From a Klaf
37. There is an advantage to the laining itself when it is done from a klaf. Thus, when there is a klaf, it is best for the baal korei to be motzi everyone; the tzibbur should be quiet and not read along with the baal korei. By being yotzei with the baal korei, they have the advantage of laining from a klaf (הגר''א מעשה רב הובא במ''ב סקי''א).
38. However, if saying the words quietly with the baal korei will help someone have kavana, it is better for him to say each word quietly with the baal korei. He is still yotzei his chiyuv through the baal korei (מ''ב סי' קמ''ו סקט''ו, מ''ב סי' רפ''ה סקי''ד).
From a Printed Sefer
39. When the haftara is lained from a printed Haftara sefer (above, 30-31), one should listen to the baal korei lain the haftara since there is also value in laining from such a sefer. However, it is proper l’chatchila to quietly say each word along with the baal korei (מג''א הובא במ''ב סקי'''א).
From a Printed Chumash
40. Each person separately. Based on the Arizal, each person should read the haftara to himself from a chumash and only listen to the baal korei say the brachos out loud (כתבי האר''י פע''ח פי''ט, הוזכר במג''א סק''ה); this is the minhag of Chassidim (שו''ת מנחת יצחק ח''ג סי' י''ב). This also has a halachic advantage: if one says the words himself and is not yotzei with the baal korei, there is no problem of saying Torah Shebichsav by heart. They also try and justify how this is considered laining b’tzibbur (שו''ת חת''ס או''ח סי' ס''ח).
41. There are communities which lain the haftara from a printed chumash, but one person still lains out loud. The advantage of this is that each word is said, and it is easier to understand and focus on the content of the pesukim – particularly significant according to the reason of learning the Nevi’im (above, 4). This also better fulfills laining b’tzibbur since everyone listens to the baal korei. Nevertheless, it is best for each person to say the words quietly along with the baal korei, as mentioned above (38), to avoid concerns of saying Torah Shebichsav by heart,
