how much are IOTA owners spending on RCA connects?
I am thinking of adding the IOTA to my system at the moment
Has anyone a mixed setup of different branded amps, e.g. IOTA and Emotiva, with good results?
It will, if it comes to pass, indeed be for my parlour system. Though in truth I would have to find a dealer, or maybe Iota themselves, who would allow me to audition it in my parlour before purchase, to see if it really makes a difference to my system. At present, I am using in the parlour a Denon AVR 4810 receiver, which does faux 11-channel processing (7.1, plus front height speakers plus front wide speakers using Audyssey) with the addition of a separate stereo amplifier (which I don't have enough characters in my signature here to show!). You see, sometime before the end of this year I will be installing my new 9-channel Denon AVR-X7200WA receiver, the main reason for its acquisition being genuine, rather than faux at present, 7.1.4 Atmos processing, and also 11-channel DTX. So I'll be using the X7200WA with my current stereo amplifier. The question then will be if that arrangement could be improved upon by using the IOTA for the flat 7.1 channels, and using four of the Denon's nine channels for the Atmos speakers. I will be able to decide if the IOTA gives a worthwhile (namely, £1,000) improvement only then, if a kind dealer can lend me an AVXP1 to try!
Thanks for the excellent analysis. The speakers are a pair of monitor audio MR6 rated at 150W/CH and according to the manufacturer, can go down to about 33HZ. Despite this I set the crossover to 80HZ ( which is nothing for these speakers ) at the receiver end so any amplification that takes place is 80HZ and above.Bi amping is a thorny subject and there's generally no single right answer.
Assuming you're passive bi-amping and using the crossovers in the speakers, the gain should be very slight if at all. You're essentially using a channel to amplify the full range signal, a large proportion of which is then discarded at the crossover stage (everything above the crossover on the LF terminals and everything below the crossover at the HF terminals).
So the amp now has to amplify four full range channels instead of two, meaning that it's working harder and potentially increasing distortion. You're also still limited by the maximum power of the transformer and so you'll potentially run into headroom problems now that you're spreading the same load across four channels instead of two.
If your speakers are high sensitivity or you're close to them (so you don't need much power and will have headroom) AND your crossovers are placed such that the power required to amplify the portion above isn't the same as the power required to amplify the portion below then you might get a marginal benefit from passive bi-amping.
Or if you're active bi-amping with a crossover before the amp then that should give a good improvement, you're only asking the amp to amplify a proportion of the signal. But doing that relies on you removing the crossover from the speakers otherwise you can get some really weird effects.
Thanks for the excellent analysis. The speakers are a pair of monitor audio MR6 rated at 150W/CH and according to the manufacturer, can go down to about 33HZ. Despite this I set the crossover to 80HZ ( which is nothing for these speakers ) at the receiver end so any amplification that takes place is 80HZ and above.
When I had it bi-amped with the internal amp of my RXA 3060 rated at 150W x 2 into 8ohms I definitely heard a difference. The front stage sounded more open and spacious, with lots of headroom vs before, plus it was noticeably louder and the dynamic range also seemed a tad more aggressive.
My thinking is if the internal amps of an AVR could have made such a difference, imagine what bi-amping from a dedicated power amp could do? I was just wondering whether 250W from one amp into one speaker will sound better than 110W x 2 bi-amped into the same speaker?