MASTERING

IRON

Mastering Compressor

As a mastering compressor, IRON is inspired by the legendary vintage tube compressors à la Fairchild, Collins or Gates and has been developed in a way to give modern productions more energy and power with the advantages of the 120V technology.

Input & Output

Input and output levels are switchable in a control range of +/- 12dB. An increase of the input level leads to more intensive compression. When mastering full scale material, the reduction can be useful. The output is used to adjust the level ratios of input and output.

Attack & Release

The time parameters Attack and Release are switchable in six steps from Slow to Fast. The times vary depending on the rectifier circuit selected.

Side Chain EQs

With the side chain EQs, compression can be focused on frequency ranges. In addition to an inserted EQ, there are four internal EQ presets with a partly complex frequency response.

Rectifier

The tube stage is controlled by a rectifier circuit. There are six diode control characteristics generated by germanium, silicon and LED diodes or combinations thereof.

“The SPL IRON mastering compressor is very versatile. I work with it completely musically, completely by ear. You can use it very softly, but also perform very extreme settings, which heavily influence sound structure and dynamics.”

“Its headroom seems limitless. It avoids unwanted peaks and compresses the sound that passes through it in a very musical way.  I owe it excellent masterings.”

“Before going back into my converters my signal usually gets compressed and lifted to heaven by the IRON compressor.”

“This is my color box. I barely not compress in mastering. When mixing, then I use it to glue some stems.”

Variable-Bias Limiter/Compressor

The IRON Mastering Compressor is a variable-bias (variable µ) limiter/compressor from the basic concept.

IRON works on the principle of the bias controlled remote cutoff tube. Parallel to this, a medium-variable-bias triode (sharp-cutoff tube) with a steeper characteristic is connected. The tube bias voltage (BIAS) can be adjusted in three steps.

The tubes are integrated into special Lundahl manufactured balanced high-level double core mu-metal-iron transformers.

AirBass & Tape Roll-Off

The compressor is followed by a passive filter network with two equalizer presets: AirBass and Tape Roll-off.

The AirBass filter boosts low and high frequencies by about 1.5 dB and the Tape Roll-Off filter emulates the typical frequency response of a tape machine.

Link

All functions can be set via switches and the threshold via a rasterized potentiometer which makes recall easy.

The settings of Threshold, Bias, Attack, Release, Rectifier and Side-Chain-EQs are transferred from the right side (channel 2) to the left side in Link Mode, in which the compressor operates with summed control signals.

Auto-Bypass

Channels 1 and 2 are activated with the large illuminated IDEC switches.

In Auto Bypass mode, the channels are automatically switched on and off, which leads to a more objective assessment.

The Interval control is used to adjust the time window continuously between two and 20 seconds.

Play Video
Jonathan Wyner of M-Works Mastering talks about PQ and Iron
Play Video
Michael Romanowski: Grammy-Nominated Mastering Engineer - Warren Huart: Produce Like A Pro
Play Video
In the studio with Simon Phillips
Play Video
This video introduces you to the entire mastering series.

The 120V technology

The 120V technology is our reference technology. The 120V technology is unique in the world. It operates at a DC voltage of 120 volts. This is four times that of IC-based semiconductor op-amps.

The highest possible audio quality requires the highest possible audio operating voltage.

The 120V technology works with +/-60 V. To be able to handle such a high voltage, we have developed special proprietary operational amplifiers that can operate with a DC voltage of +/-60 V: the SPL 120V SUPRA operational amplifiers.
This high voltage would destroy conventional components and operational amplifiers.

By the way, the “120V” in the name of the technology has nothing to do with the local mains voltage from the mains power socket. This is about the operating voltage inside the device with which the audio signals are processed.

The mains voltage from the mains power socket is transformed to the required secondary voltage in the device’s internal linear power supply with toroidal transformer. Rectifiers convert this AC voltage into DC voltage required in the audio device.

The idea for SPL 120V technology and the SUPRA operational amplifier based on this technology were developed in the 1990s by SPL founder and chief developer Wolfgang Neumann.

With the goal of building the best mastering console ever, this basic technological philosophy then took shape for the first time – thus the SPL MMC1 Mastering Console for Galaxy Studios saw the light of day in 2000.

SPL MMC 1 in the „Galaxy Mastering Studios“
SPL MMC 1 in den „Wisseloord Studios“

The outstanding sonic and technical features quickly got around in the scene – so further orders were not long in coming.

Besides the MMC 1, another legendary product with 120V technology was created with the PQ, the “King of Parametric Equalizers”.

Since that time, 120V technology has been the foundation for all SPL premium products. Meanwhile, not only for mastering applications, but also for the, studio or hifi use.

SPL PQ – Modell 2050

What exactly is that?

And what does it do?

Good questions need good answers.

And that’s what the 120V technology video gives you.

Play Video

Reviews

Recording
MixOnline
Tape Op
Studio Magazin
Bonedo
Amazona

Other Mastering Series Products

Mercury
Mercury
Mastering D/A Converter
Gemini
Gemini
Mastering M/S Processor
Hermes
Hermes
Mastering Router
MC16
MC16
16-channel Monitor Controller
DMC
DMC
Mastering Console
PQ
PQ
Mastering Equalizer
PASSEQ
PASSEQ
Passive Mastering Equalizer

Manuals

Play Video
Replacement of defective fuses for 115V
Play Video
Replacement of defective fuses for 230V
Play Video
Changing the mains voltage from 115V to 230V
Play Video
Changing the mains voltage from 230V to 115V

Specifications

Analog inputs & output; XLR (balanced)

Maximum input & output gain
32.5 dBu
Input impedance
20
Output impedance
75 Ω
Frequency range (-3 dB)
10 Hz – 40 kHz
Common mode rejection (0dBu, 1kHz)
> 80 dB
Crosstalk (1 kHz)
-108 dBu
THD (+10 dBu)
0.002 %
Noise (A-weighted)
-98 dBu

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 1 A
Fuse for 115 V
T 2 A
Power consumption
max. 40 VA

Dimensions & Weight

W x H x D (width x height x depth)
482 x 132 x 300 mm
19 x 5.2 x 11.8 inch
Unit weight
11 kg
24.25 lbs
Shipping weight (incl. packaging)
12.9 kg
28.44 lbs

Referenz: 0 dBu = 0,775V. Technische Änderungen vorbehalten.

Calculation of VAT (value added tax)

All prices are displayed by default including the VAT of your country.

If your country cannot be determined via geolocation and you are not logged in as a user with the billing address of your country, the prices are displayed including the VAT of Germany (19%).

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.

Due to the current pandemic and the associated worldwide shortage of components, delivery times may be significantly delayed in some cases.

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).

Currently unavailable.

This product is currently sold out and unavailable.

Was bedeutet eigentlich …

Auf Lager!

Das Produkt ist in unserem Lager Niederkrüchten vorrätig und wird noch am selben oder nächsten Werktag versendet.

Wir arbeiten die Bestellungen nach Bestelleingang ab und aktualisieren den Bestand im Online-Shop regelmäßig. Falls das Produkt wegen hohem Bestellaufkommens kurzfristig nicht mehr verfügbar ist, hast du selbstverständlich das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).

In jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.

Bald verfügbar!

Das Produkt ist in unserem Lager Niederkrüchten nicht vorrätig. Gewöhnlich ist es innerhalb von 5 Werktagen wieder verfügbar.

Aufgrund der aktuellen Pandemie und der damit verbundenen weltweiten Bauteileverknappung kann sich die Lieferzeit z.T. stark verzögern.

Auf jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.

Selbstverständlich hast du das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).

Zur Zeit nicht verfügbar.

Dieses Produkt ist derzeit ausverkauft und nicht verfügbar.

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.

Events

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

Events

Aufgrund von Covid19 sind derzeit keine Events geplant.

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