Manley TNT MICROPHONE PREAMPLIFIER - Manual (Page 4)

THE BACK PANEL
First connect all the cables, then turn on the power, wait 30 seconds, then have fun, as if we had to tell you....
1) POWER CONNECTOR. First verify the POWER SWITCH on the front panel is off (CCW). Use the power cable supplied with
your TNT. One end goes here and the other end goes to the wall outlet. You know all this.
2) VOLTAGE LABEL (ON SERIAL STICKER). Just check that it indicates the same voltage as is normal in your country. It should
be. If it says 120V and your country is 220V, then call your dealer up. If it says 120V and you expect 110 it should work fine.
3) FUSE. Unplug the power cable first. The Fuse Cap needs a push then turn a quarter twist CCW to pull off. Fuses are meant to
“blow” when an electrical problem occurs and is essentially a safety device to prevent fires, shocks and big repair bills. Only replace
it if it has “blown” and only with the same value and type (500mA slow-blow for 120V, 250mA slow-blow for 220V). A blown fuse
either looks blackened internally or the little wire inside looks broken. A blown fuse will prevent all the LEDS from lighting and will
prevent any power and audio.
4) TUBE CHANNEL XLR JACK INPUT. ( Left) Accepts balanced or unbalanced sources. The pin out is as follows: PIN 2 = Posi-
tive = Hot, PIN 3 = Negative = Low or ground, PIN 1 = Chassis Ground. Be sure that the PIN 3 is connected to the negative or ground
and not “open” or a 6dB loss or loss of signal will happen. This input is transformer coupled. Switching PHANTOM POWER on, puts
approximately 48 volts via 6.8k resistors (double regulated 46-47 vdc typical) on pins 2&3.
5) TUBE CHANNEL XLR JACK OUTPUT. (Channel One or Left) Transformer Balanced and Floating. Only for +4dBu pro levels.
The pin out is as above. NOTE: Inserting a 1/4” plug into the “UNBALANCED OUTPUT” jack disables this XLR output !
6) TUBE CHANNEL PHONE JACK OUTPUT. (Channel One or Left) Unbalanced output only. Factory set-up for +4dBu pro lev-
els and mono or 2 conductor plugs. NOTE: Inserting a 1/4” plug into this jack disables the XLR output because it switches the trans-
former out of the circuit to prevent any loading. This 1/4” output should be used if the goal is to record as clean and tight a low end as
possible from tubes. This jack also should be considered if the destination or cables present a difficult load for the XLR transformer
output (high capacitance from long cables, or low resistance from 600 ohm vintage gear or more transformers).
7) COOL CHANNEL XLR JACK INPUT. ( Left) Accepts balanced or unbalanced sources. The pin out is as follows: PIN 2 = Posi-
tive = Hot, PIN 3 = Negative = Low or ground, PIN 1 = Chassis Ground. Be sure that the PIN 3 is connected to the negative or ground
and not “open” or a 6dB loss or loss of signal will happen. This input is transformer coupled. Switching PHANTOM POWER on, puts
approximately 48 volts via 6.8k resistors (double regulated 46-47 vdc typical) on pins 2&3.
8) COOL CHANNEL XLR JACK OUTPUT. (Channel One or Left) Transformer Balanced and Floating. The pin out is as above.
The 1/4” jack has no effect on this XLR (both can be used at once) but the OUTPUT MODE switch should be properly set (generally
+4 Balanced for maximum headroom) however it is worth mentioning that a transformer floating output is equally happy driving bal-
anced or unbalanced inputs. But we will remind you that most unbalanced inputs are designed for -10 levels so in order for TNT’s lev-
els and LEDs to work as designed, if the destination is -10 consumer level the switch should be set for “-10 unbalanced” (usually ;>)
9) COOL CHANNEL PHONE JACK OUTPUT. (Channel One or Left) Balanced or Unbalanced output so a 2way or 3way(stereo)
plug can be used. Factory set-up for +4dBu pro levels. This 1/4” output should be used if the goal is to record as clean and tight a low
end as possible (transformerless). This jack also should be considered if the destination or cables present a difficult load for the XLR
transformer output (high capacitance from long cables, or low resistance from 600 ohm vintage gear or more transformers). The OUT-
PUT MODE switch should be properly set (depending on the destination and wires) because these outputs do not use cross-coupled
op-amps and are designed to properly drive either balanced or unbalanced systems providing the switch is properly set.
10) OUTPUT MODE SWITCH. Sets both the output level and whether both the XLR and 1/4” jack are balanced or unbalanced.
Normally this switch should be in the “+4 BAL” or Center position. Some PRO gear may prefer the “+4 unbalanced” position but this
style of input is becoming increasingly rare, however because the TNT loses 6 dB of headroom in this mode, it can be used for crea-
tive “drive” cleverness. Similarly the “-10 UNBALANCED” mode loses another 6 dB of headroom when ‘mismatched’ in typical +4
balanced systems. However, this mode is more likely to find service because a fair amount of semi-pro and consumer gear with RCA
jack inputs are compatible with this level and 1/4” plug to RCA plug adapters are very common.
4
SERIALNUMBER
+4UNBALANCED
+4 BAL
-10UNBALANCED
OUTPUT MODE
MANLEY LABORATORIES, INC
13880 MAGNOLIA AVE., CHINO, CA 91710
PHONE (909) 627-4256 FAX(909) 628-2482
SERIAL NUMBER
FUSE 1A @ 117V
FUSE .5A @ 220V
www.manleylabs.com
+4UNBALANCED
CAUTION -RISK OF ELECTRIC SHOCK. DO
NOT OPEN. REFER SERVICING TO CAUTION: RISK OF ELECTRIC SHOCK. DO
QUALIFIEDPERSONNEL ONLY
TRANSFORMER & XLR
DESIGNEDBY HUTCH
TNT
DOES NOT BYPASS
TRANSFORMER
ISOLATED
CHANNEL 2
OUTPUT TRANSFORMERLESS
OUTPUT
OUTPUT
MIC MIC
N9512422
1
TRANSFORMERLESS
OUTPUT +4 UNBALANCED
OUTPUT
DESIGNED BY HUTCH
OUTPUT
TRANSFORMER & XLR
BYPASS
DOES NOT BYPASS
TRANSFORMER & XLR OUTPUT MODE
+4 UNBALANCED
+4 BAL
-10 UNBALANCED
MANLEY LABORATORIES INC .
TNT
www.manleylabs.com
N9512423
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