BASS LINE

I posted this elsewhere but it was a bit off topic so thought I’d give it its own thread:

QUESTION 1)

Given what the rest of my Sound consists of what would be a good range/rating and amount of Bass Speakers to add in my line, below the following:

HIGH/HORNS:

X2 Peavey RX22 

Frequency Response: 650 Hz to 20,000 Hz

Recommended Crossover: 1200 Hz at 12 dB / Octave

Lowest Recommended Crossover: 1000 Hz at 12 dB / Octave

Sensitivity: 107 dB / 1W 1m

https://peavey.com/rx-22-ct-driver/p/03616190

UPPER MIDS:

x4 Jamo 12”

-Power handling (nominal/music power): 150 / 265 W

-Efficiency: 95.2 dB (1W/1m)

-Frequency response: 48 - 20'000 Hz

-Transitional ranges: 1'800 / 4'800 Hz

-Impedance: 8 Ohm

https://hifi-wiki.com/index.php/Jamo_D_265

LOW MIDS:

x4 15” Peavey Black Widow 

(1508-4 SPS BWX SPKR 4ohm)

Usable freq. range: 40 Hz ~ 2 kHz

Sensitivity: 97.5 dB / 1 W 1 m

They are 500w continuous/1000w program/2000w peak.

https://peavey.com/black-widow-1508-4-sps-bwx-speaker/p/00560140

QUESTION 2)

LUCASDUDE Wrote:

“If you intend just to plonk a load of boxes in one spot, then you don't need to worry about stereo. A single stack will be in mono, so the HF and MF sections can be driven by just a single amp channel each. So the minimum number of amp channels required for an active 3 way mono system is 3, for an active 3 way stereo system is 5 ( bass frequencies are omnidirectional, so they don't need to be run in stereo).”

So after re-reading this by LUCASADE , I’m writing to double check how many outs I need?

I’m currently planning my stack so I can run it in Stereo, x2 stacks if needed:

Left: x1 High/x2 Upper Mid/x2 Lower Mid/Bass yet to add?

Right: x1 High/x2 Upper Mid/x2 Lower Mid/Bass yet to add?

I will eventually add x2 Bass L&R and an Amp to run them. My DSP has x8 outs (so as it stands I’m using x3 amps, x6 outs)

But after reading the above about bass being omnidirectional and not needing to be run in stereo, I’m just checking my last outs 7&8 will be sufficient to run my x4 18” Bass via to the x2 channels on 4th amp to the last x2 outs?

Just so I understand correctly, are you intending to use just the 12" woofers from Jamo D266 cabinets as upper midrange drivers, or are you using the complete speakers? You've listed the frequency range of the complete speaker.

for that frequency band, I think the Celestion G12s you have will sound a lot better.

Conanski was most likely using his G15s for full range use. If you intend to cross over your upper mids at over 2k or so then the G12s will be more suitable than the Jamos. Those woofers are for low frequency use, and the D266 passive crossovers only allow them to function below 1.8k.

No the G15s were used as low-mids. The problem is the cones in these things are relatively fragile and the VC is very short, they are designed as guitar speakers and as such go non-linear(distort) at relatively low power levels, this adds desirable(for a guitarist) color or warmth to the sound but that is exactly what a PA speaker should not do. But besides that they just didn't handle much power.. the rating is very honest and the voice coils burned when powered at only 200w while similar spec PA drivers just kept on trucking. 

Thanks, most Bass speakers I’ve looked at are obviously capable of 35-80hz. Given what I have then is there a certain wattage I should go for? It’s nice to have a symmetrical configuration to the stack but could I have x2 of higher wattage driver instead of x4 of a lower wattage if mounted in a certain box, how does it work or translate to my stack?

Edited by SnailSpace - 20 March 2023 at 4:06pm