Bridged Phase Linear series ll

[THD+N]

In theory, it should quadruple the output.

The "theory" is based a few factors... mainly power supply regulation, and amp design. The theory assumes the power supply voltage will not droop and that the amp has enough current gain to drive the load. Most power supplies will droop and the driver and output stage will have beta droop, so your output power will not reach the theoretical 4 times.

The 700 is speced at 350 8 Ohm and 500 4 Ohm, so 1100 mono at 8 Ohm is right where it should be.

 

[laatsch55]

Oh, I agree bud. The power supply is the limiting factor...

 

[VSAT88]

Damn Glen, These things dwarf the caps we use in the 700 wopl's...... I'm gonna need a bigger Chassis. I hope to work on my Mono Boards in the next couple days.... Just got a few components to change out. They should really Kick some ass in the 700 configuration. The 2 big torroids, and these big monstrosities, should help keep the rail voltage up and steady. I see a "Brown Out" happening soon.

View attachment 31378 View attachment 31377

!! HOLY MACKEREL!!

 

[WOPL Sniffer]

Are you gonna soft start these?

Yep, ya have to...... I've had the power supply up and running already....... the soft start boards work great.

 

[Northwinds]

This is an interesting amp, check out those cans. Can you guess the amp manufacturer? The transformer is enormous

 

[WOPL Sniffer]

Kenner?

 

[62vauxhall]

Output devices are inside that enclosure?

 

[grapplesaw]

My stock 700 Series ll that I tested in mono (years ago) put out 1100 Watts RMS into a single 8 Ohm load. This mono test was easy to implement with the AP System One because you can invert one channel from the AP to the amp. Then you simply use the 2 amp "hot" outputs for your load.

I used 8 amp fuses for the rails and I think I bumped up the main line fuse to 12 or 15 amp for the mono test. This info is in the 700B service manual. Nothing in the 700B about mono, but only regarding the supply and line fuses.

So I started to load test the 700-ll bridged amp today. Powers up fine till it blows main fuses not sure if I am up to increasing them as much as nick did.
I got 875 watts from it in Bridge mode into my 7.3 ohm resistor. The amp was quite cool.

yes Bob signed it to me using my first name.

 

[laatsch55]

Put the big boy panties on and put em in!!

 

[grapplesaw]

Put the big boy panties on and put em in!!

I will get some tomorrow

 

[laatsch55]

LOL!!

 

[WOPL Sniffer]

I will get some tomorrow

Panties or bigger fuses????

 

[grapplesaw]

Panties or bigger fuses????

Maybe both

 

[grapplesaw]

Sure enough 15amp fast blow are permitted by PL. just remember do at your own risk.

 

[J!m]

Cut an appropriate length of 1/4" copper refrigeration tubing, and install. Those rarely blow.