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Power Ampilfier/Speaker Setup

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Power Ampilfier/Speaker Setup

Postby Neil.Helgeson » Sat Apr 07, 2012 3:59 pm

Hello all! I'm trying to consolidate my rig and I have a power amp question . . . .

I have . . .

2 Community XLT46 Mains - 200W continuous, 500W Program, Nom. Imp. 4 ohms
2 Community XLT55 Subs - 300 W RMS, 750 W program, Nom. Imp. 4 ohms

I have . . .

Samson S2000 Power Amp -
Rated Output Power, per channel (1 kHz, THD 0.1%, Both Ch Drive)
Stereo/Parallel modes
per channel (into 4 ohms) 1020 W
per channel (into 8 ohms) 685 W

Bridged mode
per channel (into 8 ohms) 2025 W

I want to run my system in mono. I want one side of the S2000 to be used for subs and the other side to be used for mains.

Can I do this? Too much power? Too little?

I appreciate any advice and direction!

Thank you!
Neil.Helgeson
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Re: Power Ampilfier/Speaker Setup

Postby Neil.Helgeson » Sat Apr 07, 2012 6:59 pm

Let me ask this, you see what I'm trying to do . . .

1 Power Amp

Left Side - Main 1 - Main 2
Right Side - Sub 1 - Sub 2

Looking at the specs of my speakers, would you be so kind as to recommend a couple of Power Amps that will accomplish this task? From what I can gather, it has to support 2 ohms, because when I run two speakers to a side at 4 ohms nom imp., that takes me down to 2 ohms I believe?

Thank you very much for your help! I greatly appreciate it!
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Re: Power Ampilfier/Speaker Setup

Postby DGL. » Sat Apr 07, 2012 10:49 pm

Not tried these amps myself but a few possible options,

Remember though that although the amps may be able to work at 2 ohms it is not generally the best praptice as it will put a lot of strain on the amp working so lov.

These amps are 2 ohms stable and provide enough power per side a 2 ohms,
http://www.thomann.de/gb/peavey_pvi_2500.htm
http://www.thomann.de/gb/behringer_epx_2000_europower.htm
http://www.thomann.de/gb/peavey_ipr_1600.htm
http://www.thomann.de/gb/crown_xls_1500.htm

The other option would be to go for a multi channel amp such as this,
http://www.thomann.de/gb/the_tamp_d4500.htm
This would give you 500w at 4 ohms and 4 outputs (although at over twice the power of you mains it may be a bit overkill.
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Re: Power Ampilfier/Speaker Setup

Postby DGL. » Sun Apr 08, 2012 8:06 am

Though thinking about it why do you only want 1 amp? You can still run a 2 channel (stereo) amp as a dual mono amp either with settings on the amp and in all cases with a splitter.
The reason why I think that 2 amps would be better is that due to thae fact that your mains are 100w less powerful than your subs means that you aren'r really goling to find an amp that fits yor spec as they all generally will kick out the same power eachy side meaning that for an amp that will have suitable output for the subs the mains will have an amp that is over double their continuious rating which could cause problems if you arn't careful with your levels.

Therefore I would think along the line of this instead,

For the subs, http://www.thomann.de/gb/behringer_epq1200.htm

For the mains, http://www.thomann.de/gb/behringer_inuke_nu1000dsp_amplifier.htm

Thomann also do the smaller 1u europower amps which would give out 2 x 390w and 2 x 230w.
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Re: Power Ampilfier/Speaker Setup

Postby Mike Stranks » Sun Apr 08, 2012 8:06 am

DGL. wrote:The other option would be to go for a multi channel amp such as this,
http://www.thomann.de/gb/the_tamp_d4500.htm
This would give you 500w at 4 ohms and 4 outputs (although at over twice the power of you mains it may be a bit overkill.
Not sure that I understand what you're saying here - and apologies if I've misunderstood - but the standard "rule of thumb" for otput power for amps is 2/2.5 times the rated RMS power of the speakers. That would make the amp you mention almost right in the target zone...

Again, apologies if I've misunderstood your point.

... O/P have you given any thought about crossovers/filtering to help the speakers by giving the subs only the bass to deal with and the tops a 'bass-minus' signal?
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Re: Power Ampilfier/Speaker Setup

Postby DGL. » Sun Apr 08, 2012 8:13 am

I was going for thae fact taht a less experienced user might end up damaging the speakers as they may not know where 200w or so is on the amp and cold be runniong it at 300 without knowing and do some damage.
Thomann reccommend that an amp shoul;d have atleasdt 30% more power than the speakers.

http://www.thomann.de/gb/onlineexpert_140_5.html
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Re: Power Ampilfier/Speaker Setup

Postby Neil.Helgeson » Sun Apr 08, 2012 5:05 pm

Awesome Stuff! Thank you!

I think I'm going to use two power amps . . .

A Samson S1500 for Mains
A Samson S200o for Subs

I'm going to run them in Dual Mono using the "Parallel" switch.

I should be good!

Thank you again for the expert advice!!!!!!!!!!!!!!!
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