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PostPosted: Tue Jul 05, 2016 4:16 pm 
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Joined: Mon Apr 26, 2004 2:33 pm
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Location: Toronto, ON, CA
RoyHifi wrote:
It's looking like class d amplifiers are really starting to take hold in the Audiophile world. For myself, I need a break from my tube amp. I'm now needing a high powered compact amp. Class d seems promising? If you have had experience with class d amps I would very appreciate your insight.

Also, what makes are out there? Can any be purchased here in TO?



For a high-powered, compact Class D amplifier, see my CAM thread on the Lab-Gruppen IPD2400. To me, it compares favourably, for example, with the Bryston 4B-SST2. In other words, you can do better, but it's still a very high quality amplifier.

Power Rating: 600/1200/800 Wpc @ 8/4/2 ohms
Size: 19" Wide, 1.75" High, 12 lbs. weight
Extra features: Complete crossover and equalization module built-in, controllable with free software for Mac or PC.
I/O: Balanced XLR inputs (both analogue and digital); binding post and Speakon outputs. Note: no RCA inputs
Fans: As do most pro audio designs, the IPD series amps are fan-cooled, but thus far I have never actually been able to hear them!

I purchased mine from an eBay reseller for around US$1200 plus exchange (ouch!), shipping, and sales tax.

There is also the IPD1200, exactly the same but with half the power rating. However, it doesn't seem to be significantly cheaper.

Hope this helps.

I'm sure Lab-Gruppen products are available in Toronto, as the company is a major player in professional audio, but I don't know if Canadian prices would be comparable to what's available out of the USA, where the market is so much larger and more competitive.


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PostPosted: Tue Jul 05, 2016 4:30 pm 
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Location: Burlington, ON, CA
Very happy with my Crown XLS 1500 running my Maggie's.

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PostPosted: Tue Jul 05, 2016 4:42 pm 
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Location: Not Toronto, ON, CA
mcgsxr wrote:
Very happy with my Crown XLS 1500 running my Maggie's.


Had to zoom in... thought you were someone else... he's takin forever to hook his up to his mags :lol:

In regards to the topic:

I have a $12 amp board off eBay running off an XBox 360 power supply and have no complaints. Sure its not the best sound, but I've heard worse.

Class D can sound sweet if done right and enough people out there are very happy with the results. For the price and power, Class D is worth trying out... certainly won't break your back hauling it about ;)

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PostPosted: Tue Jul 05, 2016 5:31 pm 
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Roy, here's a current discussion about driving Magnepans, particularly the Tympani, with Crown amps.

http://www.audioasylum.com/cgi/vt.mpl?f=mug&m=220377

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PostPosted: Tue Jul 05, 2016 5:31 pm 
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Location: Calgary, AB, CA
mcgsxr wrote:
Very happy with my Crown XLS 1500 running my Maggie's.


If you like the Crown amp's sound you'd enjoy the Crown K2. You can buy them quite cheap at the used markets these days for 1/3 of its original MSRP of $3,000 new. Not only they sound good, but they're also very quiet while doing it as it doesn't have a fan.


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PostPosted: Tue Jul 05, 2016 6:01 pm 
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Location: Surrey , BC, CA
back to class D...do not forget the beauty of Kharma MP 150 monos....


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PostPosted: Tue Jul 05, 2016 6:20 pm 
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Location: Golden Triangle, ON, CA
libor wrote:
back to class D...do not forget the beauty of Kharma MP 150 monos....



Those are the amps that made me sit in amazement how good they really are.
I was never much impressed at what class D amps could do till a friend got a
pair of Kharmas ........................................


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PostPosted: Tue Jul 05, 2016 6:23 pm 
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Location: Thornhill, ON, CA
I was a happy owner of NAD C390DD. It produces a very refined and dynamic sound if you feed it with clean power and have a reasonably efficient speakers. Then I upgraded my speakers and decided to upgrade my amp. I purchased a pair of bel canto mono blocks (ref1000mk2) and I'm very happy. They are compact, have a lot of power, run very cool and produce a truly audiophile sound. Now I'm using my NAD as a preamp.

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PostPosted: Tue Jul 05, 2016 7:56 pm 
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Location: London, ON, CA
BKSRT8 wrote:
Is a class d gonna keep up with an A or A/B in resolution and detail?

I cant imagine trading in a good tube amp for a class d...or are the current class d amps really that good?



Yes

-- 06 Jul 2016 03:58 --

How about Wyred4Sound or Primare.... They are exemplary amps by any measure subjectively or objectively

Bad class D was over years ago...


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PostPosted: Tue Jul 05, 2016 8:02 pm 
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ADCO wrote:
BKSRT8 wrote:


I cant imagine trading in a good tube amp for a class d...or are the current class d amps really that good?



Yes



This is one I always found tricky to give the truth to the guy asking.

The attributes to his specific tube amps sound , maybe absolutely not
for an owner of brand A and absolutely yes for owner of brand B.
New tube sound , vintage tube sound, heavier midrange bloom , and so on.


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PostPosted: Tue Jul 05, 2016 8:16 pm 
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Location: Chilliwack, BC, CA
I have done a lot of research on Class D

Class D Audio are by far the cheapest, I bought a SDS-470C with the upgraded PS

http://www.classdaudio.com/


Next would be D Sonic, a little more money, but the latest technology modules

http://www.d-sonic.net/


Then maybe Red Dragon, they use older ice modules, but one of their amp modules is newer tech stuff

http://www.reddragonaudio.com/


The Audiogon forums has some good reads on the various Class D makers


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PostPosted: Tue Jul 05, 2016 8:40 pm 
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years ago my first class D was little Trend and Klipsch La Scala...that was an excellent match actually! Even better then tubes and La Scala...


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PostPosted: Tue Jul 05, 2016 9:50 pm 
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Location: Warman, SK, CA
The original Bel Canto REF 1000s were the first class D amps used with my various Maggies ( MG 2.6, 3.6, 3.7, Tympani IVa).
They drove all of these with ease producing great bass articulation, full bodied midrange, and pleasing but slightly dry
high frequencies with the true ribbon tweeters. The only comparably priced Class AB amp I compared them with was the
Bryston 4B SST and to my ears the Bel Cantos were more satisfying.

Two years ago, after reading several rave reviews on the newer Class D designs- Hypex, Pascal, and Anaview, I tried out the D Sonic
monoblocks using the Anaview modules. They are extremely quick, detailed, and have a more extended and natural
treble- think sweeter and more liquid. Bass is at least the equal of the older ICE amps.

Here is a link to a great review of a D-Sonic amp using a Pascal module:
http://www.6moons.com/audioreviews/dsonic/1.html

Hypex-based reviews are quite positive and numerous. IMO the biggest issue with Class D is auditioning prior to purchase
since many of the companies are internet only.


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PostPosted: Wed Jul 06, 2016 2:39 am 
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BKSRT8 wrote:
Is a class d gonna keep up with an A or A/B in resolution and detail?

I cant imagine trading in a good tube amp for a class d...or are the current class d amps really that good?


I tend to agree - Class D amps - including the pricey ones always come across as rather lifeless and devoid of nuance and colour. After hearing Bel Canto and NAD's new stuff - my feeling hasn't really changed going back when I first heard Bel Canto. I didn't realize Rowland was class D - but it explains what I heard.

There is a guy on another forum raving about the TPA 3116 chip though saying this is THE class D amp chip and that it is the best sound available and that he sold his 2A3 SET and other SET amps and dumped his big Classe amps and says the audio press isn't covering it because it will take out their livelihood. Most of these Class D amps are well under $200 and up to something like 60 watts.

Conspiracy nut? Maybe but the price might be low enough for you to take a flier on.

256 pages of posts about it on AK - almost as bad as me with Audio Note :wink: (almost)

http://audiokarma.org/forums/index.php? ... hs.574806/

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PostPosted: Wed Jul 06, 2016 3:39 am 
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Location: Burlington, ON, CA
Audio Research also made a Class D variant.

Agree listening useful for decision making. PM sent to the OP.

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