SKU: 86434903024

SPL CRESCENDO DUO v2 Dual-Channel Microphone Preamplifier

Sale price$1709.55 Regular price$1899.50
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Description

SPL CRESCENDO DUO v2 Dual-Channel Microphone PreamplifierCrescendo duo combines the precise sound that German Rundfunk Technik is famous for with the innovative SPL 120V technology. The internal operating voltage of 120 volts allows Crescendo microphone preamplifiers to break completely new ground. This results in microphone preamps that create a detail rich, vivid and equally honest sound image. Crescendo duo lets microphones shine in a whole new light because they have never been amplified like this

Crescendo duo combines the precise sound that German Rundfunk-Technik is famous for with the innovative SPL 120V technology. The internal operating voltage of 120 volts allows Crescendo microphone preamplifiers to break completely new ground. This results in microphone preamps that create a detail-rich, vivid and equally honest sound image.

Crescendo duo lets microphones shine in a whole new light – because they have never been amplified like this before.

The Undistortable

Thanks to the SPL 120V technology, it is almost impossible to overdrive this microphone preamplifier.

Crescendo duo is a dual-channel microphone preamplifier with 120V technology. Both channels feature the same range of functions. Besides phantom power (48 V) for condenser microphones, polarity reversal, a high-pass filter and a PAD switch, they provide the possibility to adjust the VU meter to display very high levels – so they leave nothing to be desired. The gain can be adjusted comfortably and precisely via a 12-step switch. With the switchable output control, the output level of the Crescendo duo can be perfectly adapted to following AD converters. Two outputs per channel allow the signal to be sent to two different devices in parallel. In addition to the extensive feature set and the outstanding technical characteristics, Crescendo duo convinces with a sonic authenticity that is second to none.

48 V

The 48V switch activates the required phantom power of 48 volts for the use of condenser microphones.

VU-10

With this switch the level displayed in the VU meter can be adjusted by -10 dB. This is very handy to display high levels.

Ø

Activating the polarity reversal switch turns the polarity of a microphone signal by 180°.

HP

A high-pass filter with 6 dB per octave reduces subsonic noise below 120 Hz.

Specifications

Analog inputs & outputs; XLR (balanced)

 Input impedance 10 kΩ
Output impedance 75 Ω
Maximum output gain 32.5 dBu
Common Mode Rejection Ratio (1 kHz, 30 dB Gain) 79 dB
Frequency range (30 dB Gain) 20 Hz – 100 kHz
THD + N (10 Hz – 22 kHz, 30 dB Gain) 0.0036 %
THD + N (10 Hz – 22 kHz, 70 dB Gain) 0.32 %
Noise (A-weighted, 150 Ω, 30 dB Gain) - 89.2 dBu
Noise (A-weighted, 150 Ω, 70 dB Gain) - 51.7 dBu
Equivalent Input Noise, EIN (150 Ω)

-121.7 dBu

 

Internal Linear Power Supply with Toroidal Transformer

 Operating voltage for analog audio +/- 60 V
Operating voltage for relays and LEDs + 12 V

 

Mains Power Supply

 Mains voltage (selectable) 230 V AC, 50; 115 V AC, 60 Hz
Fuse for 230 V T 500 mA
Fuse for 115 V T 1 A
Power consumption max. 17.7 W

 

Dimensions & Weight

 W x H x D (width x height x depth) 19 x 3.46 x 11.8 inch
Unit weight 13.45 lbs
Shipping weight (incl. packaging) 16.54 lbs

 

Shipping Notes
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  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 86434903024

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Max Podolsky
Chelsea, US
★★★★★ 5
Easy to use
Style: 6-Speaker
This was a lifesaver. After buying a house, I discovered a huge mess of audio cables wired throughout the place, and this plate made it possible to finally get everything organized. Quality is decent, not the best, but good for the value. Super easy to use and connect even old wires to it from the back.
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Reviewed in the United States on December 31, 2025
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jiminoz
Grantham, US
★★★★★ 5
These wall plates look good and work well
Style: 2-Speaker
I used these wall plates for my home theater system. They are easy to install, look good, and accepted my banana plugs perfectly. They make my installation look tidy and I am pleased with the outcome. I have used other Cable Matters products in past and have always been happy with the results.
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Reviewed in the United States on January 12, 2026
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Amazon Customer
Lexington, US
★★★★★ 5
Excellent, clean look
Style: 1-Speaker
Great wall plate for that clean, in wall wiring look. Easy to install and connections are solid.
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Reviewed in the United States on November 26, 2025
T
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Talisman
Cuba, US
★★★★★ 4
Great...but could be a bit better
Style: 2-Speaker
Almost perfect. Easy to screw apart and insert wires to both the back and to the front, or do what I did and screw the wire onto the back and then use a banana plug for the front. My only complaints are that the back piece sits off the wall a little, so the plate doesn't fit flat and tight against the wall. It leave a little gap around the edges. The other complaint is that the back piece has some flex in it, which makes me nervous when I push plugs into and out of it. I think it probably will hold up fine, but it feels a little oogy to push banana plugs into it and see it flex. Comes with all the hardware needed. Just need a philips screwdriver and wire cutters and you're good to go. Super easy to use, and way better than the spring loaded connections it replaced.
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Reviewed in the United States on July 12, 2017
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ulisses
San Leandro, US
★★★★★ 5
Built well
Style: 4-Speaker
Still working great no issues with sound quality.
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Reviewed in the United States on April 17, 2026

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