[DrSheep]

If you look at the numbers our calculations are identical.  What I didn't know is that he got the specs for the OPA2227 for the model of current drop off at high impedance, and that's what confused me.  Because when you think about it, logically you would assume the current (mA) remain constant if you have a big enough power source, so I was assumed it will be 45mA all the way up to 600 (or Pmax x Vmax = constant), which of course it is wrong.

 

[Headphonejunky]

No I'm not sure, but this person might be. The calculation for the power at 32 Ω was nearly spot-on. That user is also an active poster in the sound science thread so I feel confident with the calculations. But no I'm not 100% certain.
http://www.head-fi.org/t/647838/jds-labs-c5-portable-amplifier-appreciation-discussion-thread-check-1st-post-for-review/450#post_9233131

That is the verza output power you posted?

 

[miceblue]

Quote:

Quote:

No I'm not sure, but this person might be. The calculation for the power at 32 Ω was nearly spot-on. That user is also an active poster in the sound science thread so I feel confident with the calculations. But no I'm not 100% certain.
http://www.head-fi.org/t/647838/jds-labs-c5-portable-amplifier-appreciation-discussion-thread-check-1st-post-for-review/450#post_9233131

That is the verza output power you posted?

 
No it's for the JDS Labs C5 portable headphone amplifier.

 

[DrSheep]

See now I wonder, the C5 only reach max power at 150 ohms and that's still only about 75mW; the VERZA on the other hand has 150mW at 32 ohms, which is the same as the M-100 impedance.  I think this is why Val said that the VERZA is tuned for the M-100 .

 

[Headphonejunky]

No it's for the JDS Labs C5 portable headphone amplifier.

The c5 sounds good but the verza is so convenient. Im hoping it can power the 300 and 600 ohm cans well. I tried using the Fiio E17 with the rubber bands yesterday and i hated it as i wanted to play with my phone and the rubber bands were in the way.

 

[Headphonejunky]

See now I wonder, the C5 only reach max power at 150 ohms and that's still only about 75mW; the VERZA on the other hand has 150mW at 32 ohms, which is the same as the M-100 impedance.  I think this is why Val said that the VERZA is tuned for the M-100 .

So according to that info the verza is more powerful. The c5 does less power. Can Val or someone due a full load test on this with 300 ohm cans. If i had one i would figure it out as i have lots of test equipment for testing car amps

 

[DrSheep]

Quote:

So according to that info the verza is more powerful. The c5 does less power. Can Val or someone due a full load test on this with 300 ohm cans. If i had one i would figure it out as i have lots of test equipment for testing car amps

See, it is question like this REALLY make me want to go by a HD800 or something like it just to test it out...  However, for you either the C5 or VERZA should be find as the M-100 is only 32 ohms, and pretty much anything can drives it.

 

[Headphonejunky]

See, it is question like this REALLY make me want to go by a HD800 or something like it just to test it out...  However, for you either the C5 or VERZA should be find as the M-100 is only 32 ohms, and pretty much anything can drives it.

See i have some sennheiser HD650 at work i am playing with. Not looking to have it power HD800 but just want it to power HD650. It if was just for M100 i would use the Fiio e17 and call it a day. In the past in car audio i buy a car amplifier based on Damping Factor. Damping factor is the amount of control the amplifier has over the speakers. Is there a similar rating in headphone amplifiers? See ill spend money if it is justified and as of right now the Verza is just convenient but double or triple price of the other one being recommended. Convenience and style does come with a price but there must be a major separation between the 2 amplifiers.

Im also new to the forum and trying to learn what to look for as this is a new realm to me.

 

[DrSheep]

If you really want a safe bet, the Headstage Arrow 3G was tested with BOTH HD650 and HD800 playing together with good results, and they are about to launch 2 new models the 4N and 4T to the same effect.  Check it out if you don't want to play guessing game (but I would still like you to at least try out the VERZA...)

 

[Craigster75]

Quote:

See i have some sennheiser HD650 at work i am playing with. Not looking to have it power HD800 but just want it to power HD650. It if was just for M100 i would use the Fiio e17 and call it a day. In the past in car audio i buy a car amplifier based on Damping Factor. Damping factor is the amount of control the amplifier has over the speakers. Is there a similar rating in headphone amplifiers? See ill spend money if it is justified and as of right now the Verza is just convenient but double or triple price of the other one being recommended. Convenience and style does come with a price but there must be a major separation between the 2 amplifiers.

Im also new to the forum and trying to learn what to look for as this is a new realm to me.

fyi, my old E11 has significantly more power than Vamp or Verza.

 

[miceblue]

See now I wonder, the C5 only reach max power at 150 ohms and that's still only about 75mW; the VERZA on the other hand has 150mW at 32 ohms, which is the same as the M-100 impedance.  I think this is why Val said that the VERZA is tuned for the M-100 .

Yeah but the M-100 only needs 31 mW of power to reach 120 dB SPL. I think it's an overstatement to say that the VERZA was built for the M-100 because the most power delivered from it is at 32 Ω. XD

 

[DrSheep]

Quote:

Yeah but the M-100 only needs 31 mW of power to reach 120 dB SPL. I think it's an overstatement to say that the VERZA was built for the M-100 because the most power delivered from it is at 32 Ω. XD

Well true, but just as engine designed to have max torque and power at a given RPM, it will be nice to know the VERZA perform it's best at the M-100 impedance level.

 

[Anthony1]

Anybody know where I can possibly buy the VV in Melbourne?

 

[AnakChan]

Quote:

Anybody know where I can possibly buy the VV in Melbourne?

 
Pity you couldn't join the meet yesterday. I actually brought the VV along with me.

 

[Anthony1]

Bugger but due to the changes in times just couldnt juggle it and family.