Litman - choosing between single or double lumen?

[SiennaGreen]

I am just begining NS but am able to swing a good stethoscope up front. I am thinking it is between the Cardiology lll and the Master Classic ll. The Cardiiology has a double lumen and the MC ll has a single lumen. Practically speaking, what are the advantages and disadvantages (specifically for a mature, new nursing student) of the single versus double?

Thanks so much!!!

[K+MgSO4, BSN]

It is a single head with a floating diaphragm.

[Chris NS]

yea i am prob going to up to a master card after my LPN to RN