Cherry STM 36/48/60 volts

0 Members and 1 Guest are viewing this topic. Read 223 times.

pompon

  • Jr. Member
  • Posts: 23
Cherry STM 36/48/60 volts
« on: 3 Mar 2021, 01:22 am »
Hello everyone,

I am looking for a quiet amp for my Raal 140-15d tweeter (95dB sensitity and no passive XO).

For STM:

​Gain: 24dB (balanced, rear), 33dB (single ended, front)
Sensitivity (KING 60V Version): 3.1Vin for 400Wout into 4Ω
Sensitivity (48V Version): 2.2Vin for 125Wout into 4Ω

Considering the output of my DAC is:
Line Output Level Balanced     4.5Vrms

If I use the 36volts vs the 60v power supply, which power supply will give the highest sound level for the same volume on the dac?



pompon

  • Jr. Member
  • Posts: 23
Re: Cherry STM 36/48/60 volts
« Reply #1 on: 5 Mar 2021, 03:56 am »
I understand Cherry have 22 dB gain

36 volts cherry clip at 2.4 volts (70 watts)
48 volts cherry clip at 2.4 volts (140 watts)
60 volts cherry clip at 3.1 volts (200 watts)

With 1 volt input, the 36 cherry will play less loud than the 48 cherry right ?

With the King, the amp have internal modification to have more gradation ? 2.4 to 3.1 volts to allow the volume have more steps ?


FullRangeMan

  • Volunteer
  • Posts: 15587
  • To whom more was given more will be required.
    • Never go to a psychiatrist, adopt a straycat or dog. On the street they live only two years average.
Re: Cherry STM 36/48/60 volts
« Reply #2 on: 5 Mar 2021, 04:20 am »
Nice you found a reliable answer with your friend,  since the last year have been many new members doing double or triple comparative questions.

pompon

  • Jr. Member
  • Posts: 23
Re: Cherry STM 36/48/60 volts
« Reply #3 on: 5 Mar 2021, 05:24 am »
Nope ... I missed some points.

King or 48 volts Cherry is the same amp ... no internal modification If I understand correctly.

Why with the 60 volts the input sensitivity is lower (3.1 volts vs 2.4 volts ??)

FullRangeMan

  • Volunteer
  • Posts: 15587
  • To whom more was given more will be required.
    • Never go to a psychiatrist, adopt a straycat or dog. On the street they live only two years average.
Re: Cherry STM 36/48/60 volts
« Reply #4 on: 5 Mar 2021, 06:03 am »
Nope ... I missed some points.

King or 48 volts Cherry is the same amp ... no internal modification If I understand correctly.

Why with the 60 volts the input sensitivity is lower (3.1 volts vs 2.4 volts ??)
Oh yeah they are fascinanting amps.
May be different impedance.