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Post by Deleted on Mar 2, 2012 8:14:37 GMT
Output signal strength: up to 15 Volts at 32 Ohm
I'll do the math for you: 7W in 32 Ohm, about 5W into 50 Ohm (HE-6, LCD's) Doesn't say at which distortion level though.
needless to say... be carefull with 50mW to 200mW rated headphones with it.
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XTRProf
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Post by XTRProf on Mar 2, 2012 8:56:46 GMT
Output signal strength: up to 15 Volts at 32 Ohm I'll do the math for you: 7W in 32 Ohm, about 5W into 50 Ohm (HE-6, LCD's) Doesn't say at which distortion level though. needless to say... be carefull with 50mW to 200mW rated headphones with it. Arghhh, it's OPA output like yours?
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Post by Deleted on Mar 2, 2012 9:37:10 GMT
Almost.. Tube followed by an opamp with discrete output stage to deliver the power. My design is tube followed by 'power'opamp. In that respect you may not like it. On the other hand if Mick says it sounds great (certainly paired with HE-6) your reservations about opamps might be errrm.. It would be quite foolish of HiFiman to build/sell an amp that doesn't get the most out of their top of the range headphone. Obviously they don't share your reservations about the use of opamps. Ian's findings on SQ of the Zigis amp also might have some meaning. That opamp is even used far outside it's intended usage (driving loads below 600 Ohm). It won't have the typical distortion that transformers bring into the mix though. No hybrid will
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Post by Deleted on Mar 22, 2013 19:51:34 GMT
Here is a copy of the email that i have sent Frans earlier this evening. I will post some photo`s of the filter tomorrow. Hi Frans, Filter has arrived and up and running. W O W, this filter has turned what i consider to be a great pr of Headphones, into the best i have ever heard. The bass is superb, the peakiness has gone in the treble, it also amplifies the sound to the point where i can turn the gain down on my EF5. I wish you could here the end result of your work, it is truly amazing, hard to put into words really. As good as the Fostex T50`s are for the price, these HE6`s just blow them away in all aspects of the music spectrum, and in fact make the HE6`s + filter combination an absolute bargain for the price paid, and i would think impossible to beat by anything available today. I am going to get hold of a pr of LCD 3`s again to compare, as they were the best i had heard, but am confident that the HE6`s will now better them for SQ. Thank you so much Frans, your talents never cease to amaze me, you really should be putting your work into the general market place, and reaping your fortune. Kind regards. Mick. Here are some photo`s of filter, stand alone and installed. Its powered by a 12v dc Little Pnkie, that Mike made for me some time ago, and has a +12v-12v inverter contained within the enclosure along side the filter pcb.
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XTRProf
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Post by XTRProf on Mar 22, 2013 23:26:07 GMT
Wow, the ante had been up. It will be very interesting Mick if you can compare with the "James Bond" Stax or his "fellow colleague" 009 too and feed us the "worms". We Chicker Dees will flock to mama again here.
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Post by Deleted on Mar 23, 2013 9:59:33 GMT
Forgot to add that the switch on the filter, just switches the filter system in or out, so you can do a direct A-B comparison whilst listening.
Mick.
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Post by Rabbit on Mar 23, 2013 12:57:54 GMT
Virtually the same as my T40 filter Mick. I have the in/outs on the back though and the power switch on the front. On the T40, it's like you've blown your nose when you switch it in!!
I like the T40 so much now, I've bought a storage case for it so I can pack it in a suitcase without damage when I go away.
What I need now is a really powerful portable amp to drive it!!!
After hearing the T40 and 50, I must admit, I am tempted by a posh ortho!
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Post by Deleted on Mar 23, 2013 13:56:42 GMT
Yes Ian,
It makes a subtle, but in a way, a huge difference.
When i first tried it, i was switching in and out every few seconds, as it wasn`t day and night between on and off....wrong.
So then i played a whole track through with filter switched out followed by the same track again filter switched in.
It then became apparent that the filter was defining the Bass with much more definition, and the treble was more silkier.
Looking forward to receiving the appropriate filter for the T50`s, although i like the sound of mine with just a few of the modifications carried out, but then i thought the same about the unfiltered HE6`s.!!!!
Mick.
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Post by Rabbit on Mar 23, 2013 14:59:45 GMT
The T50 filter isn't subtle Mick. It lifts the top end a lot and bass goes deeper. Sounds like a different headphone tbh. It's likely that the HE's don't need as much tweaking.
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Post by Imagemaker18 on Mar 23, 2013 17:12:04 GMT
Hi, Mick I am not going to say "I told you so!" because you already knew that! I am glad to know you are happy with the filter! My impressions when I finished the filter were identical. As good as the T50RP is, my HiFiMan H-500, and as you so state, the HE-6 win hands down. The bass and midrange on my HE-500 simply can not be matched by the Fostex T50 or T40! And, the HF on the HE-500 is so silky smooth and realistic, that it is simply stunning! While the T50s are amazing in clarity and FR, they don't measure up to the HE-500, and I presume to the HE-6 as well! The spaciousness, and huge sound stage of the HE-500 simply is astounding! Again, I assume your impressions with the HE-6 are just as remarkable, if not more so! Of course, I continue to work on my T40 and T50 by changing the damping, etc. to get the SQ closer to the the HE-500, which serves to me as a model and standard for comparison. As you probably know, I have recabled most of my good headphones with Cardas 4x24. I noticed that your HE-6 have the silver cable, which I also have, and my wife likes, but I prefer the Cardas, which to my ears, gives me a fuller spectrum of sound, as well as silkier HF, and fuller high impact bass. Enjoy! Cheers! Israel
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Post by Deleted on Mar 23, 2013 18:36:41 GMT
I'm tempted Mick!
I don't know what the output power of my AK Class A HA is but I guess it would drive the HE-6 fine.
I love the T50s with the filter, which as Israel and Ian say makes a huge difference, but if these are better again they must be worth a shot.
Syd
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Post by Deleted on Mar 23, 2013 21:28:42 GMT
Hi Syd,
I would thoroughly recommend you try a pr of 500`s or HE6`s if like Israel and myself you like the ortho sound that these produce.
Frans says that the T50`s with filter comes very close to the SQ of both of these. I can`t comment or pass my own judgement on Franses findings, because as yet as i have not heard a filtered pr of T50`s, soon to be rectified i hope.
However, Israel has both, so can give his own opinion. I have great respect for Israels evaluation, he obviously has the same sort of hearing as me, and i think you know how he feels about the comparison, if you read his last post.
If you can`t find a dealer in your local area willing to let you demo either or both of the HiFIMAN`s offerings, PM me and i will ship the whole of my HE6 set up for you to try. After all its a large outlay if they are not to your liking, best be safe than sorry so they say, so i would recommend you take up my offer before purchase. I think you will be most impressed with their performance.
I have considered the Temple Audio Bantam Gold Amp as a driving force for my HE6`s, which is still a probability, i have heard that its ideal for the HE6`s, giving excellent results at under £200 delivered to the UK, its also returnable if not suitable, and its a lot cheaper than i paid for my EF5 Amp (£350).
Mick.
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Post by Deleted on Mar 23, 2013 21:41:42 GMT
Hi, Mick I am not going to say "I told you so!" because you already knew that! I am glad to know you are happy with the filter! My impressions when I finished the filter were identical. As good as the T50RP is, my HiFiMan H-500, and as you so state, the HE-6 win hands down. The bass and midrange on my HE-500 simply can not be matched by the Fostex T50 or T40! And, the HF on the HE-500 is so silky smooth and realistic, that it is simply stunning! While the T50s are amazing in clarity and FR, they don't measure up to the HE-500, and I presume to the HE-6 as well! The spaciousness, and huge sound stage of the HE-500 simply is astounding! Again, I assume your impressions with the HE-6 are just as remarkable, if not more so! Of course, I continue to work on my T40 and T50 by changing the damping, etc. to get the SQ closer to the the HE-500, which serves to me as a model and standard for comparison. As you probably know, I have recabled most of my good headphones with Cardas 4x24. I noticed that your HE-6 have the silver cable, which I also have, and my wife likes, but I prefer the Cardas, which to my ears, gives me a fuller spectrum of sound, as well as silkier HF, and fuller high impact bass. Enjoy! Cheers! Israel Hi Israel, Well you did tell me so!! and you were spot on, we obviously have very similar hearing. I`m sitting here typing with the T50`s playing, driven by my Zigis portable out of my Cowon D2+ (couldn`t do that with the HE6`s), really enjoying them in the same way as i enjoy my Portopro`s. But when i really want to "get in the zone" with whats playing, i will change to the HE6`s now permanently filtered. It just moves the SQ up to another level to my ears, to be honest they did before filtering was applied, now even more so. ATB. Mick.
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Post by Deleted on Mar 23, 2013 22:57:37 GMT
Hi Mick I'm VERY grateful for your offer of a trial of your outfit, amazingly kind but right in character for you, I know. I'm nevertheless very loath to put all that equipment at risk with Royal Mail. I'm content enough to take the word of Israel and yourself, together with the reviews elsewhere I'll post the power output query to Alex, I think if the power handling of the AK Class A is as good as I think, the quality certainly is. Its good to know though that there are reasonably priced alternatives to the HifiMan EF6 which is their latest recommendation for these 'phones. I really do have way too many head amps here already! I'll think about it over the weekend and let you know for sure in a day or two. A little matter of a begging letter to Frans re the filter needed too! One thing for sure, I doubt if any dealer in our local metropolis has these available Did you try their speaker amp converter box? I have a nice rebuilt MF A3 gathering dust that might be nice with them. Syd
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Post by Deleted on Mar 23, 2013 23:28:17 GMT
Well to be quiet Honest Syd, there is no way on earth that i spend that kind of money, solely on recommendations from someone else. I would certainly be guided by reliable appraisal, but would need to form my own opinion first, as HP`s, especially the higher priced models, attract negative as well as positive reviews. I have no problem with my offer, but i would if you spent that sort of money on my recommendation, only to find you don`t like them. Regards Mick. PS Sorry forgot to mention, i have made up a lead that connects directly to my Fatman Amp, no longer used, but gives out i believe 13watts into 8ohms with a very reasonable SQ. The lead connects directly to the speaker terminals on the rear of the Amp, the HP`s connect to the other end (female 6.3mm socket), and all is tickety boo, works just fine with pleasing results. These HP`s are rated up to 40 Watts. Excuse any spelling mistakes, i`m getting tired and i`m also a little dyslexic, but not many people know that. Mick.
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Post by Deleted on Mar 24, 2013 11:03:00 GMT
Hi Mick
That's interesting about your lead, I wonder why they sell a 'box' at $99 to enable a speaker amp to be used, maybe to limit output if its a higher power amp.
You've maybe seen Alexs' mention of the 15W Class A being originally useable for HAs, so that's maybe an idea as I have the bits. Just not keen on adding any more HAs to my collection, as I never get around to selling anything, to make room.
You're really quite right about buying without audition though I've done it many times, mainly because Hifi shops here are in short supply and a bit more Linn orientated or simply don't have much in the way of higher end stuff. I'll PM you later.
Syd
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oldson
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Post by oldson on Mar 24, 2013 16:16:09 GMT
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oldson
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Post by oldson on Apr 9, 2013 18:42:36 GMT
he-500's just sold on ebay for £330 + 15 del. i will have to stop watching these, as it is getting annoying now. having said that, from the things i have read, i may now wait a bit and get lcd-2 rev2 instead.
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