Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
Norm
: I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
: Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
: Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
: In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
: Norm
:
: : I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
: : Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
: : Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
: : In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
: : Norm
: :
: : : I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
Norm,
As a related subject. I have a regen up and running. It uses a single dual triode (6SL7). Powersupply is the AES kit with extra caps to reduce AC hum. I usually listen using an amplified pair of computer speakers. It doesn't sound very good. The RS amplified speaker is worse. The set won't drive a modern speaker. I am sure the impedence is way off. Should I get an audio output transformer?? If so what kind?? Would another stage of amplification be in order??
: Hi Sven
: Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
: Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
: In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
: Norm
:
: : I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
: Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
: Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
: In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
: Norm
:
: : I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
if we need to add an resistor what should it be. If i don't will I just not get the volume from my speakers that I normally would?
: Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
: Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
: In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
: Norm
:
: : I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
if we need to add an resistor what should it be. If i don't will I just not get the volume from my speakers that I normally would?
: Others may disagree but I suggest connecting the 4 ohm speaker directly without a resistor. The mismatch will reduce available power from the amp but won't effect normal listening..
: Never operate an amp without a load. Always have a speaker or resistor on the output. Without a load there will be peak voltages which can destroy output transistors and caps.
: In old radios low impedance would be considered 4-8 ohms, high 2000-5000 ohms. Here it will make a difference and requires a matching transformer.
: Norm
:
: : I'm replacing a speaker in a radio that originally used an 8 ohm speaker. The replacement is a 4 ohm speaker (it was the only one I could find in that size). Do I need to put a resistor in series with the speaker in order to crank it up to 8 ohms or higher? I've read that you should never connect low impedance speakers to high impedance amps without some sort of resistor in series.
THANKS