Audioenigma Posted June 17, 2009 Report Posted June 17, 2009 Hi, Thanks for checking out this post. I am a new member and I am totally confused of RMS-Ohms-Max Watts etc. Five years ago I wanted some nice sound in my SUV so I got rid of the stock cd/stereo and purchased an Alpine unit. I had the stock speakers removed and had 4 Infinity 5"X7" reference speakers installed in the four doors. I wanted a little bass so I had one 10" Infinity sub with box mounted in the rear. The amp for the sub is a (2 channel) Audiobahn A4002T Specifications 2 X 100 WATTS RMS 1 X 800 WATTS ACH POWER 800W Max, Intake Series 2-Channel Amplifier RMS Power Output: 100 watts x 2 chan. @ 4 ohms 200 watts x 2 chan. @ 2 ohms 400 watts x 1 chan. @ 4 ohms Bridged Max Power Output: 800 watts @ 2 ohms Class A/B MOSFET Circuitry PWM MOSFET Power Supply Semi-double Sided Glass Epoxy Circuit Board 4-way Protection Circuitry: Thermal, Short Circuit, Overload and DC Offset Air Induction Cooling Fan Cobalt Blue Illumination Speaker level (high-level) inputs Preamp outputs Nickel-Plated Block Terminals Optional Remote Bass Control (Audiobahn ABR100T sold separately) Optional Remote-mount Digital Volt-meter display (Audiobahn ADM100T sold separately) Variable Bass Boost Control: 0-18dB @ 45Hz Variable Low-Pass Crossover: 50-120Hz Variable High-Pass Crossover: 50-750Hz Signal-to-Noise Ratio: 100dB Frequency Response: 10Hz-40kHz Variable Subsonic Filter: 20-50Hz THD: 0.02% Phase Control: 0 or 180° Input Sensitivity: 200mV-8V The only thing the amp is used for is the sub. Over the years I have heard some awsome sounding systems and figured I needed to get an amp for the (4) Infinity reference speakers to make the mids and highs more noticeable. My wife purchased a (2 channel) Sony xm-ZR1252 amp for my birthday. I was told that the Sony was known to run HOT and having 4 speakers (2 front)+(2 rear) I was told I needed a (4 channel) amp. I have been checking out the 4 channel amps for 3 days. And will be taking the 2 channel amp back for a refund tomorrow. I am interested in the Kenwood KAC-X4R 1200W reference amp. Today I stopped in to an auto sound installation store to have some questions asked about the specifications of the KAC-X4R (Watts @4 Ohms and Watts@2 Ohms) to the 4 speakers. I am totally lost with the technical stuff. The sales associate listened to my system in the car and after he turned down the bass to the sub...told I had plenty of mid's and high's and a 4 channel amp. would not make much of a change in sound unless I had component speakers with (seperate tweeters) etc. He also said that maybe that the bass was turned up all the way and it was drowning out the mid's and highs. I thought to myself -what is the need for the sub if the bass is cranked down. Could one of you Pro's fill me in with any advice if I would have better sound with an amp for the 4 Infinity Speakers. I am looking for a nice sounding system and as you can tell I am totally confused Any information will be appreciated. Thank you. Audioenigma - Rick
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