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

Dahlquist DQ-10

 Critics and audiophiles agree - the listening quality of the DQ-10 is unexcelled. What accounts for its superb performance?
Time - Much credit for its smooth coherence must be given to the precisely matched transient characteristics of the five drivers. And, a good deal has been written about the DQ-10  and its extraordinary solution to the problems of time delay or phase distortion. It is not surprising that other high quality speaker designers have followed suit in offering their versions of time delay correction.
… and Time Again - The real "secret" to the unprecedented performance of the DQ-10 lies in Jon Dahlquist's patented method for reducing diffraction, a more audible and destructive form of time distortion. The separate baffle plate on which each driver is mounted is dimensioned to minimize diffraction in the frequency band in which it operates. Thus, the effect of the sound we hear is that of a driver mounted in free space, without obstructions or surfaces to distort the original sound source.
 it can be said that the DQ-10 eliminates inaccurate reproduction caused by time elements - inertial time delay, and diffraction time delay - distortions that limit the performance of conventional speaker systems.
"That's why the more critical listener will select the DQ-10. Time and time again".
 What accounts for the superb performance of the DQ-10?
The precisely matched transient characteristics of its five drivers are one reason. The rugged crossover, using oversize components and now equipped with mylar capacitors is another.

But the DQ-10 reproduces music with unprecedented clarity and spaciousness. The explanation lies in Dalquists solution to the problems of time delay and diffraction delay distortion.
Here is the speaker system that eliminates inaccurate reproduction caused by time elements.

 Conventional Driver Mounting - in a common flat baffle. Smaller drivers have lower mass and shallower cone surfaces. High frequencies arrive earlier than lower frequencies, harmonic overtones before fundamentals. This is time delay distortion.

The Dahlquist Solution - With Phased Array™ Mounting, drivers are positioned so that all frequencies (fundamentals and harmonic overtones) reach the listener at the same time. Musical sound is in phase.


Diffraction Delay Distortion - In conventional speaker systems, sound wave energy radiates across the speaker baffle to the edges of the cabinet and is diffracted. These secondary signals create unnatural exponential decay and destroy clarity and spaciousness.

The Dahlquist  Solution - In the DQ-10, the staggered baffle plates are sized to minimize diffraction. It is as though the drivers are mounted in free space with no nearby obstructions to distort the pure sound source. Sound decays naturally.

 Hi-Fi doesn't have to become "habit-forming". And yet, equipment which sounds fine when you first purchase it, often sounds "flawed" over time. Most likely, the equipment doesen't deteriorate - your listening becomes more acute.
The break the "speaker-switching habit", select loudspeakers that have demonstarated their ability to satisfy critical listeners over long periods of time. The Dahlquist DQ-10's have earned consistent "rave" reviews from their introduction in 1974 to this date.
You still may want to upgrade your system in the future, and Dahlquist loudspeakers are designed to grow with you. The DQ-10's interface perfectly with the Dahlquist DQ-1W sub-woofer. By using the Dahlquist MX-1 (Passive Matrixing Crossover), you can add a DQ-1W to your system without requiring an extra amp. With the Dahlquist LP-1 (Variable Low Pass Filter), you can add either 1 (mono) or 2 (stereo) DQ-1W's as part of a bi-amplified system.

Frequency Response:  37 Hz - 27,000 Hz
Power Requirements:  50 - 100 Watts minimum (will handle 200 watts program material)
Drivers:  Five per system - Mirror image configuration
Crossover Points:  400 Hz, 1 kHz, 6 kHz, 12,5 kHz
Nominal Impedance:  8 Ω
Input Connectors:  Dual 5-way binding posts. Will accept dual banana plug
Protection:  Line fuse; tweeter fuse
Dimensions (W x H x D):  30,5" x 31-5" x 9"
Weight (shipping):  60 lbs
Finish:  Black cloth grille with solid American walnut side pieces; or white cloth grille with solid American oak side pieces. Stand available in walnut or oak.

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