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Discussion Starter · #1 ·
Hi,

I have an old integrated stereo amplifier with output power of of 100W x 2.
Please see the attached pictures of the back of the amplifier.

I have the following questions.

1. What is the meaning of the A or B and A + B specification in the first figure?

2. Does that mean that I can connect two 8 ohm speakers in series to the amplifier?

3. I currently have a JVC subwoofer with the following specifications - power handling capacity - 100W , impedance 10 ohm. I connect the speaker to the right speaker of channel A. The amplifier and the speaker work fine for a while then turns off - I am assuming it gets overheated. It starts again after a while. What is happening there?

Thanks.


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Hi,

I have an old integrated stereo amplifier with output power of of 100W x 2.
Please see the attached pictures of the back of the amplifier.

I have the following questions.

1. What is the meaning of the A or B and A + B specification in the first figure?

2. Does that mean that I can connect two 8 ohm speakers in series to the amplifier?

3. I currently have a JVC subwoofer with the following specifications - power handling capacity - 100W , impedance 10 ohm. I connect the speaker to the right speaker of channel A. The amplifier and the speaker work fine for a while then turns off - I am assuming it gets overheated. It starts again after a while. What is happening there?

Thanks.


To get the files : click on the link, it will take you to a new page, click 'Download this file' button, then enter the human verification code given there and then click 'Download Now'.

http://www.filedropper.com/img1749

http://www.filedropper.com/img1750




Hello,
You need to connect a single pair of Speakers to either A or B. While you can connect one pair to each as that is why the option is there, do not use A & B simultaneously. The connections should be one Speaker Cable to the Left and one to the Right using A or B, but not A & B.

The Subwoofer should be connected to the Subwoofer Preout on the back of the AVR. It should say Subwoofer and or LFE. The Subwoofer should have RCA's for this.
 

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Discussion Starter · #3 ·
Jungle Jack,

Thanks. I am still a bit confused.

The Subwoofer should be connected to the Subwoofer Preout on the back of the AVR. It should say Subwoofer and or LFE. The Subwoofer should have RCA's for this.
My subwoofer doesn't have a RCA connection. Just the typical two red and black slots.

Also, I have only one subwoofer and I that connect to the Right A. Could that be a problem?
 

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Hi,

I have an old integrated stereo amplifier with output power of of 100W x 2.
Please see the attached pictures of the back of the amplifier.

I have the following questions.

1. What is the meaning of the A or B and A + B specification in the first figure?

2. Does that mean that I can connect two 8 ohm speakers in series to the amplifier?

3. I currently have a JVC subwoofer with the following specifications - power handling capacity - 100W , impedance 10 ohm. I connect the speaker to the right speaker of channel A. The amplifier and the speaker work fine for a while then turns off - I am assuming it gets overheated. It starts again after a while. What is happening there?

Thanks.


To get the files : click on the link, it will take you to a new page, click 'Download this file' button, then enter the human verification code given there and then click 'Download Now'.

http://www.filedropper.com/img1749

http://www.filedropper.com/img1750




More important than the wattage, is how many OHMs is the speaker. A lot of amplifiers and receivers will shut off or burn out of the speaker impedance is too low. You can connect two 16 ohm speakers. 16 divided by 2 = 8 ohms. Two 8 ohm speakes would put a 4ohm load on the amp.

Edit After looking at your photo. It appears as if the combined impedance is below 8 ohms. So your receiver is shutting down. Better quality amplification can handle lower impendance levels. My suggestion is to get a dedicated subwoofer amp, Dayton makes a rather affordable unit. Better yet, spend some cash and get a separate powered sub which includes the amp. I would recommend searching (and waiting) on craigslist for a Paradigm PW-2200 (or PW-2100, version one or two); they are out of production and can be found cheaply for a few hundred dollars used. As a bonus, you will be blown away at the sound quality. I promise, its better than BOSE.
 

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I don't think I have seen any 16 ohm speakers in a very long time. If you wanted to run 2 pairs you would have to run at least 16 ohm speakers (per the specs shown)... Does anyone even make 16 ohm speakers anymore? You def do not want to run lower ohms than the amp is rated for. If you look at amp ratings you will see that the lower the impedance the more power the amp will put out. Years ago unscrupulous manufacturers would give power ratings on a single frequency to get their power ratings to appear to be higher.
 
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