4or 8 or 16 ohms when you have 2 pairs of he same speaker

[62caddy]

Wiring in series means that a crossover network is inserted between one of speaker leads and the amplifier which definitely cannot be helpful. Might be okay in applications where SQ is less critical otherwise parallel is far preferable.

Far more equipment with multiple pairs of speaker outputs is designed for parallel operation than for series. Many of these recommend 8 ohm minimum when two pairs are used. This is not the situation with the OP's Crown which can run twice the load.

 

[SaturationPt]

Wiring in series means that a crossover network is inserted between one of speaker leads and the amplifier which definitely cannot be helpful. <<snip>>

Wiring in series does not mean that a crossover is added. Further, if you wire speakers in series, and add a crossover in series, the crossover affects both speakers in this series arrangement.

Did you mean parallel? It is somewhat common to do so in a parallel arrangement, which is how speakers are constructed internally.

 

[bowtie427ss]

There is an ideal load for every amplifier based on the amplifier's output impedance more than any other single factor.

There are many amplifier manufacturers that don't give a spec for output impedance, you might ask yourself why.

Low impedance loads will be best mated to amplifiers with very low output impedance.

 

[62caddy]

Wiring in series does not mean that a crossover is added. Further, if you wire speakers in series, and add a crossover in series, the crossover affects both speakers in this series arrangement.

Did you mean parallel? It is somewhat common to do so in a parallel arrangement, which is how speakers are constructed internally.

In series, one leg of the speaker's leads is running through the crossover of the other speaker.

 

[bowtie427ss]

Wiring in series does not mean that a crossover is added

If you are wiring speaker systems with onboard passive crossovers in series, you most certainly have connected parts of the crossovers in series as well. Of course, there are huge variations between speaker system designs.

 

[SaturationPt]

In series, one leg of the speaker's leads is running through the crossover of the other speaker.

I understand what you're saying, very good point.

Some speakers have the woofers wired directly (ex: many/most vintage JBLs) but most modern (quality) speakers do have a crossover network in series for all drivers.

 

[Bob]

tried this years ago. the doubling up lowers (somewhat) the bass frequencies. the damping
factors change depending on series or parallel connection.

try stacking and mirror imagining (left channel rotated 90 degrees clockwise from vertical,
right channel rotated 90 degrees counter-clockwise) and lifted off the ground. try bi-wire
and/or single cable out to speakers.

I went with bi-amping afterwards.