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Altec Amplifier Specification section

 

 

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Altec 1407A and 1415A Power Amplifier

(page 4)

 

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Altec 1407A 1415A Amp page 4

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ARCHITECT'S AND ENGINEER'S SPECIFICATIONS

The power amplifier shall be a monaural amplifier of solid state design employing true complementary symmetry output circuitry and capable of operating from a 100, 120, 200, 220, or 240 vac, 50/60 Hz line. The amplifier shall provide a plurality of balanced transformer output taps as well as an unbalanced direct output, and a bridging input transformer for input isolation. The amplifier shall contain sensing circuitry to provide protection for the output transistors against over temperature, excessive output voltage, radio frequency interference, excessive output current, and excessive output phase shift. The load shall be similarly protected against subsonic signals, startup/shutdown transients, low AC line voltage, and DC.

Rear mounted panel controls and switches shall include an input level control, a 300 Hz high pass filter in/out switch, and an attenuator in/out switch. The attenuator, when engaged, shall attenuate the input level by 15 dB. Input connectors shall include a 5-lug screw terminal connector and a 3-pin XLR female connector for balanced inputs, and a phono connector for unbalanced inputs. Output connectors shall include a 3-pin XLR male connector, two phono connectors as auxiliary unbalanced outputs, and a 7-termina! barrier strip connector.

Front panel illuminated indicators shall includea power on/off indicator, a signal clipping indicator, and a protection circuit activation indicator. The front panel control shall be the power on/off switch.

The amplifier shall include an input bridging transformer with a nominal input impedance ot 15 kQ. A power output isolation transformer shall provide balanced outputs of 25 volts (4.2 Q load), 8 ohms (34.6 volts), and 70 volts (33.3 S2 load) (1415A), or 4 ohms (17.3 volts), 25 volts (II.3 i2 load), and 70 volts (66J 0 load)
(1407A) :

The power amplifier shall meet the following pertormance criteria. Maximum input voltage: 9.75 vrms (pad out). Input voltage for rated output power: 0.775 vrms (MASTER at maximum). Rated output power (direct output): 150 watts trom 20 Hz to 20 kHz at less than 0.1% THD (1415A), or 75 watts from 20 Hz to 20 kHz at less than 0,1"s. 1HD (1407A). Minimum load impedance (direct power output): 4 0 (1415A) or 8Q (1407A). Hum and noise: at least 100 dl-) below rated output power (A weighted). Damping tactor- greater than 50 trom 20 Hz up to I kHz Intermodulation distortion i5~ti1PTEl: less than 0.0 HeatGenerated (at 1/3rd rated output power): not more than 680 BTU/hr (1415A1, or 340 f3iU/hr (1407A). Operating temperature range: up to 60 °C (14U °F) ambient. Dimensions: 5H x 19" W X 12' />" D. Net weight: 30.8 lbs (1415A), or 24.2 lbs (1407A). Color: black. Enclosure: Rack mountable ehassK

The power amplifier shall he the ALTEC LANSING Model 1415A (or the ALTEC LANSING Model 1407A).


 

 


 

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