Interesting, Art. Thanks. I'm a retired ME, so your closer to the problem!

I guess you'd have to add the complex impedance for each frequency. Should be a good load for the amp, though.

Charlie

ArthurDaniels wrote: With the series connection to the Sevens and SuperSats, their loudness levels are a bit less than the Ones' loudness.

Art, it just occurred to me that this series hookup creates a voltage divider. So, your driving voltage to each speaker is roughly half of the amp output voltage. That would make the two speakers run about 6 dB lower, I think. Explains why they sound lower.

The other thing interesting about this setup is the amp effective output impedance; each speaker sees an equivalent amp output impedance that is the sum of the amp's plus the other speaker. Makes my head spin thinking about it.

Charlie

Hi Charlie,

I am awaiting further comments from Cambridge regarding net impedance of this arrangement and whatever else they wish to offer.

I will post their comments when I have them.

Art

Have not yet heard from Cambridge - expect to hear next week? However, after listening, I have decided that I don't like the reduced sound levels provided by the Series connection of my Triton Sevens and SuperSat 3Cs. So, I am trying yet another combination approach:

Triton Ones (Fronts) and Triton Sevens (Rears) connected in parallel to "Speaker A" terminals.

SuperSat 3Cs (Upper Middle Sides) connected to "Speaker B" terminals.

Theory here is that Ones and Sevens combine for a 4-ohm load at "A". 3Cs present an 8 ohm load at "B". Assuming essentially the same efficiency for all speakers, then the plan is to have Ones and Sevens present a lower impedance load which would result in a slight increase in listening volume. 3Cs presenting an 8-ohm load will play at a slightly reduced volume level, but are physically closer to PLP: Net balance will be good for all 3 speaker sets.

Not yet sure what net impedance is - hope that Cambridge comments will clarify calculation approach.

First impressions are favorable, but more critical listening needed.

I'm having fun.

Art

ArthurDaniels wrote: Theory here is that Ones and Sevens combine for a 4-ohm load at "A". 3Cs present an 8 ohm load at "B".

Not yet sure what net impedance is - hope that Cambridge comments will clarify calculation approach.

I see what you are up to, but keep in mind that the T1s have a minimum impedance of around 3 ohms, and IF the 3Cs have a similar dip in the same frequency range, then your net impedance is going to be closer to -- gasp -- 1.5 ohms.

Calculation of the net load impedance over the entire frequency range would require knowledge of the complex impedance over frequency of each speaker. Those plots at Soundstage would allow you to do that if you want to go through the hassle. It would be an interesting exercise.

Charlie

Hi Charlie,

Yes, it would probably be an interesting exercise to work on determining the net load impedance, but I confess that I am not enough interested in learning the results to pursue the matter further. I still hope to receive some additional insight from Cambridge, but have not yet heard from them.

However, I believe that I have achieved my listening objectives with my current arrangement. The parallel combination of my Ones and Sevens at Speaker "A" terminals and the connection of my 3Cs to the Speaker "B" terminals produces the effect of a room full of music, while still maintaining the sense of having the performers in front of me. I don't notice the 3Cs on the sides or the Sevens in the rear, unless I remove them from the setup. I have a number of hours of listening time now, spread over a variety of music types. No audible issues with this arrangement and the Cambridge Amp.

Happy Listening!

Art