Krell pam 7 owners manual

Page 1

'January 1, 1988

.13- INDUSTRIES,
N liggins Drive
10: 6&3924

KRELL INDUSTRIES, INC.
PAM-7 PREAMPLIFIER
OWNER'S MANUAL

INC.
Milford CT 06460
FAX 203.878.8373

203.874.3139

:9.n;p«

m Jul-,1

Page 2

THE PAM-7 PREAMPLIFIER

A. INTRODUCTION

Thank you for purchasing the PAM-7 preamplifier. The PAM-7 is
the latest evolution of KRELLs' entry level preamplifier tech-
nology. Many of its design concepts are similar to our more
expensive preamplifiers and are wholly unique to KRELL. Two
important design features are dual-mono operation (two separate
power supplies are included) and the complete absence of any
capacitors in the signal path. The PAM-7 retains other features
for which KRELL preamplifiers have become recognized: internally
switchable loading for moving coil cartridges. a 3 pole adjust-
able phase filter for the CD input, and input capacity rarely
found on high-end preamplifiers.

Please read this manual thoroughly before using the PAM-7.
Its installation and operation are easy to understand and it
should provide many years of trouble-free performance. Please
be sure to return the enclosed warranty registration card.

3. UNPACKING

While unpacking the PAM-7 inspect the unit for shipping

damage. If any damage is evident contact your dealer or the
factory immediately. If the unit is in proper condition proceed
with installation. In addition to the preamplifier and two
power supplies you will find a small allen driver for removing
the top cover for phono loading and CD input adjustments.

The phono and CD sections should be set-up before installation
is completed. These operations are detailed below.

C. PHONO SECTION SET-UP

1. Moving Coil: The PAM-7 is shipped with the phono section
set for moving coil cartridges (SI, positions CZ & CA) and a
load of 100 ohms. The load can be changed with a set of inter-
nal switches. To access these the top cover must be removed
with the supplied allen driver; see the drawing at the end of
the instructions for the location of switches 32 & 83. Change
the phono loading for your cartridge according to the direc-
tions of the cartridge manufacturer or your dealer.

The various load possibilities are detailed below:

all switches in the open position

- 47.000 ohms
all switches open except 8 on - 1,000 ohms
all switches open except 7 on - 800 ohms
all switches open except 6 on - 470 ohms
all switches open except 5 on - 250 ohms
all switches open except 4 on I 100 ohms
all switches open except 3 on - 47 ohms
all switches open except 2 on - 25 ohms
all switches open except 1 on - 10 ohms
all switches on -

5 ohms a