Anthem PRE-1 Owners manual
D E S I G N E D A N D M A N U F A C T U R E D B Y S O N I C F R O N T I E R S I N C O R P O R A T E D
2 7 9 0 BR I G HTON R O A D , O A K V I L L E , O N T A R I O , C A N A D A L 6 H 5 T 4 T E L : ( 9 0 5 ) 8 2 9 - 3 8 3 8 F A X : ( 9 0 5 ) 8 2 9 - 3 0 3 3
S o n i c F r o n t i e r s c a n b e r e a c h e d 9 : 0 0 a m t o 6 : 0 0 p m ( E . S . T . ) o r 2 4 h o u r s a d a y b y f a c s i m i l e .
A N T H E M P R E 1 O P E R A T I N G M A N U A L
T E C H N I C A L S P E C I F I C A T I O N S
(AC line set at 117V 60Hz)
FREQUENCY RE SPONSE: Line input: ± 0.5dB 10Hz to
85kHz, -3dB below 5Hz and above 200kHz
Phono Input: ± 0.5dB of RIAA 20Hz to 20kHz
HARMONIC DISTORTION: (THD+N): Less than 0.1% at 2V
RMS (Line input to Main output), 10Hz to 60kHz; Less than
0.35% at 1V RMS at main output (Phono input to line output), 20Hz to 20kHz (typically less than 0.15% at midband,
phono input)
I N T E R M O D U L ATION DISTORTION (SMPTE): Line input to
Main output < 0.1% at 1V RMS, Phono input to Main output
G A I N : at 1kHz (Internally Selectable) Phono input to tape
output: 48dB, Phono input to main output: 61dB or 78dB
(switchable), High level input to main output: 29dB
INPUTS (5): CD, Tuner, Aux, Phono, Tape
OUTPUTS (3): Tape, Main 1, Main 2,
CONTROLS (3): Input Select, Balance, Volume
SWITCHES (3): Tape/EPL (External Processor Loop),
Mute/Operate, On/Off
INPUT IMPEDANCE: Phono: 47K, Phono Input
Capacitance: 100pF (provision on PCB for addition of additional phono loading components) High Level: 50K ohms
or higher depending on balance control setting.
OUTPUT IMPEDANCE: 390 ohms main outputs, Phono
520 ohms to tape outputs, Recommended load 50K-100K
ohms and 100pF (20K ohms minimum, 1000pF maximum)
R ATED OUTPUT: 1V RMS 10Hz to 85kHz main outputs
(Maximum 44V RMS output at 0.5% THD at 1kHz into 100K
ohm load with 1.7V RMS high level input)
CHANNEL SEPA R AT I O N : (Line Stage): < -75 dB Below 1V
@ 1kHz, < -65dB Below 1V @ 20kHz, (Phono Input to Line
Stage Output): < -55dB @ 1kHz, < -55dB Below 1V 10Hz to
20kHz
P H A S E : Phono to Tape outputs: Non-inverting, Line in to
Main output: Inverting
N O I S E : (Unweighted, shorted input): Line Stage: -95dB
below 1V Output 10Hz to 20kHz, Phono In to Line Stage
Output: -75 dB below 1V Output 20Hz to 20kHz
TUBE COMPLEMENT: Tube Audio Circuit: 4-Sovtek
6922/6DJ8, 2-12AT7/ECC81, Tube Rectifier In Power
Supply: 1-5AR4/GZ34
POWER REQUIR EMENTS: 100-130VAC 60Hz
(Export 200-240VAC 50/60Hz) 70 VA maximum
D I M E N S I O N S : Pre 1 Chassis: 19" (48 cm) W x 5 1/4" (13.4
cm) H x 11” (28 cm) D, Knobs extend 3/4" (1.9 cm) forward of panel. Detachable Interconnect cable extends 4"
behind rear of chassis. Detachable Power Supply: 7 1/8”
(18.4 cm) W x 5 1/8" (13.4 cm) H x 9” (22.9 cm) D
W E I G H T: Pre 1 Chassis: Net 17.5 Ibs, (7.9 kg); Power
Supply: Net 10 Ibs. (4.54 kg); Shipping 30 Ibs (13.6 kg)
We at Sonic Frontiers hope you will derive many years
of listening pleasure with your new Anthem Pre 1. This
Operating Manual contains important information regarding the operation and care of the Pre 1. Be sure to read
this manual carefully and follow these instructions in order
to keep it performing and sounding its best. Please contact Sonic Frontiers if you have any questions, a Customer
Service Representative will be pleased to assist you.
W H AT ’ S I N T H E B O X ?
In addition to the Pre 1, the Power Supply (their appropriate covers), and the operating manual you are presently
reading (with associated inserts and warranty card), there
are a few more items to take inventory of before steps are
taken to make the Anthem Pre 1 operational.
These items are:
• one matched pair of 12AT7 tubes, totaling 2
• two matched pairs of 6922 tubes, totaling 4*
• one 5AR4 rectifying tube
• a glove for handling the tubes
• a detachable AC power cord
• a handful of screws
• a screwdriver
After completing an inventory of these items, proceed
to the next steps.
*The 6922 tubes are carefully measured and matched in
pairs. Take extra care to keep the pairs from being mixed
and mismatched which would degrade performance.
A B C
D E F G H
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