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Author Topic: Comparing amp specs - gain  (Read 898 times)

Rob Spence

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Comparing amp specs - gain
« on: September 16, 2015, 12:19:23 pm »

So, I am feeling math challenged this morning despite the coffee so am asking for some help.

I drive my QRX212 HF (bi-amped) with one channel of a QSC PLX1602.
I have my DSP set up for this.

I need 2 more channels of amp in the rack with no available space.
I am considering the Behringer 4 ch amp as a solution but am trying to figure out the DSP gain changes I need to make for the substitution.

The specs as I could find them...

The PLX1602
Voltage gain = 40x (32dB)

Input sensitivity, V RMS
Full rated power at 8 ohms = 1.2v (+3.9 dBu) = 300w
Full rated power at 4 ohms = 1.1v (+3.2 dBu) = 500w

The INuke NU4-6000 (4 ch mono mode)
Max rated power at 8 ohms = 440w
Max rated power at 4 ohms = 860w

Input sensitivity for rated power into 4 ohms = 0.775 V (0 dBu)

Any help would be appreciated.  Thanks.

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rob at lynxaudioservices dot com

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John Roberts {JR}

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Re: Comparing amp specs - gain
« Reply #1 on: September 16, 2015, 01:13:32 pm »

I already answered you on another forum

short answer is

58.65/0.775=75.67x or 37.57dB

JR
« Last Edit: September 16, 2015, 01:53:31 pm by John Roberts {JR} »
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Re: Comparing amp specs - gain
« Reply #1 on: September 16, 2015, 01:13:32 pm »


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