kve777 6,888 Posted February 20, 2015 Posted February 20, 2015 Looking for power info for feeding Kappa 9's in bi-amp. Carver amps available(all stock, no MKII)- Four M-1.0t(two inverting, two non-inverting), Three M-500t and an M-1.5t. My immediate thought is use the M-1.5t for the low ends of both, or two bridged M-1.0t and a bridged M-500t for each high/mid. Four bridged M-1.0t comes to mind next. What do you guys think would work best? What I really want to hear is four SoundStream DA-2 amps, bridged. That basically makes them 1200 watt monoblocks according to the guy who designed and built them. Volume control restraint must be practiced!
peck555 366 Posted February 20, 2015 Posted February 20, 2015 Damn Kev, you really have a lot of DA-2's, not to mention the Carver amps I would try the DA-2's first (mucho power ) then if you don't love the sound, go for all M1.0t's, after that I would try the 1.0t's and M500t combination, but I wouldn't bridge them unless you need to.
kve777 6,888 Posted February 20, 2015 Author Posted February 20, 2015 Damn Kev, you really have a lot of DA-2's, not to mention the Carver amps I would try the DA-2's first (mucho power ) then if you don't love the sound, go for all M1.0t's, after that I would try the 1.0t's and M500t combination, but I wouldn't bridge them unless you need to.I like the meters on the 500's! The DA-2's are boring to look at. Greg, you want another pair of AL-III's? Plus' this time. In black.
Gene C 1,748 Posted February 20, 2015 Posted February 20, 2015 Unless the Soundstream bridged amps are rated at 2 ohms, probably would not try it. Also putting bridged M-1.0t's on those speakers is a bad idea they will sound like crap and you run a good chance of damaging the amps or speakers (speaking from experience). I see 2 options with the amps you have Kevin. Option A. (which is what I would do) 2 M-1.0t's. 1 for the mids and highs, 1 for the bottom end. Of course your going to need some restraint when it comes to the volume. Different kinds of music will dictate that one. Start off with some Pink Floyd to get a better idea. Option B. M-1.0t on the mids and highs, M-1.5 on the bottom end. See how that fares after trying option A. Later if you can get your hands on some Silver 7t's or 9t's your search will be over on Carver amps for the Infinity's, unless you can get your hands on a TFM-75 or a PT-2400. 2
kve777 6,888 Posted February 20, 2015 Author Posted February 20, 2015 That's Right! I forgot about the impedance dip. That's why I love you guys. Keep me from hurting myself. I just put an offer in on an TFM-55x...to go with my C-11 and TL-3300 I just checked, the DA-2's are good for 580 watts per channel at 2 ohms. No 2 ohm rating bridged. Dual mono, so no advantage running four, like Carver's with 'power steering'
Rockster2U 668 Posted February 20, 2015 Posted February 20, 2015 "Damn Kev" is an understatement. You guys never cease to amaze me. I thought I was doing good after I picked up a pair of 7Kappas a couple of weeks ago and have finally figured out how I'm going to use them. I've got a couple of pieces of equipment that I need to get rebuilt before I integrate these into my system and based upon the guidance you've gotten, I'll follow suit in a separate thread when I get closer to making the changes I'm considering. (don't hold your breath, it will more than likely be a couple of months out) In the meantime, I'll continue to drool over your escapades.
Ar9Jim 6,512 Posted February 20, 2015 Posted February 20, 2015 I would vote for what Gene called option 1.I would do the active crossover and run stereo vs the 2 amps mono full range left and right.Imho.
kve777 6,888 Posted February 20, 2015 Author Posted February 20, 2015 One thing I do not have is an active crossover. Yet...
Ar9Jim 6,512 Posted February 20, 2015 Posted February 20, 2015 I know,I was hoping to buy one from you!You cornered the market on everything else!lol.Thanks for your help a couple weeks back when my preamp failed.I had 3 amps and only 1 non working preamp and nothing to listen to.This is what happens when your OCCD gets out of balance.After Dennis is done with the C1 I will never be caught with only 1 preamp again.
Gene C 1,748 Posted February 20, 2015 Posted February 20, 2015 One thing I do not have is an active crossover. Yet... Unless your defeating the internal crossover (which wouldn't be a good idea) I wouldn't even bother with one. But if you were, I would make sure the bottom end set at 100 hz and the top end set at 80 hz. The crossover point on the Kappa 9's is around 90 hz. Better to be safe than to always be second guessin. 1
Gene C 1,748 Posted February 22, 2015 Posted February 22, 2015 Thursday came and went. When are you bringing those damn things in the house so we can take a look see with the grilles off?
kve777 6,888 Posted February 22, 2015 Author Posted February 22, 2015 Thursday came and went. When are you bringing those damn things in the house so we can take a look see with the grilles off? I dragged 'em in and they are in the basement. It's crowded down there. But here goes- The woofer surrounds will be easy. The Polygraphs, not so much. I went to remove one- damn! The solder the spade connections! Once I get them off, I have a plan. It includes a couple of woofer dust caps that have the exact size and shape needed. The surround roll will be the most delicate. I will reinforce and repair them with RTV. I shall document with photos. 1
Gene C 1,748 Posted February 22, 2015 Posted February 22, 2015 Yeah, a de-soldering iron is very handy with those speakers. The first time seeing those terminals soldered I was like WTF?
kve777 6,888 Posted February 22, 2015 Author Posted February 22, 2015 Yeah, a de-soldering iron is very handy with those speakers. The first time seeing those terminals soldered I was like WTF? I might cut them and solder connections a few inches away, just to avoid overheating the VC leads. A real concern considering the amount of solder I see. Are all of the connections like that? I have to pull six drivers.
Gene C 1,748 Posted February 22, 2015 Posted February 22, 2015 Yes, every one of them have spades connected with solder. You will be fine as long as you are not on those terminals for more than 5 seconds. I did a few passes with some wick and pulled the connections off with the iron on it after getting most of the solder off. Once you get them back together you'll want to re-solder those spade connections. 1
Showmodel 86 Posted February 22, 2015 Posted February 22, 2015 Kevin, I will be very interested to hear your results with powering the 9's with your selection of Carver amps. Kappa 9's have always been on my radar and I passed up a pair recently in great shape that only needed the woofers refoamed. Should have pulled the trigger, but was scared away by all of the concerns on powering them. The fact that I recall that you like your music loud and proud like me will be helpful
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