If you can do that, it's quite simple to wire it up. Not only will it allow you to play both amps at once but you can also switch between them. If you try connecting your amps, you are going to end up with fried amps. Bad Idea. Best not to overthink these things. I would sell the two amps and buy a bigger amp (costs money tho'). You can't just connect amps together unless you know what you are doing, or they were designed to be able to connect together. The device you need is common and it called an AB-Y switch. 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. It allows you to have more tonal control and complexity. Some pre's can give you all that you need. the only thing you can do is hook rcas from one amp to another if the amp has rca outputs on it. 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. Settings that you can achieve with two tone stages can't be accomplished with just one. 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. There are a number of good receivers and amplifiers that you can use if you still feel you need more power. To add to what CL400Peavey said, each amp has a tone stage that makes a contribution. Chaining two amps together does not combine their output wattage, if that's what you are asking. Two amps should be connected to two speakers. The "Line Out" on an amplifier is a high power output channel used to drive cabinets or individual speakers. you cannot hook up 2 amps together so please do not connect speaker wires from 2 amps to one sub. 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. this could and would be a disaster! Then connect your stereo pair of peakers to the second amplifier and your in business. You will damage possibly both amps if you do it. You can divide the input signal into both amps. 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 want amplifier to have as much signal to work with as possible. With extra speakers you can connect two receivers together and boost up the sound output of your entire system. 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). 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. 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. You should just go buy a new mono Class D amp. Careful with your expectations though. 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. 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