Audio research sp 4 owners manual

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audio research

HIGH DEFINITIDN®
3900 ANNAPOLIS LANE NORTH I PLYMOUTH, MINNESOTA 55447-5447 / PHONE: 783-577-9700 FAX 783-577-0823

SP4, SP4A MANUAL
SP4, SP4A SCHEMATIC
AND PARTS LIST

August 1977

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INTRODUCTION

Congratulations on your purchase. The SP-4 stereo preamplifier was
conceived and designed for audio perfectionists. Analog Module"
circuitry provides unequaled performance under actual dynamic listening
conditions.

In addition to the normal complement of features, the SP-4 has:
provisions for an optional (*) low level head amp, alternate compensation
of magnetic (mag 2) phono section, l600 watt relay controlled power
outlets, main output turn-on delay, high quality anodized aluminum
panels, knobs, and handles, and a scuff-resistant chassis finish.

Conservative design and extensive use of high quality industrial grade
components insure many years of trouble-free performance.

WARRANTY

A limited 90-Day Warranty (from the date of purchase by the original purchaser)
is provided by Audio Research Corporation. This warranty is subject to the
conditions and limitations stated within the documents attached to the outer
shipping carton.

LIMITED 3-YEAR WARRANTY

A 3»Year Limited Warranty Application is included with the documents attached to
the outer shipping carton.

THIS LIMITED 3-YEAR WARRANTY WILL NOT BE ISSUED OR EFFECTIVE UNLESS WITHIN THIRTY
DAYS AFTER THE DATE OF SALE THE PURCHASER MAILS TO AUDIO RESEARCH A LIMITED
3-YEAR WARRANTY APPLICATION FORM WHICH HAS BEEN COMPLETED, DATED AND SIGNED BY
BOTH THE SELLING DEALER AND THE PURCHASER AND A COPY OF THE BILL OF SALE OR
OTHER PROOF OF PURCHASE OF THE PRODUCT.

WARNING - FAILURE TO COMPLY WITH THE ABOVE CONDITIONS WILL RESULT IN THE
WARRANTY BEING RESTRICTED TO THE LIMITED 90-DAY WARRANTY.

PACKAGING

Save All The Packaging - Your Audio Research component is a precision electronic
instrument and should be properly cartoned any time shipment is made. You may
never have occasion to return it to the factory for service, but if such should
be necessary, or other occasion to ship it occurs, the original packaging may
save your investment from unnecessary damage or delay.