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SPL Crescendo preamp-120 volt rail-Does it worth? Multi-Channel Preamps
Old 22nd October 2018
  #1
Gear Nut
SPL Crescendo preamp-120 volt rail-Does it worth?

Here SPL claims it is nearly impossible to overdrive the input of these new Crescendo preamp thank to the 120 volt rail technology.

Crescendo – SPL

Could someone explain what is that 120 volt rail technology? Does it worth or is this marketing? How would it compared on that aspect to other high end preamps (Millenia and others)?

I never heard about these supra op amp neither. Are you familiar with the technology?

Thank you,

Dan
Old 8th November 2018
  #2
Gear Nut
This is a ''bump''. Then if no one knows anything about the 120 Volt rail technology or the supra op amp I will repost in the geekslutz forum.

Have a great day,

Dan
Old 8th November 2018
  #3
Gear Guru
 
Drumsound's Avatar
Higher voltage=more headroom.
Old 8th November 2018
  #4
Lives for gear
 
Earcatcher's Avatar
SPL's 120 volt technology could already be found in their mastering series of EQ's and compressors and their summing mixer Neos. There the opamps work really well: very agile, dynamically effortless. There have been some comparisons of Neos and other summing mixers, and the Neos sound was considerably more attractive, with more muscle and no distortion.
Old 9th November 2018
  #5
Gear Nut
I am not an expert and it is why I am asking you guys.

If you compare the specs of the SPL Crescendo to the specs of the Millenia HV-3d-8 the Millenia looks as good or better...and it is a lot cheaper. Also if the SPL has so much headroom what is the reason for the pad on each channel? What do you think?

SPL Crescendo
Frequency range
20-50kHz, -3dB

Noise (A-weighted)
(60dB Gain) -69.7 dB
(30dB Gain) -87.5 dB

FFT
(60dB Gain) -96dBu
(20 dB Gain) -120dBu

CMRR
(60 dB Gain) > 65dBu/1kHz
(30 dB Gain) > 75dBu/1kHz

THD/N
(60dB Gain) 0.04%
(30dB Gain) 0.008%
(10dB Gain) 0.00009%

E.I.N
(60dB Gain) 150 Ohm 129.5 dB
(60dB Gain) 40 Ohm 134.4 dB

Millenia
Frequency Response (+0 / -3 dB)
sub 3 Hz to beyond 300 kHz

Noise (60 dB Gain, 10 Hz - 30 kHz, Inputs common)
-133 dB EIN

Total Harmonic Distortion + Noise (35 dB Gain, 10 Hz - 20 kHz bandwidth, +27 dBu Out)
< .001%, Typ. < .0005% (< 5 ppm)

Intermodulation Distortion (50 Hz & 7 kHz) 35 dB Gain, +27 dBu Out
< .0009%

Phase Response (35 dB Gain, 50 Hz - 20 kHz bandwidth, +27 dBu Out)
< 2 degrees deviation

Common Mode Rejection Ratio (35 dB Gain, 10 Hz - 20 kHz bandwidth, 100 mV C.M.)
> 65 dB, Typ > 85 dB

Slew Rate (35 dB Gain, +27 dBu Out)
> 25 Volts per microsecond

Maximum Input Level (20 Hz - 40 kHz)
+23 dBu (no attenuator pads required)

Maximum Output Level (20 Hz - 40 kHz)
+32 dBu

Thank Guys,

Dan
Old 9th November 2018
  #6
Lives for gear
 

Quote:
Originally Posted by DanTheMan06 View Post
Also if the SPL has so much headroom what is the reason for the pad on each channel?
On their website:

Old 9th November 2018
  #7
Gear Guru
 
Drumsound's Avatar
Quote:
Originally Posted by DanTheMan06 View Post
I am not an expert and it is why I am asking you guys.

If you compare the specs of the SPL Crescendo to the specs of the Millenia HV-3d-8 the Millenia looks as good or better...and it is a lot cheaper. Also if the SPL has so much headroom what is the reason for the pad on each channel? What do you think?


Thank Guys,

Dan
Specs don't tell you how something sounds.
Old 9th November 2018
  #8
My 500 watt Adcom GFA 555 power amp runs on 80 volts. Analog tape saturates at +13 dbu. Modern ADC's clip at + 20 dbu.

What is the purpose of 100+ volt preamp power rails unless it's to be able to blow up anything downstream?
Old 10th November 2018
  #9
Lives for gear
 
bcgood's Avatar
 

Quote:
Originally Posted by Jim Williams View Post
My 500 watt Adcom GFA 555 power amp runs on 80 volts. Analog tape saturates at +13 dbu. Modern ADC's clip at + 20 dbu.

What is the purpose of 100+ volt preamp power rails unless it's to be able to blow up anything downstream?
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