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Post by razrr1275 on Feb 19, 2014 19:04:14 GMT
Class D are usually balanced out, meaning one cannot connect the 2 '-' outputs together. Maybe in this design one can if they made the - a virtual ground, but is unlikely. When each driver is connected to each amp section it will also be no problem but one cannot use the 3 pin jack. A well designed class-D (T) amp can sound excellent indeed. Once again you're correct - the out is balanced - I had to get a cable for the 650s terminated in 4 pin XLR and then an XLR to speaker taps adapter to use it. |
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Post by musicman1806 on Feb 19, 2014 22:19:26 GMT
Thanks for the those links Fran's , I forgot about that page. I compared my family audio receiver with that handy chart and at 130 watts per channel ,I should still keep my HE 500 away from it. Though I have a sunrise 2, I recently ordered an Ember.
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Post by tdubl07 on Feb 21, 2014 15:39:29 GMT
Hey guys, just got my project ember in the mail from Jeremy last night, and couldn't wait to put it together. So got started right away and had her put together in a smidge under 4 hours. Went together smoothly and fired up without a hitch. Man does this thing have some headroom. Just using the stock tube on low gain right now with some dt 990 pros and he-400's and they sound great. It'll be fun to do some tube rolling as soon as I get a chance. Big thanks to SolderDude and Jeremy for this kit. Great customer service and just a real treat to build. Here's a couple pics I shot last night just before bed. Attachments:
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solderdude
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Post by solderdude on Feb 21, 2014 15:43:35 GMT
Nicely done and welcome to the forum !
I see a lot of people set the tube LED colour to orange.
Have mine set in the same colour as well.
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Post by tdubl07 on Feb 21, 2014 15:47:06 GMT
Nicely done and welcome to the forum ! I see a lot of people set the tube LED colour to orange. Have mine set in the same colour as well. Haha, yeah, think it just adds to the natural tube glow. Very cool kit solderdude, much appreciated. I'll probably have to try out the powersupply and SS amp when you guys release it. |
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Post by idgit on Feb 21, 2014 17:28:49 GMT
How does the Ember do with those low impendance high sensitivity headphones? I see a couple of guys on here have Denons.
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Rabbit
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Post by Rabbit on Feb 21, 2014 18:11:00 GMT
Hi,
welcome to DIYAH. You certainly brought a 'glow' to the forum!! I really like the Ember enormously. It's become the only amp I use really nowadays and I have quite a few others. I need to have a clean out really.
I also use a dt990 with it amongst others. It's a great combo.
Ian
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Post by itsalive on Feb 21, 2014 20:23:43 GMT
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idjit
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Post by idjit on Feb 22, 2014 0:23:33 GMT
Hi, welcome to DIYAH. You certainly brought a 'glow' to the forum!! I really like the Ember enormously. It's become the only amp I use really nowadays and I have quite a few others. I need to have a clean out really. I also use a dt990 with it amongst others. It's a great combo. Ian Thanks Ian, I guess what I was really shooting for in a round about way was if the Ember would be a decent match for the Fostex TH-600, which has comparable stats to the Denon AH-D7000. Was a bit concerned about hum at 25 ohms. Jack |
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Rabbit
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Post by Rabbit on Feb 22, 2014 7:29:44 GMT
I don't get hum with my Denon D2000. The 7000 is one that I always hummed and aaaah'd about. Always fancied getting one since I do really quite like the 2000 and then all of a sudden, they were no more so my mind was made up for me.
The new Denons, (all of which I have heard)don't seem to be as good as the older ones. It would be nice if Denon went back to the old family of headphones.
Hearing the new ones has put me off Denon headphones big time, but the old ones are also very nice with the Ember.
I have mine set on a light blue colour so it's really obvious that it's switched on. better than an on/off light actually because it's more obvious!!
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solderdude
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Post by solderdude on Feb 22, 2014 8:23:15 GMT
I guess what I was really shooting for in a round about way was if the Ember would be a decent match for the Fostex TH-600, which has comparable stats to the Denon AH-D7000. Was a bit concerned about hum at 25 ohms. Jack The Ember can deliver about 0.7w into 25 Ohm. 25 Ohm is not 'low' for Ember. The TH600 is rated for 1.8W so cannot be blown up by the amp. It will be able to reach 125dB which is 'pain level' SPL that one can only tolerate shortly. The TH600 has 'normal' sensitivity but because it is 25 Ohm needs very little voltage to operate. Some tube types may show a low level audible hiss but most recommended tubes won't. Whether or not you can hear a low level hum will depend on WHERE the amp is placed. When it is placed upon or very near a transformer or WiFi antenna/dect phone or depending on other connected equipment making ground loops you may or may not get some 'interference' as it is an open frame design (no shielding from a metal enclosure). Under normal circumstances you should not hear a hum or noise or anything. Good thing is the impedance is quite flat so when set to 'medium' it won't affect SQ but the 'background' issues will be attenuated by 7dB without sacrificing the headroom of the amp. On 'high' setting the background noises are reduced by 15dB and the bass level is increased by 0.6dB (which is inaudible to most) and headroom will be 'limited' to 120dB as max 0.2W is available in that setting. In other words... there should be no hum or noise with these headphones and cannot be blown up while having loads of headroom. The Ember has been reported to go well with Dx000. |
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idjit
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Post by idjit on Feb 22, 2014 16:36:10 GMT
I guess what I was really shooting for in a round about way was if the Ember would be a decent match for the Fostex TH-600, which has comparable stats to the Denon AH-D7000. Was a bit concerned about hum at 25 ohms. Jack The Ember can deliver about 0.7w into 25 Ohm. 25 Ohm is not 'low' for Ember. The TH600 is rated for 1.8W so cannot be blown up by the amp. It will be able to reach 125dB which is 'pain level' SPL that one can only tolerate shortly. The TH600 has 'normal' sensitivity but because it is 25 Ohm needs very little voltage to operate. Some tube types may show a low level audible hiss but most recommended tubes won't. Whether or not you can hear a low level hum will depend on WHERE the amp is placed. When it is placed upon or very near a transformer or WiFi antenna/dect phone or depending on other connected equipment making ground loops you may or may not get some 'interference' as it is an open frame design (no shielding from a metal enclosure). Under normal circumstances you should not hear a hum or noise or anything. Good thing is the impedance is quite flat so when set to 'medium' it won't affect SQ but the 'background' issues will be attenuated by 7dB without sacrificing the headroom of the amp. On 'high' setting the background noises are reduced by 15dB and the bass level is increased by 0.6dB (which is inaudible to most) and headroom will be 'limited' to 120dB as max 0.2W is available in that setting. In other words... there should be no hum or noise with these headphones and cannot be blown up while having loads of headroom. The Ember has been reported to go well with Dx000. Thanks for this. A nice clear concise answer straight from the source is a rare thing. Jack |
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idjit
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Post by idjit on Feb 22, 2014 16:43:16 GMT
I don't get hum with my Denon D2000. The 7000 is one that I always hummed and aaaah'd about. Always fancied getting one since I do really quite like the 2000 and then all of a sudden, they were no more so my mind was made up for me. The new Denons, (all of which I have heard)don't seem to be as good as the older ones. It would be nice if Denon went back to the old family of headphones. Hearing the new ones has put me off Denon headphones big time, but the old ones are also very nice with the Ember. I have mine set on a light blue colour so it's really obvious that it's switched on. better than an on/off light actually because it's more obvious!! The Fostex TH600/900 may be a more natural successor to the old Denon line, so this was the answer I was shooting for thanks. Jack |
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Rabbit
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Post by Rabbit on Feb 22, 2014 17:07:09 GMT
That's what I thought you were getting at!! Those kinds of headphone are prone to buzz and hiss being so sensitive. If anything, I would switch the Ember to the middle setting (38 ohms). I have bat's hearing and there will be a tiny amount of hiss at zero from some tubes. If you get it, the 38 ohm setting will put it to rest without changing its sound. If you want to lower the sensitivity, then tbh, 100 ohms is absolutely fine but some think that the sound alters. It's tiny. I would use 100 if you still detect tube noise. I get tube noise from X-Cans on low impedance headphones so given the power of the Ember, it's actually better in this respect, but those kinds of headphone impedances are almost 'asking' for noise really!!  You will find the vol pot a bit jumpy. I changed mine for a bigger one which gives slightly better sensitivity to your touch. It's easier to control with a bigger volume knob. |
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Post by jhelms on Feb 23, 2014 21:01:37 GMT
Very cool - Checking it out! |
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