ATC Professional SCS70 PRO

Productbeschrijving

The ATC SCS70 Proand SCS70iW Pro are two newhigh-performance 12"/300mm active subwoofers, designed to deliver the exceptional levels of performance demanded by audio and music professionals and integral to partneringwithATCs range of active studio monitors.Theirperformance and features make themideally suited to stereo, multi-channel surround, and immersive audio formats such as Dolby Atmos.TheSCS70 Prohas been designedfor use free standing andthe SCS70iW Pro has beenoptimised and includes featuresideal for flush/in-wall mounting.

Technology
ATC has a rich history of developing loudspeaker systems from component level up and the SCS70 Pro is no different. The subwoofer features a new ATC designed & built sub-bass driver, engineered foroptimal reproductionof the lowest four octaves of the audio band. To best achieve this,it is designed witha30mm magnetic gap,50% longer than any other offered by ATC. The long-gap and short-coil configuration takes a long-standing ATC design feature to its limit, ensuring magnetic non-linearities are minimised, while simultaneously delivering the high linear excursion required to generate accurateand dynamiclow frequencyoutput. Generating a high level of magnetic flux over such a long gap required extensive FEA computer modellingand the resultant 6"/150mm N48MNeodymium magnetis the most powerful ever assembled by ATC and a first for the company. As well as minimising distortion, the short-coil long-gap configuration ensures the voice coil remains surrounded by the steel motor structure-even at high drive levels-maximising cooling, reducing power compression, and improving reliability. Turbulent air noise within the driver is minimised via a large, flared vent running through the centre of the motor structure, which has the added benefit of increasing voice coil and motor cooling.

The SCS70 Pro subwoofer delivers an extended low-frequency response without employing electronic equalisation, quite unlike many subwoofers available today. Instead,the more elegant combination of exceptional transducer engineering and a marginally larger cabinet volume is used. The simplicity of this approach reduces phase shiftand group delay, aiding the integration of the sub with the partnering monitor loudspeakers. Ultimately,itdeliversa more balanced and coherent experiencefor the listener, extending the low-frequency response without masking details or changing the tonal character in the upper bass/lower mid-range.

Drawing on 34 years of experience in amplifier design and development, ATC's electronic engineering team have delivered an all-new amplifier for these twonewsubwoofers. The 300W class AB design is hand-built by ATC at their UK facility and preciselyoptimised to the requirements of the driveunit, resulting in fast, dynamic bass with minimalcolouration.Two balanced inputs provide connectivity suited to both stereo and multi-channel/immersive audio systems plus two balanced outputs provide connections to monitor loudspeakers or to 'daisy-chain' multiple subs.Low-pass filters are analogue, 4th order Linkwitz-Rileyand filter frequency options ensureoptimal integrationwith a widerange of studio monitors.An industry-standard 80Hzlow-passand an 'off' option (for use with external processing)are also provided.A polarity switch plus a continuously variable 180°phase adjustment allows further optimisation of the subwoofer crossoverand a steppedattenuator with a 21 dB range provides preciselevel matching.

Features
Integrating active subwoofers designed to operate ‘free-standing’ into control rooms designed for flush/in-wall monitoring can be a challenge, but the SCS70iWPro(In-Wall) isdedicated tothis application, simplifying installation,and ensuring optimal performance.A shallower cabinet and recessed input connector panel maximises floor space and a remote mounted 7U/19” amplifier(R1-300 Pro)offers the user the flexibility to install in-wall close to the subwoofer, in a control room rack or in a machine room. Connection between the in-wall sub and remote amp is via NL4 speaker cable and 5-pin XLR cable (sold separately& available in multiple lengths).

Extending the low frequency response of a monitoring system brings many advantages,butoccasionally,reducing the amount of bass energy in the control room allows the listener to focus on a particulartaskhigher up in the audio spectrum. TheSCS70 Prooutput mutefeaturemakes this quick and easy, with ‘mute’ toggledvia a single latching footswitch (connected via a ¼" / 6.35mm jack). In addition, multiplesubwoofers can be muted using the same footswitch,connected viathe mute 'Thru' jack.

In-Use
The size and performance of the SCS70 Pro make it the ideal partner for a wide range of ATC monitor loudspeakers, from the SCM12 Pro up to and including theSCM50A Pro.Multiple subs can be employed to elevate performance, to fill larger roomsandalso when partnering with larger models of loudspeakers.Buffered linkable inputsand outputsmakes connectionof multiple subs simple as does thelinkable ‘mute’circuit. Surroundand Immersive Audio formats can be particularly demandingof subwoofersand these two new designs both offer improvements in dynamic range and clarity at higher SPLs.It is recommended that Dolby’sDARDT (Dolby Audio Room Design Tool) should be used to aid the design of ATC monitoring systems for Dolby Atmos, ensuring the format guidelines are met and best possible performance is achieved.

Conclusion
Designed and engineered with a focus onresolution and integration, theSCS70 and SCS70iW Proofferusers additional low frequency extension and dynamic range but without compromising balance in the upper bass and lower mid-range.They provide an upgrade path to customers owningsmaller monitors and lackingspace for larger mid-field or main monitors whilst also strengtheningATC’s options in surround and immersive audio applications.Whichever way anyone chooses to use them,the newSCS70 Pro and SCS70iW Pro are two strong additions to the Professional Series product line-up.

Acoustic Specifications

Drive Unit – Bass: 1 x SS75-314SC 8O.O
Low Frequency Cut-off: 22Hz (-6dB, half space, low pass filter set at 80Hz).
Low Pass Filters: 50Hz, 65Hz, 80Hz, 320Hz. (-6dB, 4th order Linkwitz Riley).
MaxSPL: 110dB continuous, 116dB peak (IEC Weighted Pink Noise, 1m, half space, low pass filter @ 80Hz).
Sensitivity: +4dBu ref 88dBC (single channel driven, Gain +6dB, Level 0dB, pink noise, low pass filter @ 80Hz).
Electronic Specifications

Amplifier type: Grounded Source MOSFET based Class A-B, convection cooled.
Output Power: 300W into 8O.
THD+N: <0.003%/-90dB, at 100Hz, 300W into 8O over 90kHz bandwidth.
Balanced Inputs: 2 x Rear Panel Mounted Female XLR, pin 2 hot.
Balanced Outputs: 2 x Rear Panel Mounted Male XLR, pin 2 hot.
Frequency Response: <2Hz (-3dB) – 320Hz (-6dB, set by panel-controlled LP filter).
Gain Control: 0, +6dB, +10dB.
Level Control: 0dB -11dB in 1dB steps. Total range 21dB with use of Gain switch.
Phase Control: 0-180° ref. Input.
Polarity Control: In-phase/Out-of-phase ref. Input.
Power Consumption: Idle 8W/14VA. 1/8th Power 170W/230VA. Full Power 500W/600VA.
Additional: Mute via ¼”/ 6.35mm Jack soket, controlled via latching footswitch (supplied separately)
Physical Specifications

Dimensions: (H x W x D): 568 x 464 x 500mm / 22 5/16 x 18 1/4 x 19 11/16 inches (heatsink protrudes a further 40mm / 1 9/16 inches from rear). See data sheet for a detailed drawing.
Net Weight: 44kg / 97lbs.