Matching Speaker Loads to Amplifiers

One 4-ohm speaker per channel = 
4 ohms total per channel
 
In stereo, this load works with:
CE, CH, CL, CP660, CTs, D, IT, K, MA, MT, Studio Ref, XLS, Xs
In bridge-mono, this load works with:
CE, CL, 
CTs600/1200/2000/3000,
IT, K, MA, MT, Xs
Two 4-ohm speakers in parallel per channel = 
2 ohms total per channel
 
In stereo, this load works with:
CE, CL,
CTs600/1200/2000/3000
IT, K, MA, MT, Xs
In bridge-mono, this load works with:
I-Tech
Four 4-ohm speakers in parallel per channel = 
1 ohm total per channel
 
In stereo, this load works with:
I-Tech.

All others not recommended -- may overheat.
In bridge-mono, this load works with:
None.

Not recommended -- may overheat.

One 8-ohm speaker per channel = 
8 ohms total per channel
 
In stereo, this load works with:
All Crown amplifiers. The same is true for a 16-ohm load.
In bridge-mono, this load works with:
All Crown amplifiers. The same is true for a 16-ohm load.
Two 8-ohm speakers in parallel per channel = 
4 ohms total per channel
 
In stereo, this load works with:
CE, CH, CL, CP660, CTs, D, IT, K, MA, MT, Studio Ref, XLS, Xs
In bridge-mono, this load works with:
CE, CL, 
CTs600/1200/2000/3000,
IT, K, MA, MT, Xs
Four 8-ohm speakers in parallel per channel = 
2 ohms total per channel
 
In stereo, this load works with:
CE, CL,
CTs600/1200/2000/3000
IT, K, MA, MT, Xs
In bridge-mono, this load works with:
I-Tech