I've always wanted to put Infinity speakers in one of my cars and finally decided to buy one. I've been installing car stereos professionally for a number of years, but it's been around 16 years since I've been in the field and Infinity seems to have radically changed the sonic performance of their component speakers. Infinity speakers from c. 2000-2003 were smooth, with a nice mid-range bass. The highs were detailed but smooth, without a hint of hiss, and the woofers provided ample mids when the sound system didn't include subwoofers. I even heard it once in an Infinity demo vehicle that visited my shop and it easily ranked in the top 3 sound systems I've heard in terms of sound quality. It was the old Infinity Kappas and Kappa Perfect that I knew. The Kappa 6" finish kit I bought sounds NOTHING like what I remember. I first set them up to be powered by my Kenwood main unit which must be 15 or 16 years old but it still works and has crossovers built in. I took the time to run 16 gauge wire through my doors while the crossovers are mounted high in the dash on the driver and passenger sides of my car with a discrete amplifier. since the Kenwood headunit was installed.The factory tweeters were installed in the doors behind grilles built into the door panel, so the Infinity tweeters were installed in the same location using the same metal bridge as the factory tweeters.Prior to installing the woofers in the doors, I've soundproofed the sheet metal in the front half of the doors to dampen possible vibrations, and I've also soundproofed fung used to fully enclose the woofer modules to give them the benefit of playing in real enclosures rather than free air/infinity baffles. I also used the included foam pads to keep the speaker frames as tight as possible. I already had Infinity Primus 6x9 woofers installed in the rear of the car so the components should complete the factory speaker upgrade. The crossovers come with no instructions so it took me a while to figure out how to remove the covers so I could screw on the speakers. It's actually the underside that comes off, not the top cover like you might expect, leaving you with an open crossover to screw the speaker wires to. What I also found is that the copper-colored Infinity badge in the center of the crossovers isn't just decorative; It appears to be a spring-loaded knob that can be used to dampen the tweeter output. This is a two position button, when pressed it either stays slightly recessed or slightly protrudes. This gives you the ability to choose how bright you want the tweeters to sound. Again, there's no documentation in the box, so I have to assume the options are 0dB or -3dB. No matter what setting you choose, you won't get good sound out of these speakers. The tweeters are incredibly bright. They were fine when I hooked them up to my Kenwood head unit, right down to the highs (terribly low power), but there was almost no bass in the woofers. It didn't matter if I ran them at full bandwidth or with the crossover set to 100Hz or 125Hz. Try as I might, I couldn't fix the anemic bass with components. It wasn't helped by the fact that I had gotten the Infinity 6x9s about a month earlier and I'm pretty sure the factory JBL speakers (same company that owns Infinity) sounded much better. it only got worse. Now that the speakers have access to full continuous power (150 watts RMS per side), the tweeters have almost forgotten they were muted and now squeak and screech with all their might when it comes to anything above the normal hearing level. To make matters worse, I still don't have a tangible low-midrange with these speakers. I drive a 4 channel Hifonics amp front and rear that puts out about 150 watts RMS per channel into 2 ohms so I went with this amp. These speakers have a 2 ohm DC impedance to the main unit or amplifier. So unless your power supply is rated for a 2 ohm load I wouldn't risk it. Not that the speakers sound good anyway. With a punchy high-end and barely noticeable mid-bass, regardless of the crossover settings on the head unit or the amp (certainly not both at the same time), I've struggled to get any decent mid-bass out of them. Speaker. Struggle is probably not the right description because it implies that results can only be achieved with great effort. It's not relevant. It's entirely possible that these speakers would sound good with an external electronic DSP crossover, but as long as they're there, with all the hassles I've been through, all the expense (speakers, soundproofing, running new bigger wires in my doors) . , and buying a discrete amplifier to power them) I still can't get these things to sound good. By good I don't mean loud. They can definitely get loud. My deck's volume goes up to 35 and with the amp I set up the system so I can crank the volume up to 28-30 before the speakers strain or scream. The speakers just have no bass, even compared to the factory JBL speakers I had in my car prior to this update. And the tweeters want to rip your head off, dig into your eardrums and eat them for breakfast. you are so bad I checked several online forums before writing this review and others commented the same, no bass, too much treble. So buyers beware; It's not the old-school Infinity, with smooth, detailed highs and a nice subdued mid-bass that won't constantly remind you unless you've got at least one subwoofer installed. BTW, I also installed two 12" Alpine Type S subwoofers in a sealed box (for accuracy vs. bloated, boomy bass) and they get about 1000 watts (without taxing them more, although the amp has enough power). I supposed to put the components in one day and the amps and subs two days later. There is a huge sound hole where the mid bass should be so the subs don't help at all. It's the only way this setup sounds better than the factory system my Lexus IS (not that Mark Levinson system) is that there's a lot more bass and can play a lot louder overall, but it's not at all as balanced, smooth or satisfying as a Lexus, which I've heard good sounding systems from before, and which I have confidence built on Infinity, definitely not.. I will be returning these components. I will not upgrade to Kappa Perfects at 2.5x the price because I read on the internet that there ss they are also super stiff and have no mid-bass. No thank you. Should have kept it warm memories where Infinity still sounds good.
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