TEST: Manley Core

 In the past, if you looked at the control room in the top category reference sound studios, you would not only find an expansive console, but also at least four 20 U racks in which the finest outboard gear monitored the sound refinement in the form of dynamics processors, equalizers and noise gates. These times are long gone due to the logarithmic growth in computing power of home PCs in recent years. Multi-cores and triple-digit RAM numbers take over the work by means of internal plug-ins, which used to be diverted to the external processors with considerable effort via corresponding patch panels.

One could think that the vast majority of 19 inch equipment has left the recording studios for all time. But wait, one representative is bravely resisting its extinction and will probably not enter the eternal hunting grounds anytime soon. We're talking about the Channel Strip, which, in addition to a classic preamp function, also has a compressor, an equalizer and sometimes a limiter function. Especially in the field of vocal recording, the most important parameters can be optimized right in the first signal stage, before it goes into the conversion.

In addition to some other competitors, which with the exception of companies such as SPL are almost without exception based in the USA, the company Manley has a very good reputation in the professional field and has already created a classic with the Voxbox. With the Manley Core, the American company, which has been on the market since the late eighties, now offers a somewhat reduced version of the Voxbox, although it is pointed out several times in advance that the tube circuit of the flagship has been adopted. A real Manley for under 2,000 euros? With manufacturing in the USA? That makes curious.


Design

Like many other Manley products, the Manley Core is also based on a tube input stage, which together with a compressor, an equalizer and a limiter result in a single-channel channel strip that has the most important signal processing parameters. The Manley Core is packaged in a 2 U 19 inch rack insert, which also has four small rubber feet and has been dipped in a deep blue color. The case is very sturdy, especially the front panel leaves a very solid impression.

On the left side of the front panel, the most important input controls, respectively pressure switches were arranged, which are as follows:

Input control with a pre-amplification of up to 60 dB
input impedance selector switch microphone or line signal
a quite high set subsonic filter of 120 Hertz
a high or low gain selector switch (high: up to +40 dB, low: up to +20 dB)
phantom power 40V

All pressure switches are equipped with white backlighting. In addition, the input for high-impedance signals is located below the push switches.

Both the input regulator, as well as all other still following potentiometers, run extremely smoothly and sensitively, so that one can approach the desired settings precisely. In contrast to many other preamps, which are designed as classic catch-up amplifiers, the Manley Core Input controller works with two double triodes of the types 12AX7 and 6922 in cooperation with fixed preamps as level reducers.

The next stage is the compressor section, which has only three controls. Besides the degree of compression, the attack speed can be set from 5 - 60 milliseconds and a release speed from 100 - 1500 milliseconds. The popular input or makeup controls are not in the concept of the Manley Core. In terms of circuitry, Manly once again relies on the company's internal ELOP system, which is based on the use of an optical control element and is also responsible for the missing specifications in the attack and release range. Also the fixed ratio factor of 3:1 underlines Manley's very own approach to a compressor.

In order to prevent the tube stage from accidentally clipping under any circumstances, the compressor stage was placed before the actual tube stage, which means a guaranteed safeguard for the signal flow when the compressor is activated. However, this only takes effect when the compressor is activated, which can be deactivated by a toggle switch.

Another special feature is found in the equalizer section. Two shelving filters plus a bandpass equalize the signal as desired. The 90 Hz of the low filter still corresponds to a large extent to the broad taste, the high filter however works despite its center at 12 kHz down to 3 kHz, which is rather an exception. The maximum gain here is +/-12 dB. The bandpass on the other hand is very flexible, the frequency can be selected between 100 - 1000 Hz, or from 1 kHz - 10 kHz, both optionally +/- 10 dB.

The last link in the chain is a FET limiter, which works with a threshold and a fixed attack time of 115 microseconds. The release range can be controlled from 2.3 to 300 milliseconds. The last control unit is an active amplifier stage, which is adjustable from -6dBu up to +4dBu.

All balanced inputs and outputs are located on the rear in the form of a microphone and line input in XLR design and a direct out, respectively main out. The Direct Out picks up the signal behind the input and compressor section, while the Main Out runs through the complete signal chain. Additionally, there is a loop-in point in the form of an unbalanced Y-TSR connector to place additional signal processors in the signal path.

Finally, the front of the Manley Core's cabinet is dominated by a generous VU meter, which uses toggle switches to display the levels of the Direct Out, the Main Out or the gain reduction of the compressor. In contrast to the classic dark yellow, the display is dipped in a dignified blue.

The switching power supply of the Manley Core is completely new, which not only produces the necessary 300 volts for the tube voltage, but is also compatible with all international power grids from 100 to 240 volts at 50/60 hertz.
Practice

Even though the Manley Core operates rather in the moderate price segment by Manley standards, it would still be a lie to say that a decent expectation hadn't built up in me. A Channel Strip that only sounds "good" would simply be too little in this category. But no worries, it came as it had to come.

Due to the clear and concise design of the product, you can indeed get started right away and will not be disappointed. Both in the vocal and instrumental range, the Manley Core knows how to convince, especially since the tube characteristic is omnipresent in the sound. The intuitive approach facilitates many things, but also requires a certain routine in the workflow.

Sonically, the Manley Core offers a pleasantly soft basic sound without slipping into the "sloppy". Even without compressor, equalizer and limiter, the tube stage already strongly enhances the output signal and refines it with a touch of shine. The sluggish response of the compressor will surprise some at first, but in return you get a wonderfully smooth transient phase, which forms a very unique character.

The equalizer section works quite neutrally in terms of coloration, but for me personally the treble shelving filter is a bit too low and leads the high mids a bit too much in the control path. This is well noticeable in vocal recordings. The limiter is a good addition, but it requires some caution in handling. If you misunderstand the limiter as a makeup component, you will quickly be punished with distortions. With a discreet approach, however, it increases the assertiveness factor of the signal enormously.

 
Conclusion

With the Manley Core, one of the big American studio names offers a very good channel strip in the moderate price segment. Despite a retail price of less than 2,000 euros, the customer does not have to do without the classic, "American" sound, which has always been characterized by a soft basic sound paired with high density in the output signal.

Due to the clearly kept interface, one can very quickly turn to an intuitive way of working, which usually offers the best results in terms of sound. A very flexible product, which knows how to handle vocal as well as instrumental signals.

Recommended in every respect!

Additional Informations:

Manley Audio is a prominent audio equipment manufacturer known for its exceptional craftsmanship and commitment to producing high-quality audio products. Founded in 1989 by David Manley, the company has garnered a reputation for designing and manufacturing innovative vacuum tube audio gear, including preamplifiers, compressors, equalizers, and microphones. This report aims to provide an in-depth overview of Manley Audio, covering its history, product range, technological innovations, and impact on the industry.

History and Background: Manley Audio was established by David Manley, a British-born engineer with a passion for audio tube technology. David's expertise in vacuum tube electronics and his commitment to preserving the warmth and character of analog sound laid the foundation for the company. In its early years, Manley Audio gained recognition for its handcrafted vacuum tube preamplifiers and quickly became a favorite among audio professionals seeking high-quality audio gear.

Product Range: Manley Audio offers a diverse range of audio products that combine vintage tube technology with modern design and functionality. Their product line includes:
Preamplifiers: Manley preamplifiers are renowned for their rich, warm, and detailed sound reproduction. These preamps are widely used in recording studios, mastering facilities, and high-end home audio setups, providing transparent audio amplification and signal enhancement.

b) Compressors/Limiters: Manley compressors and limiters are highly regarded for their musicality and versatility. These units offer precise control over dynamics, allowing engineers to shape the sound with finesse and maintain the integrity of the audio source.

c) Equalizers: Manley equalizers provide precise tonal shaping capabilities, allowing engineers to sculpt the frequency response of audio signals. With their musical-sounding EQ curves and vintage-inspired designs, Manley equalizers have become sought-after tools for both recording and mixing applications.

d) Microphones: Manley microphones are handcrafted with meticulous attention to detail, offering exceptional sonic characteristics. Their microphone range includes both tube and solid-state models, known for their accuracy, transparency, and versatility in capturing vocals and instruments.

Technological Innovations: Manley Audio has continuously pushed the boundaries of audio technology and implemented innovative features in their products. Some notable technological innovations by Manley Audio include:

High Voltage Tube Circuitry: Manley Audio is renowned for its implementation of high voltage tube circuitry, which contributes to the exceptional audio quality and unique sonic character of their products. The use of vacuum tubes adds warmth, harmonics, and a certain "vintage" flavor to the audio signal.

b) Variable Mu Compression: Manley's Variable Mu compressors feature a variable-mu tube design that provides smooth and musical compression characteristics. This design has been highly regarded for its ability to enhance dynamics and add depth to recordings.

c) T-Bar Mod: Manley's T-Bar mod is a modification offered for some of their equalizers, which allows engineers to switch between two different sets of EQ curves, expanding the versatility and tonal shaping possibilities of the units.

d) Mid-Side Processing: Some of Manley's compressors and equalizers incorporate mid-side processing capabilities, enabling engineers to independently control the level and dynamics of the mid and side components of a stereo signal. This technique offers greater control over stereo imaging and width.

Industry Impact: Manley Audio has had a significant impact on the professional audio industry. Their commitment to maintaining the integrity of analog sound and their meticulous craftsmanship has garnered a loyal customer base of audio professionals, recording studios, and musicians worldwide. Manley Audio products are known for their exceptional build quality, attention to detail, and their ability to deliver pristine audio quality. The company's commitment to preserving the warmth and character of analog sound has also influenced other manufacturers in the industry.

Conclusion: Manley Audio stands as a respected manufacturer of high-quality audio equipment, known for its craftsmanship, innovation, and dedication to preserving the sonic qualities of vacuum tube technology. With a diverse range of products, technological innovations, and a reputation for excellence, Manley Audio continues to be a go-to choice for audio professionals seeking exceptional audio gear. As the industry evolves, Manley Audio is poised to continue making significant contributions to the world of analog audio and shaping the future of high-end audio equipment.