0 Members and 1 Guest are viewing this topic. Read 189335 times.
I've got 3 different class D amps, so I thought I'd give my impressions. I've got the Crown XLS 1500, and I bought it to use for my band practice PA. It works ok for that. For the heck of it, I decided to try it in my living room with my Pass Labs pre, and SP Tech Timepiece 3.0 speakers. My speakers are currently driven by a pair of Channel Islands D200 amps which sound absolutely wonderful. The Crown? It just plain sucked - really bright and edgy. I then hooked up the Crown to a pair of Tannoy PBM 6.5 monitors in my studio and it sounded just fine. I've also got a Class D Audio SDS-470CS and it is probably 93% of what the D200 amps are. Just a hair shy in the lows, but I wouldn't notice it if I didn't have the D200's. I've got the SDS powering a pair of ATC SCM-20SL in my studio and it kicks butt. I highly recommend the Class D Audio amps. For the money, it's a no-brainer. As for the Crown, it's worth trying with your speakers. Lots of places ship it free and you can always send it back (on your dime). It's lightweight, so the return shipping cost is worth the price of the audition.
That's at rated output, I'm sure its lower below those power figures and it does include the 2 ohm rating power output, .5 thd at full power into 2 ohm, is not bad and better than a lot of rated amplfiers, we would know more if we had it's full distortion spectra , say at 1/5/10 watt output, this affects home user more than full power specs.Look at the 14B at 2 ohm @ rated output..... opps dats right , there is no 2 ohm rating , because it's power into 2 ohm is actually less than 4 and it's distortion exceeds 1% in matching it's 8 ohm rating ... So much for specs huh ....
I guess specs won'mean much if you can't read the graph right. This is ThD vs output power graph. It only tells you how the distortion tracks vs power.
I'm tempted to be on the tour, but I don't want to send it back out the way it came in.
I have two more used 1500's coming I this week, I will send one to Salis. I also have two 2500's on the way. The 2500 might have more room to mod, it is two inches deeper. I hit the jackpot, yesterday on Craigslist the 2500's were 200 bucks each, 1500's were 135 bucks each. The more used ones I buy, the bigger my rolaity check is from Crown.
The Crown is designed for use in a PA application. Can one use it for home audio? Yes. Is it optimal? I think not.Check out these specs: (120 watt SS Amp) I would argue that for most home applications, it's enough power. Plus, it's flat from 20-20KHz.Amplifier section Output Impedance (20 Hz - 20 kHz)< 0,01 ohmRCA (single) input impedance 220 kohmXLR (balanced) input impedance 110 kohmInput sensitivity for rated output1 VMax. peak current> 100 ATHD (measured at 1 kHz -1 dB, 8 W)< 0,002 %Noise (measured with both inputs shorted)400 Hz - 30 kHz : 90 µV 10 Hz - 30 kHz : 100 µVRated output power 8 ohms 2 x 120 W4 ohms 2 x 200 W2 ohms 2 x 350 W]
Some Class D amps (such as the Yamaha MX-D1) incorporates digital filtering as part of its topology.
0 on Craigslist in my region...
It's an analog PWM amp. There is no digital filtering.
Freo-1,Good, bad or indifferent I'll write up what I think. I'm not expecting too much but I'm always willing to be proven wrong!The only Class D amp I've heard here (other than subwoofer amps) was kind of a dog and one manufacturer I wrote to about doing a short write up on a demo unit vanished...However, if the Crown unit can work the magic I'll buy one for the upstairs system and if it bites I won't.For what it's worth, the moldy oldies here (Carver, Bryston and Hafler) are all fine with MMGs but bite when they're paired with 1.7s or 3.7s.
Incorrect. Read up on the Yamaha MX-D1. It does indeed employ digital filtering.
...except a Bryston 4B-SST which cost almost 10 times more.
Amazon customer or not, the Crown certainly doesn't outshine my SDS. You can just see it under the console.
Dats some serious Irony ...........
