zingo Posted June 4, 2014 Share Posted June 4, 2014 I have been looking for a great 2-channel amp for a while, and tried a number of offerings, but finally found one that made me do a double take because I could get it at a good price. It has everything I've been looking for (high current, 2 ohm stable, high power, auto-on trigger, tested design, XLR inputs, good reviews) and seems like a great pairing with my speakers, but it has 7 channels! If this was the exact same amp only stereo, I would have no hesitation, but I feel weird having unused amp channels. Wouldn't that mean more power supply available for the two used channels? Anyway, it's a Sunfire TGA-7400, and I'm having a bugger of a time figuring out if I want to try it on my stereo, 4 ohm Jamo speakers... 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted June 4, 2014 Share Posted June 4, 2014 Sunfire has a pretty good reputation around here. I would not hesitate to try them. Other's will probably chime in. Good fortune 1 Quote Link to comment Share on other sites More sharing options...
Cal Blacksmith Posted June 4, 2014 Share Posted June 4, 2014 Don't think of it as un used channels, think of it as more power in the power supply for the channels you DO use 2 Quote Link to comment Share on other sites More sharing options...
willland Posted June 4, 2014 Share Posted June 4, 2014 Zingo, If it is affordible to you, get it and give it a shot. If it isn't what you were hoping and you were able to get a good deal, sell it for some profit and put that towards the amp you want. Bill Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted June 4, 2014 Share Posted June 4, 2014 Bridge the channels for more power if it has the capability. The 2ohm rating is only for short durations not continuous. It has special outputs for tube like sound quality. It is a beast at 400W x 7 - Wow! I thought my Sherbourn was a monster with 300W x7 @ 4Ohms. Only very few amps out there that can handle a steady 2Ohm load. I use an OSD Audio 2 channel amp for my front effects that can handle it. My DBX BX-1's were capable of 1Ohm loads. Quote Link to comment Share on other sites More sharing options...
moray james Posted June 4, 2014 Share Posted June 4, 2014 don't bridge you don't need more power and a lot of amps can sound poor when they are bridged though I imagine the amp in question is fine in bridged mode. Rather use the extra channels to bi amp your speakers. That will by you much better quality of sound than bridging will. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted June 4, 2014 Share Posted June 4, 2014 If you need more that 400 watts per channel, you are definetly not using Klipsch speakers, lol. 1 Quote Link to comment Share on other sites More sharing options...
zingo Posted June 4, 2014 Author Share Posted June 4, 2014 Thanks ya'll! I will give it a try, and see how those two channels sound on my Jamo speakers. (I know they are not Klipsch, but owned under the same group... ) The speakers aren't bi-wireable unfortunately as the two sets of inputs are for freestanding and wall placement; two different crossovers. However, that power should allow enough headroom anyway; 800w RMS at 4ohm nominal impedance. 1 Quote Link to comment Share on other sites More sharing options...
Dr Morbius Posted June 4, 2014 Share Posted June 4, 2014 "If you need more that 400 watts per channel, you are definetly not using Klipsch speakers, lol." You took those words right out of my mouth! Quote Link to comment Share on other sites More sharing options...
wvu80 Posted June 4, 2014 Share Posted June 4, 2014 If you need more that 400 watts per channel, you are definetly not using Klipsch speakers, I think Mr. Zingo has his new signature quote. Quote Link to comment Share on other sites More sharing options...
moray james Posted June 4, 2014 Share Posted June 4, 2014 Two different crossovers for different placement that is interesting and useful but since you are paying for two that meand both are half the quality that one good one would be so it is a "that's good, no that's bad" situation. I would suggest that once you know which network you will be using for the long run then disconnect the other from your speaker if that is not the case to begin with. You do not want a secondary network hanging off your speakers. If the second network is totally disengaged then no worries. Best regards Moray James. I would also suggest that you install shorting plug into the unused inputs as this will reduce noise in your amp. Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted June 4, 2014 Moderators Share Posted June 4, 2014 I know they are not Klipsch, but owned under the same group... I have only had a chance to hear one pair of Jamo speakers, I don't remember which ones, they were small bookshelf size and they were VERY impressive. Quote Link to comment Share on other sites More sharing options...
zingo Posted June 5, 2014 Author Share Posted June 5, 2014 Good thought about the crossovers, and I'll have see how they're wired as I've only had them wall mounted; 50lbs each and with french cleats no less! All of the drivers are Vifa, seem to be very high quality, and they do sound great! Quote Link to comment Share on other sites More sharing options...
zingo Posted July 26, 2014 Author Share Posted July 26, 2014 I finally pulled the speakers off the walls today to look at the crossovers, and I forgot how large they are! I loose perspective with them hanging on the wall, but pulling them off the french cleats was a quick reminder. The crossovers are actually very well done, in that the freestanding input houses most of the crossover, and the wall mount input only adds two caps to raise the rolloff point of the speaker. Add to that the tweeter, mid woofers, and bass woofers are all isolated from eachother, and the Made In Denmark sticker must be real. Quote Link to comment Share on other sites More sharing options...
zingo Posted July 26, 2014 Author Share Posted July 26, 2014 Hmmm... Some how I uploaded the picture sideways... The speakers do sound great powered by the Sunfire with the Parasound P3 in front of it. I haven't run out of power yet, even with powering the subwoofer as well. Quote Link to comment Share on other sites More sharing options...
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