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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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 86434903024

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carolyn
Belleville, US
★★★★★ 5
Sensitive skin
Such a good product. I use after micro needling when skin is sensitive. Also a great product to use as a barrier serum when starting tretinoin cream.
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Reviewed in the United States on April 24, 2026
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Lindsay
Omaha, US
★★★★★ 5
Saved my skin during an eczema flare up
This saved my skin! I had an eczema flare on my face, and my usual products weren’t working. A friend recommended the Avene brand and within 3 days of using this rescue barrier serum, my flare was almost completely gone! This saved my face!
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Reviewed in the United States on April 11, 2026
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B Helton
San Leandro, US
★★★★★ 1
PLEASE REVIEW — FORMULA CHANGED!!!
I wish I would’ve posted a review PRIOR to the formula changing but just know that I LOVED this serum. I’ve struggled with hormonal acne (PCOS) and eczema for as long as I can remember. Finally, last summer my dermatologist put me on (3) different RX including Spironolactone and Accutane. I was so tired so I stopped everything except for CeraVe cleanser, retinol (Tretinoin) and CeraVe healing ointment. My made up skin routine was working until I used too much Tretinoin and burned my face. I had read great reviews about this product so I thought, I might as well try it — and IT WORKED! I’ve been using this product for almost a year and I loved it. However, 3 weeks ago when I ordered it, I noticed the bottle had a green tint. I could tell after one use that the feel of the serum was different, more watery, not as thick as it used to be. The smell was also different. Still, I kept using it for nearly 2 weeks and I experienced 2 breakouts! Sure enough, I stopped the product and within a few days, my skin was back to normal. I am very upset because as someone who has extremely sensitive skin, this worked but unfortunately, the new formula isn’t for me.
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Reviewed in the United States on May 14, 2026
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GramE2Caia
Waukegan, US
★★★★★ 5
Great value; great products
Size: 8.45 Fl Oz (Pack of 1)
Anua products are great. They are reasonably priced, easy to use and make your skin look and feel lovely. I really enjoy the ease of these and the small amount you use with each application. They're non irritating and leaves your skin feeling moisturized without the heavy oily feeling.
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Reviewed in the United States on May 7, 2026
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Shi
Lowell, US
★★★★★ 5
My New Holy Grail! ⟡
Size: 8.45 Fl Oz (Pack of 1)
Finally Azelaic Acid that don't break me out. I've tried US skincare and they are nothing but harsh to my skin. I've tried korean skin care before but I guess I wasn't buying the product that targets my skin concerns. Now that I'm giving korean skin care a second go, it did not disappoint! I can see my skin improving! ⟡
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