Aleksandar R.
Sponsor: RAAL 1995
The 32 Ohm version comes as standard, and by order we can make 16 or 8 Ohms.Are you planning to produce that interface/stand only with TI-1b on board or also with TI-1c?
The new RCD Interface will not come with two selectable impedances, but only one, whichever someone wishes to choose.
The reasons for a single impedance on offer are that we're not chasing power so much any more and compatibility with all decent headphone amps.
Here's the comparison to SR's, driven by 32 RCD Interface, on SAEQ Hyperion Ge:
For the same perceived broadband SPL as SR's (with OB Compensation):
In dB:
CA's with Coffee Bean pads needs 1 click down (-2dB)
Magna needs 2 clicks down (-4dB)
Immanis needs 3 clicks down (-6dB).
In terms of power percentage (if SR's use 100% of power):
in % of power:
CA's need 63%
Magna needs 40%
Immanis needs 25%
In Watts, if the SR's needed, say...6W, for the same perceived broadband SPL:
In Watts:
CA's need 3.8W
Magna needs 2.4W
Immanis needs 1.5 W
Basically, if you have a SET amp of 6W at 8 Ohms, it will produce 1.5W at 32 ohms and Immanis will give you the same SPL as SR's with TI-1c at 8 Ohm input.
However, having 32 Ohms will be compatible to any decent headphone amp out there and 8 Ohms will not.
If we're talking 6-ish Watt SET amps, the new and upcoming Auris Audio Headonia 10th Anniversary 300B has output transformers that provide full power at 25, 50, 100, 150, 300 and 600 Ohms. There are transformer outputs for each of those load impedances, not one-winding-for-all, so full power is available at any impedance, and no problem there.
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