BI-WIRE 2

[JOHN FICKEL]

Put aside wether you should BI-wire or not. On a 2 channel amp can
I use a and b instead of spicing in just A ? For Bi-wiring ?

 

[highfigh]

Put aside wether you should BI-wire or not. On a 2 channel amp can
I use a and b instead of spicing in just A ? For Bi-wiring ?

You can, but there's no benefit unless the wire is too thick for the terminals. If that's the case, just use banana plugs.

In many cases, switching to A+B puts the speakers in series, which would eliminate any benefit of bi-wiring and that means it surely isn't bi-amping.

The easy way to tell if A+B is series- connect one set of speakers and switch it to A+B- if the sound stops, it's series. If not, they're parallel and the rear panel should have some kind of info for speaker loads.

 

[JOHN FICKEL]

Thank you. The amp I'm using is a Yamaha MX-1 for a pair of Klipsch RF-7ii. The Amp is internally wired in parallel . Back in the day I used two pair of Cerwin -vega 15's and when I switched on b it did not sound like it took anything away from the A CHANNEL. However it's still just a two channel amp
200watts into 8. 260 into 4 ohm and 320 into 2 ohm
Now I'm just going to bi-wire on pair of RF-7ii. Instead of spicing the amp side. I figured use b too. Since I'm not ever going to use b.

 

[JOHN FICKEL]

The back of the amp says A or b 2ohm min

A + B 4 ohm min

 

[JOHN FICKEL]

And I did turn on b and the sound did not stop. With only one pair of speakers hooked up

 

[JOHN FICKEL]

You can, but there's no benefit unless the wire is too thick for the terminals. If that's the case, just use banana plugs.

In many cases, switching to A+B puts the speakers in series, which would eliminate any benefit of bi-wiring and that means it surely isn't bi-amping.

The easy way to tell if A+B is series- connect one set of speakers and switch it to A+B- if the sound stops, it's series. If not, they're parallel and the rear panel should have some kind of info for speaker loads.

It's parallel. For sure. A+b 2ohm min

 

[PENG]

It's parallel. For sure. A+b 2ohm min

Yes, it has got to be parallel. You are doing the right thing, enjoy the bi-wire sound.

 

[JOHN FICKEL]

Yes, it has got to be parallel. You are doing the right thing, enjoy the bi-wire sound.

Lol. Yea I miss spoke. It's A + B 4 ohm min
When using just A OR B it's 2ohm min. Yamaha
Says its def parallel. Thank you for the responses
One more question. Do I need to be concerned with the
Ohms of the HF AND LF. Or is the amplifier going to see the same overall impedance whether you have it wired regular or bi-wired?

 

[JOHN FICKEL]

Whether you have the speaker bi -wired too just the A terminals, or bi-wired to both a A and B Should the overall impedance be the same ?

 

[highfigh]

Lol. Yea I miss spoke. It's A + B 4 ohm min
When using just A OR B it's 2ohm min. Yamaha
Says its def parallel. Thank you for the responses
One more question. Do I need to be concerned with the
Ohms of the HF AND LF. Or is the amplifier going to see the same overall impedance whether you have it wired regular or bi-wired?

You need to be concerned with the cumulative impedance- the amp may handle 2 Ohms, but if A and B are used, parallel will result in Z= (Z1xZ2)/(Z1+Z2).

This is basically moot, though. If you removed the jumper on the speakers and connected each set of binding posts to Speakers A and B, there's really no difference- the speaker wires would be taking the place of the jumpers and the amp won't know the difference unless the wires have more resistance.

 

[PENG]

Whether you have the speaker bi -wired too just the A terminals, or bi-wired to both a A and B Should the overall impedance be the same ?

Virtually the same.

 

[JOHN FICKEL]

Thank you everyone!! For your help. I love this site.

 

[Swerd]

One more question. Do I need to be concerned with the Ohms of the HF AND LF. Or is the amplifier going to see the same overall impedance whether you have it wired regular or bi-wired?

To add to what highfigh and Peng said, a speaker's impedance is the total of all it's drivers and crossover through the audio frequency range. Its not a single value, it varies with the frequency.

Below is a graph of the impedance of the RF-7ii. I copied from this link http://www.avsforum.com/forum/89-speakers/1412510-klipsch-rf7-ii-measurements.html.

The black line shows impedance and the vertical scale on the left side show the ohms values. As you can see the impedance dips slightly below 4 ohms between 100 and 200 Hz. That is where these speakers might present a difficult load for some amps. All the rest of the audio range the impedance is higher. However, I wouldn't worry, your amp seems to be capable of easily driving these speakers. (The green shows impedance phase angle in degrees - ignore that for now.)

 

[JOHN FICKEL]

To add to what highfigh and Peng said, a speaker's impedance is the total of all it's drivers and crossover through the audio frequency range. Its not a single value, it varies with the frequency.

Below is a graph of the impedance of the RF-7ii. I copied from this link http://www.avsforum.com/forum/89-speakers/1412510-klipsch-rf7-ii-measurements.html.

The black line shows impedance and the vertical scale on the left side show the ohms values. As you can see the impedance dips slightly below 4 ohms between 100 and 200 Hz. That is where these speakers might present a difficult load for some amps. All the rest of the audio range the impedance is higher. However, I wouldn't worry, your amp seems to be capable of easily driving these speakers. (The green shows impedance phase angle in degrees - ignore that for now.)

[/QUOTE

To add to what highfigh and Peng said, a speaker's impedance is the total of all it's drivers and crossover through the audio frequency range. Its not a single value, it varies with the frequency.

Below is a graph of the impedance of the RF-7ii. I copied from this link http://www.avsforum.com/forum/89-speakers/1412510-klipsch-rf7-ii-measurements.html.

The black line shows impedance and the vertical scale on the left side show the ohms values. As you can see the impedance dips slightly below 4 ohms between 100 and 200 Hz. That is where these speakers might present a difficult load for some amps. All the rest of the audio range the impedance is higher. However, I wouldn't worry, your amp seems to be capable of easily driving these speakers. (The green shows impedance phase angle in degrees - ignore that for now.)

Thank you

. Thank you again. Swerd