Meaning of the sentence

[NguyenTrg]

Can you please tell me the meaning of this:
I asked the assistant which make of hi-fi he recommended
According to Oxford Dictionary :

[Our Tort System]

"make" here means "brand".

For example:
Can you tell me the make of the car that just passed us by?

The Oxford dictionary defines it as "the manufacturer or trade name of a product":
http://oxforddictionaries.com/view/entry/m_en_gb0493710#m_en_gb0493710
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[NguyenTrg]

Ah, I see. I mistook it and thought that "make of" is a phrasal verb. Understand now. Thank Tort.
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[Bookaholic_English]

There are some reasons showing that it is not a phrasal verb. First, if it were a verb we must use what instead of which. Second, if it were a verb we must turn make into makes. Third, it can't be a verb because make of never remains active when used, only make up can.
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Rolling stone gathers no moss.

[Khenry]

I asked the assistant which make of hi-fi (that) he recommended.

Another way to look at it as not verb is that the noun phrase ' which make of hi-fi he recommended' is placed in the direct object slot and the noun slot preceeding the adjective clause.

How about that?

[NguyenTrg]

Right, BE and Khenry. I got it now. I'll be careful next time :) . Thank you both.
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I'll be back. I'll miss you guys so much... See you soon...

[Bookaholic_English]

I don't think it's the direct object because it's the assistant that is the direct object.
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Rolling stone gathers no moss.