somewhat ridiculous..
no pun intended, but the numbers talks by themselves and you re
providing the sticks to be bitten with...

ragards,

wahab
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Old 11th December 2009, 09:09 PM   #53
Hansa is offline Hansa  Germany
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Join Date: Dec 2009
Default "RMS power" - a meaningless word, almost used in advertising

To whom it may concern: please read this article Hi Fi Writer - Meaningless RMS power
The word RMS reminds me of ads which name below-average HiFi products as "studio" or "professional" equipment and called a 15 watts amp a 150 watts amp (short time pulse power and both channels added). Even the unit "Watt" is actually wrong concerning AC and loads with capacitive, inductive and ohmic rates; the correct unit should be VA

So this D- amp may be powerful and may sound very good, but the word RMS shouldn't be used by a technician (but a salesman should use it, lol!)

Regards
Hans
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