RosalieTheDog
Active Member
- Joined
- May 3, 2021
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Dear all
I recently swapped a Topping D70s for a Minidsp Flex as source for my 2.1 hifi system. The benefits of the Dirac room correction are definitely there. However, I'd like to understand better why the SPL seems lower at the listening position with similar attenuation at the volume control. There are of course many new variables, and I'm not even sure which ones matter. I've tried listing the variables of the system here:
Source : Wiim mini through optical or a TV through optical
Speakers : Buchardt S400 mkii (87 dB sensitivity)
Would anyone care to walk this neophyte through the gain structure? Which variables in this gear determine the output volume? Is the amp sufficiently powerful, or is it related to gain? I'm not looking for new gear, at least not in the near future, but just understanding a bit better what's going on.
Thanks in advance!
I recently swapped a Topping D70s for a Minidsp Flex as source for my 2.1 hifi system. The benefits of the Dirac room correction are definitely there. However, I'd like to understand better why the SPL seems lower at the listening position with similar attenuation at the volume control. There are of course many new variables, and I'm not even sure which ones matter. I've tried listing the variables of the system here:
Source : Wiim mini through optical or a TV through optical
- Wiim mini volume controle disabled
- The TV through optical requires much less attenuation to reach the same output level as the Wiim, but that is a whole other issue!
- DIRAC enabled. There is debate on how DIRAC in minidsp deals with headroom, some suggesting it applies -10 db attenuation. (See here and here on the Minidsp forums and here on audiosciencereview.) The Minidsp Device Console and DIRAC itself are very mysterious, and at any case don't show or communicate this.
- The 'max output level' on the balanced output (4Vrms) is different from the Topping D70s (5Vrms @ 0dBFS through XLR). Is this the main reason for the perceived difference?
Speakers : Buchardt S400 mkii (87 dB sensitivity)
Would anyone care to walk this neophyte through the gain structure? Which variables in this gear determine the output volume? Is the amp sufficiently powerful, or is it related to gain? I'm not looking for new gear, at least not in the near future, but just understanding a bit better what's going on.
Thanks in advance!