Tube AMP and stax headphones....

[loncar]

Hi, im new in tubes.
Have just assebled a 2x16 watt AMP. Id like to use my stax headphones (electrec type) that are driven with speaker output.

Is that load ok for tube AMP? Or how do i calculate???

Thanks and sorry for the simpel question!!!



Best regards
D. Loncar

 

[loncar]

doesnt anybody have any expierience with that? or knowledge?

br d.loncar

 

[dsavitsk]

Perhaps if you gave the schematic or model of the amp, and the model of the headphones, someone might know something.

 

[loncar]

AMP 2x16 watt from tubedepot.com and stax sr40 electret headphones.

 

[RevMen]

Do you mean this one?

Model 16LS Stereo Integrated Tube Amplifier

 

[razorrick1293]

16 watt sounds a bit high for headphones, maybe you should try a dummy load with a potential divider on the speaker out, that should keep the impedance but lower the power for headphones. but im not sure about the electret headphones, and how levels will affect them

 

[jcx]

try head-fi for info

Sr-40 -Grado - Search

 

[woodturner-fran]

Are you using an srd-7 adapter with the amp for the stax? If so you will be fine - its an easy load for the amp.

 

[Frank Berry]

Your amp should power the headphones without a problem.
Be aware that the headphones can reproduce the audio accurately but they can't deliver high sound pressure levels.

 

[loncar]

Thanx for the replies. Its these two:

Model 16LS Stereo Integrated Tube Amplifier

And

Googles billedresultat for http://i-cdn.apartmenttherapy.com/uimages/unplggd/031111SR40.jpg

 

[GuidoR]

Hi.
SR-40 are electret (electrostatic) headphones. In the black box that comes with the headphones (srd-7) there are two transformer, to provide the high voltage-low current needed to energize the hp, and it's an easy load for the amp.
If you need to go one (big) step beyond (apart from purchasing another Stax...) try this The Tube CAD Journal, Electrostatic Headphones

Even with the small SR-40 the sound is amazing! (and loud!)


Guido

 

[loncar]

Thanx

 

[loncar]

So its enough load for the AMP. It wont blow whitout real speakers connected ??

 

[GuidoR]

Just go for it (and enjoy!)

Guido

 

[Frank Berry]

The transformers in the SRD-7 interface will provide the proper 8 ohm load for your amplifier. Hook it up and enjoy.

 

[Sheldon]

The transformers in the SRD-7 interface will provide the proper 8 ohm load for your amplifier. Hook it up and enjoy.

Or, at some point down the road, wind or find some appropriate transformers to replace the 8Ohm versions in your amp, and drive the headphones directly from the amp.

The transformers in your amp step down the voltage, and the transformers in the adaptor box, step it back up. Just to illustrate, let's say the step down ratio for the amp outputs is 10:1, and the step up ratio of the adaptor is 1:10, then, a single 1:1 transformer will replace both.

Sheldon

 

[SandorS]

Question Stax SRD-7 adapter

Hi there,
Please if you could help with this:
As you say it's an easy load, please do you happen to know or estimate its input impedance?
Am in the same shoes trying to connect Stax Lambda via his adapter to a tube amp.

Many thanks

Sandor

Are you using an srd-7 adapter with the amp for the stax? If so you will be fine - its an easy load for the amp.