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Dirty-South Blues Harp forum: wail on! > Harp Attack with Headphones ?
Harp Attack with Headphones ?
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AirMojo
79 posts
Jan 07, 2011
3:09 PM
I'm pretty sure that I read somewhere (I think on here) where someone was using headphones with their Harp Attack pedal...

I got a Harp Attack for Christmas, and tried using headphones and I do not get any sound from it ?

I tried with a regular 1/4" stereo jack headphones... that didn't work... then tried a 1/8" stereo to 1/4" mono jack, and that still doesn't work.

So what's the scoop on getting the headphones to work ?
Gig74
42 posts
Jan 07, 2011
3:21 PM
I'd run the the delay to amp and then I'd put headphones in the amp, that should work. Sorry if it sounds obvious.

Greg
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Living the dream and learning the blues one little trouble at a time.
Greg Heumann
973 posts
Jan 07, 2011
5:38 PM
It was me. You can use the HA with headphones but you will need two things: First, the output of the HA is high impedance and headphones are low impedance devices - you need an impedance matching transformer. 2nd the HA is a line/mic level device, it isn't an amplifier. You need a headphone amplifier.


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/Greg

BlowsMeAway Productions
BlueState - my band
Bluestate on iTunes
AirMojo
80 posts
Jan 07, 2011
6:37 PM
@Greg Ah-oh... this is more complicated than I imagined... I searched the forum, but couldn't find anything, except for "Bb" mentioning using headphones with his Harp Attack.

I have a Shure impedance transformer, but not sure about the connectors... I know nothing about "headphone amplifiers".

Any suggestions on a good headphone amplifer to use, and how it all hooks together ?

Using headphones with the Harp Attack to practice quietly would be great and fun to play around with.

I really appreciate the help !

Ken H in OH
Harp boy in progress
64 posts
Jan 08, 2011
4:13 AM
yo ive just tried it with a green bullet, turn the mic waaayyyyy up and it works!
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Nick Moore
Bb
251 posts
Jan 08, 2011
8:01 AM
I run mine (which is part of my pedal board) through a small mixing board. Headphones out of the board. It lets me play along with backing tracks and stuff without disturbing the rest of the house too much. Works well.
-Bob
Greg Heumann
978 posts
Jan 08, 2011
11:04 AM
@AirMojo: Check out "Boostaroo" - http://www.boostaroo.com/ cheap, functional battery powered headphone amps.
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/Greg

BlowsMeAway Productions
BlueState - my band
Bluestate on iTunes
AirMojo
81 posts
Jan 08, 2011
3:01 PM
@Greg I found your post on the Lone Wolf forum:

http://www.lwharpamps.com/forum/viewtopic.php?f=7&t=528&p=3693&hilit=headphone&sid=1f221b8e243f077e7bd6e481db2f1598#p3693

I will have to stop at the local Radio Shack and see if they have a Boostaroo in stock.

So my Shure Line Matching Transformer (Model # A95UF) should work with this setup ?

I have screw on male 1/4" adpter (to plug in the output of the HA), and an XLR female w/ 1/4" male adapter... and I guess I will need some adapters to go into the 1/8" male Boostaroo cable... that's a motherload of adapters that'll be sticking out of the HA !
jonlewandowski
13 posts
Jan 08, 2011
3:19 PM
@AirMojo...I have the same setup as Greg H. He has a pic posted on the Lone Wolf forum. Works awesome. Worth every penny! Use it all the time...
AirMojo
82 posts
Jan 08, 2011
4:05 PM
@jonlewadowsk Where did you get the "DI box" (impedance matching transformer) ?

It sounded like Greg made his... and looks like a pretty simple device, without a bunch of "adapters"...
Greg Heumann
982 posts
Jan 08, 2011
11:43 PM
Yep - I made mine. But the guts is nothing more than the same transformer you would find in any "impedance matching transformer" made for musicians to put a low-Z source like an SM57 into a high Z load like an amp, or to put a high-Z source like a JT30 into a low-Z load like a PA.

Set it up with the high-Z leads on the HarpAttack side and the low-Z leads going out to the headphone amp.
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/Greg

BlowsMeAway Productions
BlueState - my band
Bluestate on iTunes

Last Edited by on Jan 08, 2011 11:43 PM


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