Duncan 84-50 Tube Owner's Manual

84-50 TUBE AMPLIFIER

SEYMOUR DUNCAN

OWNER'S MANUAL

5427 Hollister Ave.

Santa Barbara, CA. 93111

Ph. 805.964.9610

Fax [phone]

CAUTION

To prevent electrical shock, do not operate this unit in wet or

moist areas. There are no user serviceable parts inside.

(See, "Maintenance"' and "Tube Chart" sections for user

maintenance procedures.)

The 80-50 Tube Guitar Amplifier
Power Output: 50 watts @ 5% THD with 1khz input.
Power Circuit: (4) EL-84 vacuum tubes.
Input Impedance: I meg O
Overall Gain @ full output.

Low gain channel - 59dB
High gain channel - 88dB all (boosts disengaged)

Power Amp Signal to Noise Ratio: 9OdB typ. referred to full output
Boosts:

Boost #1 - +6 dB @ 1khz
Boost #2 - +8 dB @ 1kflz
Crunch Boost - +8 dB @ 6kHz

Speaker Options: Seymour Duncan King Tone Classic 12" (50 Watt)
Seymour Duncan King Tone Classic 10" (50 Watt) X 2

Voltage Requirements:

I 00v - Japan
120v - U.S., Canada
220v - Europe
240v – UK

Weight: lxl2" - 44 lbs. 2xlO" - 49 lbs. head - 30 lbs.
Dimensions: Combos - 22.625" x 17.5" x 9.5"

Head - 22.625" x 9"x 9"

Congratulations on your purchase of the Seymour Duncan Research 84-50 Tube
guitar amplifier. The 84-50 is the product of an intense research and
development effort. Our object was to provide guitarists with an affordable,
all-tube amplifier, which sounded great.

The 84-50 is based on classic principles of tube guitar amplifier design. An
all-tube preamp drives a quartet of EL-84 power tubes, which provide the
sweetest, most musical tone possible. The rectangular cabinet shape enhances
the spacious "breathing" quality of the sound. Features such as on-board reverb
and a buffered effects loop make the 84-50 a simple, functional rig, which can
adapt to any musical situation.

Read this manual carefully to familiarize you with the features and operation of
the 84-50. Your new amp will provide years of troub le free performance, great
tone and musical fun.

PERFORMANCE APPLICATIONS AND GUIDELINES

The name of the 84-50 Tube amp reflects its design - the amp uses a quartet of
EL-84 type tubes to produce 50 watts of power.

The EL-84 tube was chose n specifically for its rich, sweet tone qualities, especially when
pushed to distortion. This tube was widely used in many early amplifiers, but it is most
famous for its use in the Vox AC -30. This was the amp used on the early Stones,
Beatles and Yardbirds records. The EL-84 has a wonderful musical character - it sings, it
growls, and it has great dynamic response. The harder you play, the more it distorts and
sustains. Back off on your attack and it "idles", cleaning up the sound. In short, EL-84's
are a ton of fun!

The first thing you'll probably notice about your amp is that it's very loud for its size. We
wanted to make an amp for the working guitarist - something that could cut it in most
club and casual gig situations. The 84-50 has more than enough kick to keep up with a
loud drummer and bass player. In fact, when we were testing prototypes in clubs
around town, the 84-50 had no trouble holding its own on a stage full of 100-watt amps.

Using the 84-50 live is simple. Just use your ears to dial in the EQ settings you need,
depending on the type of pickups in your guitar, the demands of the job, etc. Switch
channels to find a balance between clean and overdrive settings. A typical lead/rhythm
sound setting might be:

EQ/TONE CONTROLS

Even though both channels share the same tone controls, the 84-50 Tube
amp has been carefully voiced for a smooth natural transition between channels. By
switching back and forth a few times and adjusting the gain controls of each channel,
it will be easy to get the proper tone and volume balance between clean and
distortion sounds.

GAIN BOOSTS

The 84-50 has two gain boosts and a Crunch Boost, which are activated, by push -pull
pots on the front panel. Pulling out the overdrive control of Channel One actives a subtle
6 dB boost in both channels. Pulling out the OD control on Channel Two activates a