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Post by Deleted on Nov 18, 2008 18:37:28 GMT
I stumbled upon these... www.pragmatic1.com/mba.htmDoes anybody have experience/knowledge of them? I had visions of partnering them up to a Jaycar for 'speaker amp project  |
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Post by Deleted on Nov 29, 2008 18:04:27 GMT
Ok, I contacted Pragmatic for pricing on these, nearly fell off my perch! At this point I assume that because they're meant for discreet installations (custom install) a hefty premium is charged? Anyway, I managed to cop hold of a pair cheap, 2nd hand. So at some point (when time permits) I'm going to try slapping a simple power amp together using these, to partner with the Jaycar and some efficient mini monitors (amps 24w/c). If I was really daring the thought of active speakers.....but I'm not. So expect some 12v psu questions, Guys? Hello? Come back  |
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Post by Deleted on Nov 29, 2008 20:40:31 GMT
Class D ? Yuk !
O.K. , I haven't heard Class D, but I really have no inclination to do so. They still haven't got CD right yet with it's sampling, so I have no reason to believe that Class D will be as good as a decent analogue amplifier. At least not in affordable versions.
SandyK
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Post by Deleted on Nov 29, 2008 21:06:31 GMT
 Yeah, I know their bloodline (silicon line?) does not promise much but I was going for compactness. If the final result can out perform the current rig for my PC then I win. If not, ah well, another lesson learned...
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robertkd
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Post by robertkd on Nov 29, 2008 23:40:53 GMT
Yeah, I know their bloodline (silicon line?) does not promise much but I was going for compactness. If the final result can out perform the current rig for my PC then I win. If not, ah well, another lesson learned... Hi Chris, it wouldn't be the same if you didn't get your soldering iron and DMM out  www.41hz.com/that said the better class D offerings should and do rival class A, AB 1 2. the poorer ones mmm don't fair so well  |
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Post by Deleted on Nov 30, 2008 17:09:35 GMT
Robert,
that's an interesting link. Most the designs, being SMT would scare me off as I find I'm squinting hard enough at the smaller hole mount components as it is. (MUCH cheaper than Pragmatic though)
Their hole mount design is too big for my intended use, so I'll get mine (got them VERY cheap) sorted as planned and see what I end up with.
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Post by justinp on Dec 8, 2008 22:15:10 GMT
I'm getting one of the 41Hz Amp6 Basic kits for christmas, will let you know what it's like when I build it up. The reports I've read say they're touching on a decent SET valve amp in quality. Being tiny and 12v they sound ideal for my potential off grid tiny cottage I'm hoping to build next year.
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robertkd
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Post by robertkd on Dec 9, 2008 2:53:33 GMT
I'm getting one of the 41Hz Amp6 Basic kits for christmas, will let you know what it's like when I build it up. The reports I've read say they're touching on a decent SET valve amp in quality. Being tiny and 12v they sound ideal for my potential off grid tiny cottage I'm hoping to build next year. Excellent be interested to hear the results (Eh pun intended ) I find I'm squinting hard enough at the smaller hole mount components as it is. There are holes in the PCB for the leads?? I know what you mean  I have listened to a couple of Class D amps, cheap ones I might add and they sounded pretty good. Heard Car Audio and the better units sound very good indeed. |
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XTRProf
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Post by XTRProf on Dec 18, 2008 6:45:22 GMT
Oh, actually the present SOTA class D is not too bad. My friend is doing for another friend a 5.1 amp for home theatre using class D modules from Hypex. Here's the picture. The result don't know yet as not fully operational yet as evidence from the picture.  So far, I prefer the class A amps. They still have some going for them until the class D improves further. However, given the class D uses switching technology to create the waveform, I think it will be quite an uphill task to better the class A which is the analogue waveform at its purest form. In this sense, I'm on Alex side. However, obviously, when I say it will be musically be better still with class A tube, Alex will be coming after me ............. |
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XTRProf
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Post by XTRProf on Dec 18, 2008 7:00:31 GMT
I stumbled upon these... www.pragmatic1.com/mba.htmDoes anybody have experience/knowledge of them? I had visions of partnering them up to a Jaycar for 'speaker amp project Oh, yar, you didn't mention what's the price for that MBA box. So $ ? |
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Post by Deleted on Dec 18, 2008 7:00:39 GMT
XTRProf
The fact is that a very good Class A or Class AB amplifier can almost do as well using only 2 speakers, as many Surround Sound setups can do using 6 speakers and 6 amplifier sections.
The other advantage is less colouration due to incomplete matching between different sized surround speakers and their cabinets and drivers. A good Class A or Class AB amplifier can effortlessly handle centre channel duties as well, if the 2 stereo speakers have an extended low end. An extrermely low distortion Halcro stereo amplifier, gave a very good surround sound performance at a major exhibition a couple of years ago.
SandyK
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XTRProf
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Post by XTRProf on Dec 18, 2008 7:06:55 GMT
XTRProf The fact is that a very good Class A or Class AB amplifier can almost do as well using only 2 speakers, as many Surround Sound setups can do using 6 speakers and 6 amplifier sections. The other advantage is less colouration due to incomplete matching between different sized surround speakers and their cabinets and drivers. A good Class A or Class AB amplifier can effortlessly handle centre channel duties as well, if the 2 stereo speakers have an extended low end. An extrermely low distortion Halcro stereo amplifier, gave a very good surround sound performance at a major exhibition a couple of years ago. SandyK I concur with you and that's why I'm still using old tehcnology 2 channel. That's for a HT, btw, and doesn't belong to me but to a friend's friend. But I can assure you there's some $$$ value in that box as the Hypex modules, PSUs and the thick Al box are not cheap, especially when it's 5 channels. |
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XTRProf
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Post by XTRProf on Dec 18, 2008 7:12:08 GMT
Sorry everyone, It's 6 channels, my mistake. Silly me as I had already make the same mistake when I spoke with my friend that's a 5 channels HT amp and he ahd corrected me by saying 6.  |
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Post by Deleted on Jan 10, 2009 19:49:39 GMT
Sit down.......... MBA-148 is US 210 each + shipping  ( I nabbed a PAIR of populated boards, of their 24 watters for £25, 2nd hand ) |
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robertkd
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Post by robertkd on Jan 11, 2009 13:03:05 GMT
XTRProf The fact is that a very good Class A or Class AB amplifier can almost do as well using only 2 speakers, as many Surround Sound setups can do using 6 speakers and 6 amplifier sections. The other advantage is less colouration due to incomplete matching between different sized surround speakers and their cabinets and drivers. A good Class A or Class AB amplifier can effortlessly handle centre channel duties as well, if the 2 stereo speakers have an extended low end. An extrermely low distortion Halcro stereo amplifier, gave a very good surround sound performance at a major exhibition a couple of years ago. SandyK Alex I have to take you to task on this, 2.0 is nothing compared to a well executed 5.1 Dolby Digital sound field, sure I thought the same but a few AV receivers ago and I still use my mains L and R with supplemental surrounds and Subs (my mains go down to 30Hz) I gotta say NO WAY! remember dolby is highly processed audio taking advantage of the human hearing so don't expect total SQ but when done correct really makes or if not done correctly breaks a movie and no 2 channel system can do surround.  |
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Post by Deleted on Jan 11, 2009 20:06:15 GMT
Robert
I was generalising. The average surround sound sytem is all effects and very little accuracy.More geared for explosions etc. ,and CENTRE dialogue,but piss poor for reproducing satisfying music encoded in Surround Sound.
Before changing addresses, I had a surround sound system with 5 separate Class A modules for amplification. A "Queen" DVD with DTS encoding was absolutely stunning.
However for most material it just wasn't worth the effort of setting up the gear for 5.1.
Alex
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Yeah, I know their bloodline (silicon line?) does not promise much but I was going for compactness.
