SAE Mark XVII equalizer

Solid State Stereo Octave Equalizer

Control - for many years the need to tailor program material to meet individual tastes has been apparent. Highly sophisticated multi-control systems have been available to meet these needs in the recording studio, on the rock stage and at the concert hall (places where you would find the 2700B). However, the need to control sound in the home has never fully been realized, due to limitations in present consumer designs. There were numerous requests for a modestly priced, quality equalizer to improve old or worn records, and to compensate for speaker performance and room conditions without degradation of sound. The Mark XVII is the answer to these requests, incorporating many of the same unique performance and convenience features as our professional half-octave equalizer,, the 2700B. For example, we use the same long throw oil-damped graphic potentiometers as the 2700B. We feel this offers better accuracy for spectral control and smoother operation. We also incorporate our famous L-C-R network which result in the best balance of performance, low noise, and reliability. The toroid inductors are precision wound at our factory and then hand picked for each model to offer the ultimate in performance.

Finally, the latest in output design is incorporated to ensure that the Mark XVII would affect the sound in no other way than that for which it was intended - the control of frequency response. The Mark XVII can deliver over 11V into a 10 k Ω  or greater load, assuring undistorted performance with any program material. SAE's unequalled talents show through in measurements too-both T.H.D. and Intermodulation Distortion are less than 0,03% and the noise is 90 dB below rated output. We feel that such a level of performance in an equalizer of this size and flexibilty is a true innovation in the audio industry.

 

Features

Octave Control

Twenty precision L-C-R band-pass filters offer octave control for each channel. Precision-wound toroid inductors, low-loss capacitors, and precision-tracking potentiometers result in low noise, low phase shift, and low distortion.

Dual Range

The individual frequency controls operate over a range of +8 dB for program equalization or +16 dB for more drastic modification to room or speaker response. These two ranges are front panel selectable.

Individual EQ Defeat

Front panel selection is available for the individual defeat of the equalization on either channel. This offers A-B comparison between speakers and between equalized and non-equalized program material. You may also simply defeat the equalizer for some program sources.

Output Drive

The high output voltage circuitry delivers over 11 Volts RMS into a 10 k Ω  or greater load. This allows the Mark XVII to be terminated into any unique load configuration without an incrase in distortion or current limiting.

 

Specifications

Frequency Response:  20 Hz - 20,000 Hz ±0,25 dB

Bandwidth:  3 dB down at 6 Hz and 80 kHz

Total Harmonic Distortion (at any level to rated output from 20 Hz to 20 kHz):  less than 0,03%

Intermodulation Distortion (at any level of rated output with any 2 mixed frequencies between 20 Hz and 20 kHz at 4/1 voltage ratio):  less than 0,03%

Signal-to-Noise Ratio :  greater than 90 dB below rated output

Rated Output:  2,5 Volts RMS

Output at Clipping:  greater than 10 Volts into 100 k Ω ; greater than 9 Volts into 10 k Ω

Input Impedance:  100 k Ω

Output Source Impedance:  400 Ω

Output Load Impedance:  10 k Ω  minimum

Insertion Loss:  less than 1 dB with controls centered

Equalizer Range:  ±16 dB or ±8 dB at : 40 Hz,  80 Hz, 160 Hz, 320 Hz, 640 Hz, 1280 Hz, 2500 Hz, 5000 Hz, 10 kHz, 15 kHz

Power Requirements:  110, 125 V AC , 50 or 60 Hz

Power Consumption:  10 watts

Dimensions (W x H x D): 432 x 146 x 178 mm (17" x 5,75" x 7")

Weight:  20 lbs (shipping)