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


The 180-watt per channel R18 Receiver from SAE TWO.

It's like no other receiver you've ever seen. Or heard. It's a spectacular blend of all the state-of-the-art technology and innovative features that are SEA TWO. Aside from the digital read-out quartz lock, synthesized touch tuning, parametric equalization, and a lot more, the R18 offers a number of exceptional capabilites:

Five station memory allows you to pre-set your five favorite AM and five favorite FM stations.

Weather, sports, rock, whatever. Just press the memory button and they're yours. No hunting. No switching. No hassle.

A full time clock gives you the time whether the main power is on or off. It's continuos read-out, digital of couse.

But there's more. Much more. As a matter of fact, you couldn't find more in one receiver if you tried:

Digital Readout

Quartz Lock

Synthesized Touch Tuning

Parametric EQ

Bar Graph Display

External processor Input

Tape EQ

Digital Clock

Infrared Remote Control

Single Strata Voltage Amplifier

Fully Complementary Outputs

Relay Speaker Protection

Thermal protection

Moving Coil Input

Fluorescent Bar Graph Display

used for AM/FM tape, and power monitoring these low-voltage fluorescent displays react instantaneously to level changes without the ballistics problems common to conventional VU meters.

In the AM or FM mode, signal strength is displayed for both as well as multipath distortion for FM.

In the tape mode the level appearing at the tape record outputs is indicated referenced to 0 VU. You can actually improve your recordings by using the monitoring system as a guide. In the power mode, the fluorescents directly display the power level of the receiver from less than 1/10th of a watt to full output.

Digital Frequency Readout

Conventional receivers have continued to use the less accurate and informative "slide rule" style dial.

Instead, we looked at the most sophisticated instrumentation in science and industry and found the overwhelming preference for measurement display systems to be digital. Simply stated, with our new digital readout system, you never have to wonder what station you're listening to.

Quartz Lock Reference

In FM the IF bandpass filter is the heart of the tuner. It removes noise and distortion.It pretty much determines the fidelity of the system. For the IF to operate propery, the signal must be positioned and maintained precisely at the center of this bandpass. That's where the quartz lock comes in. It centers the signal more accurately than any other known system. Inn fact, it's the method the radio stations themselves usel. Regardless of signal, temperature or the age of the equipment, the quartz reference systems will always center tune the FM signal for lowest distortion, widest separation and greatest rejection of unwanted noise.

Synthesized Touch Tuning

We utilize the latest in Varactor front end and LSI (Large Scale Integrated) technology. The Veractor front end, not restricted by the mechanical constraints of conventional front end designs, is structured for optimum performance. All voltage circuitry for scanning and tuning is generated within the LSI chip itself. It tunes and centres the signal automaticaly, activating the quartz lock reference and monitoring the front end to obtain optimum signal reception. A simple touch of either of two tuning buttons instantly tunes and locks the desired station.

External Procesor

It provides a separate loop for signal processing and modification devices, like parametric equalizers and noise reduction systems, allowing you to take full advantage of the many such instruments and their varied benefits. You can equalize your tapes: the external processor loop can be placed between selected inputs (phono, tape aux) and tape outputs. Or modify any specific input, including tape.

Tape EQ

Here you are able to take full advantage of your built-in parametric equalizer capability by using it to equalize what you're taping. This is especially valuable if your're tailoring tapes for automobile systems, background music, etc.

Single Strata Voltage

As you may know the power amplifier is broken down into two components: the voltage gain stage and the power stage. In voltage gain, there are two critical criteria: gain and thermal stability. The individual devices must track thermally to maintain linear gain for low distortion and excellent stability under all conditions. Previously, this has been extremely difficult to accomplish as the active components could not be grouped together. Now our unique Single Strata Voltage Amplifier overcomes this by maintaining all active components of the voltage stage on a single strait. Complete current sourcing of input stages, and a fully complementary pre-drive stage with high Ft devices combine to from a voltage amplifier stage more sonically accurate than ever before thought possible.

Complementary Output Stage

We afforded the output stage the same careful attention with which we handled the voltage amplifier section. We use full complementary, Very High Speed Series outputs with 15 MHz Ft and a power handling capacity greater than eight times the rating of the unit. In order words, it's fast. It's strong. It can handle any speaker load.

Low Noise Phono IC's

A recent breakthrough in low noise IC technology makes this fully complementary operational amplifier the ideal phono stage. With complete supply isolation and individual current sources for each stage, noise modulation and distortion are virtually a thing of the past. Active devices are designed for wide gain-bandwidth to ensure low transient distortion and excellent overload recovery. Careful attention has also been paid to the RIAA equalization both inside and outside the audible band for completely stable phono cartridge loading.

Infrared Remote Control

Optional remote control offers you convenient turn on, balance, volume and tuning.

Specifications (IHF-202A, 1978 STD.)

Power (into 8 ohm from 20 - 20,000 Hz): 180 watts

Total Harmonic Distortion (from 250 mW to full rated power is less than): 0.05%

Intermodulation Distortion (SMPTE STD< 250 mW to rated output, lesss than): 0.05%

Power Bandwidth (1 kHz, 0.1% THD, 8 ohms): 10 Hz - 60 Hz

Damping Factor (1 kHz, 8 ohms): >40

Frequency Response:

Phono MC: ±0.5 dB

Phono MM: ±05 dB

Aux, Tape, Ext Pros: ±0.5 dB (20 Hz - 20 kHz); +0.5/-3 dB (5 Hz - 100 kHz)

Signal to Noise Ratio (IHF-A):

Phono MC: 80 dB

Phono MM: 84 dB (5 mV, IHF load); 94 dB (10 mV, shorted)

Aux, Tape, Tun: 80 dB (1 watt output); 100 dB (rated output)

Residual Noise (IHF-A): 10 mV

Input Sensitivity (1W/ Rated Output/Impedance):

Phono MC: 0.01 mV/0.25 mV/500 ohms

Phono MM: 0.11 mV/2.5mV/47 kohms

Aux,Tape, Ext. Pros. Tuner: 6.7 mV/150 mV/50 kohms

Output Level - Tape Out, Ext. Pros: 150 mV

Maximum Input Level:

Phono MC: 12 mV

Phono MM: 150 -300 mV

Aux, Tape, Ext. Pros., Tuner: 4 V

Parametric EQ


Level: ±16 dB

Frequency: 20 Hz - 1.2 kHz

Bandwidth: 0.3 - 3.6 oct.


Level: ±16 dB

Frequency: 1.2 kHz - 20 kHzz

Bandwidth: 0.3 - 3.6 oct.

Filter: 6 dB/octave at 30 Hz

Loudness Compensation (level -30 dB): =6 dB at 10 kHz, +8 dB at 100 Hz

Audio Muting: -20 dB

Volume Tracking Error (0 - 70 dB): ±1 dB

Dimensions (W x H x D): 559 x 165 x 457 mm (22 x 6½ x 18 inch)

Weight: 25 kg (55 lbs)

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