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Anyone know about these?
- Thread starter SurfPro
- Start date
Calrad headsets have kind of been an old reliable, use almost anywhere, standard. Kind of surprising to hear of two bad ones at all let alone two in a row. I guess it can happen though. I use them and the Koss QZ 99's for the detectors that like the higher impedance headsets.
tvr
tvr
SP,I have bought detectors that came with Calrad headphones.My opinion of these is a poor quality cheap headphone.Two out of the three sets I came across had a bad short in the wire,which not very dependable even for backups. HH Ron
Hi SurfPro, I ended up with a set of detector pro headphones. They are a good quality set but I don't know if they are the best set for the GT. I haven't tried any other kind and not too many people mention these. They work for me though. About those Calrad's ,one must of had a short or something,all I could hear was static and noise. They replaced them with another set that had one of the speaker's just laying in the muff and flopping around,not attached to anything.
Good hunting Gary
Good hunting Gary
Critterhunter
New member
Those Sonys from Walmart (studio style) that somebody on here pointed me to seem to work very well. They have a lower resistance than the 32 that Minelab calls for. I'm not sure if that's more of a detector volume control thing to have that working properly in the wanted range, or if it helps in other areas as well. I can say that they have much more better tone quality than the Grey Ghosts I tried which had a real high resistance. The only problem is the Sonys have no volume control, and even with the volume on my GT set at it's lowest they are still just a tad too loud. I fix that by moving them slightly off center of my ears, but a better way would probably be to tape some foam over the speaker holes inside the muffs. They are for sure way more comfortable than bigger headphones, and not sweat up your ears as bad. I like them. Light too.
Hey Critterhunter,you seem to be on the ball when it comes to technical stuff. Thank's for all the good info in your post's they get people to think and ask some question's of there own. What's this stuff that your headphones impedence should be close to the detector's impedence? You also mentioned that Minelab call's for something in the 30's so does that mean that all these expensive headphones with 150 ohm's may not be the best choice? What's everyone's opinion on this?
In your favorite search engine search the term "voltage standing wave ratio". You should find some explanations of what it means and the affects of a mismatch of impedance on driving and receiving circuits. Mainly less power transmitted and distortion.
In my opinion (not having done the math on any particular detector design) in low power, narrow audio range use like metal detector audio circuits probably are, speaker efficiency or sensitivity may be more important than a real close impedance match with respect to the user's ability to hear what you need to hear.
tvr
In my opinion (not having done the math on any particular detector design) in low power, narrow audio range use like metal detector audio circuits probably are, speaker efficiency or sensitivity may be more important than a real close impedance match with respect to the user's ability to hear what you need to hear.
tvr
Critterhunter
New member
gear box said:
They list the ohms in the manual for the GT that you should try to match with the headphones. I do have some background in electronics but I know very little about speakers, so your guess is better than mine. Like I said, I would figure too high of resistance would at least make the volume level lower, and perhaps not allow some of the more finer distinctions in tones to sound through, but that's just a guess. I do know the Grey Ghosts I used with high resistance sounded very flat in the differences of the tones, and that I had to max out the volume control on the detector and nearly max it out on the headphones to get the volume loud enough for me. Frequency response would I guess be how much variation in sound (highs/lows) the speakers can generate, but again that's a total guess on my part.
I found the Timberwolfs the be the loudest and the best for me and my bad hearing, these are 150 ohms. The Troy Pros I have also are loud on my Sovereign, but not as loud as the Timberwolfs and now on my Explorer and E-Trac the Troy Pros are by far the best volume and tone quality for me.
I too am a electronic Tech, but never paid much attention to impedance matching for audio, but know some 150 ohm headphones work better on some detectors than the others do and many 32 ohms headphones I get so very low volume it is hard to hear at all. There was a article on this a few years ago and I should have saved it as it told you why some of the higher impedance were better then the low one, but believe the low ones too less current to run which gave a longer battery life over the higher ones.
I just know what works the best for me and my hearing as I have tried many different sets trying to find the right ones.
Rick
I too am a electronic Tech, but never paid much attention to impedance matching for audio, but know some 150 ohm headphones work better on some detectors than the others do and many 32 ohms headphones I get so very low volume it is hard to hear at all. There was a article on this a few years ago and I should have saved it as it told you why some of the higher impedance were better then the low one, but believe the low ones too less current to run which gave a longer battery life over the higher ones.
I just know what works the best for me and my hearing as I have tried many different sets trying to find the right ones.
Rick
Critterhunter
New member
That shoots down my theory about higher resistance speakers needing a higher volume adjustment. 
The only other thing I can relate is that I found the Grey Ghosts had even less distinction in tones than a cheap Koss pair I have, along with the Sonys.
The only other thing I can relate is that I found the Grey Ghosts had even less distinction in tones than a cheap Koss pair I have, along with the Sonys.Hey Rick,you mention quite often that Timberwolf 's are the best for you because of they are loud. What about the tone quality? Do they have the best tone quality also? Can you easily pick out the subtle changes in the tones? What other brand would be loud and have good tone quality? Thanks Rick for any info you can provide.
Good hunting,Gary
Good hunting,Gary
For me and my bad hearing I find the Timberwolfs gives me good tone quality along with the volume I need. Now one of the last times out I got a broken wire at the jack and had to use my Troy Pros I keep with my E-Trac and found that these may not have been as loud, but the tones seem to be a bit mellower and easy to hear. The real problem is finding a set of either one as the Troy Pros have been back ordered for over 2 years now and don't think the Timberwolfs are being made anymore as last I heard Ron at Dixie was building them, but believe he is now out of business.
I just got a new set to try in the spring that seem to have the volume and lighter weight with some smaller ear cups, but the tones seem to be a little tinny sounding. This was my fist impression and will have to actually use them in the feild too see how they will work.
Rick
I just got a new set to try in the spring that seem to have the volume and lighter weight with some smaller ear cups, but the tones seem to be a little tinny sounding. This was my fist impression and will have to actually use them in the feild too see how they will work.
Rick