The great altar — i.e., as we say, “the high altar,” the new Syrian one. So the high priest is sometimes called “the great priest” (kôhèn hâggâdôl), Ahaz orders that the daily national sacrifices, the royal offerings, and those of private individuals, shall all be offered at the new altar.
The morning burnt offering, and the evening meat offering. — Not that there was no meat offering in the morning, and no burnt offering in the evening. (See Exodus 29:38-42; Numbers 28:3-8.) The morning meat offering is implied in the mention of the burnt offering, because no burnt offering was offered without one (Numbers 7:87; Numbers 15:2-12). On the other hand, the evening meat offering was the only part of the evening sacrifice which the congregation could stay out, for the burnt offering had to burn all the night through (Leviticus 6:9).
The brasen altar. — The contrast seems to imply that the new altar was of a different material.
Shall be for me to enquire by — i.e., for consulting God. So Rashi. Others (as Keil): “I will think about what to do with it.” Perhaps it is simply, “It shall be for me to look at,” i.e., an ornamental duplicate of the other altar. (Comp. Psalms 27:4.) Grätz suggests “to draw near” (i.e., to sacrifice), transposing the last two letters of the verb, which does not suit the context; and Thenius would read, “to seek,” after the Syriac, which has “to ask” (i.e., to pray), as if the old altar of sacrifice were henceforth to be an altar of prayer. (?)