• TalkBass has been independent since 1998. Add your voice.
    Create a free account to reply to discussions, view embedded media, and browse with fewer display ads.
    Join free Log in
    Want zero display ads or expanded classifieds tools? Compare plans.

Crown XLS1500 Power Amp

#23
Stranger Danger said:
So if I want to run one 4 ohm cab from one preamp source, the only way to do that is in stereo mode or bridge? (I can't do bridge because its too much power.)
Click to expand...
Stereo mode. that amp is not rated for 4 ohms bridged, and evenif it was, it's probably way too much power in the event you had a lapse of good judgement at a loud gig.
 
  • Like
Reactions: svtb15
#24
Just got some info from Crown:

Me:

I am using the XLS 2000 as a bass guitar amplifier. I have a tube preamp and two 4 ohm cabs. I know that I can use input Y crossover filter bypass to run both cabs simultaneously from one source (my Preamp). I want to know how to set the amp properly to use only one of the cabs. Each cab is rated at 4 ohms and 600 watts. Also I am not super tech savvy so please speak in simple terms if you can! Thanks!

Them:

Good afternoon

If you are only running one cabinet, then you only need to use one channel. You can leave channel 2 with no speakers attached with no problems.

Thanks,

Kevin
 
#26
It appears that Crown has revised these specs as the original documentation does not include 4 ohm bridged operation.

It's also entirely possible that the change in ratings reflects revisions in UL evaluations.

This is kind of a problem with technology in any fast moving, detail oriented industry. Changes that happen, especially running changes, are often missed by applications guys. I've been on the receiving end both with added and subtracted features, especially software based.
 
  • Like
Reactions: S-Bigbottom, StrangerDanger and JACink
#27
Does anyone know if the 1/4" input and the XLR input on a channel are directly connected or do they go through summing amps? I suspect the former but I'm not sure, even after looking at the service manual. My desirement is to connect the XLR output of my Sansamp RBI to the XLR input of the channel and the 1/4" output of the RBI to an (fDeck) HPF then to the 1/4" input of the same channel. The intent is be able to go from no HPF to HPF on the fly if it becomes apparent I need it in the room, by dialing down one RBI knob and dialing up the other. Not mixing, just switching signal source without stopping to break and make cable connections.
 
#28
kartiste said:
Does anyone know if the 1/4" input and the XLR input on a channel are directly connected or do they go through summing amps? I suspect the former but I'm not sure, even after looking at the service manual. My desirement is to connect the XLR output of my Sansamp RBI to the XLR input of the channel and the 1/4" output of the RBI to an (fDeck) HPF then to the 1/4" input of the same channel. The intent is be able to go from no HPF to HPF on the fly if it becomes apparent I need it in the room, by dialing down one RBI knob and dialing up the other. Not mixing, just switching signal source without stopping to break and make cable connections.
Click to expand...
I believe the tip connects to pin 2 and the ring to pin 3, sleeve to pin 1 on the XLS series.

That said, what you are proposing is not a good idea for 2 reasons. The first being that you have 2 low impedance devices driving each other's output stages which is certain to increase distortion as well as decrease operating levels, and the second being that the 1/4" unbalanced input will effectively short pin 3 to ground. It's not good to mix balanced and unbalanced in this way.

Why not just leave the HPF in the path and slide the frequency up when and as needed?
 
#29
warnergt said:
The Crown XLS offers amp modes of:
1) Bridge ("Input Y" is implied)
2) Input Y
3) Stereo

After that, you get to choose type of hi-pass, low-pass or none:
A) Hi-pass
B) Low-pass
C) Crossover (one channel gets hi-pass; one channel gets low-pass)
D) Bypass (hi-pass and low-pass filters are not used)
Click to expand...
Yep, plenty of options on new amps. It can do anything you want if you know what to tell it.
 
#30
agedhorse said:
I believe the tip connects to pin 2 and the ring to pin 3, sleeve to pin 1 on the XLS series.

That said, what you are proposing is not a good idea for 2 reasons. The first being that you have 2 low impedance devices driving each other's output stages which is certain to increase distortion as well as decrease operating levels, and the second being that the 1/4" unbalanced input will effectively short pin 3 to ground. It's not good to mix balanced and unbalanced in this way.

Why not just leave the HPF in the path and slide the frequency up when and as needed?
Click to expand...
Thanks - what I needed to know. It was just a matter of convenience possibilities and where I stash the box. I don't like stuff on the floor.
 
  • Like
Reactions: agedhorse
#31
agedhorse said:
It appears that Crown has revised these specs as the original documentation does not include 4 ohm bridged operation.

It's also entirely possible that the change in ratings reflects revisions in UL evaluations.

This is kind of a problem with technology in any fast moving, detail oriented industry. Changes that happen, especially running changes, are often missed by applications guys. I've been on the receiving end both with added and subtracted features, especially software based.
Click to expand...
I received 400 VDC due to an undocumented change. Scated the hell out of the lab rats.
 

Latest posts

Top Bottom
Back