MASTERING

PASSEQ

Passive Mastering Equalizer

In the PASSEQ we have revived the concept of the passive equalizer that was used in the 50’s and 60’s. The charming sound of this vintage technology combined with the modern 120V technology results in a very special equalizer.

Cut

Boost

Only one filter​

All control functions are part of only one passive filter.

There are three frequency ranges:

Low Freq / Mid Freq / High Freq

Each with a cut control on the left and a boost control on the right.

In the middle is the output control.

Design

A passive filter has no amplification stages. It can therefore only be lowered. If one frequency is to be boosted, all the others must be lowered. Behind the filter there is a stage that makes up for the lowered overall level. Since low noise is particularly important here, since up to 20 dB can be made up for, the 120V technology comes into its own.

The entire passive filter (variable resistor, capacitor and coil) provides a very nice sound characteristic. Besides the choice of components, the charging behaviour of the capacitors and the saturation behaviour of the coils play a major role in this. The resulting relative inertia compared to potentially very fast active filters is the reason for a pleasant, musically advantageous sound characteristic. We would choose smoothness and transparency as well as strikingly silky highs and pithy basses as a description that suits our perception.

During fine-tuning, through component selection, in countless listening sessions, the emphasis was on achieving the most musical sounding curves possible, which, for example, need fear no comparison with a Pultec EQ from the 1950/60s. Only without all the disadvantages of a 60 year old original, such as the very high background noise, but above all the very limited frequency selection.

Another highlight of the PASSEQ is the HF+ band, which has been extended by the frequencies 25 kHz and 35 kHz and sounds so incredibly good that you don’t want to switch it off.

Play Video
This video guides you step by step through the Passeq.
Play Video
This video introduces you to the entire mastering series.

The 120V Technology

What exactly is that?

And what does it do?

Good questions need good answers. And that’s what the 120V video gives you.

Play Video

Reviews

Studio Magazin
Bonedo

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Specifications

Analog inputs & output; XLR (balanced)

Maximum input & output gain
32.5 dBu
Input impedance
20
Output impedance
75 Ω
Common mode rejection
-60 dBu
Frequency range (-3 dB)
10 Hz – 200 kHz
Crosstalk (1 kHz)
-108 dBu
THD + N (+30 dBu, 1 kHz)
0.0012 %
Noise (A-bewertet)
-95.2 dBu
Dynamic range
134.5 dB

Internal Linear Power Supply with Shielded Toroidal Transformer

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

Mains Power Supply

Mains voltage (selectable, see fuse chamber)
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. 15 VA

Dimensions & Weight

W x H x T (W x H x D (width x height x depth) x Höhe x Tiefe)
482 x 132 x 300 mm
19 x 5.2 x 11.8 inch
Unit weight
10.2 kg
22.49 lb
Shipping weight (incl. packaging)
14 kg
30.86 lb

Reference: 0 dBu = 0,775V. All specifications are subject to change without notice.

Events

Due to Covid19 there are no events scheduled at this time.

What does it actually mean …

In Stock!

The product is in stock in our warehouse in Niederkrüchten, Germany, and will be shipped the same or next working day.

We process the orders after receipt of the order and update the stock in the online shop regularly. If the product is no longer available at short notice due to high order volume, you naturally have the right to withdraw from the purchase (see Right of Withdrawal).

In any case, you will receive an e-mail with details of the delivery and the estimated delivery time.

Available soon!

The product is not in stock in our warehouse in Niederkrüchten, Germany. Usually it will be available again within 5 working days.

In any case, you will receive an e-mail with the details of the delivery and the estimated delivery time.

Of course you have the right to withdraw from your purchase (see Right of Withdrawal).

Product Condition

A-Stock

Brand-new product from the current product portfolio.

B-Stock

Demo, exhibit or return item.
In original packaging, incl. manuals and full warranty.
Only slight to no signs of use.

C-Stock

Demo, exhibit or return item.
In original packaging, incl. manuals and legal warranty.
In some cases clear signs of use, which are documented in photos.

NOS

"New Old Stock"
After discontinuation of a product still available new products with full warranty.

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