Careful with your expectations though. You want amplifier to have as much signal to work with as possible. The device you need is common and it called an AB-Y switch. There are a number of good receivers and amplifiers that you can use if you still feel you need more power. The reason is so TV noise figure can be ignored - only NF of preamp is important. Chaining two amps together does not combine their output wattage, if that's what you are asking. Your subs have little or no impact on power requirements because typically, if you have a home-theater setup, the sub is connected to the pre-out subwoofer connection (because the sub has its own built-in amplifier). Many guys plug their axe into one amp input then plug another guitar cable into the second input and the other end into the imput of the second amp. Some pre's can give you all that you need. If you try connecting your amps, you are going to end up with fried amps. It allows you to have more tonal control and complexity. the only thing you can do is hook rcas from one amp to another if the amp has rca outputs on it. You should just go buy a new mono Class D amp. Two amps should be connected to two speakers. how can i connect my two yamaha receiver,s together, playing same stream same time as the control amp, my reason, i wish to gain more sub control, using second amp. Best not to overthink these things. Not only will it allow you to play both amps at once but you can also switch between them. 2) Amplifier gain should be such that after factoring in cable, connector and splitter loss signal delivered to TV is about 10 dB higher then at antenna terminals. Get a set of interconnects, hook them to the zone 2 pre-outs on the Yamaha and run the other into to the amplifier in connections. You can connect an amplifier to each output from a splitter to boost the signal to each of the corresponding TV sets connected to the splitter. The "Line Out" on an amplifier is a high power output channel used to drive cabinets or individual speakers. I have found that if I connect a ground wire directly to a junction box on that circuit to a known good ground wire on a newer circuit, that the 'hot' reading from the inductance tester goes away on all the grounds and fixture boxes, etc, on the old circuit. With extra speakers you can connect two receivers together and boost up the sound output of your entire system. You can divide the input signal into both amps. Then connect your stereo pair of peakers to the second amplifier and your in business. Problems with Multiple Amps The TV signal amplifier will boost the TV signal to each of your TVs, but will also increase the noise on your line if the signal is amplified too much. this could and would be a disaster! The best you can do is play your signal through two rigs at once, which can be accomplished several ways, but unless you have a specific sound you are looking for (like the Rick-o-Sound feeding the bridge pickup to a guitar amp), it's rarely worth the hassle. To add to what CL400Peavey said, each amp has a tone stage that makes a contribution. Hi folks, I am trying to diagnose a problem where there is a charge on the ground of outlets on a circuit picked up by an inductance tester. A home audio receiver allows you to listen to the radio, input sounds from external devices like an MP3 player and connect to other audio receivers like a cassette deck or record player. you cannot hook up 2 amps together so please do not connect speaker wires from 2 amps to one sub. You will damage possibly both amps if you do it. You can't just connect amps together unless you know what you are doing, or they were designed to be able to connect together. 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