Infinity & Pro Power.

Discussion in 'Infinity Loudspeakers' started by 7.62, Mar 19, 2017.

  1. 7.62

    7.62 Gearhead Subscriber

    Las Vegas
    It's kinda a Sunday morning these are my thoughts on Pro Amplifier's as I'm pretty sure I've made it to my Happy place as one chapter is closing and another is beginning and that would be the joy of Music. I think it's worthy and may help the newbies that discover the Infinity Brand.

    I know when I did my first search on the RSII's Audiokarma was the first website that came up.

    So Wednesday I bought an Crown XLS Drivecore Series II 1502 from a major chain because I wanted peace of mind the amp would be new, unused in any way. Specifically to handle the woofers on my new to me QLS-1 speakers. I moved everything around a bit and lost the MC-2105 and put the Emotiva XPA-2 Gen 2 on the top. The Crown is a 8-4-2 Ohm stable amp.

    So basically I have about a total of 1,275 watts of power to throw at the big boys.

    I'll just say it sounds like nothing I've ever heard and suits me perfectly, I'm loving everything. For the price the Crown spanks the Watkins woofers, I really pushed it hard and could barely get the second set of lights to go, the fan doesn't come on until it's needed and it's a great feature of this amp. I don't know how it works but at 7 pounds it's light as a feather. Another great feature if your getting older and the back is as well.

    It's not my first pro amp, I destroyed just about all the regular type amps I had trying to get my Kappa 8's to sing being somewhat budget minded, Eagle, Adcom, Carver, Emotiva, Onkyo and a few I'm forgetting. It wasn't until I brought in a QSC-GX5 that could finally drive the 8's with ease. As a matter of fact it was the first time I had to get off the gas peddle so to speak. I was using an MC C-26 with this setup and it sounded very good.

    So in a nutshell, don't be afraid to try a Pro amp, I'd take the Crown over QSC simply because of the fan feature. I think your choice of Pre- Amplifier has a lot to do with the shape / sound of your music. If your Infinity's are biampable let the pro amp do the heavy hitting.

    If you have deep pockets the sky's the limit, but for the budget minded like myself the pro amp is a great option ! IMG_1356.JPG


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  2. slimpikkins

    slimpikkins Super Member

    South East PA
    So I take it you are enjoying those QLS1. Get all those drivers working? How do they compare to your other Infinitys? To me the image and sound stage can not be match by what I have and I have 5 pair of the various larger variety. The RSIIb are close and may be a little more accurate but never as forgiving to the rock recordings which I love but are poorly produced...

    Nice choice on the Crown. They have been around for a long time for a good reason.
  3. jazzmans

    jazzmans Super Member

    devils playground, NV
    Nice, Dave! I've come to much the same conclusion with regards to amplification. If i ever get time off, I've got to come listen to them (the QLS, I mean)
    that series of crown amps makes me drool.
    2 ohm load 775w, both channels driven
    4 ohm load 525 w, both channels driven
    Sensitivity 1.4Vrms
    Frequency Response +0dB, -1dB
    Signal to Noise >103dB (at .775Vrms, 6dB lower)
    Intermodulation Distortion < 0.3%
    Damping Factor > 200
    THD < 0.5%
    Crosstalk At 1kHz: > 85dB, At 20kHz: > 55dB
    Dimensions 19" (48.3 cm) x 3.5" (8.9 cm) x 7.7" (19.6 cm)
    Weight 8.6 lbs (3.9 kgs)

    Last edited: Mar 19, 2017
  4. 7.62

    7.62 Gearhead Subscriber

    Las Vegas

    Yes and throughly so, The QLS-1 is an amazing speaker. I guess the best way for me to explain how they sound, I used to drum around the house doing chores / projects while jamming. Now I SIT and really get into the music. Jim you have the 2B's with the big emits, boy I sure wish we were closer I'd love to hear those !

    I don't think life will be complete until I hear a pair of Kappa 9's though. So the quest isn't quite over, if a pair becomes available I'll probably go for it. OK who here in Vegas has a pair ? I know there's some lucky owner because they really caught my attention at AudioExpert the first time I went in but they were already sold. Hell I really didn't know better then anyway.

    Anytime buddy, they're not going anywhere. :beerchug: You know what's crazy to me while the Crown is barely working, the midbass, 12 mids and 16 emits @ 1/2 volume or so the Emotiva meters are going to the end of their deals. That's a lot of power.

    Uh-oh, just got a trade offer for the 2105.......a pair of RSII'S.
    Last edited: Mar 22, 2017

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