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Class D Switching Power Amplifiers and Power D/A conversion

CROWN XLS 1502 or 2502?
CROWN XLS 1502 or 2502?
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Old 25th October 2019, 09:14 AM   #1
m4x is offline m4x
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Default CROWN XLS 1502 or 2502?

Hi

I've a pair of B&W 683S2 and are looking for stronger amp to drive them. I've read alot of good stuff about people using the CROWN amps XLS series in their home theater.

What would be the best match for my 683S2:

SPEAKER SPECIFICATIONS:
• Sensitivity: 89dB/2.83V/m.
• Harmonic distortion (second and third harmonics, 90dB, 1m): <1.0%, 95Hz–22kHz; <0.5%, 120Hz–20kHz.
• Impedance: 8 ohms nominal, 3 ohms minimum.
• Recommended amplification: 25–200W into 8 ohms on unclipped program.

► AMPLIFIER OPTION 1: CROWN XLS 1502
• Class D
• Power rating: 2x 775 W/ 2 Ohm, 2x 525 Watt/ 4 Ohm, 2x 300 W/ 8 Ohm, bridged 1x 1550 W/ 4 Ohm, bridged 1x 1050 W/ 8 Ohm
• 24 dB Linkwitz Riley crossover
• Input sensitivity 1.4 or 0.775 V

► AMPLIFIER OPTION 2: CROWN XLS 2502
• Class D
• Power: 2x 1200 W / 2 Ohm, 2x 775 W / 4 Ohm, 2x 440 W / 8 Ohm, bridged 1x 2400 W / 4 Ohm, bridged 1x 1550 W / 8 Ohm
• 24 dB Linkwitz-Riley crossover
• Input sensitivity 1.4 or 0,775 V

Both amps are specified to go well above the recommendation 200W. Will the 2x440W do a better jobb than 2x300W? Is it worth the 200$ extra?
I'm not technical at all.
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Old 25th October 2019, 11:22 AM   #2
schiirrn is offline schiirrn  Germany
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Hi! The 1502 has enough power. You don't necessarily need the built in DSP. It could be handy for room corrections, but if you are not the technical type this might rather be an option for desaster.


FWIW: I am using a Crown XTi on my subwoofer and have used it full range as well and found it lacking a bit of "audiophile" qualities. Seeing that the XTi and XLS series are in the same price range maybe they "sound the same"? Maybe it's worth looking into another option without DSP that might give you a higher quality amplifier section for the same money.
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Old 25th October 2019, 01:21 PM   #3
YSDR is offline YSDR  Hungary
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I used an XLS1502 for my passive speakers. Imo it's have more than enough power for that B&W. Yeah, the sound quality may not what you seek, try it before you buy. The XLS DSP is very basic, not even capable of room correction, only very basic crossover function with LR4 slopes only.
Ahh, in my setup, the RCA input was totally noisy, the XLR was good.
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Old 26th October 2019, 08:29 PM   #4
Eva is offline Eva  Spain
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Find out if it has thermostatic control on FAN. Many professional amplifiers run the fans loud even at low volume. Although diy modification of some for quiet operation at low volume has been documented.
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Old 26th October 2019, 10:38 PM   #5
YSDR is offline YSDR  Hungary
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Quote:
Originally Posted by Eva View Post
Find out if it has thermostatic control on FAN. Many professional amplifiers run the fans loud even at low volume.
The XLS fans are very quiet, at least in my experience. But that quietness is not usual amongst the pro amps in general.
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