Exceeding Impedance Ratings (of a small amp)

[CCmachine]

I recently bought a small 40w amplifier, to make a small portable speaker:

http://www.kemo-electronic.com/bilder/m034/m034_350x244.jpg

Right now I'm powering it from 8 good rechargeable AAs, giving me 10-12v.

From my home surroundsound kit i took off the two back speakers I never use. Measured resistance with a multimeter is ~4.2Ω.

The amplifier is rated for 4 to 8 ohms on the amplified output. Would I damage the amplifier if i connected the speakers in parallel to the loudspeaker connectors (2.1Ω load) or am I better off connecting them in series (8.4Ω)?

 

[Gordy]

I take it you mean that they are two single drive units. I would say use them in series. Placing them in parallel might work, but is likely to load down the amp too much.