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Post by MusicHead on Sept 13, 2020 19:00:22 GMT -5
Keep the switch in the 6-16 Ohm position. The 4 Ohm setting is there only to cover the manufacturer rear end with UL and similar regulations.
If you set the amp to 4 Ohm the protections will be too aggressive and limit the current going to the speakers.
How well the amp is designed (especially the power supply) will determine how much you can push it with 4 Ohm speakers as you LCR setup.
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Post by MusicHead on Sept 13, 2020 19:15:58 GMT -5
I found this old article: www.audioholics.com/amplifier-reviews/integra-dta-70.1-thx-flAssuming the amp is still holding well (in particular the capacitors), you should not have issues in driving 4 Ohm speakers to reasonably loud levels. Just do not set the switch to 4 Ohm, as counterintuitive as that may sound (pardon the pun!) 😁 |
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Post by 405x5 on Sept 13, 2020 19:29:19 GMT -5
Hope someone can help me out. I have a nine channel amp Integra DTA 70.1 which I am using with my XMC2. I'm doing 16 channels altogether and I also have the BASX A700 seven channel amp. Here's the situation all my speakers used to be 8 ohm impedence till I recently got Emotiva Airmotiv T Zero+ and the C2+ center which is 4ohm. I have the 4ohm speakers hooked up to the DTA 70.1 but I also have six other Definitive 8ohm speakers connected to the same amp. There's an impedence switch on back of amp with only two settings one is for 4ohm and the other is for 6-16ohm. Right now I have it set to the 6-16 ohm setting. What I need to know is am I doing anything wrong? The amp in question is the Onkyo Integra DTA 70.1. Please let me know what options I have. Thanks for any help. The front mains and center channel should be the channels that demand the most output from the amplifier, regardless of how many additional channels are being utilized. I would use the impedance setting that matches most closely, those three. Bill |
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Post by vcautokid on Sept 13, 2020 22:01:30 GMT -5
MusicHead is correct. Under no circumstances ever move that switch to 4 ohm setting unless you want your amplifier to perform worse. Gene D. from Audioholics has been saying and proving this for some time.
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Post by 405x5 on Sept 14, 2020 7:32:13 GMT -5
SPEAKERIMPEDANCEswitch
Use this switch to select the speaker impedance.
4Ω: Select if the impedance of any speaker is
4 ohms or more but less than 6.
6Ω: Select if the impedances of all speakers are
between 6 and 16 ohms.
.....Just sayin.....from the Integra owner manual.
Note they are saying select “4” if ANY of those connected speakers are 4ohm which supports what I was saying regarding load factor.
A call in to the manufacturer wouldn’t be a bad idea.
Bill
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Post by MusicHead on Sept 14, 2020 10:15:36 GMT -5
SPEAKERIMPEDANCEswitch Use this switch to select the speaker impedance. 4Ω: Select if the impedance of any speaker is 4 ohms or more but less than 6. 6Ω: Select if the impedances of all speakers are between 6 and 16 ohms. .....Just sayin.....from the Integra owner manual. Note they are saying select “4” if ANY of those connected speakers are 4ohm which supports what I was saying regarding load factor. A call in to the manufacturer wouldn’t be a bad idea. Bill The output impedance of a solid state power amplifier is supposed to be as close as possible to zero (ideal voltage source). No matter what a manufacturer may say ( to make their attorneys happy), there is still no valid technical reason to set that switch to 4 Ohm. |
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Post by monkumonku on Sept 14, 2020 10:30:40 GMT -5
Before I found Emotiva, I used Onkyo AVR's. They had the 4/8 ohm switch and I left it at 8 ohms. I had 4 ohm speakers but still left it at 8 and everything was fine.
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Post by mountain on Sept 14, 2020 11:52:03 GMT -5
If I remember correctly, my Yamaha rx-v 2400 had an 8 and 4 Ohm setting. I left it at 8 Ohm for several years because of a recommendation by a Well known reviewer. I finally switched to the lower ohm setting and my def tech 2000’s did sound better to my ears. I do remember dissing myself for not trying that earlier.
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Post by monkumonku on Sept 14, 2020 12:24:43 GMT -5
Now I'm confused. Some say leave the switch at 6-8ohm and some say set it to 4ohm. Now I'm regretting getting this amp. I should have just stuck with DefTechs 8ohm speakers. Hope to see more input on this subject. Thanks to everyone for your input I'm sure I can learn a lot from this forum. Stay safe everyone. I think you are making a mountain out of a molehill. What you should do is try the amp on both settings, then choose the one that sounds better. If they both sound the same, then flip a coin.  Let your ears tell you what to do. |
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DYohn
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Posts: 18,494
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Post by DYohn on Sept 14, 2020 12:48:56 GMT -5
Why so many speakers? Are they each on their own amplifier channel? If so then don't sweat it. If not then you may have issues.
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Let your ears tell you what to do.
