• For option #2, unless the stock stereo’s front/rear fader is kept at the middle position (equal) you would use the front channels for both the front speaker signals and subwoofer signal to the amp. You may need a few extra parts. I just got a Pioneer head unit and a 2 channel power amp 400.2/800 bridged plus subs are wired to 4ohms but the subs are 8ohms a piece what in asking how can I set my gains and crossover correctly. In the case of a car amplifier that can’t go below 4 ohms per channel, there’s no other way. That’s probably going to be easier, plus if you want to remove the amp later and sell the car etc it’ll make that easier, too. I recommend avoiding speakers with mylar/plastic dome tweeters as the sound just isn’t as nice as those with a better tweeter. Hi Steve you can do that as long as your amp is 2 ohm compatible in stereo mode (to wire 2 speakers in parallel on the front channels). My head unit is a sony cdx-1200u if that helps. The amp is 4 channel. 2 channel, 4 channel, even 8 channel. So don’t worry you should be ok. You’ll need at least one pair of RCA cables, or 4 if using a front & rear fader if the radio has 4 outputs. Yes is mono and the second terminal isnt for a second channel only so you have more room to connect wires. I also replaced the 4 door speakers with Pioneer TS-A652F 6.5 3 way speakers, and a kicker pt250 BassStation 10″ powered sub. When you wire the subs as shown in the diagram below, the total impedance will be four ohms. Can I connect to RL and RR. How does it work when the amplifier got a harness for all the wires to each 4 speakers? That’s because for blown speakers the voice coil no longer has a complete electrical path you can measure. I’ve used some like these over at Amazon. 4 ch amp not the best choice for what you need it for....but if you already have yeah......just bridge the subs to the amp in series circut. To better undertsand Ohm Load/Impedence please read our article “Understanding Impedence.” in the articles section or by clicking HERE ***PLEASE NOTE*** All information on this site is … Would be all highs with a little bump in the back ground 2 speaker-level inputs. Pre-loaded subwoofer enclosure: 12″ ported subwoofer enclosure example (under $100 USD) That’s something useful to keep in mind. NOTE! You could do that for now to get you by if you like, then perhaps add a second small amp for the subwoofer later on, allowing you to get back the ability to have a front/rear fader. If your sub is svc 4 ohm, you can wire each sub straight to each channel of your amp and get 4 ohm load. I would recommend a 5-channel amp with at least 50W RMS per channel for the main speakers and 250W+ for the subwoofer channel, and 2 ohm capable too. The GM-D1004 is rated for down to 2 ohms in stereo mode, actually, but that shouldn’t matter in this case. i have a kicker zx650.4 amp and two 2 ohm DVC memphis m3 12" subs. – JBL Co-axial (rear) That way you can safely drive each channel with a 4 ohm load even older amps can handle. Most amps would need to be connected to a signal for the rear channels also but since yours has a 2/4 ch. You'll find a ton of great info articles under my How-To & Info menu section or try the search box above. Left channel to front left, rear left. You’ll get a LOT more for your money using a good head unit rather than an amp with Bluetooth built in. Copyright © 2017-2021 SoundCertified.com. Do I then just connect RCA for the front to channel 1&2? Wire them parallel. For typical amps that’s around 50W-100W/channel for a 4 channel amp. That’s especially true if you think you might upgrade your amp to a higher power one at some point. Thank you Jeff that’s very kind of you. Driving 4 speakers from 2 channels means the speakers are sharing the amp’s power, so you’ll have less power available to each of those. Bridge each subwoofer to 2 channels, one on top, one on bottom, and you will get more wattage. Power resistors are larger versions of the resistors used in many electronic products. ? Should I also bump up the wattage of the other two resistors for the 6 X 9’s to 50W 4 ohm? For your amp you can just set the 2/4 channel amp switch to the “2” position, then bridge 2 channels and set the low-pass crossover. If so you’ll probably want to connect those or replace with aftermarket ones & add them too. It all just depends on the installers preference, and wiring the 2 subs together in parallel to one out put saves some wire (only a foot or two per job, but in a shop that adds up). There aren’t enough channels to have both the proper power & channels you need and drive a subwoofer. Yes you sure can! For your amp you can just set the 2/4 channel amp switch to the “2” position, then bridge 2 channels and set the low-pass crossover. That’s enough for decent bass depending on the subwoofer, box, and vehicle you have. What would be the best combination to get best sound output and “left to left/right to right” sound effect? You said ch.5, but I do not have 5 channel ☹️, let me know if I fail to understand it correctly. Not too concerned about the speakers being on one channel as the head unit is mono output anyway. Since your Pioneer amp has the added bonus of RCA output jacks, here’s how you’d do it: Sony MEX-BT2500 speaker outputs -> line level adapter -> RCA to inputs on Pioneer amp -> RCA outputs to Coustic amplifier. How can I repay you? The amp output to FL, FR, RL, RR. Hello Andi. There’s just no way around it. Have a good day. You can use 2 subwoofers, but the total load will have to be 4 ohms (unless it supports 2 ohms in bridged mode. I have factory 2 ch. Realistically, it depends on how hard you drive them. That takes a huge resistor. Note that system #1 shows using a 2 ohm capable amplifier. Hello there & thanks for the feedback, Joe. I’ll figure out the amp settings so no worries on that, I’d personally start with the head unit. It was completely overpowering any sort of lyrics So I’m not sure what to do when wiring for new speakers. Yep, you’ll have stereo sound as long as it’s connected correctly. The Pioneer’s internal circuitry scales down the speaker level signals to line level. Basically paralleling the RCA inputs like speaker output. To measure the Ohms (resistance) of a speaker’s voice coil, hold the meter probes to the speaker terminals, making sure to keep firm contact to bare metal Paint, insulation, dirt, and solder flux can mess up your reading otherwise. input switch that shouldn’t be needed. Hi Rebza. if you had 1 DVC 4 ohm sub, you could run it on a 2 ohm load, but with two, you can only run them on a 1 ohm or 4 ohm load. The owner’s manual says 4 ohms but after I read your comment I checked Pioneer’s web site and it confirms the 2 ohm rating: 45 watts x 4 at 2-ohms with <1% THD+N. – This is probably an issue with not having a signal to the last 2 channels (5 & 6) where you would have the subwoofer bridged However, neither of those options are the best. Thank you, I’ll definitely spread the word about your site on my forums. Let me know in the comments below if you have questions or comments. Understand zone 2 speakers would not have the power of zone 1, but could adjust volume in that zone. Thanks Brooks, Hi Brooks. What do you think of the answers? 2 Rockford Fosgate 8 ohm 10″ subs in a dual sub box (RFZ1810) To help, I would use the amp’s high-pass crossover set to about 50-60Hz for the door speakers to keep distortion low and you can get more volume/power from them without them bottoming out. It won’t make any difference using 1 or 2 in this case since the subwoofer outputs are mono & identical. One more question. There’s enough power there to drive your system with some good clean sound you’ll enjoy. Not sure where it leads….perhaps to the controls on the driver cockpit area. You’ll want the amp to have decent power, however, because when speakers share an amp channel in parallel, they split the power. However, it’s worth a try to see what you think & if it works for you! As I mentioned above, most car amps today can handle a 2 ohm load per stereo channel (left & right channels) and 4 ohms minimum when bridged to drive an amplifier (called “mono”). 3 & 4. Here is my question: To channel 1, I’ve attached the lower left side speakers I know those were not used previously but should I try connecting those to the amp as well? If my calculations are correct I’ll have a modest 50watts to each speaker and 200watts to the sub. That should take care of it. I'm just wondering if it will pull the same resistance if it wire both parallel directly to it as it would if it wired sub 1 to sub 2 then to the amp. -or- I am 48 and no stranger to connecting amps and subs. I am SO grateful. Not competition-level, but good enough to enjoy. I recommend at least 25 watt (25W) 4 ohm resistors. Be sure to touch bare metal on the terminals and make good contact. 4 speakers , 2 subs, 4 channel amp - Well I like to install 2 fronts 2 rears and 2 subs using my 4 chennel amp can I do this and is so whats the best way to get it done? Can i connect factory unit with amp? You can get 160W for your subwoofer(s) by bridging the rear channels, but that leaves 2 channels which can only be 2 x 75W/110W RMS stereo or 160W mono. The GM-D8704 has speaker level inputs built in that will let you connect directly to the speaker level outputs of the Sony head unit. Connect a decent quality line level adapter to the head unit speaker outputs. Shown: Example of a 4-channel amp bridged to 2 channels. Sorry if its been asked already. Using a 2-way crossover with a tweeter and woofer will look like a single 4 ohm speaker to the amp and together with a 2nd speaker would be 2 ohms total. Get some good subs and a good amp and let it rip! In all cases you should a wire that switches on/off with the ignition switch ACC (accessory) position. :). I don’t need front and rear speakers and I have a 2 channel Sony XM-1502SX amp lying around which will fit under the seat. Love the period look but it’s almost inaudible after 40mph due to the road and wind noise so need more volume. You can save money on the subwoofer and still have excellent bass, so have a look at the Skar or Rockville subwoofers. Adjusting the fader would affect the volume to the main speakers vs the subwoofer but doesn’t serve any purpose in that case so you’d leave the fader set to the middle. Slide the wire through until you reach the glovebox or the opening underneath your glovebox where your wires feed into your vehicle’s interior. had two x-15 have them wired down to 1 ohm running a sundown sbf-5000.1. Hence the outputs could NOT be bridged. However, as crazy as it sounds, some speakers don’t! Most part system from one amplifier output similar question but with a channel... 6 channels but the RMS power of zone 1 radio has rear and front channels ( 4 ) SPS-M601W. Setting like the flip up door with the 5-channel Pioneer GM-D9705 question but with a nice-sounding 4 and... 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