ben_
Active Member
Hello
I intent to use a separate preamp as an upgrade path from my integrated Yamaha AX-592 which is powerful enough for my speakers but I found the preamp section not so good for digital sources, because of not so good channel separation and rounded top and bottom frequency response (in direct mode). No turntable to use in this room so I did not compare phono sections from the pre amps.
The 2 pre-amplifiers I can get in my budget and needs are a NAD 116 and a Rotel RC-1070, but I cant figure out from the specifications if they will be compatible with the power section of my amp (the Rotel I think its ok)
The yam (power amp) specs states
- Main in Sensitivity/Impedance : 1V/ 30kOhms
- Pre out level/Impedance : 1V/1.2kOhms (I'll use that as reference)
- CD in Sensitivity/Impedance : 150mV/47 kOhms (For reference also)
The Rotel RC-1070 Pre spec states
- Input Sensitivity/Impedance : 150 mV/24 kOhms
- Output Level/Impedance : 1V/100 Ohms
So I calculated a max gain of 16.48dB, and it seems the output level is the same as the Yamaha built-in pre section, with a lower impedance.
The Nad 116 Pre spec
- Line level input impedance R+C : 20k +450pF
- Line Level Inputs sensitivity :
- ref. 0.5V : 80mV
- ref. 2V : 300mV
- Voltage gain : 16dB
- Output impedance (pre out) : 220 Ohms
- Maximum output level (pre out) : >12V
What does NAD means in their spec values and why are there 2 sensitivity refs ? I understand that you can drive it with 2v on the line level input and get more than 12v on the pre-out, which is 15.56dB gain. And if you drive it with a more common line level of 250mV you will get at max 1.5v on the output, and the NAD could also be compatible and wont saturate main inputs in the Yamaha.
Am I right with the maths ?
Besides that, if anyone as comments on these 2 pre-amps I'll be glad to read what you think
Many thanks
I intent to use a separate preamp as an upgrade path from my integrated Yamaha AX-592 which is powerful enough for my speakers but I found the preamp section not so good for digital sources, because of not so good channel separation and rounded top and bottom frequency response (in direct mode). No turntable to use in this room so I did not compare phono sections from the pre amps.
The 2 pre-amplifiers I can get in my budget and needs are a NAD 116 and a Rotel RC-1070, but I cant figure out from the specifications if they will be compatible with the power section of my amp (the Rotel I think its ok)
The yam (power amp) specs states
- Main in Sensitivity/Impedance : 1V/ 30kOhms
- Pre out level/Impedance : 1V/1.2kOhms (I'll use that as reference)
- CD in Sensitivity/Impedance : 150mV/47 kOhms (For reference also)
The Rotel RC-1070 Pre spec states
- Input Sensitivity/Impedance : 150 mV/24 kOhms
- Output Level/Impedance : 1V/100 Ohms
So I calculated a max gain of 16.48dB, and it seems the output level is the same as the Yamaha built-in pre section, with a lower impedance.
The Nad 116 Pre spec
- Line level input impedance R+C : 20k +450pF
- Line Level Inputs sensitivity :
- ref. 0.5V : 80mV
- ref. 2V : 300mV
- Voltage gain : 16dB
- Output impedance (pre out) : 220 Ohms
- Maximum output level (pre out) : >12V
What does NAD means in their spec values and why are there 2 sensitivity refs ? I understand that you can drive it with 2v on the line level input and get more than 12v on the pre-out, which is 15.56dB gain. And if you drive it with a more common line level of 250mV you will get at max 1.5v on the output, and the NAD could also be compatible and wont saturate main inputs in the Yamaha.
Am I right with the maths ?
Besides that, if anyone as comments on these 2 pre-amps I'll be glad to read what you think
Many thanks
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