Импеданс селектор.
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Импеданс селектор.
На усилватела си отдзад има един превключвател на който пише импеданс селектор. Има две позиции. За колони от 4 ома и повече и другата позиция е за колкони 6 ома или повече. Мойте колони са 6 ома. ТОва означава че може импеданс селектора може да е и в двете положения. Някой може ли да каже за ккаво служи този импедан селектор и какво прави въобще и на на кой позиция е по добре да го сложа.
в отговор на Hиkи Kънчeв
#3
Re: Импеданс селектор.
а като допълнение ще кажа - по-висок импеданс по-малка изходна мощност и обратното. Ето защо не връзвай колони напр. 8 ома/40 вата към усилвателя на положение напр. 4 ома, щото може да ти изпушат колоните 
Re: Импеданс селектор.
Няма и да има разлика в силата на звука. Усилването не се променя. Ако селектора е на 4 ома захранващото напрежение е по-ниско. Това обаче не значи, че колоната ще изгори по-трудно. Ако издуеш усилвателя до дупка и ако той няма защита от насищане на крайните стъпала (премодулиране) мощността, отиваща към колоните ще стане прекалено голяма. Тогава може и да изгорят. Затова сложи си селектора на 6 ома и не злоупотребявай с волумето ;)
Re: Импеданс селектор.
Impedance Selector Switches
This so called feature, used by some manufacturers, is designed to prevent overheating of the receiver or damage to its output transistors because of excessive current flow. The manufacturer accomplishes this in one of 2 ways: 1) Stepping down rail voltage supplied to the power amp or 2) feeding half the signal strength to a voltage divider of power resistors. Both of these methods severely limit dynamics and current capability of the power amp. This results in an audible decrease in bass capability and dynamics transient sound because the 4 ohm setting effectively increases the receiver's output impedance. Unfortunately many manufacturers put these features on their products to ease customer concerns with driving low impedance loads and for safety reasons when getting UL approvals. Note: In order to meet UL requirements, a receiver cannot be rated down to 4 ohms without having this switch onboard. Receivers without this switch are usually rated down to 6 ohms. In most cases, well designed receivers can easily handle 4 ohm loads safely and efficiently. It is highly recommend to keep the impedance switch set to 8 ohms regardless of your speakers impedance and make sure your receiver has plenty of ventilation.
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This so called feature, used by some manufacturers, is designed to prevent overheating of the receiver or damage to its output transistors because of excessive current flow. The manufacturer accomplishes this in one of 2 ways: 1) Stepping down rail voltage supplied to the power amp or 2) feeding half the signal strength to a voltage divider of power resistors. Both of these methods severely limit dynamics and current capability of the power amp. This results in an audible decrease in bass capability and dynamics transient sound because the 4 ohm setting effectively increases the receiver's output impedance. Unfortunately many manufacturers put these features on their products to ease customer concerns with driving low impedance loads and for safety reasons when getting UL approvals. Note: In order to meet UL requirements, a receiver cannot be rated down to 4 ohms without having this switch onboard. Receivers without this switch are usually rated down to 6 ohms. In most cases, well designed receivers can easily handle 4 ohm loads safely and efficiently. It is highly recommend to keep the impedance switch set to 8 ohms regardless of your speakers impedance and make sure your receiver has plenty of ventilation.
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