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Last night I finished my install of my 7" Infinity Kappas in the rear of my coupe. I have them wired as follows: on the left I have the blue and white wire spliced with my new positive wire, and the blue and black wire spliced with my new negative wire. On the right I have the pink wire spliced with my new positive wire and the blue and yellow wire spliced with my new negative wire. I'm pretty sure I've done this part right.

The stock wires are spliced into the outboard crossovers, which I know are hooked up correctly because Infinity engineered them so each connector would only fit in the correct place on the speakers.

I am running these speakers unamped with a Pioneer DEH7600MP. My stock speakers put out wayyyy better bass than my Kappas. I've messed around with the EQ some on my HU and it helps a little bit but the bass in nowhere near what those paper factory speakers could do. What's going on?

I had 6.5" Polks running off a JVC unit my old Accord and they put out way better bass than what I have now, so I know a 7" is capable of decent bass. Also the bass output isn't a "well IT IS a 2-way, not a sub" kind of bad, it's a "damn that sounds really shitty" bad.

Does anyone have any suggestions? Have I done something wrong? Thanks a ton.

 
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Have you disconnected just one of the speakers to see if the bass improves? If it does your speakers are out of phase, just flip one of the speakers connections.

 
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I'll give that a try after work. Thanks.

 
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Another thing you may want to take into consideration is that the Kappa's are not designed to reproduce bass. They are probably crossed over to give you some mid-bass and high's not lows. Most factory systems are designed to play the whole 20hz-20khz giving you the whole range and giving you the more bass effect. Most after market speakers are designed to produce mids and highs and are counting on a subwoofer to produce the bass.

Try what up4surf said and if that dosent work you may have to buy a different type of speaker or add a subwoofer.

 
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infinity kappas are infamous for having horrible bass reproduction... you picked the wrong speakers if youre looking for any sort of low end

 
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you can try adding a foam baffle to increase your midbass response, but I wouldnt expect any magic below a cutoff of 100 Hz or so at high volumes....

 
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you seem to forget that the stock system was designed exactly what your useing it for now...your average listening...all around sound is i what i like to call it...

I never expect to much from the higher end speakers, they for sure wont give you what your looking for...In my rears im running Eclips, and i just mostly use them for the Vocals, i have the bass turned almost off on the inside speakers

 
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I did have the wires crossed, so that helped some, but the bass still isn't what I wanted for what I spent. You guys are probably right about trying a different set of speakers all together. I'll probably just send them back and get some 6x9s and amp them. ****.

 
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id expect 6x9's to be worse

I owuld look for a 6" subwofoer or dedicated midbass driver

CSX 6.5" drivers, or adire kodas for midbass drivers, especially with foam baffles, or even better, a small sealed box.

DD w6.5's in .5 cubes ported (you WOULD have to move hte torsion bars)

or even 6.5" subwoofers, like the JL w0.

these would be the solutions id look for for increased low frequency output without the aid of a subwofoer

 
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What kind of bass are you looking for? If it is crank it up bass (rock or rap) look into an amp and sub(s). I have found that most people that buy a new set of speakers are expecting the sea to part.

 
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i've heard a set of alpine 6x9" type r's in the 7th gen coupe and they produce tons of bass

i'd say comparable to having a 6" bazooka bass tube in the trunk

i cheaped out and bought kappa 692.5i's for my car but have yet to install them. should i sell them then buy the type r's instead?


also, somone on this board said those kappas produce more bass if you bypass the crossover for the midbass woofer. you wont damage the woofer but you'll have all those higher frequencies reaching the woofer. might not sound as clean but the guy said there was more bass...

 
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all I was expecting was something that would sound better than my factories. while the highs sound better, i've already installed a component system in the front, so I wasn't really interested in having great highs coming from the back. I'm prob gonna take these 7"s out.

 
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wow obviously u havent been in my car.....lol any BUT horrible bass reproduction.....i have kappa all around in my coupe...and **** everyone that has ever been in my car thinks i have subs in my trunk.

i will buy infinify kappa for my future cars too no doubt about that.

 
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Ya, infinty sucks with bass. My buddy put Kappa's all around in his 5.0 and persnoally I thought his setup of 4" tweets, 6.5's (doors) and something like 6x9's in the back. sound high, but no bass response. And he listens to Hip-hop.

 
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I have infinity reference 6.5 in the back and can get those to thump with the right settings. You don't want to hear them from the front anyways. It just messes up the sound stage.

Sorry for OT, but does anyone know why my bass is 2x louder and boomier in the back seats? It sounds perfect in the front, but in the back everything sounds worse. I have one 10" sub and lots of dynamat.

 
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I am hooking up an Alpine mutlichannel (75w x 4) amp soon. I will report back with the results.

 
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im having the same problem!!!

 
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my guess would be a compination of proximity to the woofers combined with strange cabin accoustics.

back when i had back seats, i could put people to sleep with the bass.....

 
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what do you mean out of phase? can you explain a little more please?
and if i unplug one of the speakers and one of them get louder does that mean its a power issue?

 
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Spending lots of time in the back seat? Good for you! (sorry had to) More than likely it is just the way that bass waves travel. Big long waves will act differently depending on where you are, and if there are any cancelling waves as well. You can try flipping the phase to see if it fixes you situation but be sure that it didn't change the way it sounds up front where it counts!(or does it?)

 
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phase is an issue that changes wave interaction between left and right speakers. phase inversion is defined by unplugging a speaker and replugging it with the + terminal going to the - signal and vice versa.

so if you have rear speakers and you flip the plase on both, then we say the phase is reversed compared to the fronts. If we flip the phase of the right speaker, we say the phase is reverse from left to right, or that the right speaker is "out of phase"

it affects where instruments image in the car, and can affect frequency response as well, but FR is much more nebulous than image location.

ever sit in a car where you can only hear the door speaker on your side, and cant hear the drivers side at all? poor imaging indeed!

Take my car, for instance. in the drivers seat, I had endless problems getting a center image, no matter what I seemed to do, I would hear the drivers side well, but not the passengers side! didnt feel liek the stage was "even". thats bad!
But when I flipped the passenger midrange out of phase, the whole stage became MUCH closer to center, adn I was able to eventually get an image from it!

my story here is actually very common among those looking to set up a quality sound stage. but if I had a dollar for every time phase ****ed up imaging or staging or frequency response rather than helping, my stereo would be financed forever!

 
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Tweeters also helped me with imaging. I hate driving cars now where you hear more passenger speaker. On my old car, when my rear speakers were out of phase, I didn't get any bass. Switched them and got alot of bass. Go figure.

 
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i recieved my new kappa 692.5i's but haven't had them installed in my car yet because i still have to do the trunk springs mod.


right now the kappas are sitting in in my room. i installed them into 6x9 speaker boxes and used an MTX Blue Thunder Pro 4channel amp w/ panasonic deck to power them. i am able to get a good amount of clean bass from the kappas if i crank the bass on the deck and the amp. without turning up my amp's bass boost, there's very little bass. i think the reason is because these are free air speakers but they're installed in a small sealed enclosure. hopefully, the kappas will produce more bass when installed in my car.


i also tried the stock pioneers in the 6x9 boxes for comparisson and wasn't able to get any bass out of the stock speakers. since i already know the stock pioneers can produce some bass in the car, and the kappas can produce more bass than the pioneers when installed in the boxes, i think the kappas should sound alright when installed in the car.

 
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Update:

My 6.5" Kappas are now getting juiced from a 50W x 4 Alpine amp (I think I had misquoted the wattage in an earlier post). Everything in my car sounds 10 times better. For anyone reading this thinking about installing an aftermarket system, an amp is NOT an option. It is an essential part of your system, and I underestimated this. My components in the front sound a lot brighter and bass is more profound, and the 6.5"s in the back are much more prominent. I couldn't really hear them before and I didn't really want to when I could because they sounded terrible. However, the bass coming from the rear speakers is NOT as deep as my factories. Hip hop sounds good, but there is some rattle because I couldn't find an adapter plate that fit and I was too lazy to make my own, so the speakers are only secured by two screws and they hop around too much. However rock music owns. It sounds excellent. So I'm pretty happy with my system, but I'm still considering replacing the 6.5"s with some 6x9s w/speaker baffles.

My current system, if anyone wants to know:
Pioneer 7600MP
Infinity Kappa series 60.5cs Componets
Infinity Kappa series 652.5i 2-Way 6.5"
Alpine MRPF240 340 Watt Amp

 
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When I got my vic, I never put my 6x9s in the back and ended up with the stock ones ther and my 6"s up front installed. 2 years later, I still havent installed the rear speakers and now I cannot find one of them and hte other one sounds like the coil is rubbing the speaker when it plays.

Damn Honda for making it so hard to get to the rear speakers thus causing me to put it off for 2 years adn then losing a $75 speaker.

 
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so do you have 6.5" kappas in the back or the 6x9" kappas in the back? it sounds as though you are saying you used 6.5" for the rear but you have the 6x9's on your list

also, are saying the kappa 692.5i wont hit as deep as stock pioneers even when amped? that sounds really dissapointing because i've heard alpine type r 6x9's in a 7th gen civic and there was waaaaaay more bass than stock pioneers. it was like having a 6.5" a bazooka bass tube in the trunk.

 
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I have 6.5" (some places list them as 6.75") in the back. 652.5i is the 6.5" Kappa model. I've listened to them quite a bit today. Rock music sounds incredible, but the bass is just ok for hip hop music. I don't know if I'm going to keep them though.

Do the Alpine Type Rs fit without doing the trunk mod?
At this point, I would be happy with something that put out as much bass as the factories except they could handle all the power I have now, or else I would consider putting the factories back in.