sam_ Posted October 5, 2017 Share Posted October 5, 2017 Hi I have been running basic sound and lighting for an amateur theatre company.The problem is with the current system is the amp they are using does not output stereo.They have tasked me to find one which can output stereo. It needs to be in the powered mixer style as there is very little installation space.I think I have found one which is suitable the only issue being that: http://www.gear4music.com/PA-DJ-and-Lighting/SubZero-300W-Lightweight-Powered-Mixer-Head/SJ6 The 2 speakers are rated 100 Watt RMS/160 Watt Program and 8ohm each The amplifier has x2 (stereo) 100 Watt RMS and only 150 Peak and 8Ohm Would this be suitable for use or would I need something with more power (it is only used for sfx and quiet interval music) ThanksSam Link to comment Share on other sites More sharing options...
kgallen Posted October 5, 2017 Share Posted October 5, 2017 Hi Sam, Welcome to the Blue Room!The problem is with the current system is the amp they are using does not output stereo.Is there a reason they want stereo? For example do they want to do something fairly extreme with the stereo image like a sound effect from just left or right? Unlike listening to music at home, sat centrally placed in front of a pair of speakers, very few members of the audience actually sit in a position where they would receive an accurate stereo image of whatever is being played. Of course I'm being disingenuous because I usually use stereo material, but I'm just interested in their motivation and if they are really going to achieve what they think they are. Maybe your current equipment is thus serviceable and this "upgrade" is unnecessary? The 2 speakers are rated 100 Watt RMS/160 Watt Program and 8ohm eachThe amplifier has x2 (stereo) 100 Watt RMS and only 150 Peak and 8OhmThat's fine - the RMS figure is the useful one. I wouldn't be concerned about the "10 Watt" peak difference. With the amplifier you're quoting you're more likely to damage your speakers by driving the amp at full where it will almost certainly be distorting horrifically and driving a DC current into the speaker voice coils because of the clipping. Hope that helps (and I'm not about to get flamed!)Kevin Link to comment Share on other sites More sharing options...
Shez Posted October 5, 2017 Share Posted October 5, 2017 10W is neither here nor there. As a very general rule of thumb, it's good to aim for an amp with twice the power capability of the speakers, so in your case a 200W / channel amp to go with your 100W speakers. But for a few SFX and quiet music, it'll probably do the job just fine. (The mixer lacks some basic features that you might find useful such as being able to PFL (pre-fade listen - listen to something in headphones before making it live) but again, that may not be as issue for your usage). Link to comment Share on other sites More sharing options...
pete10uk Posted October 5, 2017 Share Posted October 5, 2017 Hello and welcome. As said in the previous replies, for your requirements this will be fine. If you were wanting it for a heavy use application like a disco or live music, then yes you should ideally have a larger amp. Some say double what the speakers say but I personally go for around 50% more. However the amp rating is quoted 4 ohm in the online spec and you say the speakers are 8 ohm which in effect lowers the power of the amp as it takes more to drive the speakers. But for your use it will be fine. Link to comment Share on other sites More sharing options...
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