It seems the integrated amp is similar in design, to a power amplifier, connected to a passive unit ( this A30 amp design, is becoming very popular ). What the OP is saying, imo, he does not like passive, as much as the AR's tube line stage, and prefers the extra gain, like many people, that do not like passive. It just so happens, the amp has it's own volume control ( no different than many pro amps having input attenuators ), but still going through a preamp, with gain, or even a passive device, with multiple inputs ( something I am very accustomed to ). Enjoy !, and be well....
AR SP8 mk2 high output volume
Hello everyone, thank you for accepting me in this group. I have my AR SP 8 mk2 preamplifier and I would like to know your opinion and if you consider its high output volume a problem with this power amp. Problem is the volume control is too low, Very sensitive amp. I can't use much volume control.Does this affect the signal quality or is it just a drawback?I just want to know if it's something I need to worry about.
here I put the specifications of the power amp Puresound A30
ower output (Class A operation) 30 Watts/ch Ultra Linear, 18 Watts/ch Triode Coupled
Frequency Response 20Hz - 20kHz -0.25 to -0.3 dB
THD 0,3%
Input Impedance 100 KOhm
S/N ratio 88 dB
Input sensitivity for 0dB 100 mV
Power Consumption 260 Watts
Net Weight 28 Kg
Dimensions (mm) 436 W x 360 D x 190 H
Inputs 3. Line Level
Outputs 4 & 8 Ohm
here I put the specifications of the power amp Puresound A30
ower output (Class A operation) 30 Watts/ch Ultra Linear, 18 Watts/ch Triode Coupled
Frequency Response 20Hz - 20kHz -0.25 to -0.3 dB
THD 0,3%
Input Impedance 100 KOhm
S/N ratio 88 dB
Input sensitivity for 0dB 100 mV
Power Consumption 260 Watts
Net Weight 28 Kg
Dimensions (mm) 436 W x 360 D x 190 H
Inputs 3. Line Level
Outputs 4 & 8 Ohm
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- 50 posts total
This just keeps going around in circles, if you don’t like the sound when it’s used as an integrated, change the source to one you like, instead of coloring it with that premp, and then having your problem of way too much gain. Just look at the specs of the A30, it’s at FULL POWER already with ONLY 0.5v (500mV) input from a source. Most sources today put out well over 2v!!! So just use it as is with it’s own passive volume control, and remember Nelson Pass saying to you ("psychological need" to turn it up more) than when the AR pre is in and then sell it. Cheers George |
BTW I do not recommend tampering with the feedback resistor- such things can lead to oscillationThis is why I say get a tech (not yourself) to disconnect the Alps passive, change the gain with the feedback to half of what it is, as he will scope it and compensate for stability. And then once that is done you can use your AR preamp which you are so insistent on using, with the volume up around or over 12 o’clock. And this is what you searching for. Cheers George |
Quite often George and I disagree, but not here. @mrdecibel This 'integrated' amp does not employ a separate gain stage for a preamp section. Its a power amp circuit (a variant of the Williamson circuit) and simply has enough gain that any source with a maximum output of 1 volt (such as an old school cassette deck) can easily drive it to full output. |
- 50 posts total