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SDA-400 Professional multi-way

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#321
danny_66 said:
Hi Roberto,

I'm planning to use the DPS-500/S-64 SMPS for The First One amplifier.
It looks like a nice match.

Do I order it with the webshop?

Regards,
Danny
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Hi Danny,
There is no doubt that the "coupled" is a winner. a fast amplifier with low output impedance + fast response of smps (according to the transient current), can truly offer a new perception of dynamics. I add, as explained on the thread (DPA-400 pressure. ..), this new "effect" is immediately audible even at 25% of volume.

Today fortunately, there are many people who can confirm this, not only as a practical effect, but also theoretically, according to our studies on the corner of the peaks which represent the envelope of sound, responsible of the air particles having accelerated, then spl product.
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Well, I think it is right to clarify, given the pm and email receipts for the DPS-500.

I can provide at DIY with great discount only DPS-500/DA, as in the picture on this thread but the maximum voltage can be + /-52V (48-52V).
Other versions, such as "S" can be purchased on the shop according to the amount available (it is best to check first).

At 52V, considering the loss of the pair MOSFET at 4R, we can get (SIN continued) 288W and 310W with burst.
Depends on the use you want to do with the amp, eg.multi-way, may be satisfactory saving money.
DA / and "S" version use same pcb, change Power-Unit and the values ​​of some components.
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Well, perhaps it may be an opportunity to open a new thread dedicated to the DPS-500, given that, as promised, I have some special dynamic measurements on the DPS-500 where you can see a lot of new parameters that interact with the operation of the amplifier.

Regards
 
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#326
pinnocchio said:
Roberto,

What will be the major difference between this new amplifier (Eva?) and the current series?

Ciao!
Do
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Hi Dominic,
Good question .. to answer in full, it would take 4 A4 pages . 😛
I have no other production in analog amplifiers , such as Class A-B .

EVA "XX , Vector, Amplifier" is based on a new concept that inherently solves some issues as:
Linearity DC , Transient Linearity : (Just see the rise / fall time , are identical or triangular sweep for DC linearity , just for example)
Efficiency.
Cross Point distortion: Equal or better than a big Class A, but obtained with low bias ( becouse the transition threshold ,not increase transversal current ) .
Bias and Offset: set automatically according to external parameters .
The new concept is based on the total independence of the two sides of the amplifier , this means that the audio transients are free to provide power, each with their own speed limits and power devices using the same ( N -channel MOSFET )

Feedback: ( crucial point of choice) :
my knowledge on Circuits and envelopes sound from musical instruments, want not there a feedback between the output and the input , then this amp is based on multiple local feedback .
The only relationship between the output and the input , ( but independent side) is the output current .
That's why I said " amplifier is designed by audio transients ."
We can not continue to measure amplifiers with symmetrical signals , perfectly balanced , when in fact they are unbalanced and modulate the current , even for long lengths of time from one side only .
I want to make a version for Amateurs who uses a good input transformer on the pcb . This lowers the cost compared to the version for high-end market .
In anticipation of this new architecture , I designed an smps derived from DPS -500 / S, with the same philosophy , fast response to transients but with 2 Independent Power Unit - regulated (one per rail Vcc)
it's called " Nexus Vxx "
The availability of EVA and the Nexus Vxx, it is expected between 30-40 days max. (this week begins production at our services, All components have already been purchased) . 🙂
This new circuitry also, opens new avenues of employment, being isolated amplifier, (does not have a gnd COM) and is independent of the supply voltage.
AudioPower owns this project and it is likely that the version for markets, incorporating as integrated, the Nexus smps, especially for high powers.

My job finish at the moment that put in production one products,then now i can focus on other project.. 😀

Regards
 
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#328
Hi Roberto,

Package arrive safe and sound! Very well packed btw!

Can you direct us where to get the connection diagrams pinout for each devices?

2014-01-13%252014.56.38.jpg



Question for you, are the DPS-400 limited in power like you had explained in a previous post and we just needed to change a resistor? Or was it the amps?

Thanks
Do
 
#330
Hi,
These beautiful photo encourage me, as well as the news that others have received the package at this point look forward Alexander from France. 🙂

For connection diagrams of the DPS-400 and / or SDA-400, I'm working on this today, so expect to connect.
Pinnocchio: I sent you 4xPBTU-3, two use ELNA capacitors (2x5000uF) is reserved for the beautiful 4-channel SDA-400. the other two, (at this moment as extra), are for the DPS-400, for class AB. as others have 2x10000uF (nice caps well tested).
To recognize the two DPS-400 for SDA-400 amps, you just see the presence of the LM317 at the corner of the PCB (AB class version not have).
Only dps-400 as section of MDA need to change value of res.

as general info: please, not changing anything, I know how to get the maximum possible, and it's already been done. this in all my products.
Bertrand: Thank for shared the deliver, a photo require of your version 120Vac.:smash: USA Diy want see well.
thank for precision in paymets also.

Feel the lack of Tinitus ... perhaps caught fire with MDA-400? ? 🙂

Regards
 
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#331
Hi,
Another general info, maybe it helps to know us better.

I think it is visible how much extra care , it is done in these products.
The components that you will find on these products, are exactly the ones visible in the picture, I have no reason to put some good in the picture, and then change the product sold.
I would add if you allow , these products use components selected for the simple reason that they are purchased in quantity. just as example, we use ELNA from 10uF to 1000uF100V , the average amount purchased is 25000pz at a time.
Some may think that change with poor caps to save money?
For your assurance , I'm the type of person who opens the electrolyte after they are measured well. put on product ONLY if is good independant what quote the market.
Well, some that want ELNA (for 120Vac only), I can replace with 1000uF63V as other have in 230V version of DPS-400.
Unfortunately the ELNA has no 22000uF with the same diameter for the pbtu-3.
 
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#332
working hard to construct another box :smash:

first one was mono for my bass guitar
and since the next is stereo, I thought they should look similar
and this way also be able to form a stereo music system with mono sub

and I am searching a hifi bass EQ
 
#334
I was also looking at Thel
there is a new sub high pass filter with eq
expencive, but affordable

Esp also have special subwoofer graphic or parametric eq
I'm not after very low bass
one of those might be a good idea
just want to extend it a bit, and smoothly
 
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