hey guys!!! I need help with my 300 watts subwoofer amp

Dragonslayer · 15th January 2012, 05:10 PM

I'm pretty sure you all are familiar with the Australian wonder who designs circuits (Rode Elliot) his website (sound.westhost.com/).
I've tried some of his PCB's and they are pretty good. Now I'm attempting his 300w subwoofer amp, god i hope someone here built it before

the setup I'm running has a power supply very beast 600VA (56-0-56VDC), 8 power transistors (MJLs) in all (his high power version), probably some of you guys know if your familiar with P68 I'm allowed to use up to 70 Volts with the extra transistors, i have a 2 channel setup.
Questions:
*do you think I could safely bridge this amp into 4ohms? using the 56VDC and the 8 power transistors on each channel
*do you think this amp could be stable down to 2ohms each channel with the mentioned supply voltage.

regards,
Mr.Dragon

Dragonslayer · 16th January 2012, 12:03 AM

bump

wintermute · 16th January 2012, 12:46 AM

Hi, If you have bought pcb's off Rod, then you should be able to access his forum, and ask questions there. Probably no where better to get the answers than from the designer

Tony.

Dragonslayer · 16th January 2012, 07:38 AM

I sent an email to him a few days ago and im still waiting

djQUAN · 16th January 2012, 09:49 AM

I have successfully ran his P68 on 2 ohms before but that was using 5 pairs of MJ15003/4 transistors which are 250W on 50V rails.

15th January 2012, 05:10 PM	#1
Dragonslayer diyAudio Member Join Date: Jan 2012	hey guys!!! I need help with my 300 watts subwoofer amp I'm pretty sure you all are familiar with the Australian wonder who designs circuits (Rode Elliot) his website (sound.westhost.com/). I've tried some of his PCB's and they are pretty good. Now I'm attempting his 300w subwoofer amp, god i hope someone here built it before the setup I'm running has a power supply very beast 600VA (56-0-56VDC), 8 power transistors (MJLs) in all (his high power version), probably some of you guys know if your familiar with P68 I'm allowed to use up to 70 Volts with the extra transistors, i have a 2 channel setup. Questions: do you think I could safely bridge this amp into 4ohms? using the 56VDC and the 8 power transistors on each channel do you think this amp could be stable down to 2ohms each channel with the mentioned supply voltage. regards, Mr.Dragon

16th January 2012, 12:46 AM	#3
wintermute just another diyAudio Moderator Join Date: Aug 2003 Location: Sydney Blog Entries: 22	Hi, If you have bought pcb's off Rod, then you should be able to access his forum, and ask questions there. Probably no where better to get the answers than from the designer Tony. __________________ Any intelligence I may appear to have is purely artificial! Some of my photos

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16th January 2012, 12:03 AM	#2
Dragonslayer diyAudio Member Join Date: Jan 2012	bump

16th January 2012, 07:38 AM	#4
Dragonslayer diyAudio Member Join Date: Jan 2012	I sent an email to him a few days ago and im still waiting

16th January 2012, 09:49 AM	#5
djQUAN diyAudio Member Join Date: May 2004 Location: manila	I have successfully ran his P68 on 2 ohms before but that was using 5 pairs of MJ15003/4 transistors which are 250W on 50V rails.

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