What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Altec Lansing model Nineteen

We,ve done some intense research into speaker performance limits, resulting in rarical new technology in our high frequency drivers ... the radical phase plug, the key to the Nineteen's versatility. This sharp contrast to conventional phase plug design is the innovative force behind the wide-range capability of the Model Nineteen, offering a system providing the ultimate in fullrange response.

If you're looking for extremely low distortio, top power capacity plus extended bandwidth - look no further. The Ninteen offers all of the bandwidth advantages with none of the crossover problems found in many floor-standing three-way systems.

The result: a powerful two-way system with unegualed high-end plus commanding low-end response.

The Nineteen also features a dual-range equalizer designed to allow smooth, gradual equalization, compensating for variations in room acoustics or personal listening tastes.

Its owerwhelming full-range capability and response is aided by an optimally tuned, vented enclosure, the product of more exhaustive investigation, which makes the Nineteen ideal for home listeners who want studio-monitor performance and quality.

And, the Nineteen's beautifully-styled oiled oak or walnut cabinet, hand-rubber and finished on all sides, makes it an integral part of any listening environment.

Altec Studio Monitor Speaker Systems are designed to meet the stringent specifications of extended frequency response, low distortion and wide dynamic range that are required for use in recording and broadcasting studios. The bass loudspeaker produces extended low-frequency response even when driven at exceptionally high power levels. Two frquency adjustnent controls (high and mid-range) are provided to adapt the Studio Monitor Speaker Sysyems to a wide range of acoustic enviroments, including audition rooms, recording studio control room monitoring, mastering and remix rooms, playback and monitoring broadcast studios, auditoriums, theatres, churches, conference rooms and other professional applications.

All of these Studio Monitor Speaker Systems combine excellent overall bandwidth, low distortion, uniform dispersion and extended frequency response. For applications where sensitivity and acoustic output are of major importance, the Model Nineteen should be used.

Frequency Controls

two frequency controls are located on the network/equalizer assembly, behind the grille. When the controls are positioned in the Optimum area of adjustment, a 'flat' frequency response is obtained for most acoustic environments.

When the HF Level control is turned counterclockwise from the Optimum area, the higher frequencies are 'rolled off' or reduced in volume. This enhances the bass and mid-range frequenties.

When the MF level control is turned counteclockwise from the Optimum area, the mid-range frequencies are attenuated, producing a 'dip' in the mid-range portion of the audio spectrum. This enhances the bass and treble frequencies. Turning the control clockwise from the Optimum area enhances the mid-range frequencies.

Maximum range of the two controls is nominaly 14 dB. Upon inspection of the curves , some interaction is seen between the two controls. This control interaction prevents extreme imbalance between mid to high response, and assures minimum phase shift through the crossover network.



LOW FREQUENCY: 15'' bass driver (416-8B)

HIGH FREQUENCY: Radial phase plug, driver mounted to 811B sectoral horn





99 dB SPL (measured with shelving controls set at optimum);

102 dB SPL (measured with shelving controls fully clockwise).



105⁰ at -6 dB Horizontal;

105 at -6 dB Vertical.

LONG TERM BROAD BAND MAXIMUM POWER (³): 65 watts (measured with shelving controls set at optimum)

AMPLIFIER OPERATING RANGE (Recommended maximum and minimun amplifier power): 10 watts to 350 watts


FINISH: Hand-rubbed, oiled walnut or oak

GRILLE: Acoustically-transparent knit fabric mounted to removable frames

DIMENSIONS (W x H x D): 30" x 39" x 21" with base and grille


Net: 64,9 Kg (143 lbs);

Shipping: 72,3 Kg (166 lbs)

(¹) - Measured at 4 feet, 1 watt input, using pink noise which has been limited to a bandwidth of 500 Hz to 3 kHz

(²) - Measured with pink noise limited to a bandwidth of 500 Hz to 8 kHz at a distance of 4 feet

(³) - Measured with a source of pink noise limited to the frequency response bandwidth of the system, over an extended time period

(⁴) - Measured at a distance of 4 feet with a source of pink noise limited to the frequency response bandwidth of the system

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