CONSUMER

PRO x8

228Audio Interface

8-Channel Unidirectional Level Interface Consumer Out to Pro In

Audio Quality

This is not just a buzzword at Aphex. Our products are known around the world for their ultra-high sound quality. It’s our benchmark. Given that the Model 228 is a relatively simple product, nothing more than a level interface, we placed a high priority on endowing it with the best sound quality possible. That’s why we designed it with high-voltage impedance-balanced outputs and ground-loop isolating unbal- anced inputs. The audio circuitry was care- fully crafted throughout to maximize sonic performance. There are no cookbook audio circuits in the 228.

Aphex Leads The Way

There are plenty of stereo level interfaces out there from various manufacturers. Of these, the Aphex 124A enjoys a reputa- tion as the one of the world’s finest. The 124 blazed a trail with it’s high definition servo balanced input and output circuits and remains as the premier bidirectional stereo level interface. However, the need for something else is becoming acute.

Today’s multichannel sound of 5, 6, 7 or more channels makes using two channel interfaces cumbersome and expensive. Furthermore, the greatest need by far is to translate consumer level outputs to professional level inputs. Bidirectionality is seldom needed. That’s why Aphex cre- ated the Model 228 Unidirectional Level Interface. It is perfectly suited to the vast majority of multichannel uses in the studio and the theater.

Unmatched Reliability

Aphex engineering and manufacturing pro- duces products that last and last without need for repairs or calibration. Some of our products have literally been in 24-hour use

in the same rack for a decade or longer! When you specify a Model 228, you know it will do its job flaw- lessly and give you peace of mind.

Useful Extras

The 228 combines outstanding audio performance with utility features that will make your installation and operation much easier. The front-panel extended- range VU meter lets you calibrate and monitor each channel individually. Eight 2-color signal presence/ clip indicators let you know instantly if sound is pres- ent on each channel and if overload occurs.

Front panel gain trims for all eight channels allow you to balance the match gain. Fully clockwise, gain is calibrated to the reference 11.78dB. Counterclock- wise, the trimmer attenuates by 12dB, giving you unity gain. For theater installations, a provision is made to dim all the lights on the front panel.

A test CD with commonly used reference levels is included for easily matching up your specific equip- ment.

Level Translation: A Very Brief Tutorial

Mixing of consumer and professional grade audio equipment is occurring more and more. For example, consumer DVD players cost far less than pro ver- sions, but don’t readily connect to the input of a studio console or monitor system. Another example: the high-end power amplifiers being used in home theaters have balanced line level inputs and can’t be driven directly from the consumer decoders and preamps. In such cases, a multichannel consumer- to-pro level interface is needed that can receive from a consumer level RCA jack at -10dBV (316mV RMS) and send to a pro level XLR jack at +4dBu (1.228V RMS). That requires a voltage gain of 3.886, which can also be stated as 11.79dB.

Typical Uses

Broadcast, Recording, Film, Home Theater, Installed and Mobile Sound, DAW Input, Mastering.

Features

•8 Discrete -10dBV RCA Inputs

•8 Discrete +4dBu XLR Outputs

•8 Signal Presence/Clip Lights

•Extended Range VU Meter

•8 Gain Trims

•Gold Plated Connectors

•Calibrated 11.78dB Gain

Exact -10dBV to +4dBu translation

• 12dB Attenuation Range

Great for unity gain applications

•Low Noise

•High Definition Audio

•Impedance Balanced Outputs

•High Reliability

•Calibration CD Included

•Front Panel Dimming

SPECIFICATIONS

Rated at nominal gain (11.78dB)

Inputs:

8 Unbalanced, RCA Female

Outputs:

8 Balanced, XLR 3-Pin Male

Gain Translation:

11.78dB Adjustable +/- 6dB

THD:

Less than .005% at MOL

IMD:

Less than .005% at MOL

Output Noise:

-80dB @input shorted

SNR:

84dB

Dynamic Range:

104dB

Max Output Level (MOL):

+24dBu, load > 600 ohms

Max Input Level (MIL):

3.55V RMS

Power Supply:

Internal, fused

Power Requirements:

100/120/240V~ 50/60Hz

Size:

19 in. W x 1.75 in. H x 9 in. D

Net Weight:

5lbs.

C US 59887

 

Improving The Way The World Sounds

S Y S T E M S

Aphex Systems Ltd. • 11068 Randall St., Sun Valley, CA 91352. Tel: (818) 767-2929 Fax: (818) 767-2641 Email: sales@aphex.com . Aphex

and Compellor are registered trademarks.

w w w . a p h e x . c o m

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Aphex Systems 228 specifications Audio Quality, Aphex Leads The Way, Unmatched Reliability, Useful Extras, Typical Uses

228 specifications

The Aphex Systems 228 is a renowned audio signal processor, particularly favored in the professional audio and broadcasting industries. This versatile device combines advanced technologies to enhance audio quality and provide an array of features tailored for various applications, from live sound reinforcement to studio recording.

One of the standout features of the Aphex 228 is its Adaptive Gain Control (AGC). This technology automatically adjusts the input levels, ensuring that audio signals remain consistent and free from distortion. This is particularly useful in dynamic environments where audio levels can fluctuate, as it maintains clarity and balance throughout the performance or recording.

The unit includes an integrated de-esser, which effectively reduces harsh sibilance sounds in vocals and certain instruments. By intelligently detecting and reducing excessive high frequencies, the 228 helps achieve a smoother overall sound while preserving the natural tonal characteristics of the audio. This is especially beneficial in vocal tracks, where clarity and presence are crucial.

Another notable characteristic of the Aphex 228 is its inclusion of the Aural Exciter technology. This feature enhances the perceived brightness and detail of audio signals without the harshness typically associated with equalization techniques. By introducing subtle harmonic content, the Aural Exciter creates a sense of depth and liveliness, making recordings stand out.

The Aphex 228 also offers comprehensive metering options, providing visual feedback for levels, gain reduction, and processing status through its array of LED indicators. This allows audio engineers to make real-time adjustments and ensures optimal performance in any setup.

Versatility is a hallmark of the 228, as it can be seamlessly integrated into various audio setups. Whether used in a recording studio, a live sound environment, or a broadcasting scenario, its robust design and reliable performance make it a trusted choice among professionals.

The unit supports both balanced and unbalanced inputs and outputs, accommodating a wide range of equipment and cabling configurations. Its intuitive layout and user-friendly interface mean that even less experienced operators can quickly grasp its functionality, making it an ideal choice for both seasoned pros and newcomers alike.

In summary, the Aphex Systems 228 combines innovative features and technologies to enhance audio quality, providing essential tools like adaptive gain control, de-essing, and aural enhancement. Its versatility and performance characteristics make it a valuable addition to any audio rig, ensuring professional sound quality in any setting.
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