Adding a pair of 8 ohm speakers in spite of the user manual...

[vigusmao]

Hello everybody.

Apologies for the noob question.

I have recently bought a Marantz PM6007, and I'm using a pair of 4-Ohm B&W DM610. The sound is great to my ears.

Here's the question. I'm considering adding a pair of lower power speakers to output B just to add some ambience, but the manual says that, in order to have two pairs of speakers (one at output A, one at B), both sets must be 8-16 Ohms. A 4-Ohm pair of speakers should be the only one in the system (connected to A, nothing at B). Since I have the B&W's at output A, there's absolutely no way I could connect a 2nd pair of speakers to output B? What would be the consequences of attempting to do so?

Thanks, guys!
Vinícius

 

[Another Johnson]

Your amp does not want to have less than 4 ohms as its load.

4 ohms = 4 ohms.
4 in parallel with 8 is less than 3.
4 in parallel with 16 is just a tad over 3.
8 in parallel with 8 is 4.
16 in parallel with 8 is a bit over 5.
16 in parallel with 16 is 8.

So … once you’ve got one pair of 4 ohms, adding anything else will draw more current than your amp will want to handle. It may sound OK, but it will most likely have a shorter than normal life. And it may not sound OK since you’ll be making your amp work harder than intended.

Take the fours off and run two pairs of 8s if you really want to have two stereo pairs. I’m not clear on why you would like this. Usually if two pairs are chosen, it’s to bring the music to a separate location.

 

[Zdenek]

Hello everybody.

Apologies for the noob question.

I have recently bought a Marantz PM6007, and I'm using a pair of 4-Ohm B&W DM610. The sound is great to my ears.

Here's the question. I'm considering adding a pair of lower power speakers to output B just to add some ambience, but the manual says that, in order to have two pairs of speakers (one at output A, one at B), both sets must be 8-16 Ohms. A 4-Ohm pair of speakers should be the only one in the system (connected to A, nothing at B). Since I have the B&W's at output A, there's absolutely no way I could connect a 2nd pair of speakers to output B? What would be the consequences of attempting to do so?

Thanks, guys!
Vinícius

Hello, I would personally buy one more amplifier to power the bass section separately, this second amplifier must have an adjustable input signal and I recommend this amplifier https://stereo-magazine.com/review/nad-c-298-review
Zdenek

 

[Zdenek]

Hello everybody.

Apologies for the noob question.

I have recently bought a Marantz PM6007, and I'm using a pair of 4-Ohm B&W DM610. The sound is great to my ears.

Here's the question. I'm considering adding a pair of lower power speakers to output B just to add some ambience, but the manual says that, in order to have two pairs of speakers (one at output A, one at B), both sets must be 8-16 Ohms. A 4-Ohm pair of speakers should be the only one in the system (connected to A, nothing at B). Since I have the B&W's at output A, there's absolutely no way I could connect a 2nd pair of speakers to output B? What would be the consequences of attempting to do so?

Thanks, guys!
Vinícius

Hello, I would personally buy one more amplifier to power the bass section separately, this second amplifier must have an adjustable input signal and I recommend this amplifier https://stereo-magazine.com/review/nad-c-298-review
Zdenek

 

[Zdenek]

Hello, I would personally buy one more amplifier to power the bass section separately, this second amplifier must have an adjustable input signal and I recommend this amplifier https://stereo-magazine.com/review/nad-c-298-review
Zdenek

Hello, it's good that you are satisfied. Zdenek