Members tuchan Posted December 8, 2009 Members Share Posted December 8, 2009 I have a Rolls RM67 laying around for this sort of thing. Was a while back but it worked very well. http://www.directproaudio.com/product.cfm?directid=39108 Link to comment Share on other sites More sharing options...
Members karlw Posted December 15, 2009 Members Share Posted December 15, 2009 Good grief there's some bad info here...Combining 2 like dynamic mics with a Y cable is not a problem (for most practical applications anyway).Transformer combiners are not required as many dynamics (like 57's) have transformers inside them. Also, the voice coil and magnet of the capsule look just like a transformer anyway. There are some minor resonance and impedance curve effects that may alter the tone alittle bit, but pretty small stuff. You could use 150 ohm buildout resistors in the Y cable to eliminate most of this effect if it was that important. Phase/polarity makes no difference in this case when combining, you would NOT want to reverse the polarity of one mic because the signals are different, and in fact it would be a problem because of the bleed. This suggestion is a classic misunderstanding of basic principles.Summing a signal with a mixer or passively makes no difference with regard to phase or polarity. A mixer allows buffering of the signal and isolation between sources, higher load impedances, (make-up) gain, etc.Doesn't matter about the length of the cables, the signal moves at the speed of light. Remember the guy here a few years ago who said he (and his clients) could tell the difference between a 25' and 50' mic cable on arrival times? Craig snuffed him good after his a-hole side emerged when presented with the fact that signal travels through a mic cable at the speed of light and there is less than 0.00001 degrees of phase shift due to the extra 25' of cable. Of course we were all wrong in his mind, but often bull{censored}ters believe their own dung. Sheesh - no kidding. I'm glad to see you (and others) correcting some of the bad info here. You beat me to it. Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 15, 2009 Members Share Posted December 15, 2009 Sheesh - no kidding. I'm glad to see you (and others) correcting some of the bad info here. You beat me to it. Hi Karl - I see you are doing a 700MHz wireless applications seminar at NAMM this year w/ Don. I'll have to stop by if I'm not in meetings. Link to comment Share on other sites More sharing options...
Members karlw Posted December 15, 2009 Members Share Posted December 15, 2009 Yes - along with a Sennheiser guy and a Shure guy. Should be good! Link to comment Share on other sites More sharing options...
Members Blakemore Effects Posted December 15, 2009 Author Members Share Posted December 15, 2009 Glad to see my thread survived the huge crash. So, I'm still thinking about going with the simple Rolls mic combiner. I think it's like $45. Good idea? Bad idea? What's the consensus here? Link to comment Share on other sites More sharing options...
Members RoadRanger Posted December 15, 2009 Members Share Posted December 15, 2009 I have one of these, works OK:http://www.bhphotovideo.com/bnh/controller/home?O=cart_accessories&A=details&Q=&sku=547632&is=REG Link to comment Share on other sites More sharing options...
Members Blakemore Effects Posted December 15, 2009 Author Members Share Posted December 15, 2009 I have one of these, works OK:http://www.bhphotovideo.com/bnh/controller/home?O=cart_accessories&A=details&Q=&sku=547632&is=REG Looks pretty cool. You say that it just works "OK" though? What about it do you think could be improved? Link to comment Share on other sites More sharing options...
Members RoadRanger Posted December 15, 2009 Members Share Posted December 15, 2009 Looks pretty cool. You say that it just works "OK" though? What about it do you think could be improved?A submixer is more versatile but for a passive combiner it seems to have everything you need . Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 15, 2009 Members Share Posted December 15, 2009 Why not a Y cable for your two mics? Link to comment Share on other sites More sharing options...
Members RoadRanger Posted December 15, 2009 Members Share Posted December 15, 2009 Why not a Y cable for your two mics?Too simple and doesn't cost enough? Link to comment Share on other sites More sharing options...
Members Blakemore Effects Posted December 15, 2009 Author Members Share Posted December 15, 2009 Why not a Y cable for your two mics? You know, I don't have a really good answer for that. A combiner is only going to cost me a little bit more, and I know you said that there is no harm done by using a Y-cable, but I just feel a bit more comfortable using a combiner. Sure, it may be irrational, and unnecessary, but if I feel more comfortable with it for whatever reason, those 15 extra dollars are well spent, right? haha Link to comment Share on other sites More sharing options...
Members flanc Posted December 16, 2009 Members Share Posted December 16, 2009 It looks like Mark's combiner is only $30 http://www.audiopile.net/products/Electronics/MCB-201/MCB-201_cutsheet.shtml Link to comment Share on other sites More sharing options...
Members Blakemore Effects Posted December 16, 2009 Author Members Share Posted December 16, 2009 I like this trend. Let's keep suggesting me new products that end up cheaper. If we keep this up, another 6 posts, and I'll get one for free. Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted December 16, 2009 CMS Author Share Posted December 16, 2009 Why not a Y cable for your two mics? Earlier, "before the crash" I suggested that relative volume control is a reason. If his on-stage levels (relative to each other) need to be adjusted, this affects what he sends to FOH and can't be changed without affecting his stage 'mix'. Amp/cab positioning could be causes for this issue to arise. Link to comment Share on other sites More sharing options...
Members Blakemore Effects Posted December 18, 2009 Author Members Share Posted December 18, 2009 Alright, so I realized that the mic combiner may not be the way to go. I may have to use two vastly different sized amps on stage (5 watt, and 15 watt amps), but I want the signal coming from the 5 watt amp to be way louder into the PA, but I'll need the 15 watter to be able to hear myself over the drummer. Sounds to me like I'll need a mixer of some sort. Is this even going to be possible to do this way? Run the 15 watt amp louder on stage so I have enough stage volume to be able to hear myself, but have the 5 watt amp louder through the PA since I love the tone, or is this just asking for trouble? If I need a mixer of some sort, would something like this be acceptable? http://pro-audio.musiciansfriend.com/product/ART-ProMIX-Mixer?sku=180626 Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted December 18, 2009 CMS Author Share Posted December 18, 2009 Yep, that's another version of the Rolls unit. Either should be fine. Yes, you should be able to have the lower-stage-volume amp be louder in the FOH. The limitations of feedback control will of course apply. Link to comment Share on other sites More sharing options...
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