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matsj
07-13-2007, 12:20 PM
Im going to change my cinema/stereo setup in summer when my stuff arrives. Today i have 2405h/2382A+2446h/2226h/2245 and i feed my 2405h+2446h with a 5 channel Hypex ucd 180 Diy amp.
In the future im going to have 2435hpl with H9800 horns+ Le14h-3 and the 5 Le14h-3 are going to be driven of my 3 Crown K2 amps.

Now to the question. Im satisfied with my Hypex ucd 180 amp but i think i can get more of a better amp. How about a Crown D45 or a small Diy aleph to the 2435hpl drivers ?
I need 5 channels and im not made of money.

mats

Guido
07-13-2007, 04:13 PM
How about a small Diy aleph to the 2435hpl drivers ?

:yes:

www.rt-audio.nl (http://www.rt-audio.nl)

timc
09-20-2007, 11:37 AM
An Aleph will kick hypex's butt any day.

IMO UCD aint that good.

I have built an Aleph 1.2 and the mid/highs is awesome. But it cant controll a large woofer.

Best regards Tim

rs237
09-20-2007, 11:52 AM
hello mats

which you hold from a nice Tubeamp ?

regards

juergen

Ian Mackenzie
09-20-2007, 12:02 PM
You want need much power but the 1st Watt is so important with this approach.

The amp will need to be really quiet. I would use a nice CRCRC filter in the power supply of the Aleph 3. Even the diy mini Aleph is a good option. There are also some nice Jfet diy Alephs over at diy audio which are inherantly quieter because of the Jfet/smaller mosfet front end. otherwise the design is very similar. A beautiful amp.

Just make sure you have adequate protection capactor in series with the driver.

Ian

timc
09-20-2007, 12:15 PM
Will the First Watt projects be good for this application? They are made for high sensitivity speakers.

Best regards Tim

Ian Mackenzie
09-20-2007, 12:18 PM
Basically yes.

They are all a bit different so you would need to research the fine details.

Ian

timc
09-20-2007, 12:37 PM
If you have the possibility and/or cash you might want to try out some of the Audio Note's. Very pricy but high quality sound. They are known for very low noise.

Good luck in your search.

Best regards Tim

matsj
09-20-2007, 12:42 PM
Thanks for reply. I have tested a 6 watts Klass A DIY amplifier and im VERY pleased, no noice or hum.
Ill make 5 of them at this time.

http://www.audioheritage.org/vbulletin/showthread.php?t=18253

mats

rs237
09-20-2007, 01:18 PM
Thanks for reply. I have tested a 6 watts Klass A DIY amplifier and im VERY pleased, no noice or hum.
Ill make 5 of them at this time.

http://www.audioheritage.org/vbulletin/showthread.php?t=18253

mats


hello mats,

surely a good choice. If I may mark, you can reduce C2 to the value of the Protecktion Cap. I do not know your cross-over frequency, but 50-60F are sufficient reliably. Use no electrolytic capacitor better a good MKP = polypropylene Cap.

regards
juergen

matsj
09-20-2007, 01:24 PM
Thanks Juergen, im not so good in this .I just copy it from a friend and it works better than everything else i have tried. There is place for tuning.

Crossover freq will be around 800-1000 hz.

mats

rs237
09-20-2007, 01:39 PM
Hi mats,

ok , with 800Hz 50F is enough. A good MKP Cap is acoustically far superior to one electrolytic capacitor.

regards

juergen