The CA-980 preamplifier
features a tube line stage and a tube power supply that will produce a
more transparent and musical sound. It has four sets of inputs and two
sets of main outputs for flexibility.
Inside the CA-980, you will notice the same craftsmanship as found in
our other products such as point-to-point wiring and hand-soldering of
parts. Only highest quality parts and components are used in critical
applications. The extra thick military grade epoxy circuit boards are
designed to minimize component interaction.
The power supply utilizing three selected vacuum tube (1 x 5Y3, 1 x
12BH7 and 1 x EF86) incorporated with a newly design circuit. The
oversize power transformer is custom wound and a choke is also used.
There is even a metal divider that run the depth of the unit to shield
the power supply from the line stage.
The tube line stage utilizing two 12AX7 and one 12AU7 vacuum tubes.
Circuit highlights include the use of a total of ten pieces Hovland
MusiCaps®. A Swiss made ELMA rotary switch is used as a selector for
input sources and two hand built ELMA 24 stepped attenuators are used
for precise volume adjustment.
Specifications for CA-980
50,000 Ohms min, 95,000 Ohms max.
+/- 3 dB from 10 Hz to 76,500 Hz
Hum and Noise:
Maximum Output Voltage before clipping:
Total Harmonic Distortion:
30 Watts (true RMS)
1 x 5Y3
1 x 12BH7
1 x EF86
1 x 12AU7
2 x 12AX7
19" W x 14" D x 4.5" H
35 lbsJM Sound