6 speakers w/ a 4 channel amp??


life is good

Junior Member
Feb 26, 2010
4
0
tampa fl
I have a 4 channel amp that currently runs 4 6.5" speakers in my boat. I want to add two and maybe even 4 additional 6.5" speakers. Can I just add the wires to the terminals on the amp or will I mess something up? Is there anything i can do to avoid buying another amp?

Thanks in advance!!

 

misfit138

a whole new type of aids
10+ year member
Jun 7, 2009
12,484
455
Williamson, WV
- Take note of your current speaker's specs (impedance, rms rating, etc).

- Take note of your amp's specs.

- Go to google and search for wiring diagrams.

 

keep_hope_alive

Acoustics Engineer
Premium Member
10+ year member
May 1, 2007
7,428
195
Quad Cities, IL
- Go to google and search for wiring diagrams.
it's this a car audio forum where people get answers to questions?

life is good - tell us what speakers you have (and their impedance) and what amp you have and we can give you direction. any links to amp specs are great and save us time.

most likely, you have four 4 ohm speakers now and your 4 channel amp is 2 ohm stereo stable. if that is the case, you can connect one additional 4 ohm speaker in parallel to each output. so each channel could power two 4 ohm speakers - for a 2 ohm load. let us know if that doesn't make sense.

if you have 2 ohm speakers, you can't add any more unless the amp is 1 ohm stereo stable (less likely).

if you refer to the owner's manual for your amplifier (hard copy or online) it will include wiring diagrams. always take note of the impedance of your speakers and how they combine (series or parallel) for a final impedance load on the amplifier.

make sure all connections are solid, secure, and safe from shorting wires or strands.

 
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misfit138

a whole new type of aids
10+ year member
Jun 7, 2009
12,484
455
Williamson, WV
it's this a car audio forum where people get answers to questions?
If he's too lazy or stupid to research his own equipment and figure out how to wire his speakers, he doesn't need them in the first place...

 

keep_hope_alive

Acoustics Engineer
Premium Member
10+ year member
May 1, 2007
7,428
195
Quad Cities, IL
If he's too lazy or stupid to research his own equipment and figure out how to wire his speakers, he doesn't need them in the first place...
so this is a place where people who already know the answer to a question can ask it in futility? it's a valid question, the majority of people don't understand impedance, parallel wiring, and amplifier loading. he's asking the question, that's the first step in the right direction, it means he wants to do it right. i see all to often people who SHOULD have asked questions instead of driving around with fire hazards.

sure, if everyone read their owner's manuals sections like this wouldn't be necessary. but that doesn't happen. they could call a professional and pay them to help, and they should. but if a person wants to DIY then that's what this site, and others, are for.

to the OP. you're welcome at Sound Domain if this doesn't work out.

http://forum.sounddomain.com/ubbthreads.php?ubb=cfrm

if you don't want to help, don't. boost your post count in OT.

hell, this section is titled Car Audio Help 101.

 

hatedonmostly

throwin' hunnits, hunnits
10+ year member
Jun 8, 2009
6,537
148
Detroit, MI
so this is a place where people who already know the answer to a question can ask it in futility? it's a valid question, the majority of people don't understand impedance, parallel wiring, and amplifier loading. he's asking the question, that's the first step in the right direction, it means he wants to do it right. i see all to often people who SHOULD have asked questions instead of driving around with fire hazards.
sure, if everyone read their owner's manuals sections like this wouldn't be necessary. but that doesn't happen. they could call a professional and pay them to help, and they should. but if a person wants to DIY then that's what this site, and others, are for.

to the OP. you're welcome at Sound Domain if this doesn't work out.

http://forum.sounddomain.com/ubbthreads.php?ubb=cfrm

if you don't want to help, don't. boost your post count in OT.

hell, this section is titled Car Audio Help 101.
Exactly, misfit directed him to look up wiring diagrams. What better way is there to learn how to calculate impedance?

 

keep_hope_alive

Acoustics Engineer
Premium Member
10+ year member
May 1, 2007
7,428
195
Quad Cities, IL
Last edited by a moderator:

misfit138

a whole new type of aids
10+ year member
Jun 7, 2009
12,484
455
Williamson, WV
so this is a place where people who already know the answer to a question can ask it in futility?
Who said anything like that?

the majority of people don't understand impedance, parallel wiring, and amplifier loading.
People start new threads about basic wiring on a daily basis. Instead of answering the same question 1,000,000 times, I find it best to tell them to use google and research the topic for themselves. Spoon feeding people does nothing for them in the long run.

if you don't want to help, don't.
I did help. I told him EXACTLY what to do.

boost your post count in OT.
I'll post whenever and wherever I want. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

hatedonmostly

throwin' hunnits, hunnits
10+ year member
Jun 8, 2009
6,537
148
Detroit, MI
telling someone to do a google search isn't helping. posting a pic of a wiring diagram is helping. car audio help 101 is just what questions like this are for. if you two are burned out helping n00bs then let others help.
Electrical basics and Car Audio links:

Wanna know more? Links and References

Ohm's Law --- Ohm's Law calculator --- Wiring Harness Color Codes --- Wire Sizing Chart
Okay, let's just say that, speaking hypothetically, I don't know how to change a car's oil. Should I a.) go straight to a message board, join the site and be spoon fed answers, or b.) Google "how to do an oil change" where I can browse through thousands of tutorials showing how to do it on various sites?

Seriously, anytime I have an issue or question, I GOOGLE AND DO MY OWN RESEARCH FIRST BEFORE ASKING.

 

keep_hope_alive

Acoustics Engineer
Premium Member
10+ year member
May 1, 2007
7,428
195
Quad Cities, IL
//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif glad I have your attention.

if it's the same question, provide the shortcut to the other thread. you're a regular, you remember the other threads. look them up for them.

link to an image, you're good at google searches because you know the terminology to use. n00bs don't even know where to start.

respond to the question so they have an answer. send them somewhere specific where you know the answer is. a link to an owner's manual for example.

it takes less time to give a complete answer as it does to argue about why you don't want to answer. ya know?

i'm here to help people, even n00bs.

it's a moot point now, until we know the specs we can't provide any further advice.

 

keep_hope_alive

Acoustics Engineer
Premium Member
10+ year member
May 1, 2007
7,428
195
Quad Cities, IL
Bullshit. There are plenty of wiring diagram sites on google. Here, I'll show you: Let me google that for you
that's bad advice. how is he to know what wiring diagram is correct? if he knew that, he wouldn't ask. is he supposed to just pick one of those results and try it?

he needed to be told to find the specs for the drivers and the amp. you did that, great. then he should come back with that info so we can give him a specific answer of how to wire the speakers to the amp. at which time a diagram or specific link could be given.

 

misfit138

a whole new type of aids
10+ year member
Jun 7, 2009
12,484
455
Williamson, WV
if it's the same question, provide the shortcut to the other thread. you're a regular, you remember the other threads. look them up for them.
Oh, the other threads. Yeah, they're helpful. Most of them are the same as this one. Someone suggests google and someone else posts an image from 12volt.com.

Right about now I'm going to respectfully decline all of the advice you're dishing out for me. I really don't need you to tell me how to be a productive member of ca.com.

link to an image, you're good at google searches because you know the terminology to use. n00bs don't even know where to start.
Why link a single image when I can direct them to a website that'll show them what they want to know and more?

it takes less time to give a complete answer as it does to argue about why you don't want to answer. ya know?
This is advice that you could take to heart as well. In the end, you provided no more information in this thread than I. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

i'm here to help people, even n00bs.
I do my fair share of helping people on this forum.

it's a moot point now, until we know the specs we can't provide any further advice.
I gave the opening poster all the information he'll need. He can get model numbers from the equipment itself and use them to find specs. Then he can search google for wiring diagrams. It's pretty straight forward stuff, really...

 

SuperJay

Mobile Solutions Guru
Feb 27, 2010
15
0
Rancho Cucamonga, CA
Is it really spoon feeding to be helpful? All that was really done here was send someone to google. Don't be afraid to actually help when people ask for it. I know, most of you feel some sense of entitlement, or elitism because you know how to install a stereo. Hell, I've been doing this for 20 years, 16 of that has been professionally. I still take the time to help the n00bs who ask for help. It's the kids who don't even know the right questions to ask who need our help the most. Teach them the right questions to ask, and how to find the solution themselves, instead of telling them they aren't smart enough to do the job. I installed my first alarm at 14 years old. Did I have any business doing it? Probably not, but I learned from that, and each subsequent install. I still learn something from most installs.

If you're fed up with the repeated questions from people who have little to no experience, maybe it's time for you to take a break from the forum. Hell, go hang out in off-topic and bullshit with your e-buddies until such time as you feel you can come back and give a proper and helpful response to the annoying n00bs who keep asking the same questions, over and again, and who seem, for some reason, to ignore the search function.

 
OP
L

life is good

Junior Member
Feb 26, 2010
4
0
tampa fl
Well to some thank you for your help! To the others thanks for nothing. I am not sure who said it, maybe misfit?, that if it don't know how to figure out impedence on a speaker I dont deserve speakers. That is a stupid statment. I don't know how to build a house either, does that mean I should have to live under a bridge? No wait I don't know how to build a bridge either. I guess I'm screwed.

I have sony marine speakers and an sony xplode 4/3 channel amp. I ahve looked them up online and believe I have found the answers to your questions. Let me know if not. I bought the boat used so I don't have the original manuals.

amp:

Band : Low Pass Filter: 80 HZ, -12dB/oct High Pass Filter: 80 HZ, -12dB/oct

Circuit System : OTL Output Transformerless Circuit Pulse Power Supply

Frequency Response : 5 Hz - 100 Khz (+0/-3 db)

Harmonic Distortion : 0.005% (at 1 kHz)

Impedance : 2-8 Ohms Stereo, 4-8 Ohms Mono

Input Level : 0.3 - 6.0V (RCA input) 1.2 - 12.0V (High Level Input)

Low Boost : 0 - 10dB (40Hz)

Noise Level : 90 dBA

Power Supply : OTL Output Transformerless Circuit Pulse Power Supply

Speakers:

Frequency Response : 35-26,000 Hz

Impedance : 4 ohms

Sensitivity (db) : 91 dB/1W/1m

Thanks,

Ken

 

keep_hope_alive

Acoustics Engineer
Premium Member
10+ year member
May 1, 2007
7,428
195
Quad Cities, IL
thanks for the info Ken!

you're good to go for parallel wiring. you have four channels on the amp, each with (+) and (-).

each channel can power two 4 ohm speakers. when you wire two 4 ohm speakers in parallel: two wires in (+) amp terminal and two wires in (-) amp terminal- you half the impedance to 2 ohms.

the next decision is which speakers you want to combine. you still have level control via fader to turn some speakers off. so group them logically.

i did a 6 speaker install in a boat using a 4 channel amp. i devised a switching system that lets the owner choose how he wants to power each pair of speakers - either from the HU or from the amp. he knows he can only run 4 speakers from the HU. why the HU? - because of low power listening at night. if you're interested in some details on that PM me.

let us know if the owner's manual doesn't give you the diagram you need for parallel wiring.

 

SuperJay

Mobile Solutions Guru
Feb 27, 2010
15
0
Rancho Cucamonga, CA
Ken,

parallel is easy. just connect the positives together and the negatives together on two or more speakers. That's parallel In your case you would only be connecting 2 speakers to one channel on the amp.

KHA is right about choosing the grouping so you can choose between areas on the boat that will get sound.

 

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