Newbie Pass amp Select

[Anthony77]

I am a Newbie and planning to build My one Pass amp.

My speaker System as below:

tweeter JBL 075
Mid JBL LE85
Low JBL LE15a

All is 8ohm

I am interesting in SOZ and I have a +-18VAC 1000VA

can use for a 15W SOZ.

But Just 15W can Push the system or not?

my home have about 180sq. ft.

which Pass amp is best choice for me?

Which have Best Low and high freq. Respond?


thanks all!

 

[paulb]

But Just 15W can Push the system or not?

Build one and find out! You have the transformer anyway.

 

[roddyama]

Hi Anthony,

Welcome to the forum.😀

Your speakers are pretty efficient. You should get plenty of volume driving them with 15W.

That said here are a few things to think about.
The Zen amp have been accused of being a little light in the bass. You may like to think about bi-ampping using the Zen for the horns.
The transformer you have will work fine for an Aleph 3 as well (a little overkill, but that good). The Aleph will have better PSU ripple rejection then the Zen. This is good particularly if you decide to bi-amp. If you don't bi-amp, the Aleph should provide better bass and 30W of power.

Rodd Yamashita

 

[Anthony77]

I have 2 Big Heat Sink
350X50X260

How is Max Power i can make My SOZ??

Which Aleph is the Best?
i all so have 2 700VA bi-polar 35VAC Transfromer can make Aleph2

Aleph 3 have 30W, it use 1 pair of IRFP244?

is it enough for my home Area?
some times i like to listen Powerful =)

Aleph 2 is too large power?

I want to Bi-amp to Push.
SOZ to push the tweeter.
I think SOZ is the best for H.freq. in pass amp.
is it right?

 

[Nelson Pass]

Based on your picture, I would recommend an Aleph 3 or 30
with 2 pair of devices a side. The transformer is perfect for
this, and you'll get enough punch for an LE15A

 

[halojoy]

Anthony77

With those things from your picture
at home
I think you need no Christmas Gifts

Happy New Year! 😉

 

[Variac]

Halofunswe is right! You have toooooo many GREAT transformers.


It seems the opinion around here that a 15 watt SOZ is about as big a size as practical Also around here we tend to do what Nelson tells us to, so I would take his advice, But I suspect he is basing that on the size of your heatsinks, which amazingly are not enough for an Aleph 2. Your drivers are quite efficient, so I agree that you will be OK with smaller amps-even if you listen loud!

Does the SOZ sound the best on high frequencies? I suspect so, what do you others say? It is natural to think of it for use as a high frequency amp.

Check out the X-SOZ thread. It is getting good reviews, and it is easy to convert to "X" either now or later.

Welcome to our wierd world!

 

[blank527]

Hi,

About those heatsinks..
I'm currently building an stereo aleph 60 with heatsinks at a size of 320x300x40 (black anodized) per each.
The heat dissipation of this amplifier is stated as 240 watts.
Seeing the size of these sinks i'm afraid my sinks will not be enough to withstand the required heat-dissipation.
I'll post my pictures shortly.
Can someone tell me if these heatsinks will give me enough heat-dissipation for the aleph 60?
Thank you,
Remco.

 

[herm]

blank257;

Here is an Aavid part that is similar to your sink.

Aavid

They calculate based on a single point source of heat,
but you will have multiple sources, so your thermal
resistance should be a little better.

Anyway, 120 watts into a .31 degree/watt sink seems
a little hotter than is generally accepted around here.
I don't think you will have part failure problems, but it
is not something most people want in their living rooms...


herm

 

[Anthony77]

Thanks! Mr Pass and all helpers!

How About Aleph X??
it seem Great.
How is the Power of this?

I don't want use Pre-amp. is it ok for the SOZ, Aleph, Zen or Aleph X?

thanks!