Ohm's Help

[talli4life]

I did some reacher on ohms and that just confused me even more . So dont flame me if this topic has been discussed before.

Ok, I have a Kenwood Vintage amp (2ch) and speaker. It does speakers A "or" B at 8 ohms and A "and" B at 8 16 ohms. What i want to do is connect a sub to it. If i use both A and B i will be getting 16 ohms. I want to custom build a sub usuing the Dayton SA240 240W Subwoofer Amplifier for the sub. which is 4 ohms. Im trying to figure out how much ohms will the sub receive. So the kenwood amp will send 16ohms to the 4 ohm sub amp and then how much will the sub amp send to the driver.

The sub amp plate also has two output channels, so if i were to connect two more speakers to the system how much ohms will they receive?

This is asking for a lot and i would really appreciate it if someone could point me in the rite direction.

 

[GO-NAD!]

I did some reacher on ohms and that just confused me even more . So dont flame me if this topic has been discussed before.

Ok, I have a Kenwood Vintage amp (2ch) and speaker. It does speakers A "or" B at 8 ohms and A "and" B at 8 16 ohms. What i want to do is connect a sub to it. If i use both A and B i will be getting 16 ohms. I want to custom build a sub usuing the Dayton SA240 240W Subwoofer Amplifier for the sub. which is 4 ohms. Im trying to figure out how much ohms will the sub receive. So the kenwood amp will send 16ohms to the 4 ohm sub amp and then how much will the sub amp send to the driver.

The sub amp plate also has two output channels, so if i were to connect two more speakers to the system how much ohms will they receive?

This is asking for a lot and i would really appreciate it if someone could point me in the rite direction.

I'm not sure if I understand correctly, what you want to do. Do you intend to go from a pair of speaker connections on the Kenwood to the speaker level connections on the sub amp? Are there no pre-outs on your Kenwood? That would be preferable, but if it doesn't you can go with the speaker level connections.

For the record, your amp doesn't send any ohms anywhere. That spec tells you what the nominal impedance of the speakers should be, depending on if you use 1 or 2 pairs. That sub, with it's own amplifier, won't really care either way. If you are going to use speaker level connections and are using one pair of speakers and the sub, just connect speaker wires to one set of binding posts on the Kenwood and the other ends to the speaker "in" binding posts on the sub amp. Run another pair of wires from the sub's speaker "out" binding posts to your main speakers. The sub's internal crossover will split the signal - low frequncies will be diverted to the sub's amplifier, while the higher frequencies will be passed on to the main speakers.

Hope that helps.

 

[trnqk7]

That just tells you what impedance (approximately) the amp is expecting to see. Meaning that it will not be stable or might overheat if you attach a speaker that is less than 8ohms (ie 4ohms). The 2 channel inputs on your sub amp are high level inputs-the sub amp will only take the low frequencies from the signal there to the sub and pass through the highs and mids to the other speakers you have attached. The impedance of the sub doesn't matter to the Kenwood amp unless you were to bypass the sub amp (which you are not doing).

Again, nothing is receiving ohms. The ohm rating is an approximation of the impedance of the speaker either over a range of frequencies or a specific frequency. It only gives you an idea of the true impedance, but it's a decent place to start and all that's necessary in most cases. As long as the speakers you hook up to the Kenwood amp are rated 8ohm or 16ohm nominal, you will be fine-whether they are directly connected to the kenwood amp or through the high level outputs of the sub amp.

 

[markw]

A subwoofer amplifier is not a speaker.

while the speaker that sub amp is driving may be four ohms, it will never see the output of your receiver.

Your receiver will see the input of the subwoofer amp, which is very high and willnot affect the operation of the receiver in any way.

IOW, just connect the receiver's speaker outputs to the speaker level inputs of the plate amp. It's a very high impedance. You'll be fine.