Denon AVR4000 preout to NuPrime AMG Sta

[stinga]

Hi guys, I have a question for the brains trust et al

I am considering upgrading my AVR and wonder if I have an issue with the gain of my amps, could you pls advise if there is a problem as I do not understand the correlation between gain and sensitivity?

X4000 pre out for L/R channels via RCA to 2 NuPrime AMG Sta amps in mono (1 amp per channel)
NuPrime specs are below:

• Stereo Power: 2 X 130W @ 8 Ohm & 2 X 200W @ 4 Ohm
• Mono Power: 300W @ 8 Ohm & 320W @ 4 Ohm
• Rated / Peak Current: 10A / 15A
• Gain : 26 (stereo) & 52 (mono)
• Signal to Noise Ratio : 100 dB @ 10W
• THD+N : 0.006
• Frequency Response : 10Hz~50K Hz +-0.2dB @ 8 Ohm. 58K Hz @ -3dB
• Input Impedance: 1M Ohm
• Sensitivity: 1.2 Vrms @ Stereo; 0.95 Vrms @ Mono

Many thanks
Al

 

[lovinthehd]

26dB of gain is reasonable....and think the avr pre-outs will be fine with them amp.

 

[stinga]

Yes, but as I run in mono gain is 52 with a sensitivity of 0.95 Vrms.
I thought sensitivity was the input voltage required for full power as supplied by the pre out but now I am not sure whats what

 

[lovinthehd]

Yes, but as I run in mono gain is 52 with a sensitivity of 0.95 Vrms.
I thought sensitivity was the input voltage required for full power as supplied by the pre out but now I am not sure whats what

You set the sound mode to mono then run dual mono speakers? What kind of content do you listen to?

 

[TLS Guy]

Hi guys, I have a question for the brains trust et al

I am considering upgrading my AVR and wonder if I have an issue with the gain of my amps, could you pls advise if there is a problem as I do not understand the correlation between gain and sensitivity?

X4000 pre out for L/R channels via RCA to 2 NuPrime AMG Sta amps in mono (1 amp per channel)
NuPrime specs are below:

• Stereo Power: 2 X 130W @ 8 Ohm & 2 X 200W @ 4 Ohm
• Mono Power: 300W @ 8 Ohm & 320W @ 4 Ohm
• Rated / Peak Current: 10A / 15A
• Gain : 26 (stereo) & 52 (mono)
• Signal to Noise Ratio : 100 dB @ 10W
• THD+N : 0.006
• Frequency Response : 10Hz~50K Hz +-0.2dB @ 8 Ohm. 58K Hz @ -3dB
• Input Impedance: 1M Ohm
• Sensitivity: 1.2 Vrms @ Stereo; 0.95 Vrms @ Mono

Many thanks
Al

The sensitivity is the input voltage to get the device to full output power. The gain, usually expressed as a voltage ratio, is the output voltage divided by the input voltage.
It is usually expressed in db, which is the log of that ratio.

 

[lovinthehd]

Yes, but as I run in mono gain is 52 with a sensitivity of 0.95 Vrms.
I thought sensitivity was the input voltage required for full power as supplied by the pre out but now I am not sure whats what

Even then, what do you think the issue might be in your use?

 

[stinga]

Hey lads, I run 1 amp in mono for left channel and another in mono for the right channel. There is a switch on the back of the Nuprimes to select either stereo or mono output - 2 channel vs 1 channel if that makes sense.

Lol I'm not even sure if there is an issue as I thought it was ok as 0.95 Vrms would be easily outputted by my AVR. But when I noticed the gain of 52 I wondered if there is the potential for something to go wrong.
2ndly if there is anything I should be aware of when I look to upgrade the AVR?

Its no wonder us Kiwis can't fly

 

[lovinthehd]

If anything you have more than enough input to the amp.....you may need to adjust gain relationship differently than in simple stereo mode. Why are you in bridged mode (if I understand your setup)? Your avr is likely fine up to 4V in any case.

 

[TLS Guy]

Hey lads, I run 1 amp in mono for left channel and another in mono for the right channel. There is a switch on the back of the Nuprimes to select either stereo or mono output - 2 channel vs 1 channel if that makes sense.

Lol I'm not even sure if there is an issue as I thought it was ok as 0.95 Vrms would be easily outputted by my AVR. But when I noticed the gain of 52 I wondered if there is the potential for something to go wrong.
2ndly if there is anything I should be aware of when I look to upgrade the AVR?

Its no wonder us Kiwis can't fly

You have a wonderful device called a volume control which will vary the gain as you turn the knob, or use the up and down volume buttons on the remote.

 

[stinga]

Lol, ok so no issues from an electrical point of view then, most AVRs will have no problem outputting 0.95 Vrms to the NuPrimes and I don't need to be concerned about the gain correct?

My speakers are SF EAlls which take a bit of driving.

Thank you
Al

 

[lovinthehd]

Lol, ok so no issues from an electrical point of view then, most AVRs will have no problem outputting 0.95 Vrms to the NuPrimes and I don't need to be concerned about the gain correct?

My speakers are SF EAlls which take a bit of driving.

Thank you
Al

I don't get much with a search of Sonus Faber EAlls....got a link to some measurements?

 

[TLS Guy]

I don't get much with a search of Sonus Faber EAlls....got a link to some measurements?

Imaginary speakers I think. Never heard of them.

 

[stinga]

Thats cos they are 25yrs old
Electa Amator ll

 

[lovinthehd]

These ? https://www.stereophile.com/standloudspeakers/874/index.html

Thats cos they are 25yrs old
Electa Amator ll

 

[stinga]

Thats the EA 1, the EA 2 have scanspeak drivers. I'll see if I can find something when I get home from work.