Warm Audio Bus-Comp

2-Channel VCA Compressor

  • Switchable signal path with CineMag USA input and output transformer
  • THAT 2180 VCAs
  • External side chain input switchable
  • Switchable hi-pass filter: 30, 60, 105, 125, 185 Hz
  • Frequency response: 18 to 22,000 Hz
  • Dynamic range:> 120 dB
  • Input impedance: 10k ohms
  • Output impedance: 50 ohms
  • Input and output: XLR and TRS jack
  • Built-in power supply
  • Dimensions: 19"/ 1U

Further Information

Compressor Yes
Gate No
Peak Limiter Yes
2-Channel Unit Yes
Attack/Release Adjustable Yes

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4.6 /5
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Great SSL sound for the price
GuilB, 26.12.2020
I use the Warm Audio Bus-Comp mainly in the master buss all the time, as well as in different busses (tried it on drums, orchestral, synths, guitars stems, etc).

Achieves a great sound, even using just the transformer (compression off) on a number of tracks, as it adds a subtle pleasant ear candy to the whole mix.

When adding the compression, the high pass sidechain works great in avoiding undesired excessive low end pump in low percussive sources. I usually set it up @ 105hz on mixes including drums.

I rate it with 4 stars in "characteristcs" because would be great having a dry/wet mix knob. Solved this by printing the wet stem and mixing that audio track later to taste anyway, but would be faster with a knob included in the hardware.

I strongly recommend this product for this value, very happy so far with it, as well as with other Warm audio products.
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But Auto Release is wrong..
Alberto9475, 29.07.2020
This Compressor it's relatively well built and sounds very good,
attack timings are correct, but the auto-release is based on the wrong schematic, so it doesn't behave like the original.
Also the gain reduction meter is not like shown in the pictures, instead it's the usual ugly Chinese meter with narrow scaling and poor ballistics.

I do like the addition of output transformers as they can be useful on some material.

Honestly though, Warm Audio should have done a better job, at least they should have known the correct auto-release schematics, and the fact they are showing a better looking meter on product pictures it's also a bit misleading.
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Good choice for this value
Mile Ross, 28.07.2020
At first i thought there was no difference between the software versions of the SSL comp, and the “Warm Audio bus comp” hardware version. But there is a lot of difference. The “Warm Audio bus comp” is based on an old SSL circuit on audio masters. To me, this is a piece of serious studio equipment. Now my master mix is upped from demo level to professional level.
For external side chain you will find out how work, amazing. Unfortunately i have only one KLARK EQP-KT tube equalizer and i work in mono mode, but in near future when KlARK EQP-KT will be available again, then i will reach mastering exactly how i dreamed.
I strongly recommend this product for this value.
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absolute Kaufempfehlung
Torsten B, 25.07.2020
Bisher dachte ich immer, dass vari-mu-Kompressoren der heilige Gral sind. SSL-Kompressoren hatte ich nie auf dem Zettel. Durch Zufall bin ich auf den Warm-Audio Bus-comp gestossen. Auf YT hatten mich die Hörbeispiele angesprochen und da ich gerade ein Album fertig gemischt habe, wollte ich im Mastering mal etwas anderes einsetzen. Der Bus-Comp hat mich dabei absolut überzeugt. Er fügt die Signale wie Klebstoff zusammen, ohne dass es schmierig wird.

Er klingt eigentlich neutral, setzt aber die Vocals rein in den Mix. Gitarren links/rechts klingen straff wie in Stein gemeisselt. Ich habe den kompletten Gitarrenbus mal durchgeschickt und die Gitten setzen sich besser durch. Drums, insbesondere die Snare bringt man richtig zum Klatschen. Da er ja im Stereobetrieb arbeitet und demzufolge die Kanäle in der Steuerung gelinkt sind, müsste es eigentlich enger klingen als ein Kompressor im dual-Modus. Ist aber genau das Gegenteil.

Heute habe ich ihn gegen einen 2-kanaligen Comp-54 von Golden-Age und 2 KT2A von Klark-Teknik verglichen. Der Warm-Audio hat beide platt gemacht. Einzelsignale arbeitet er mehr heraus. Komplette Mixe hören sich einfach besser an mit einer edlen Note im Hochton. Der Bass ist straff und tight. Auf dem Mix, Drums und Gitarren ist er richtig taff. Auf dem Rest klang er gut. Er darf sehr gerne bleiben.

Auch mit kurzer Attack klingt ein Mix nicht überkomprimiert. Die Übertrager geben nochmal richtig Saft und 3D in den Mix. Die Schalter sind sehr schwergängig. Ich kann damit leben. Bei den Attackzeiten finde ich den Übergang von 0,6 auf 3 ms und von 3 auf 10 ms etwas groß. Mindestens 6 ms hätte ich mir da gewünscht. Aber die Gutmütigkeit des Bus-Comp füllt diese Lücke wieder etwas auf.

Übrigens gibt es bei SSL-Comps eine Besonderheit. Man ist es gewohnt, wenn man die Ratio erhöht, dass dann auch die Gain-Reduktion zunimmt. Das ist bei SSL und den Clones nicht so. Erhöht man die Ratio, verringert sich die GR. Man muss also den Threshold tiefer ansetzen, um den gleichen Grad an Kompression zu erhalten. Warum das so ist, kann ich technisch nicht erklären. Aber der Bus-Comp von Warm Audio handelt nach dem SSL-Vorbild.

Fazit: das Gerät ist über jeden Zweifel erhaben und jeden Euro wert. In einem analogen Chain ist der Bus-Comp von Warm Audio für die straffe Komprimierung mit Charakter genau das richtige Teil.
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$733 €603.36
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