Amp colorings;
A lil subtly hazy (in a positive holographic manner), gives some slammy midbass copium, is forgiving to the shrill of crisp transient DACs (like the DC2).
Gain Switch:
High GAIN,
Sounds less forgiving by a step. I mostly hear it in vocals. Not sure how to describe it.
High gain has more of a etch, that can compensate for details missing in your DACs presentation.
Low Gain,
Is more forgiving and further reduces the shrill/crisp nature of a DAC. Low gain does not have less slam than high gain. The low gain can slam just as hard on my dx300 or DC2 chains. It's just a matter of how forgiving you want the presentation to be.
Only time I found high gain was needed for slam was for an outlier headphone I have on hand my lcd-xc. But that is a quirky headphone.
With Dangerous convert 2 Dac & my DX300 Amp12 dap (Cirrus Logic DAC) , Piety's low gain works out better in synergy.
With my AKM & ESS stuff & other dongle's aroind, the high gain gives better synergy. They need more help in getting an extra crispness to the dynamics.
iFi Gryphon dac/Amp had a weird behavior that didn't work well for the Piety. As if the signal is being impeded somehow. Not as slammy, and just more hazy as a combo. Though, it oddly worked out great for my Focal Utopia headphone.
Oh on that note of impeding the signal....
I tried using my -10db Rothwell RCA attenuators to let my Dangerous Convert 2 9.75vrms hot signal pair with the Piety, and it worked fine.
BUT, when I used my Jbl MPatch2 passive preamp to bring down the hot signal of the Dangerous Convert 2 Amp, there was a crazy amount of
more bass slam to the combo.
The Rothwell attenuators resulted in less of a contrast to the bass (slam).... Instead you got a more.....continuous rounded warmth to the bass/mids presentation.
As for the Treble, the Rothwell Attenuators gave rounded down feeling to the treble. Like less of an etch....but this might be less "fun" for many people. Though it did also feel cleaner.
Overall, I stopped using the RCA attenuators for the chaining.
My silliness with a compatible AC power bank, the Piety slams more on the bass, but the LO Gain becomes as unforgiving as the High gain.
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Okay A/Bing the Magni Piety versus the Bryston BHA-1 amps:
Okay time to actually A/B.
DC2-to-MPatch2
MPatch2 outputs #1 Bryston BHA-1 & #2 Magni Piety
Headphone Focal Utopia
Out of the bat, BHA-1 feels more presenting with music from further a holographic plane. And the bass is less upfront. I need to go louder on the BHA-1 to reach the same slam on the Utopia.
The ending resolving movement of the bass excursion on the Utopia feels more controlled w/ a smoother movement in resolving back to position on the BHA-1.
Piety comes out more slammy. But that is in an expected compressed way. Bass resolves & ends notes much quicker. But not less fun to listen too. Just less sweet in the mids in comparison.
Piety does not make Bryston BHA-1 Amp obsolete for a solid state Amp that tries to emulate analog aspects. But Piety does an amazing job at emulating it as well...... and with more slam if that is your priority!
The song "Just the Two of Us" by Grover Washington really highlights the holographic difference between the BHA-1 & Piety.
If I am to set the BHA-1 as the baseline of being really analog and holographic presentation that encompasses feeling "ethereal". Then
Off the Piety, this song simply doesn't like the low gain mode.
On Piety high gain, the vocals sound with a step more intimacy compared to the BHA-1...but if you focus on the things around the vocals.....
Things sound as if in an airy cathedral room instead of sounding "sweet". On the BHA-1 however, rather than simply feel airy, things seem to be coming off from a different stage.
On the Piety, things are not happening on a seperate plane, but just there is an airy cathedral kind of dsp effect to things. Things still sound uncompressed and airy, but on the BHA-1, you get a sense of the echoes in the room rather than just the airiness of the cathedral.
Piety is still the more slammy presentation between them. You get an open airy sound that is great. It has plenty of fun strengths!