All things headphone

[scott]

God Rick don't you know :roll: the 1072 was the prototype a couple of years before the 1272. It's worth twice as much and sounds twice as good.

[Simon B]

here are some neve's.... somethings done match here either

http://cgi.ebay.com/Vintage-Neve-consol ... dZViewItem

http://cgi.ebay.com/VINTAGE-NEVE-RACK-O ... dZViewItem

[chris p]

you better quit the search while your nevitis is still in its "hey but those numbers don't quite match up stage " :)

Ouch - I think I just got burned.

You mean I just wasted my money getting one of these .....

[TimS]

you better quit the search while your nevitis is still in its "hey but those numbers don't quite match up stage " :)

Ouch - I think I just got burned.

You mean I just wasted my money getting one of these .....

That was great!
Cool face panel... where do I get one?? hehe

[rick]

i think that box needs a "tell my girl what i just bought - dont tell my girl what i bought switch "
then it would be perfect

[TimS]

i think that box needs a "tell my girl what i just bought - dont tell my girl what i bought switch "
then it would be perfect

I REALLY need one of those right now..
I'm just waiting to get a set of Rob's mic pres in the next 2 weeks.. Gonna be hard to hide in a small studio at home!!
Although she hasnt noticed the last mic and piece of rack gear I got.. I can hide it amongst my guitar rack stuff ;)
Darstardly I know :)
snigger snigger...
Tim..

[scott]

Thats funny Tim. Ha-I usually am to excited about whatever I have bought to hide it for long!

[TimS]

Yeah Scott - I have been talking about these pres for a while - we've saved a little cash that we have decided for each of us to spend on whatever we want - she is going to the Australian Open in Melb in Jan for the tennis for 5 days and I'm going to get my mic pres - pretty fair deal I reckon!!

[bennyboy]

hey

the old dead ringer is definatly better than the new
and better than a power amp resistor trick as i have ab tested the lot in the last week i have tried out over 15 head phone amps and systems in the last 2 weeks

the ha 1000 is in the top 3 it sounded clearer and louder than most brands that cost up to 10 times as much

i cant even blame head phones cause i also tried about 20 different types
the real acid test was it wasnt just me but a drummer and singer and 2 other engineers

i know its over kill but a good headphone system means alot to me

i have found 1 of these headphone amps so far in a pawn shop in penrith
and it has the same problem on the 3rd and 4th channel the same as urs rick so it must be a common manufacturing fault that is an easy fix

i am looking for more so i can move on
my opinion problem solved

thanks rick sorry to be a continual pest and every one else that was happy to
part with there gear for a couple of days

[jkhuri44]

so, what are good headphone amps? and not tooo pricey ones...for monitoring mixes (not for giving the musicians :P )....a friend of mine is asking me...he just bought a pair of dt770s.

[rob]

shameless plug

i have two custom headphone amps available for sale



asking price is $350
these are very high performance amps that will drive any headphone impedance, have a +4 balanced input and a -10 unbalanced input and a very expensive volume control. Mains powered, with XLR and RCA inputs and two headphone sockets.

[Chris H]

shameless plug

i have two custom headphone amps available for sale



asking price is $350
these are very high performance amps that will drive any headphone impedance, have a +4 balanced input and a -10 unbalanced input and a very expensive volume control. Mains powered, with XLR and RCA inputs and two headphone sockets.

It started with parting out neve desks for the modules......Now Rob has given us a window to the future....raiding avalon gear for the "very expensive volume control"

[rob]

only the knob is Avalon raided and this knob may go back into the spares drawer before it leaves here! Oh and the pot behind the knob is much better than anything you'd find in an Avalon : )

Rob

[jkhuri44]

does you have more than 1 of these rob?

they looks nice!

[rob]

i have two....i really should keep one for myself, but the budget on the new pergola has blown out...so i'm open to offers!

R

[Ausrock]

In a box somewhere, I have a few 50 Watt and 100 Watt amp modules (remember the old EA/ETI standards from waaayyyy back).

Would it be possible to put these to use for headphones?

[chris p]

I'm more interested what's behind the knob - man, that sounds far worse than I meant.

What I mean is, what pot are you using? No, wait, that sounds bad too.

Rob, do you use a stepped resistor network or just a high quality resistive potentiometer? Do you sell them individually? Yeah, that's it.

[rob]

ok lets try and stay focused here

the pot is a high quality Alps type. Best stereo tracking i've seen in a pot for a long time, this is the main thing for me in stereo pot.

are you asking where to get the pot?? if so, RS is the easiest source

R

[jasound]

You should have a look at the Hear Technologies hearback system. We've been using them for the past year with great results. 8 analogue or Adat light pipe inputs. 1 stereo and six mono or 4 stereo, all with individual volume control. 1 hub can run 8 headphone mixing boxes via cat5, each HP box can run 2 sets of cans. There are other features, but I ain't here to sell them.Their loud and they also sound good.
Good luck

[rick]

hey rob , ausrock has asked nicely twice , when you have moment can you explain how to load his power amps with resistors so he can try the resistor build out thing that studios have been doing for years .
i have never really figured it out properly myself

[rob]

using a 50 to 100watt power amp to drive Headphones is pretty straight forward

put a bunch of TRS sockets in a box and join all the sleeves together, to this connect two common wires to the -ve or 0V outputs of the amp. From each ring add a 47R 2W resistor, then join all the far ends of these resistors together and connect a wire that goes to the right amp output. Similarly add a 47R 2W resistor to each tip of the sockets and join the far ends of these together, add a wire to this point and connect to the left output of the amp.

done

if you did say 10 sockets and plugged in 10 typical 32 ohm headphones the amp would see a load of around 8 ohms total and should be happy. If you happened to plug in 10 x 8 ohm headphones the amp would see a load of 5.5 ohms and should be working hard but still ok.

Note this all works for transistor amps who are happy driving from 4 ohms to open circuit. Tube amps like to see a specific load all the time and are not really suitable for adapting to splitting to random headphones like this.

The thing to nail with this use of a power amp is the grounding and interconnection of the wiring to the source as typically the amp will be unbalanced and a good candidate for ground loops. Even low level hum and buzz in headphones is annoying

R

[Ausrock]

Ric,

Many thanks for being on the ball.

Rob,

Thanks for that explanation...........I've now added that to the "to do" list.

[tall_phill]

Is there a way to attach PDFs to these messages?

I have the product sheet for the Proco box I mentioned. It includes a schematic that does exactly what Rob describes - with the addition of volume and stereo/mono controls.

Not that its very complicated, but everyone likes pictures right?

Phillip