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Rca rc210bp subs

What size amp should I use on two 500w subs?And how many channels do I need?

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700 to 1000 watt two channel or monoblock amplifier.

Posted on May 30, 2008

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What amp would be better to use with what speakers/sub? I have a KAC-7202 kenwood 920W maximum power (150wX2 RMS, 4ohms) (230wX2 RMS 2ohms) and then the other amp I have is a Alpine MRP-M500 mono power...


I'm using that Alpine right now for 2-12" subs and I have compared it to 6 or 7 other amps this month and most were 4 channel 150Watt/Channel Bridged to 300Watts x 2 and found the Alpine to be superior in both sound quality and loudness. The Alpine has also not turned off even with full volume for hours at a time, Very solid amp I was very surprised due to it's size!

Apr 04, 2013 | Kenwood Car Audio & Video

1 Answer

Hook up lanzar 4 channel amp, directions say to use single rca cables with y connectors. my stereo has L/R rca outputs for front, rear & sub total of 3 sets =ing 6. amp has total of 4 one rca...


Well personally i would probably use two channels to run all the highs and bridge the other two channels into one mono to run the sub ..

Jun 02, 2011 | Car Audio & Video

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My sub stopped working today made a weird noise then cut out i had a 500w amp and 500w 10'' subtube i connected the sub to 3 other amp set ups all the amps work and power other subs but my sub wont make...


did you check the fuse if you have one on it. also u want to have more wattage on your speakers than your amp to protect from blowing your speakers.

Jul 29, 2010 | M-Audio Car Audio & Video

1 Answer

How do i set the rca settings for my kenwood kdc-217


Theres no way to change the rca settings. More than likely they put out 2 volts which is more common. Some newer more expensive models put out 4. What size remote wire you using? Try using a bigger (smaller #) gauge wire. That will give it a boost if your using the one that came with an amp kit. What kind of speakers? What kind of amp? If amp is mutli channel and only one sub then you will need to bridge the amp. Try different combos of + and - to see which gives the best. Also make sure everything is turned up on the amp and set to low pass frequency.

Jun 22, 2010 | Kenwood KDC-217 CD Player

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Im trying to run two kenwood 6/9,s and a mtx sledge hammer 12'' sub of a mtx 6004 amp.where do i put my rca,s front or rear / and if this is poss how do i bridge the sub ????? im lost


Im kind of confused with what exactly your asking. Are you trying to run 3 subs off of an amp? If so, the RCA's should go to the front of the amp, and if your plugging 3 subs in to it, you need to have a 3+ channel amp. There is a way to hook it up differently though. I have 4 12" Hifonics subs running off a 2400 watt Nitro-BMW-486 amp. I just have two subs running to each of the two channels.

Sep 26, 2009 | Car Audio & Video

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Subwoofer buldging out problem


When speakers are wired in the wrong way the will do the "pushing out" you're describing. Basically the polarities have been reversed and if kept like this over a period of time will blow the speaker. Best thing to do is to disconnect the power by the negative on the amp and take out the fuse from the power supply. Check the wires running from the amp to the subs, negative to negative and positive to positive. I know it sounds basic but many people do mix it up! I would also check to see what channels the subs have been wired into?

Best way is to have one sub from channel 1 and the other sub from channel 2 for example. Or if its a bridged 4 channel amp, have 1 sub running from channel 1&2, and the second sub running from channel 3&4 still making sure of the polarities. Again this all depending what kind of amp and sub you have.

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For example;
A 4 channel (bridged) 1000W amp. 250W max per channel or 500W per 2 channels! So if you have 2 500W subs, by connecting one to a single channel will decrease subs ability due to the lack of power supplied. However by combining 2 channels you optimize the output!
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Once you know all your wiring from your amp to subs are ok/good connections/good wires etc you shouldnt have to "wiggle the wires" to get it to work as this is just a bad connection. Also ensure that no 2 wires are touching. Make sure that the master volume on the amp is turned down. You dont need this to be on loud at all, in fact far from it or you'll risk damaging both the amp and subs!

Hope this helps!

May 27, 2009 | Car Audio & Video

1 Answer

I have all the wires running right but for some reason my amp is not picking up or pushing my subs. could the rca jacks be messed up on the stereo?


According to the specs for the xo 1945- the output is; 50W x 4 Max Power Output , and I do not see a pre amp output listed. So I think to connect subs, you will need a separate AMP.
The way this works; the rear speaker wires from the xo 1945 hook into the Add-on amp, for example a 4 channel amp. In a 4 channel amp, the rear speakers come off two of the channels of the add-on, and the subs come off the other two channels. There is also the option of bridging two channels for more output power to ONE sub.
You did not mention what size sub(s) you were thinking of adding, but keep in mind that the ox 1945 puts 50 watts MAX per channel. So, if you add two 12" subs and a 1500 watt amp to drive them, your total sound is going to be very uneven.
If you go on line and look up auto audio or amps, you'll get a good idea of all the Sub and amp options that are available.... Hope this helps.

May 02, 2009 | Car Audio & Video

1 Answer

Sub woofers and amp


first of all is the amp a four way amp? if so then you need to know what the watts of the subs are (you dont want to melt them) wire + and - of channels 1 and 2 to one sub and + and - of channel 3 and 4 to second sub, nice thick lead from battery positive (fused) to positive terminal on amp thick lead from a good earth point to negative terminal on amp run a set of rca leads down the opposte side to the positive wire to prevent interference, run thin wire from remote wire of radio to the remote terminal of amp, rca's are plugged in at stereo and at the am. may need a RCA splitter to be able to power all four channels

Good luck Davelee

Mar 24, 2009 | Car Audio & Video

1 Answer

Jensen LXA400 Fuse Size and RCA hook up for 2 channel mode?


take it to a stereo shop. there are variables you may not be aware of when hooking up speakers to an amplifier like ohms, very important!

Dec 08, 2008 | Jensen LXA400 Car Audio Amplifier

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