Adcom question

[derek61]

Good evening. I'm running an Adcom GFA II Power amp and an Adcom GFP 555 preamp .is there a safe way to power two sets of speakers ? Current running Klipsch Hersey's .I just want to run something with a little more bass .. Thanks
..

 

[Doodski]

I'm guessing this is the amp you are using. The GFA-555 II.

 

[derek61]

I'm guessing this is the amp you are using. The GFA-555 II.

Yes that is the Amp

 

[derek61]

I left off the 555 !

 

[Doodski]

Yes, you can wire the 2 pair of speakers in a series configuration. You have lots of power available and the new Klipsch Heresy are rated for 8 Ohms.
It's that or get a 2nd amplifier for the 2nd pair of speakers.

 

[Chrispy]

Get sub(s) rather than duplicate channels with another pair of speakers ?

 

[derek61]

Yes, you can wire the 2 pair of speakers in a series configuration. You have lots of power available and the new Klipsch Heresy are rated for 8 Ohms.
It's that or get a 2nd amplifier for the 2nd pair of speakers.
View attachment 87961

So in series I would put the two positive wires together and the black wires together and hook them to the power amp?

 

[Grandzoltar]

Thats not what the diagram is showing the positive from amp speaker 1 positive then leaves speaker 1 negative to speaker 2 positive then speaker 2 negative goes back to the negative on the amp

 

[Doodski]

So in series I would put the two positive wires together and the black wires together and hook them to the power amp?

No, do not do it that way. Do it like the diagram shows. It's all there. This diagram is for one side at a time.

 

[Doodski]

and... you'll need a 1.5 volt battery to connect to the speakers to ensure they are in phase with each other. That is if they are different model of speakers. Powering the speaker with the battery should produce the same in/out response in each speaker.

 

[derek61]

No, do not do it that way. Do it like the diagram shows. It's all there. This diagram is for one side at a time.
View attachment 87973

Ok got it .Thank you so much for the information I really appreciate it!

 

[derek61]

and... you'll need a 1.5 volt battery to connect to the speakers to ensure they are in phase with each other. That is if they are different model of speakers. Powering the speaker with the battery should produce the same in/out response in each speaker.

Thank you

 

[Unclevanya]

and... you'll need a 1.5 volt battery to connect to the speakers to ensure they are in phase with each other. That is if they are different model of speakers. Powering the speaker with the battery should produce the same in/out response in each speaker.

? I understood the wiring and series resistance, I don't understand this.

 

[Haflermichi]

If you place 1.5 dc battery volts across the speaker terminals + to + and - to - the woofer cone will move outwards, emit a pop sound, and stay outwards as long as the battery is connected. You only need touch it on the terminals briefly to see the cone motion.

 

[DonH56]

I agree with @Chrispy -- instead of another pair of speakers, pick up a good sub or two to augment the bass. The Heresy was actually originally designed to be a center speaker for a three-channel "stereo" system IIRC.