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Finding room for RS1B's!

cdfac

cdfac

AK Subscriber
Subscriber
I took the plunge on these puppies off of A-gon and I'm super excited. No complaints whatsoever with my QLS1's, but when the Infinity bug hits, well...:D Hey, was it one of you guys that tried to steal them this morning by offering more than the asking price in cash? I consider myself lucky since I waited several hours after first seeing the ad before making an offer. I made it when I found out I could get them shipped to me by a reputable guy off uShip for only $450. No crating, just lots of blanket-wrapped white-gloving loving. The only risk is if he gets his trailer hit hard in an accident :scratch2:, but even crating may not be enough in that case.

They are in excellent shape judging from the closeups the seller sent me. Turns out they are either the final revision or late in the revision before that - they have three driver pots that look like those from the Kappa's, which looks more like the last revision, but they also have the colored Monster wire instead of black, which would tentatively put them from the previous revision. Serial number from one panel is 7009729, if that means anything to people with more knowledge. As with most of their stuff, I'm assuming that the later versions are generally better or at least less problematic.

My plan is to run a PC5002M on the EMIMs/EMITs and find something around 200-250wpc for the bass panels that can manage a PC5002M-like square wave into 20Hz. I've been told by the previous owner the woofers didn't require as much power by a fair amount, at least in his room. We'll see, I guess!
 
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Yep, they're going in my big ugly basement mancave (which is always being made more audio-friendly). i'm sure they'll be trickier to place than the QLS1's, but I expect I can round up a little area AK help ;)
 
I hope you got the crossover with it as well. You'll like them.. guaranteed.

PS. I posted pictures of mine on the site.

MAK
 
cdfac said:
Yep, they're going in my big ugly basement mancave (which is always being made more audio-friendly). i'm sure they'll be trickier to place than the QLS1's, but I expect I can round up a little area AK help ;)
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Indeed help is just a few miles north and readily available!

We'll have to check out the QLS1's before they depart, maybe next week, in the evening if work doesn't ship me out again.

Can't wait to hear the RS-1b's also; congrats buddy :thmbsp:
 
Nice, you're going to love them. My one piece of advice: read the manual on the crossover setup carefully. Read it again. Then, read it again before you try to wire the crossover up. Need to pay REAL close attention to the wiring on these, but otherwise they're marvelous. Congratulations!

David
 
Good luck they are one of Infinity's best! BTW, I used uShip to transport my RS4.5s across the country and was very happy with the results! No crates either, just lots of heavy moving blankets and wrapping, worked fine!

That pair looks to be in very nice shape, I think you will be impressed! You will need lots of patience in setting these up and adjusting them. But they are worth the effort!
 
I posted in your thread in BT, but I see my answer was waiting here. Congrats on scoring these. I saw them shortly after they went up on A-gon, but don't have the free audio funds right now, so I was hoping an AKer would get them.

Besides, my wife would probably NEVER let a set of these beasts in the house. I REALLY need that mancave.
 
Congratulations on the 1B's! Should be a real treat. I will second the advice on making sure the crossover connection are correct. If you get the bass amp connections wrong, you will know it quickly. Also, I have found that these speakers need much attention to careful set up and positioning. Very little movement can make big changes. When you hit the right placement, they should literally disappear and give goosebups.

Enjoy!:thmbsp:
 
I'm running adcom 565 monos on the lows of my IRS Gammas, and they are loafing. My buddy had success with a Bryston 3BST on the lows of his Betas, but changed to a 4BST and there was some tightening of the bass. The 4BST is loafing along as well.

Placement is (obviously) critical, and you'll spend months finding 'just the right spot'. I like having the one-box solution as it keeps the amount of acerage to a minimum, but I would love to have the option to tune the room by moving the bass speakers around, while keeping the panels exactly where I want them.

Man, you're gonna have some fun! Congrats!! :thmbsp:
 
Going LARGE! Congratulations.....I guess the Infinity underground grapevine has the QLS-1's "departing"? If so I'll have to inform my audio prone relatives in Eagle Grove, Humboldt and Algona about the QLS's availabilty:)
 
tubed said:
Going LARGE! Congratulations.....I guess the Infinity underground grapevine has the QLS-1's "departing"? If so I'll have to inform my audio prone relatives in Eagle Grove, Humboldt and Algona about the QLS's availabilty:)
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i would appreciate that, tubed! i've been to all those towns myself on more than one occasion, either for H.S. sports or quiz bowl contests. of course, we probably shouldn't dwell on such...matters...here :nono: :D
 
Ooooh, you lucky dog! :thmbsp: Possibly the next best things to the ultimate IRS-Vs, and certainly fine, fine speakers. No point in repeating what everyone has said about crossovers and placement, so I'll just say ENJOY 'EM twice as much, for all of those still only dreaming about 'em... :music:
 
Congratulations. Glad they went to a fellow AK'er. Am very jealous but I know that the wife would have kicked me out. (Notice, I said me, not the speakers)

You know, with all the different models of Infinities "moving" into the midwest region, there could be quite the listening tour made up!
 
kurtgo said:
You know, with all the different models of Infinities "moving" into the midwest region, there could be quite the listening tour made up!
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that's a great idea, sort of like a traveling mini-fest. it would be cool to have people bring their favorite amp with them too, if they'd like. we'd get more familiar with the amps as well as finding out which amps are best suited for different setups. i think sometimes we rely too heavily on anecdotal evidence because that's all we have to go on most often.

question about the RS1b "servo"/equalizer. what does it actually do? obviously there is no accelerometer like the later servo-controllers, but it must monitor something that the woofers are doing (impedance or similar) since it's wired directly in parallel with the woofers. if it was just an equalizer, it would make no sense to place the function after the amplifier.
 
..."The woofer columns do not connect directly to their LF drivign amplifier, but instead to a 5-way binding post on the crossover. The Module, in turn, connects to the LF driving amp. This arrangement allows the device to compare the LF amplifier outout signals with signals appearing across the speaker terminals, and to cancel out any detected differences (which would represent back-EMF form spurious woofer cone motion)."

BE CAREFUL on hookup, you will have the same potential to have a run-away oscillation as the IRS woofer-mounted accelerometer system! I've been there, you do not want to go there!

I would assume the servo using the travel of the woofer cone is a bit more accurate than watching the signals only. Either way, both systems are watching things that have already happened, which is true in all servo circuits. Still, it seems to work well. The smaller woofers in the RS1B are probably more linear in the first place, than the 12" woofers of the IRS.

Watch the polarity. Make sure you know ahead of time whether your preamp and amp are inverting or not. You will absolutely know in an instant, when it's hooked up incorrectly. Think of a 1000 watt fart that keeps getting louder (in milliseconds) until the world sounds like it is ending...:thumbsdn:
 
If I am not mistaken, there is an accelerometer on the lower driver in the woofer tower per the prior owner of my RS1B's. I've never taken the driver out of the tower to check. CDfac, you are not to far from my place. About 2 hr drive to have a listen on my system if you like. We are in the DeKalb Ill. area.

Have fun

MAK

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