Prospekt E- No.7 preamplifier.qxd

No.7
Quotation Stereo: Exceptional preamplifier with powerful,
colouring and outstanding sound. Laboratory- dream data!
Review Stereo 3/2006
Technical Data:
Frequency response:
5Hz- 200kHz/ 2,5V
Distortion THD+N:
≤ 0.0009 %/ 1V *
Max. Level- output:
10 V/ 10 kΩ/ 1kHz *
Signal/ Noise- ratio:
≥ 90 dB *
Impedance In/ Out:
100 kΩ/ 620Ω
Power- consumption stdby.:
≤ 0.5 W
Power consumption total:
39 W
Dimension W x H x D :
44 x 12 x 36 cm
Cross/Net- weight:
20,40 kgs/16,10 kgs
6 Inputs, 2 Outputs/ Mute- function/ Electronic tube safety circuit/ Electronic
program- switching/ Standby-Function/ metal IR remote control.
High professionel tube Lp. stage for, MM, MC with JFet- stage for cartridge sensitivities above 0,5mV. XLR- balanced output as standard.
* 8 tubes preamplifier with 3 times selected LUA 12 AX 7 LP/ 12 AT 7 EH
tubes. Selected and measured amplifiers with guaranteed data.
2 years warranty for first user,1 year for tubes, according to our warranty conditions.
All data typical. All alterations are reserved without any notice and information of customer in view of
improvement of specified data in this brochure.
®
HiFi Manufaktur
LUA No.7 All mesurements are made with tubes from Svetlana, Tesla, Sovtek, Golden Dragon,
General Electric, Sino, LUA, a.s.o..
1
+2
-6
+1.8
-7
0.5
-8
+1.6
-9
+1.4
-10
+1.2
0.2
-11
+1
-12
+0.8
-13
0.1
+0.6
-14
-15
+0.4
0.05
-16
-17
%
+0.2
d
B
r
+0
-18
0.02
-19
A
-0.2
-0.4
-20
-21
-0.6
0.01
-22
-0.8
-23
-1
0.005
-24
-1.2
-25
-1.4
-26
0.002
-27
-1.6
-28
-1.8
-29
10
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k
0.001
-2
20
Hz
50
100
200
500
1k
2k
5k
10k
20k
5k
10k
20k
Hz
Phono MM- Frequenzgang 20 Hz- 20kHz
typ. ≤ ± 0,35 dB (± 0,2 dB)
Distortion THD+N 3 V Output gain
5Hz -100 kHz/ typ. ≤ 0,007%/ 1kHz (0,005 %)
-10
+20
+10
1
-20
+0
-30
-10
500m
-20
-40
-30
-50
-40
200m
-50
-60
-60
W
100m
-70
-70
-80
-80
-90
50m
-100
-90
-110
-100
-120
20m
-130
-110
-140
10m
20
50
100
200
500
1k
2k
5k
10k
20k
-120
-150
20
Hz
50
100
200
500
1k
2k
Hz
Signal- Noise ratio typ.: -83 dB, K2 - 98,5 dB,
K3 - 109 dB Hum noise damping: 100 Hz/ 95 dB
Excellent values for a tube preamplifier
Cross Talk L- R // R- L
1 kHz/ typ. ≥ 85 dB (- 88,92 dB/ -95,62 dB )
No.7 is a pre-amplifier with 6 inputs. One switched input
selects the integrated phono- stage. Three outputs are available. Two RCA- cinch and one XLR balanced output is serial
standard. All control functions of No.7 operate through
microprocessor controlled gas contact relays with gold plated
contacts. This results no loss of musical details at this important point. The No.7 uses a finely matched ALPS potentiometer with a channel balance of less than 0.3 dB. The use
of 1% metal film resistors together with the finest WIMA
MKP 10 polypropylene capacitors with a minimal 1% tolerance in the phono- stage are standard for Lua's No.7.
Notwith- standing its affordable price, the No.7 represents a
genuine entry into Top High End vacuum tube electronics.
The integrated phono preamplifier is built to the same
demanding standards as the main No.7 amplifier.
Considered by many critics to be the finest, most tonally
neutral tube phono section currently available, its design
goal was to precisely track the prescribed RIAA equalization curves with absolute accuracy. The No.7 reaches this
goal with ≤ 0.2 dB. Its supremely quiet high gain circuitry
has been designed with tubes for the MM section and
JFET-’s for the MC- section, to deliver extra-ordinary performance for the broadest possible range of moving coil and
moving magnetic cartridges. The No.7 version represents a
big step ahead, with its frequency range from 5Hz- 200 kHz
and lowest distortion down to 0,0009 %, using double layer
polypropylene capacitors, selected together with a tolerance of
less ≤ 0.5 % as coupling capacitors. The finest custom
manufactured and selected Lua tubes provide the No.7 with
its characteristic sonic quality. Through meticulous engineering, careful specification of only finest available component
parts and a painstaking attention to construction quality, we
have created what we feel
is a preamplifier system
withoutrival in its
price class.
®
HiFi Manufaktur