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Car Forum / Driving, Maintenance, Tuning / Car Audio / July 2006Help With New Head Unit
Hi, I'm installing a replacement head unit and have run into a snag. The unit I'm replacing has 4 seperate speaker wires, for each of the 4 speakers. The new unit only has 2. How can I hook up all 4 speakers? Thanks You're saying that, for speakers only, your old head unit had 16 wires total coming out of the back of it?! Even if you're running components, that just shouldn't be happening. One speaker only requires two wires. All head units I've ever worked with have 8 wires total for speakers; two per channel/speaker. So unless I'm reading your question wrong, you should be good to go. ~Mister.Lull > Hi, I'm installing a replacement head unit and have run into a snag. > The unit I'm replacing has 4 seperate speaker wires, for each of the 4 > speakers. The new unit only has 2. How can I hook up all 4 speakers? > Thanks No, the old one had 8 wires total (4 pos/ 4neg). The new one only has 4 speaker wires (2pos/2 neg). Thanks for your reply. > You're saying that, for speakers only, your old head unit had 16 wires > total coming out of the back of it?! Even if you're running [quoted text clipped - 7 lines] > > speakers. The new unit only has 2. How can I hook up all 4 speakers? > > Thanks This is a "new" HU (head unit) you are trying to install and it only has two speaker outputs? That would be VERY unusual. What brand and model number is this HU? If we knew that, perhaps we could figure out the mystery here. ANY HU manufactured in the last 20 years (no matter how inexpensive) SHOULD have four speaker outputs (unless it is a HU that does not posses an internal amp, which I'm pretty sure is not the case here). MOSFET > No, the old one had 8 wires total (4 pos/ 4neg). The new one only has > 4 speaker wires (2pos/2 neg). Thanks for your reply. [quoted text clipped - 10 lines] >> > speakers. The new unit only has 2. How can I hook up all 4 speakers? >> > Thanks > This is a "new" HU (head unit) you are trying to install and it only has > two speaker outputs? That would be VERY unusual. What brand and model [quoted text clipped - 4 lines] > > MOSFET About 10 years ago pioneer had a number of units that only had internal amp to fronts only. There strategy was to get customers to add external amp for rears. also a lot of the very inexpensive head units only have 2 outputs. There are a number of different ways to wire the 2 channels. The most populat being to wire the 2 right side speakers in parallel and hook them to the right speaker output on head unit, then wire the 2 left sides in parallel to the left channel on the head unit. Another way is to parallel the fronts to one channel and the rears to the other. although the 1st option is better for stereo and balances left to right only, the 2nd option lets you balance front to rear only. Depending on speaker impedence, speaker may have to be wired in series instead of parallel. > > This is a "new" HU (head unit) you are trying to install and it only has > > two speaker outputs? That would be VERY unusual. What brand and model [quoted text clipped - 21 lines] > Depending on speaker impedence, speaker may have to be wired in series > instead of parallel. Yes, it is a very inexpensive HU. It's the cheapest one at Walmart, and yes, it's a dura brand. I know. Why? I wanted the cheapest way to be able to use my IPOD in the car. It doesn't have a fader, just balance. I really don't want to use an amp to power the rear, again because of the cost. Maybe I should ditch this one and spend a little more? > > This is a "new" HU (head unit) you are trying to install and it only has > > two speaker outputs? That would be VERY unusual. What brand and model [quoted text clipped - 21 lines] > Depending on speaker impedence, speaker may have to be wired in series > instead of parallel. >> This is a "new" HU (head unit) you are trying to install and it only has >> two speaker outputs? That would be VERY unusual. What brand and model [quoted text clipped - 10 lines] > There strategy was to get customers to add external amp for rears. > also a lot of the very inexpensive head units only have 2 outputs. Oh, that's interesting. I thought even the very cheapest had 4 speaker outputs. That's also interesting about Pioneer's strategy. In a way, that isn't too bad a concept, however, I would have it the other way around: designed so you have to buy an amp to power the fronts and have the deck power rear-fill. In theory it seems like it would be possible to design those two channels with twice as much power as a comparable four channel unit (say 50 watts RMS per channel, 100 watts per channel max). That's all the rear-fill power I would ever need. MOSFET |
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