10 replies to this topic

[Arkon]

Hello,
I would like to use one of the amplifier belonging to the XLS serie for home usage. I don't need much power, as I have my speakers on the desk, and I only listen at 1 meter (I think that's 3 or 4 feet) from them. I'm mostly interested in sound QUALITY though. Does the XLS 1500 sound better (again, not interested in more watts, as I won't be using them) than the 1000? I see on the web that the 1500 has higher damping factor, and 103SNR compared to the 97SNR of the xls 1000. Please help me choose between the two.
Futher to that, what is the power consumption of the xls 1000 and the xls 1500? Is the 1500 as silent as the xls 1000 if only little power is used? Or does the xls 1500 heat more than the xls 1000 at the same watt usage?

How good is the dsp? Is it a 32bit or 24 bit? As I have an active subwoofer, I plan to use the xls high-pass filter for my speakers, set at 50hz. Will that lower the sound "quality"?

Thank you in advance for all the answers.

[Kevin Heber]

The 1500 has a better (outboard) codec than the 1000, so the noise performance is better.  As far as thermal dissipation, the two amps are basically the same.

The DSP is pretty basic but gets the job done; coeffs are 28-bit and the converters are 24-bit.  

Setting a highpass filter in the DSP isn't going to affect the performance at all.  It's certainly much better than using an external crossover.

[Arkon]

Thank you for your answer, but I fail to understand what "better (outboard) codec" means. Could you please explain it more in detail? I would also like to know if the difference is just this codec, as you say the amps are basically the same. Maybe the xls 1500 has just a more powerful psu that can make better use of the amp section?

[Kevin Heber]

In the case of the XLS1000, the DAC resides within the DSP, while in the case of the XLS1500 – 2500, the DAC is part of a separate Cirrus codec.

The 1500 has various component differences from the 1000 that allow it to squeeze out more power.

[Arkon]

In the case of the XLS1000, the DAC resides within the DSP, while in the case of the XLS1500 – 2500, the DAC is part of a separate Cirrus codec.

The 1500 has various component differences from the 1000 that allow it to squeeze out more power.

Well this was quite exhaustive. Just one last question (I think ^^). How much is power consumption for the xls 1500 (and the xls1000 as you say it's the same)? If you need to know at what power I'd say at 6-8ohm at 50w (as I've mentioned, it's just for home use).

[Kevin Heber]

Power draw & thermal charts for XLS Drivecore amps are attached here.  Hope this has helped!

Attached Files

•  XLSDrivecore_powerdraw_thermal_keh.pdf   17.89K   51 downloads

[Arkon]

Thank you very much   . Stunning values

[spectrumsounddesign]

Hey Kevin,
I noticed that in the Powerdraw PDF you attached doesn't account for bridge-mono mode.  It only accounts for the power consumption with each channel being used as individuals.  I wanted to know what kind of draw we are getting out of these amps in Bride-Mono mode.
Thanks,
-Henry

[dakos]

Hello Henry and welcome,
The power draw for 8 ohm bridge is the same as for 4 ohm stereo, as for 4 ohm bridge it's the same as 2 ohm stereo.
Avi

[ksmalk08]

Kevin Heber, on 06 October 2011 - 01:38 PM, said:

Power draw & thermal charts for XLS Drivecore amps are attached here.  Hope this has helped!

Thank you very much for this info - do you happen to have the full power-draw data for the XTi 2 series?

[dakos]

Go here:
http://www.crownaudi...?showtopic=4408
Scroll down to the XTI section, it's the same as the XTI2.