Thanks @Blumlein 88
for this topic.
I did my first listening test to decide if I should bi-amp my Salon2s with two extra channels.
Years before, I used the AVR to do the channels but decided against it because it introduces another variable.
I settled on this testing methodology:
- Y Split a single channel
- Use two amplifier channels and a single speaker (inspired by Harmon speaker testing)
- Remove the straps and create a 12" path cable and stacking banana plugs to allow quick swapping between 1 amp and 2
- Use an iPad to allow the user to select tracks and ask for channels to be switched
- Listen at listening levels in the low to mid 80 dB at a few feet from the speaker to limit room interaction
- Level matching is not required
- Switching is done out of sight by an person behind the speakers, takes a few seconds.
This was a single blind test with the 3 listeners.
I did not record the results or tries but it was about 3 sessions for each person, and all were reliably able to pick identify the differences.
All felt there was better clarity with the bi-amp option.
As a result, the Salon2s owner and I have decided to bi-amp the mains.
Is there a technical explanation, sure the load is changed on the amplifiers and the crossovers, that are physically isolated (to reduce interference) are now electrically isolated.
The power used was low given the listening levels.
Another controversial topic, where online arm-chair posters will flay you.
This is a simple inexpensive test at home. Costs you maybe some cable, connectors and time.
Then, decide for yourself.
This proves nothing from a scientific perspective, but that was not the purpose.
It comes back to the question, what experiments can be done at home to aid in buying decisions?
This was one of those.