Mosfet amp, 5 pairs IRFP240/9240 - Page 10

SY · 17th June 2011, 11:54 AM

Since this is apparently promotion and discussion of a commercial amplifier, I have moved this thread to the appropriate area. The OP and person selling amplifiers, Federmann, will keep all of his future promotions and discussion to this thread.

jan.didden · 17th June 2011, 02:14 PM

Quote:

Originally Posted by Federmann

Example specifications

Clearly wrong. With +/-50V, you cannot get 1000W in 4 ohms. With +/-60V you cannot get 800W in 8 ohms.
Makes me wonder how real the other numbers are.

jan didden

PMA · 17th June 2011, 02:31 PM

Similarly.

Federmann · 17th June 2011, 02:51 PM

±60V, two modules, 230Vpp, (81V/8Ω)
±50V, two modules, 190Vpp, (66V/4Ω)

jan.didden · 17th June 2011, 03:56 PM

Quote:

Originally Posted by Federmann

±60V, two modules, 230Vpp, (81V/8Ω)
±50V, two modules, 190Vpp, (66V/4Ω)

Really? So how can the average then be 100W in 4 ohms and the max 1000W in 4 ohms? What's the difference between the 300W and the 1000W number? How did you measure it?
Same questions for 8 ohms, please.

jan didden

Federmann · 07:53 PM

Quote:

Originally Posted by Federmann

120Vpp/4Ω

One module, ±66V

Federmann · 04:51 AM

Quote:

Originally Posted by janneman

Really? So how can the average then be 100W in 4 ohms and the max 1000W in 4 ohms? What's the difference between the 300W and the 1000W number? How did you measure it?
Same questions for 8 ohms, please.

jan didden

300W and dynamic headroom 5dB = 1000W
100W and dynamic headroom 10dB = 1000W

B. Federmann

Upupa Epops · 18th June 2011, 06:47 AM

With Federmann, you will digest many surprises, Jan...he has his own physical units and special definitions....

Troton · 18th June 2011, 02:25 PM

Upupa means so called Federwatts

Like you could see one post above - "300W and dynamic headroom 5dB = 1000W".

Federmann · 19th June 2011, 03:37 PM

No comment perys | seznam alb ? rajce.net

17th June 2011, 11:54 AM	#91
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	Since this is apparently promotion and discussion of a commercial amplifier, I have moved this thread to the appropriate area. The OP and person selling amplifiers, Federmann, will keep all of his future promotions and discussion to this thread. __________________ If there's a sucker born every minute, where do the rest of them come from?

17th June 2011, 02:31 PM	#93
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	Similarly. __________________ Pavel Macura http://www.linkedin.com/pub/pavel-macura/4/783/637 http://web.telecom.cz/macura/audiopage.html

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17th June 2011, 02:51 PM	#94
Federmann diyAudio Member Join Date: Oct 2009 Location: Kunovice - Moravia	±60V, two modules, 230Vpp, (81V/8Ω) ±50V, two modules, 190Vpp, (66V/4Ω)

18th June 2011, 06:47 AM	#98
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	With Federmann, you will digest many surprises, Jan...he has his own physical units and special definitions....

18th June 2011, 02:25 PM	#99
Troton diyAudio Member Join Date: Sep 2005	Upupa means so called Federwatts Like you could see one post above - "300W and dynamic headroom 5dB = 1000W".

19th June 2011, 03:37 PM	#100
Federmann diyAudio Member Join Date: Oct 2009 Location: Kunovice - Moravia	No comment perys \| seznam alb ? rajce.net