[movinIron]

Yes, explained by Ohm's Law. To determine how loud a headphone will go when driven by a particular amp, you would find the power spec for the amp at that impedance. According to Ohm's Law, each increase of 3dB requires double the power. The Magni 3+ specs show "Maximum Power, 32 ohms: 2.4W RMS per channel".

For the Grado GH4 (Impedance = 32Ω, SPL/mW = 99.8dB, rounded off to 100dB for simplicity) and Magni 3+
1mW = 100dB
2mW = 103dB
4mW = 106dB
8mW = 109dB
16mW = 112dB
32mW = 115dB
64mW = 118dB
128mW = 121dB
256mW = 124dB
512mW= 127dB
1024mW = 130dB
2048mW = 133dB

So assuming the manufacturer's specs are accurate (not always a valid assumption), the GH4 will go to roughly 134dB and damage your hearing or maybe blow up before the Magni clips. Note that the above is not an indication of sound quality.

Maybe I got the question wrong? I understood: ‚Are sensitivity and impedance correlated at all (events/cases)? ‘.
If you take a driver and change it‘s impedance from 38 Ohm to 150, 400 or 16 or whatever impedance, even 39 or 37.999… , than yes. But that’s a single case.
You can create Loudspeakers/Phones with let’s say a 102 dB sensitivity by any impedance.
Sensitivity is also not the best word for it. Maybe ‘effectivity‘ would be better.
But the word is used for eons now and we are used to it.
(Sound-) Volume is the result of sound pressure by … volume. As in room by 3 dimensions.
Filled with air. By 20°C (68°F). By 1g. Etc.
The problem is - no one had exactly defined the length, height, width of this space.
And other specifications. And that they have to measure it on a late spring afternoon … in Zurich.
The funny thing is, that there are people which are absolutely sure that all this is exactly specified.
For example many manufacturers measure their products sensitivity at 1kHz. Beyerdynamics use 500Hz. Maybe they had the same old physics book, in which I, ages ago, found that 500 Hz is the beginning of the midrange frequencies. (It is not!)
To increase the sensitivity, make your membranes lighter, the voice coil lighter, stiffen the membranes, widen the pass, raise magnetic flow, etc.
Closed back headphones often have a higher sensitivity in the low frequencies.
My LCD-2 (open back) has an impedance of 60 Ohm, which is not really high. Should be pretty loud, but has this lousy 91dB sensitivity (they say ’efficiency‘).

Impedance is a more complicated thing. A high phone impedance ist better for Impulse response.
A low output impedance can reduce the noise floor.

‘Many manufacturers‘ is fun sounding.
Still smile at ‚dongle DAC‘.

 

[Stevko]

anyone tried Fiio btr5 with Grado?
sold my schiit Hel 2 today....

 

[SrTexugo]

 

[redlegs75]

I know I alluded to this in a previous post but my new Grado SR 80x just makes the music seem so vibrant and alive. I don’t detect any harshness either. Such a fun set of cans. I am getting to the point where I like listening to cans more than my living room speakers. Do any of you also sense a vibrant, alive headphone that spreads the energy of the music? I am not an audiophile by any means but wanted to share my thoughts.

 

[DTgill]

I've kind of been eyeballing this can, how do they sound?

 

[Stevko]

anyone tried Fiio btr5 with Grado?
sold my schiit Hel 2 today....

I took a ifi xcan instead. A dealer gave me 35% off
now I need some new grados with 3.5mm jack. the 325 big jack will not fit in my xcan

 

[Mightygrey]

I took a ifi xcan instead. A dealer gave me 35% off
now I need some new grados with 3.5mm jack. the 325 big jack will not fit in my xcan

https://www.aliexpress.com/item/323...f171f7b-15&pdp_ext_f={"sku_id":"54020152665"}

 

[sjbrook]

I took a ifi xcan instead. A dealer gave me 35% off
now I need some new grados with 3.5mm jack. the 325 big jack will not fit in my xcan

Get the OEM pigtail. The most appropriate adapter for Grado cans!
https://www.amazon.com/Grado-Mini-Adaptor/dp/B001DK1ZVO

 

[carboncopy]

 

[Pirastro]

Since you posted the pic, now you have to rank them!

 

[carboncopy]

Since you posted the pic, now you have to rank them!

Well…it’s like…I live 2 weeks with one and I think, this is the best. Then for some reason I just wan’t an other…don’t know.

Recent days it is the HEMP again. Before that for weeks the RS1 classic. Before that the HP2i. Ok, the last one is a cheater. The rule is: never start a session with the HP2i if you plan to change to an other can the same day. It has it’s quirks, but it is so clear (in a good sense), so “nude”, that every other phone after that is fake sounding, especially in the midrange.

What I know for sure is, that GS1000i gets the least playtime. There is some harshness in it (in the highs), that is not present in any other of the smaller Grado’s I have. It can be unpleasent sometimes.

 

[Knee Deep In Epoxy]

Got the 60x... they sound great for the price in stock form. But then tried them with all the pads... Yaxi S, S (stock), L (Geekria), F (from hemps), G (Geekria and Grado).

Impressions in order of preference:

1. G (Grado) - most comfortable, most open, sparkly sound with lovely bass

2. G (Geekria) - less comfy than Grado G, much more open and sparkly than stock but less than Grado G. Warmer than Grado G. Less warm than stock but bass more impactful.

3. L (Geekria) - most open small profile. I plan to use 60x outdoors so these will be used a lot. Wish Yaxi would make a purple version! Significant sound upgrade to stock.

4. Yaxi S - very slightly more open and sparkly than stock. The purple is gorgeous. More comfortable than stock and L pads but L sounds better to me.

5. S (Stock) - great out of the box for the price. Bit warm in the mids for my taste.

6. F pads - least comfortable. Warmest sounding overall and most bass.

EDIT: Just received original Grado L-Cush. Geekria L's sound exactly the same, are softer and fractionally more comfortable. Grado pads have fewer visible flaws in the foam edging (if that matters)

EDIT 2: L cush of any kind sound great but really hurt after during long sessions (over an hour).

 

[buzzanyone]

Hi guys, I'm new here. I've been using the Grado SR60e (absolutely love them!) and have been meaning to upgrade it for awhile now. Curious what you guys think about the GW100s and how they compare to the 225x's which are the same price where I come from. Can't decide if the pros of having bluetooth connectivity and detachable cables are worth the differences in sound quality. So for those of you who have heard both, how do the GW100s stack up to the SR225x's in terms of sound? And while we're at it, are the 325x's worth an extra $100 compared to the two?

 

[Stevko]

Gw 100 is really good. Sold my 225e before i bought the gw100.
My mind says the 225 are a bit better.
You wil not regret if you buy 225 or gw.
325= metal and nice leather

 

[iFi audio]

That's a lovely shot. Can I ask whether was this made by a smartphone?