7
TUBES AND TUBE BIAS
Each A-5000 NEO uses the following tubes:
Two (2) x 300B
One (1) x 6GV8
Because of the individual bias for each 300B, it is not
necessary to use a matched pair in the A-5000 NEO.
If the current meter, when switched to one or the other of
the unit’s 300B’s, has moved to the left of the parallel lines on
the meter face, using an appropriately bladed screwdriver,
adjust the potentiometer directly in front of that tube’s
location by turning it clockwise until the needle has returned
to between the meter’s parallel lines. If the meter needle has
moved to the right of the parallel lines on the meter face,
turn the potentiometer control counter-clockwise to correct.
If the meter’s needle drops to the left limit of the meter’s
face during operation, this indicates a failure of the related
300B tube. You must turn off the A-5000 NEO and replace
both the fuse (0.5A, 250V, 20mm glass type) for that tube and
the 300B. To replace a fuse, using a screwdriver, simply turn
the top of the fuse cap counter clockwise. It will spring out
holding the fuse. Replace the fuse, push the fuse cap down
and turn it clockwise; it will lock itself. If you have any
questions about doing this, please contact Hammertone
Audio for assistance.
You may use any 300B type tube in the A-5000 NEO, including
the newer higher voltage varieties. Of course, you will have to
adjust the bias back into the area between the two parallel
lines of the meter for a tube when it is replaced. Please refer
to Figure 6 for tube locations.
All consequences of changing or attempting to change tubes
are borne by the user unless by express agreement between
the owner and Hammertone Audio. Allnic Audio and
Hammertone Audio are not liable in any way whatsoever for
any injury or loss incurred by the user or for damage to the A-
5000 NEO, any of its parts, or tubes or replacement tubes
resulting from the user changing or attempting to change tubes.
SPECIFICATIONS FOR THE ALLNIC AUDIO A-5000 NEO 300B SET
MONOBLOCK POWER AMPLIFIER
Output Power: 25w (8
Ω
or 4
Ω
load, at 1KHz)
Distortion: 0.3% at 1KHz, 2.83V
Frequency Response: 20Hz - 20KHz Flat
S/N Ratio: -80dB (CCIR, 1KHz)
Damping Factor: 10 at 8
Ω load at 1KHz
Voltage gain: +24dB
Input Impedance: 100K
Ω
(single-ended, unbalanced)
Input Sensitivity: 0.7V for rated power
Tubes: 300B X 2 (power triode)
6GV8 X 1 (driver tube - equivalent to
ECL85 and 6F5p)
AC Fuse: 15A, 250V (two supplied – one is a
spare)
Dimensions: (W x D x H) 430mm (16.93 inches) x
330mm ( inches) X 240mm
(9.45 inches)
Weight: 20Kg (44 lbs) net per monoblock.
21.8 Kg (48 lbs) shipping weight per
monoblock.
WARRANTY
All Allnic Audio amplifier products are warranted against materials and manufacturing defects for parts, excluding tubes, and
labour for two (2) years from date of purchase. Tubes are warranted against materials and manufacturing defects for one (1) year
from date of purchase. The warranty is transferable for the balance of the original purchaser’s warranty period, provided, as
stated below, no unauthorized repairs or modifications have been performed on the product. Date of purchase is the date
indicated on the invoice for the product issued by Hammertone Audio.
For the warranty to be valid, a defective product must be returned to Hammertone Audio for service prior to any unauthorized
attempt to repair. Any repair work on an Allnic Audio product not specifically authorized by Hammertone Audio will void the
warranty on the product.
