For limiters i use

Way. Mid. High

RMS 29 / 21 volts 1 second attack 4 seconds release

Peak 100/ 72 volts 2 millisecond attack 64 milliseconds release

Above based on 16/16R drivers.

My smallest amp channels are good for 145V peak but anything that can offer clean peaks of 105V or greater will be fine.

this guide should help:

https://www.powersoft.com/wp-content/uploads/2019/01/powersoft_TN009_LimiterSetup_en_v1.0.pdf" rel="nofollow - https://www.powersoft.com/wp-content/uploads/2019/01/powersoft_TN009_LimiterSetup_en_v1.0.pdf

its possible to drive the transducer with a very high voltage (the 1300W figure) without it failing instantly but it will not last long.  To achieve high maximum SPL with signals like M-noise (which has a high crest factor in the HF) it can be beneficial to use amplifiers around 1kW on the compression driver however you need both a peak and an RMS limiter and you may even need an excursion limiter for the low end of the transducer. 

https://m-noise.org/" rel="nofollow - https://m-noise.org/

https://meyersound.com/product/panther/#overview" rel="nofollow - https://meyersound.com/product/panther/#overview (you can see the high power pascal modules in this speaker for the HF and 12" are the same).   

What SPL is the rest of the system capable of generating? The bottom line is you only need enough output from the CD's to produce a balanced sound with the rest of the system and given thier high sensitivity it is entirely possible that requirement could be an almost insignificant amount of power by PA standards. For example if the average SPL of the sound system was 130db the CDs would only need 16w to keep up, but you would use a 160w amplifier to allow 10dB of peak headroom.

kipman725 wrote: worth pointing out that if your operating near the LF limit of 300HZ the horn you will need is massive and you will risk damage operating at high voltages and lower than the horn+driver combo is capable of. An appropriately set -24dB/octave (4th order) high pass filter will protect the driver. You can find where the excursion starts to rapidly increase by performing lower level THD sweeps and finding the point where it starts to increase with decreasing frequency.

Not gonna go that low, but will keep in mind to check that. We're going to use them in the paraflex 2x12" mid/tops crossed around 800hz probably and fitted inside with a line array type waveguide or on top using 18sound xr1464

This makes things easier to get in perspective, thanks. 

We have a stack of 4 x superscoops(Void v18 - 1000w) and 4 x es18(BMS 18S430V2 -1200w) and we're changing the mid/tops to 2 x double 12" paraflex with BMS 12S430-500w as drivers. We'll have to check if this also can keep up with the rest, but at the levels we are usually playing, we didn't have problems in the older boxes and in the new ones they should be louder. 

I figured that with our system the CDs will not have to work very hard as it's not very big and usually we can't play it at 'war' levels anyway, as we kind of lack locations for that around here, but I didn't know much about setting limiters in place and was curious if the amp we have is appropriate for the job headroom wise. 

Conanski wrote: So what amplifier do you already have for the HF section?

Ha.. knew I forgot something :))

We have a Crown XLS 602 that we used with the old CDs and a Matrix STR 3000 that we have as a backup for the mids(powered by another Matrix). This are our options for now to power the 2 x BMS 4594ND 16+16 ohm CDs.  Would appreciate any advice for future upgrades in this department also. If it would make sense to have the same make of amps for mids and highs.. I saw a Matrix STR2400( 2 x 720w at 8ohm) reasonably priced, if the Crown is too small for the task. 

Crown ratings: 

8-ohm Stereo (per channel) 370W

4-ohm Stereo (per channel) 600W

2-ohm Stereo (per channel) 840W

8-ohm Bridge-Mono 1,200W

4-ohm Bridge-Mono 1,680W

*1 kHz Power: refers to maximum average power in watts 

at 1 kHz with 0.5% THD.