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post #1 of 9 (permalink) Old 05-25-2013, 05:16 PM Thread Starter
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280SEL

I have a radio question, I have a stock Becker Europa radio. My question is what ohm rating should that radio require? It's AM FM with only one speaker in the dash. I replaced the original with a 4 ohm speaker and it works but volume is low with it turned all the way up. Any ideas?

1970 Mercedes Benz 280SEL
VIN 10801912050616

1967 Mercedes 250SE
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post #2 of 9 (permalink) Old 05-25-2013, 06:41 PM
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Did it work before? Your radio probably needs rebuilt.
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post #3 of 9 (permalink) Old 05-29-2013, 08:25 PM
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These period radios have a low power amp ,most work best with small 4 Ohm speakers ,a speaker with a massive magnet assembly requires massive power too so is mismatched here though may be of correct impedance;other than that the output transistors are faulty in the unit
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post #4 of 9 (permalink) Old 05-30-2013, 06:12 AM Thread Starter
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Originally Posted by adler View Post
These period radios have a low power amp ,most work best with small 4 Ohm speakers ,a speaker with a massive magnet assembly requires massive power too so is mismatched here though may be of correct impedance;other than that the output transistors are faulty in the unit
Thanks for the replies, I guess its time to send it off to the Radioman

1970 Mercedes Benz 280SEL
VIN 10801912050616

1967 Mercedes 250SE
Parts Car
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post #5 of 9 (permalink) Old 05-30-2013, 11:52 AM
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Originally Posted by jman1151 View Post
I have a radio question, I have a stock Becker Europa radio. My question is what ohm rating should that radio require? It's AM FM with only one speaker in the dash. I replaced the original with a 4 ohm speaker and it works but volume is low with it turned all the way up. Any ideas?
Is the radio the same volume independent of where you have the volume knob? Or does it get from really quiet to quiet? If the volume control works then try an appropriate speaker. Low-power beckers work horribly with modern high-power speakers.

Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...
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post #6 of 9 (permalink) Old 05-30-2013, 12:22 PM Thread Starter
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Is the radio the same volume independent of where you have the volume knob? Or does it get from really quiet to quiet? If the volume control works then try an appropriate speaker. Low-power beckers work horribly with modern high-power speakers.
The volume control does work, and I do have a 4"X6" - 4 ohm speaker. On a scale of 0 -10 the volume only reaches maybe a 3 if you understand my analogy.

1970 Mercedes Benz 280SEL
VIN 10801912050616

1967 Mercedes 250SE
Parts Car
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post #7 of 9 (permalink) Old 05-30-2013, 12:25 PM
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The volume control does work, and I do have a 4"X6" - 4 ohm speaker. On a scale of 0 -10 the volume only reaches maybe a 3 if you understand my analogy.
Do you have another low-power speaker. Sometimes it can also be the speaker... Is this a radio with a separate amplifier? My experience with these radios says that you need a known-good radio to test speakers and known-good speakers to test radios and known-good amplifiers to test radios with separate amplifiers and known-good radios to test amplifiers for radios with separate amplifies. Also, a 4 x 6 4 ohm speaker may still not be an appropriate speaker for this situation.

Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...
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post #8 of 9 (permalink) Old 05-30-2013, 12:26 PM
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If you go to scrap yards, get a speaker out of the back doors of an early W124. Or out of a W123, but those are often trashed from the sun.

Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...
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post #9 of 9 (permalink) Old 05-30-2013, 12:31 PM Thread Starter
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The radio has no amp. The speaker is just a generic 4 ohm and I have tested it in my truck and it works well.

1970 Mercedes Benz 280SEL
VIN 10801912050616

1967 Mercedes 250SE
Parts Car
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