Loa sieu tram

Neu ban dang thuong thuc mot bo phim hanh dong hoac mot ban hoa tau Paul Mauriat tren dan home theatre ma khong hieu nhung tieng tram hung trang cua dan nhac, tieng dai bac ren vang xuat phat tu dau thi xin thua do chinh la "cong lao" cua chiec subwoofer (loa sieu tram) nho nhan.

Thanh phan khong the thieu trong dan home theatre.

Loa sieu tram la yeu to khong the thieu de hop thanh dan home theatre (goi nom na la rap hat tai gia). Neu ban nhin vao nhung quang cao loa voi ky hieu 2.1. 5.1. 7.1... thi so 1 le loi do chinh la ky hieu cua loa sieu tram (subwoofer). Co tan so cuc thap tu 20 den 200 Hz, day la noi xuat phat cua nhung tieng bass cuc thap. Co mot loa sieu tram trong dan cung co nghia la cac loa khac co the co kich thuoc nho nhan hon vi khong phai dam nhiem phan tieng bass.

Khong he co mot hinh dang that su ly tuong doi voi subwoofer. Tuy vao tri tuong tuong cua cac nha thiet ke cung nhu muc dich thuong mai cua cac hang ma subwoofer co the co nhieu hinh dang khac nhau. Hau het cac loa sieu tram deu co ampli cong suat lap san o trong de dieu chinh tieng bass. Nhung subwoofer re tien thi khong co ampli lap trong ma "muon" cua ampli chinh cua ca dan loa. Chinh vi vay am thanh se khong duoc nhu y khi ta khong the dieu chinh duoc tan so bass.

3 dang thiet ke cua subwoofer.

Tuy xuat hien duoi nhieu hinh dang khac nhau nhung ve co ban subwoofer co 3 dang thiet ke:

Lien hop: Loa tram duoc bo tri trong mot hop kin va chi co mot duong tieng ra ngoai.

Loa co lo: Neu ban de y thi se thay phan lon subwoofer co mot lo o phia duoi duong tieng. Thiet ke nay co tac dung giup loa choi duoc cac not thap hon va tao ra cam giac tram lan toa.

Loa dang ap: Cum tu day ve "ky bi" nay thuc ra mo ta thiet ke 2 loa sieu tram "dau dau" vao nhau trong mot thung loa. Cac song am va cham vao nhau trong mot khoang khong chat hep se cho ra tieng tram cuc manh.

Tieng tram lan truyen trong khong gian khong co dinh huong, vi vay theo Sohoa.net, ban co the bo tri loa subwoofer tai bat cu vi tri nao trong phong nghe.