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6 ohm and 8 ohm speakers

I just bought a Pioneer SA9100 amp and was reading the owners manual instructions for hooking up the speakers. I presently own two pair of Pioneer CS901 rated at 8 ohms. I was contemplating buying a pair of JBL Studio 530 rated at 6 ohms to pair up with the 901s on this amp. The manual states that if you are going to connect two pair of speakers, they must all be 8 ohms. I dont want to damage the amp or blow the speakers, especially my Pioneers. Can someone please help? Should I choose a different speaker than the Studio 530? And can anyone make a suggestion on a high quality bookshelf speaker? I also have a pair of B&W CM6. They were quite expensive ($2000 a pair) and the Studio 530 got good ratings. I have the B&Ws paired with a second set of Pioneer CS 901s powered by an Onkyo amp. Thanks alot Linda



Re: 6 ohm and 8 ohm speakers

I don't understand "in series". Do I put the wires from Pioneers and JBLS (all four speakers) into just the A space? So I would have four silver wires in the L space and 4 copper colored wires in the R space on the A space on the amp? Please be very specific on where I should put what... Thanks!!!

I have my B & Ws connected to C on my Onkyo and the Pioneers connected to A on the Onkyo and I play the both together A + B. They are all 8 ohms each. Is this bad for my Onkyo???? My brother bought that amp for me when he was in the Navy and he died in a fire at age 30, so the amp is very precious to me. If so, how should I connect them? Sorry, I am a doctor but I am electronically challenged..LOL. Linda

krokkor's picture

Re: 6 ohm and 8 ohm speakers

Hi Linda,

series connection is the same used in batteries devices; this means to connect positive and negative of two different devices together and after using the unused wires as positive and negative connection of the group. The image you can find at the following link can solve all your doubt:

http://it.tinypic.com/m/jb1hdl/4

In the image you can see your system and his wiring for a series connection of the two different speakers in a single group operation (in the image Group A but you can connect this speakers group also to a different group letter).
The drawing shows "RED" and "Black" wires but if you use Copper and Silver wires check which is the connection on the speaker; usually copper is used as positive (RED speaker's connector) and silver as negative (Black speaker's connector).
Don't connect the Copper and silver wires together and put inside the A amp's group connectors 'cause this means to connect in parallel operation mode.

You're a doctor: you can do it on your head.....

Cheers

Krokkor

krokkor's picture

Re: 6 ohm and 8 ohm speakers

Hello,

if you download the Service manual of this amp (available on this site) you can read in the Tech Spec pages (Page 17) that this Amplifier can accept, as output impedance, a range from 4 to 16 ohms as total sum of the speakers connected to the group A,B,C or A+B or A+C.
This means that you can connect both the CS901 and the JBLs 530 just in series on a single group (A or B or C); this way the total group impedance will reach 12 ohms and you can use both the speakers model at the same time.
In case you want to use the different speakers one at the time (just the CS901 or just the JBLs 530) you can connect them on two different output's group (A and B or A and C) but it is inadvisable to select the groups joint (A+B or A+C) from the speakers front selector 'cause the total impedance (parallel) will be reduced to 3,4 Ohm, in order to avoid extra current in the end power stage.

Cheers

Krokkor