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Skeptico Saloon: An Objectivist Joint - Page 11

post #151 of 915

Me neither. Since it's based on a T50RP which produces about 107 dBSPL @ 1V and 54 ohms you don't need much power. Some ~30 ohm dynamic headphones need more current, others need more voltage, but nobody recommends 1000 mW amps for them, so that's not it.

 

My guess is that there's a new group of people that fear if barely touching the volume control doesn't pop your eardrums your amp is not up to the task. Ask them why they don't use power amps for their headphones.


Edited by xnor - 8/18/13 at 4:14pm
post #152 of 915
Thread Starter 
Yeah my ER4S only shows its true potential with one of these. I only need to turn the volume knob one nanometer.
post #153 of 915

http://www.innerfidelity.com/content/ultimate-headphone-guide-articles-what-headphone-amplifier-and-why-do-i-need-one

Quote:
Many non-portable, high end home headphones are less efficient, though, and some, like the currently popular planar magnetic headphones, are really not at all efficient, and require more than a few watts of power to generate the same output level that an high-efficiency IEM can generate from one milliwatt. Headphones with sensitivity specs in the 95dB or less range (as a very loose guide) are more likely to require a headphone amp.

Um, what?

post #154 of 915

It's true, but only if you take exceptions like the HE-4/6 and compare it to highly efficient IEMs.

 

Most other planar magnetic headphones are at least 10 dB more sensitive and then you're down to a small fraction of a watt again.

post #155 of 915
I had someone PM me asking about my system. I replied, outlining all the work I've done to make it sound great. He was disappointed that I told him about the development work I did instead of just listing expensive equipment. Oh well!
post #156 of 915
Quote:
Originally Posted by xnor View Post

It's true, but only if you take exceptions like the HE-4/6 and compare it to highly efficient IEMs.

 

Most other planar magnetic headphones are at least 10 dB more sensitive and then you're down to a small fraction of a watt again.

 

Indeed. From IF's measurements:

 

Shure SE535 — 0.012 V (rms) or 0.0041 mW for 90 dB SPL

HiFiMAN HE-6 — 1.018 V (rms) or 19.59 mW for 90 dB SPL

 

That's about 4750 times more power needed. Now, the key is that you'd never use 1 mW (except in an extreme peak) with something as sensitive as SE535 because that'd be 114 dB SPL. But for equivalent volume out of HE-6, yes, you do need "several watts".

 

 

 

Quote:
Originally Posted by bigshot View Post

I had someone PM me asking about my system. I replied, outlining all the work I've done to make it sound great. He was disappointed that I told him about the development work I did instead of just listing expensive equipment. Oh well!
 

But, but, but...!

post #157 of 915

Guess some people just want to buy some expensive components (since those have to be good, right?), connect them (probably again with expensive cables for the same reason), thinking it will result in a high quality system. Especially with speakers in a room it's not that simple.

Same could be argued for headphones btw, since everyone has a differently shaped head, pinna, ear canal ...

post #158 of 915

BTW what is your system like bigshot? I'm kinda curious about the amount of work that is needed to create a good speaker set up

post #159 of 915
http://db.tt/fl18Wbj0

I went to the LISTEN HRIR database, downloaded the data for all 51 subjects, extracted the HRIR for front projection (zero elevation and azimuth), and separated the HRIR for left and right ears (which could be quite different resulting in channel imbalance). The result is 102 different HRIRs potentially creating frontal imaging for headphones. Load these with a convolver plugin for your player and listen for the best HRIR for you biggrin.gif
post #160 of 915
Does anyone know if the PRIRs for the Smyth Realiser can be downloaded and used as impulse responses for a generic convolver, or whether they are encrypted or copyrighted?
post #161 of 915
Quote:
Originally Posted by DairyProduce View Post

BTW what is your system like bigshot? I'm kinda curious about the amount of work that is needed to create a good speaker set up

 

All of my money went into the speakers- top of the line Sunfire sub, custom built 12 inch 5 way studio monitors, JBL towers and Klipsch center and rears. I use a regular old Yamaha receiver and a $120 Sony bluray player, along with a Mac Mini connected to a 40 TB RAID.

 

The work was in arranging the room, because I couldn't hang any acoustic panels, and equalization. It took about six months of tweaking the EQ to arrive at a pleasantly neutral setting, My system doubles as the sound for my hidef video projection. It has a ten foot screen, so I needed a very wide soundstage with no dropouts in the middle. Just balancing the volume levels of the front channels took forever to get right.

 

At this point, the sound is absolutely perfect from a whisper to a roar. I can turn the volume up without any congestion. In fact, the walls of the room rattle long before the speakers will! Yamaha's DSPs, particularly the 7:1 Stereo DSP do a tremendous job of widening and focusing the soundstage. I can flip from direct out of the amp with no correction to full EQ and DSP. It's really like night and day.

 

I'll do a longer post with pictures sometime if anyone is interested. Anyone in LA is welcome to come check it out.

post #162 of 915

I'm interested in seeing your setup! Though I'm not sure this is the best thread to post it?

post #163 of 915

It's a bit of work to photograph it all. I'll see if I can do it one of the upcoming weekends and I'll start a new thread.

post #164 of 915
Please put a link in here.
post #165 of 915

Looking forward to seeing it!

 

BTW, do you still use headphones for a different kind of presentation to speakers?


Edited by DairyProduce - 8/21/13 at 10:09am
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