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Old 18th October 2003, 10:33 PM   #91
darkm4n is offline darkm4n  Romania
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And i forgot .. the Marantz it's on tube , it has lot of small tubes and 4 big tubes , nothing writen on them .. and some very big capacitor's there .. no name .. no nothing ..

P.S. the tubes are inside
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Old 19th October 2003, 03:05 AM   #92
li_gangyi is offline li_gangyi  Singapore
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So ypou only need 120W tops right?? perchannel...I guess the schematic here might be something that you want to consider
http://xedox.de/120_watt.jpg
or try the leach amp athttp://users.ece.gatech.edu/~mleach/lowtim/
if you only need a 100 watts...here's a good one at
http://sound.westhost.com/project3a.htm
It has been built by many here...and I'm sure they can help you along the way...the current amp I'm building is the LYNX amp at
http://www.audio-circuit.dk/LYNX_main.html
It has a max power rating at 125W...but you could lower it by using slightly lower voltage rails...
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Old 19th October 2003, 07:46 AM   #93
darkm4n is offline darkm4n  Romania
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Default Ok ..

I was needing an 300 W amplifier for a new subwoofers ( corner's front ) that have about 280 W RMS 8 OHM , horn load wint many many folding's ... with a clear 20 Hz - 120 Hz response ...

My kit's will come tomorow , i promise a photo of the amp , a schematic of the kit's with may be something intersting , how to get 350 W from 40 V rails and specs about the amp , matching speaker's

bye
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Old 19th October 2003, 07:59 AM   #94
li_gangyi is offline li_gangyi  Singapore
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Hiyee,
it's almost impossible to get 350 W from 40 V rails...unless you are talking about dual 40VAC rails...which when rectified would give you approx 59V rails...that would give you enoguh headroom for a 300W or more amp...a schematic here...
http://sound.westhost.com/project68.htm
I would imagine that you could bridge 2 amps to give you 300W...but you must be careful here...as each amp will see 4Ohms as the load if your subwoofer was originally 8Ohms...and do make sure you do NOT ground any side of the woofer...which would definetly destroy the amps if you did so...I would suggest that you do a bit of reading and research and getting aqquainted to amps and build a few lower power ones before you step right in and build such a big one...300W is a tad too much for home use..I would imagine this is for some outdoor activity???
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Old 19th October 2003, 08:07 AM   #95
darkm4n is offline darkm4n  Romania
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Default Nope

I like power )

In my room , witch is 5 meter by 5 meter i have all this power , including the 500 W speakers and the rest of the sistem , but i can't even listen at 1/4 of the volume because blood from my nose came out ... last time i try 1/2 of the volume ... but .. now i'am also interseted in a speaker schematic for a good 800 W rms 8 ohm driver ... 18 inch eminence to match with the Crown 5000
because i think it give at least 800 x 2 ...
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Old 19th October 2003, 08:28 AM   #96
li_gangyi is offline li_gangyi  Singapore
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Going to 800W would mean you need to have a really deep pocket which even I cannot afford...due to the expensive trafos needed...and not to mention the frequent headaches you will experience when u on the amp...wonder if you have cracks on your walls already...800W is just too much for a 5 by 5 room...unless your speakers are really ineffiecient...like 1db per watt...800W will give you 800Db...which is KILLING...I dunno about a 800W schematic anywhere...unless you bridge two 300 watters together...which would give you 600W...even 300W is the max power I have seen in concerts outdoors...okok...maybe those during national day are bigger...but why would you need them in your room...if you are not gonna use the full potential of the amp you might as well not build it...that's my opinion anyway...and take care of your ears ok??Anyways...here's a link for an amp that goes 360W...but you really need a lot of cash to get all the MOSFETs...
http://users.swing.be/edwinpaij/ampli_mosfet_360_w.htm
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Old 19th October 2003, 09:57 AM   #97
darkm4n is offline darkm4n  Romania
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Yup .. i got cracks on my wall .. but i mask them with posters ... one of them can be seen on the outside of the wall .. but .. i don't really care ..

I have a 800 x 2 Amp , that's not the problem , the speaker's is the problem , i need a good cabinet design for them .. not for the amplifier ...

The speakers are :

http://editweb.iglou.com/eminence/em...akpro/om18.htm

with a good 95 dB at 200 Hz
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Old 19th October 2003, 10:02 AM   #98
darkm4n is offline darkm4n  Romania
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Why i have so much power in my room ?

Because me and my brother are renting for party's , concert's , weding's , etc
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Old 19th October 2003, 11:21 AM   #99
SkinnyBoy is offline SkinnyBoy  Australia
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Default Re: Nope

Quote:
Originally posted by darkm4n
I like power )

In my room , witch is 5 meter by 5 meter i have all this power , including the 500 W speakers and the rest of the sistem , but i can't even listen at 1/4 of the volume because blood from my nose came out ... last time i try 1/2 of the volume ... but .. now i'am also interseted in a speaker schematic for a good 800 W rms 8 ohm driver ... 18 inch eminence to match with the Crown 5000
because i think it give at least 800 x 2 ...
I think you have enough... I am personally not willing to help you anymore.. its just silly... I have some rather crappy speaker boxes... 91dB 1w/1m 90watts rms... I run them off a 50watt amp, and am able to get all the furniture in my room vibrating... its a 3m X 3m room however... anyway.. I'm working on a 75watt per channel @ 4 ohm, 8 channel amp next... lol in theory it should bridge to give 300watts into 2 channels, into an 8 ohms speaker...
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Old 19th October 2003, 11:25 AM   #100
darkm4n is offline darkm4n  Romania
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Wanna buy some speakers ?
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