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ok, i finally got the pioneer deh-850mp hu, the cdt cl 61a, and infinity kappa 3.5's for the dash. FIRST ?....i have an OLD kenwood kac 721,,,i dont remember the ratings tho'...will this amp work until i get a bigger-better amp?? SECOND..when i do get a new amp.....what kind would i want for these speakers...i want Xtra LOUD!!-------thanx Replies (21) Tray on 08/1/2003 12:40:49 OK, well, I couldn't find anything on the 721, but found specs for the 720, and it's rated at 45 x 2 RMS at 14.4 volts running 4 ohm stereo. This amp will work for one pair of the speakers you have. I would suggest amping the CDTs first, and then adding something to the Infinitys at some point in the future (how soon is up to you). When you do get a new amp, you need to look at what the speakers will handle. The CDT Classic 61 is stated to handle 90 watts RMS. The Kappas are stated to handle 35 watts RMS. Personally I would look for a quality amp that pushed anywhere from 70 to 100 watts x 2 at 4 ohms, and pair that with the CDTs, and transition the Kenwood to power the Infinitys. You could always look for a 4 channel amp to power everything, but then you'd either overpower your dash speakers, or underpower your door speakers, or both. Tray wolfsmane on 08/1/2003 16:12:51 i should have stated this first, sorry. this is going in a 82 chevy p/up fullsize single cab. 3.5's in the dash and 6.5's in the door. if i use a good high power 4 channel amp,, i couldn't tune it down going to the 3.5's and still use full power at 6.5's?? yes im a noobie. or should i get a good 2 channel amp for the 6.5's and run the 3.5's off the HU? thanx Swez on 08/1/2003 22:21:40 Personally, would amp your best gear here as the CDT's will be your primary front stage if door mounted. Can use the HU amps (if any) to power the 3.5" Infinity speakers in dash, but cross these over at ~200 Hz. Anything lower that that, they will not handle the bass well at all. The good news, Infinity speakers are pretty efficient and take little power to get them chirping well. But all full range speakers in the front stage can make for poor SQ over all.... too many mids/highs in a limited space. Focus on getting more power to your CDT's for now. If that Kenwood is all you have, use it for the CDT's now and add a larger amp if you desire more SPL from these great SQ speakers. Then, there is the issue of rear stage speakers or subwoofer for low bass. In a smaller P/U the CDT's and a decent sub setup should be a very good setup. The Infinity speakers can be used as ambient front fill, but use low power here to "blend" with the CDT's and not fight them. Comments? Swez wolfsmane on 08/2/2003 06:23:51 thanx for the reply swez. the HU is pioneer deh 850mp. i plan on using this amp temporary. want a MUCH larger one a lil later. how big should i go,, and want brand/model? also, i plan on putting 2- 10's behind the seat. just wait'n on the xtra $$$flow. whatcha think? Swez on 08/2/2003 09:40:24 Well, you have a nice Pioneer HU and it does have power amps and filters and many other toys too. Good choice Wolf! For now, I suggest that you run the front channel amps of the HU to the 3.5" dash speakers and set the HP filter on front to 125 Hz cutoff. The HU rear channels can power the CDT's for now and set the HP filter for these to 50 or 80 Hz. (whichever sounds best for now) The Kenwood amp you have now, can be used as sub amp for now. No it won't knock you outta your seat with ear bleeding bass... but it's got enough power to add some nice low end bump to what you have now. Since cash flow is an issue for many of us, taking this upgrading in stages, makes a lot of sense. The amount of power (ampere draw) your P/U can handle is really determined by the ALT & BAT power available. Do you know what size engine, ALT and Battery are in this truck now? Say more... Once we define these parameters, then we can figure out the next phases of the install and upgrades to get you there. Finally, how much are you budgeting for the subs? Ballpark is fine and do you have woodworking skills and tools enough to build a custom fit enclosure for your ride? Figure $50-75 in materials should do it for a nice box. If you buy a prefab box, figure $100-150 here, depending on quality and materials used. Comments? Swez wolfsmane on 08/2/2003 12:11:11 i ahve a 82 chevy silverado single cab truck. 350 ci engine. it has oem 65 amp alt. but as we speak its being upgraded to a 165 amp monster! battery is old and small,,but is also being upgraded to bigger and better. am also going to put in new battery cables. any suggestions on what kind of cable and terminals to use? wolfsmane on 08/2/2003 12:14:26 im at work and i'll try to get back to you with more info,,,thanks!! Swez on 08/2/2003 13:18:43 If possible, avoid side mount battery cable battery only. Some of the newer batteries offer both side and top mounting posts. That's the best option if your stock bat is typical GM side mount only. As for wiring and hardware, www.knukonceptz.com has a very nice selection of wires, cables and other hardware products for car audio. Very high quality, but very reasonable prices as compared to Stinger, RF an Schoshe. Seems like you'll have plenty of power to drive a pair of potent amps... one for the CDT's and one for the subs. Just depends on how much bass you want and can afford. As for amps, US Acoustics offers several nice Mosfet and Class D amps at very good prices. I have a USX-4065 now awaiting install and the buddy who gave it to me liked it alot... but really made a big upgrade... so... yippy Is 65 watts RMS x 4 and there is a big brother to this amp... USX-4085... same thing only bigger and more power. Here's a link to review USX amps: http://www.thezeb.com/caraudio/us_acoustics.html The USX-4065 can be bridged to a 2 channel version to power your Comps. Will have 130 RMS per channel x 2 here and at this price, that's a very good value. A larger amp will give you full potential to your Comps, but have no disortion when it runs out of gas at high SPL. Just have to be careful in your setup of the gains and HU so you don't overload your Comps and blow them up. As for a sub amp, go Class D for this one as you can use larger amp, that draws less power too. The USX-800 D is a good option and well priced. If you want more power, The JBL BP-1200.1 is 1200 RMS at 1 or 2 ohms and can be had for under $300.00 off Ebay and a few other sites. About subs... lots of great choices out there, depending on the amping power you choose. Cannot go wrong with Infinity Kappa Perfect DVC subs, RF Power series, Kicker Comp VR's, or W7 series or JL 10W6v2 subs. All have 10" versions of DVC subs and will take a lot of power as well. All depends on your tastes and budget. Audiobahn is also a possible choice to consider in 10's You just need to figure out what your budget is and do you want high SPL or High Sound Quality (or a blend of both) which many prefer. Comments? Swez deepseajt on 08/2/2003 14:23:56 Good info on the us Acoustics. Amp heading to pensacola today to see if I can find a good deal without buying online. It is hard though! All the stores here in ft walton want to charge you an arm and a leg for a decent amp. Was looking at a memphis bell 600d 5 channel... Store was asking $649. Unbelievable. At any rate want to get something in today so I am headed to get some toys... wolfsmane on 08/2/2003 16:04:17 thanks for the replies, guys. more info:::its a single cab truck,,, i'm tall and have to have the seats all the way back. just going by my poor memory.....6" width at bottom,,,3" width at top,,,,,about 15"+ tall and the width of the bench seat. thats the amount of room i'll have for the box. it doesn't leave alot of room for a monster 10". so i'll have to settle for something a lil less.(but still a 10) wolfsmane on 08/2/2003 16:10:44 i have heard alot of good things about the jbl 1200.1. i have intentions of getting that......depending on whether i can get a sub that will fit and can handle that much power. as far as how much i am willing to spend.....i am not going to scrimp and get crap. if i have to wait a lil longer to get good quality,,then thats what i'll do. nother ?==> i can't use a 4 channel amp on both the 3.5's and the 6.5's......and somehow tune down the 2 channels that are going to the 3.5's??? a crossover maybe??? yes noobie questions...but i got to learn!! deepseajt on 08/3/2003 01:14:29 I had pretty much the same question today when looking around. I just learned that it is 6x9's in the front of my truck and 5.25"s in the rear doors. I wanted to parallel each side (Left/Right) to get down to 2ohm but the 5.25s (the RF's I was looking at at best buy) wouldn't take what I wanted to give the front, RF 6x9 three way. They sounded pretty sweet. I really was looking into components for the front but my speakers are high enough in the doors I think the difference is small? Anyway... anyone got some info on this? Wolf I do know this.. there may be a way to do what you want to do with a 4 chan... I believe that the power handling capability's of a speaker will increase when you increase the frequencies its sent. In other words.. some 4 channel amps will have adjustible crossovers to where you could send the 3.5's highs on one channel and the 6.5's your mids. Dunno for sure... I am hungy to learn myself. jt Swez on 08/3/2003 09:46:41 Wolf: Yes, a 4 channel will work for this application as both paired channels have filters and gain adjustments to compensate for differences in power handling of dash VS Comps. The HU you have , also has filtering and a few other toys that may be employed to fill in the gaps in power handling. Also, the JBL 1200.1 is a beast of an amp and not a toy as the Kenwood you have now. The only sub I know of in a single 10" or 12" that can take this kind of power and survive, is the Brahma from Adire Audio. This is a premium sub ($400.00) for a 10"... but can operate well in a small air space with adequate power handling to take the 1200.1. Is a 1/2/4 ohm DVC. Link: http://www.adireaudio.com/mobile_audio/drivers/brahma_series.htm Now, we need to figure out how to sqeeze this sub into the sapce you have available. The sub is 10.5" in diameter and 6.5" deep. It can operate in a very small enclosure of under 1.0 cf sealed. So, some careful planning of an enclosure is a must to fit in this truck and give proper physical and sonic space for the sub. In this case, up firing or side firing designs make the most sense. A bass tube may be your best option... but making the tube strong enough to take this much sound pressure will be the key. JT: You can run a the F&R speakers as mentioned, but the amount of power you feed the weakest driver will be the limiting factor. Also, the 6x9's can go much lower in frequency as compared to the 5/4" drivers in rear. So you would have to do some electrical tricks to make this one work properly. 1. Install L-pads on rear speakers to cut back on the power they receive 2. Also install passive filters (Caps) to block low bass to the rear 5/4" speakers 3. Use a 4 channel amp The L-pads are variable resistors that will absorb a variable amount of power, going into your 5/4" speakers. This device will change the resistive load to your amp to some degree, but is the only way to avoid blowing out a weaker speakers. The bass blocking filter caps will protect the 5/4" speakers from getting too much low bass and tearing them apart. Also, if you use a 2 channel amp as mentioned , there will be no "fade" balance control available from the HU. You'll have to do this "blending" manually with the L-pads Using a 4 channel amp solves all the issues noted and gives you all the features lost by by what was mentioned earlier. Make sense? If more questions JT, start a new topic so we can keep your issues separate from Wolf's original post. Tks. Swez deepseajt on 08/3/2003 10:57:14 Swez, Thanks. I understand from your post that the best bet is to install a 4 chan and save all the trouble of individual component tweeking. I started a topic on my Ram install but I guess I didn't ask questions very clearly. I will ask for help in another topic -I am still confused on how exactly this new system will be designed. Thanks again - jt - wolfsmane on 08/3/2003 11:40:35 swez, sorry bout the mis-communication. my intentions are to squeeze (2) 10" subs behind the seat, firing into the seat back at an angle. i've seen a prefab box at a local shop that should do the trick.. the problem i'll run into is finding 2 subs that will fit into the shallow mounting depth. also, using a 4 channel amp( for 3.5's & 6.5's),,will i need a x-over? thanks wolfsmane on 08/3/2003 20:21:03 ^*bump*^ Swez on 08/3/2003 21:42:48 Wolf, There are number of subs that might meet your space criteria. The bottom line is what box van you find to meet the space needs and what subs will meet your performance needs. Tricky balancing act.... but it can be done with careful planning and sub choices. As for an 4 channel amp ... yes, this will sove most issues mentioned previoussly. Most 4 channel amps have both HP/LP filters and gain controls for your application. Just have to figure out what power you need and filtering/power management to meet the speakers you have now. Swez wolfsmane on 08/4/2003 10:54:12 swez, for now, i am going to hold off on the subs/amp. i am going to concentrate on just the HU, the 3.5's and the 6.5's,,,and the amp for them. what i want for/from the them is the loudest, cleanest, clearest sound possible. what would you suggest as far as an amp for this situation? would i need a crossover? if so, what kind? again, i appreciate your time and patience. wolfsmane on 08/4/2003 17:26:58 swez, my alt. is being upgraded to 160 amps. which gauge pos & neg battery cable should i get? what about the battery post connector,,,any certain one as far as how many connections can be made to it? any "one" peticular brand battery better than another? or just get a good name brand with as many cold cranking amps as possible? also, my battery ground cable grounds directly to the alt bracket......would grounding it at the frame be a better choice? thanks for the help wolfsmane on 08/4/2003 20:44:19 ^*bump*^ wolfsmane on 08/11/2003 14:41:28 hey, swez,,,i'm in the middle of installing-----and i need your advice. i've decided to use a GOOD 4-channel amp. which would you recomend? i want as high a power amp as possible for this situation. thanks! 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