RSD 1200.1

350sbc · Post by **350sbc** » Tue Jul 13, 2010 9:30 am

Hey everyone, this is going to be a dumb question or 2 here but i just bought a RSD 1200.1 brand new and for the speaker outputs in the manual says it's suppose to have 4 outputs (2 channels) even though it being a mono block, and my octane r 8.0:1 is a mono block with 2 channel output so you can bridge it, nw my question is this RSD is 2 ohm and 4 ohm stable, but how does the amp determine wether it is a 2 or 4 ohm load? really guess what i'm trying to say too is how the heck do i know i'm running 2 ohms into my setup since it's already wired for 2 ohms. btw 2 boston g2 10's dvc and also have a 12 i want to run as well until i can get another matching pair. sounded pretty nutty on the octance r. and input would be greatly appreicated thanks!

Post by **stipud** » Tue Jul 13, 2010 9:36 am

Most PG monoblocks have 2 inputs to make it easier to hook up two subs. They are simply run in parallel, so if you had two 4 ohm subs hooked up, it would be a 2 ohm load on the amp.

350sbc · Post by **350sbc** » Tue Jul 13, 2010 10:02 am

so moreless the amp is setup internally to handle either 2 or 4 ohm without bridging any connections? just find it weird because my octane r 8.0:1 i just temporary retired for the RSD amps (mono and 4 channel) had the dual outputs so can run 2 channels or bridge for the 600 rms. just confussed as to why pg would include a manual for a 2 channel saying to bridge it for the 1200 wrms. to say the least it pounds cleaner than the octance r but i'm not about to turn anything up much higher because i jsut fried the fuses on my bostons like 10 mins ago on a bass test cd

dedlyjedly · Post by **dedlyjedly** » Tue Jul 13, 2010 10:09 am

The Boston subs make it easy because with "Sureset" you don't even have to know how to parallel or series the coils together. Just change the fuses to the 8 ohm configuration (1 fuse centered IIRC, but it's clearly labeled) on each G2 and you'll be good to go. Then just parallel the speaker wires from each sub, or run all the wires to the amp and it will parallel them internally for you. A pair of G2's like this won't load down the amp but power will be a perfect match, then when you add the second pair you'll drop it down to 2 ohms to get every last bit of power out of the RSD1200.1. Nice setup. You should really enjoy them!

Post by **Bfowler** » Tue Jul 13, 2010 10:12 am

your octane was the same. they are wired internally in parallel

maybe a typo in the manual?

at any rate, you dont have to bridge it, they just included the extra set of inputs for easy wiring (and becasue they already paid for that type of terminal in the 2 channel, so it was probably cheaper to keep using it) not that that is a bad thing

dedlyjedly · Post by **dedlyjedly** » Tue Jul 13, 2010 10:14 am

The RSD1200.1 and a lot of mono amps have four speaker output terminals just for the sake of convenience. If you take a closer look at the amp, you'll notice they're NOT labeled left or right, just two + and two - terminals. They're paralleled internally. Bridging by definition is joining the output of two channels together and since you only have one channel you can't really bridge it!

Post by **stipud** » Tue Jul 13, 2010 10:20 am

Your 8.0:1 is the same... the amp is not being bridged, it is also a monoblock. If you have speakers hooked up to both terminals they will be in parallel, if you only have a single pair hooked up, it doesn't matter what terminals you use, they are the same.

350sbc · Post by **350sbc** » Tue Jul 13, 2010 10:27 am

awesome thanks for clearing that up!, as for the bostons they're already setup for a 2 ohm load (fuse in each holder) forgive me since i don't know the proper name for the setup on the bostons, i am over powering them i know but just have to leave the settings all turned down on the rsd and should be fine. my current setup anyways on topic is boston G2 dvc 10's in a sealed box, boston S60 components in the front, waiting for extra cash to pick up boston SR 60's for the front and swap the s60's to the rear, custom fiber glass enclosures for the front doors and wil have to make rear door boxes as well, and for the mean time can't remember the model but some high end kenwood coax in the rears for now. all 4 corners powered by a RSD 500.4 amd obviously the subs are powered by rsd 1200.1 . Previous ppi DCX12 dvc sub in sealed box powered by octance r 8.0:1 and a 50x4 pioneer to the current speaker setup. btw i hate projects

future 2 more boston g2 10's for occupy the remaining 600 wrms potenetial in the sd. sounds dumb but love pg amps with the boston speakers

350sbc · Post by **350sbc** » Tue Jul 13, 2010 10:30 am

now to finish my project all that is remaining is building my motor, replacing some body panels and lowering... damn only 10% done but it's the loudest part of the project

oldschoolfan · Post by **oldschoolfan** » Tue Jul 13, 2010 10:34 am

By the way mister small block chevy, welcome the the forum.

dedlyjedly · Post by **dedlyjedly** » Tue Jul 13, 2010 10:40 am

I just downloaded the Boston manual to be sure and two fuses on one sub would parallel the coils on each sub down to 2 ohms. When the two subs are then paralleled together you present the amp with a one ohm load, which is not recommended. It would be best to take one of the fuses out of each sub and move the remaining fuse to the center position.

Stryker · Post by **Stryker** » Tue Jul 13, 2010 12:17 pm

on mine there is only 1+ and 1- input. weird that yours would have 2 of each....

Post by **Bfowler** » Tue Jul 13, 2010 12:19 pm

seriously? pics!

Stryker · Post by **Stryker** » Tue Jul 13, 2010 4:33 pm

Kinda tuff as I'm not at home..... go check out my install thread there is pic's on the first page of both 1200's

dedlyjedly · Post by **dedlyjedly** » Tue Jul 13, 2010 6:07 pm

That's right...the RSD1200.1 had a single set of beefed up terminals. What would be interesting is to see the manual the OP i referring to.

350sbc · Post by **350sbc** » Fri Jul 16, 2010 6:34 am

thanks for the forum Warming, bfowler you would like to see photos of who's? and btw how do you post pictures on here?

Post by **Bfowler** » Fri Jul 16, 2010 8:14 am

i would!.

you can attach pictures, but you might need a couple more posts. email them to me and i will post them?
bfowler at structured dot com