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Stereo tube line preamplifier with two double triode in class A configuration;
5 inputs, 2 main outputs, passive volume out, tape out, h.t.d.. output module
Sold with remote control. The Lector ZOE preamp is a superb linestage that features an innovative power supply based on a parallel/shunt voltage regulator circuit. No active devices are in series with the power supply path, just passive components such as premium quality resistors that provide the voltage drop needed, while an active device - wired in parallel - sinks current in order to keep a stable output voltage.
This new concept offers a virtual zero-ohm energy output to the tubes without relying on huge amount of negative feedback – in fact it’s a zero feedback design. The result is remarkable performance without the typical effect on overall sound quality imposed by series or pass regulators that are often plagued with a high impedance output and/or strong negative feedback.
Despite its simple, basic operation and clear advantage over series regulators, parallel/shunt voltage regulators are very uncommon in audio applications at any price level. Simplicity sometime is challenging and not that easy to achieve. A shunt regulator runs hot: it requires bigger transformers and huge heat sinks as if it were a small class-A amplifier – and in fact it is! So this additional heat has to be dealt with and the ZOE is fitted with a substantial heat sink to dissipate this excess heat.
The preamplifier gain stage is an all-tube, class-A design equipped with a pair of stock 6922 tubes. Thanks to Lector’s SATC (Self Adjusting Tube Circuitry, which is activated by an internal toggle switch), the new ZOE can also make use of a wide range of twin triodes – such as 12AT7/12AU7/6CG7/12BH7 – to suite end users’ taste. And swapping different tubes has never been easier. A large Plexiglas window on the top can be removed by simply undoing four screws, which allows you to change the tubes without removing the whole chassis lid. Another small window on front panel lets you see the internal circuitry, which is cleverly and discretely backlit during operation.
The ZOE comes with a remote-control handset and has five line inputs, mute/operation switch, auto-delay, remote controlled volume, two sets of main outputs, tape outputs and home theatre direct outputs that bypass the whole preamplifier circuitry when the unit is switched off. This feature is particularly useful in complex home theatre installations and allows you to send the selected source signals to an external multi-channel processor.
In the end, the ZOE’s shunt regulator effectively cancels any trace of power supply-added sound. What you hear is just the sound of your favourite tubes operating with exceptional linearity in a class-A gain stage. The purity of the ZOE is well augmented by its great dynamics, its big and dimensional soundstage, its accurate imaging, and its ability to resolve the subtle details.
VM-200 HYBRID POWER
AMPLIFIER
Stereo
hybrid (tube/mosfet) power amplifier
Lector proudly introduces the all new VM200 hybrid power
amplifier featuring an innovative direct coupled circuit
from tube to mosfet. No any coupled capacitors is on signal
path! This new concept offers a transparent and rich
dinamics sounds performance.
A
lot of new innovative technologies and solution has this
power amplifier rathed as 100 w per channel:
- only two stages from input to output (first stage by triode and second stage by pentode)
- dc coupled design from tube to mosfet without any capacitors!
- triode / pentode tube driving the mosfet in pure class A
- low feedback design set to only at 10% db
The power supply employ four stages and two toroidal power supply : shunt regulator for tube , hi-energy reservor capacitors for output mosfet, also the tube-filaments are supply on d.c. for lowest noise floor. The electronics and mechanical parts are selected as all premium grade components : polypropylene capacitors, toroidal hi-energy power transformer (2) , metal foil and tantalium resistors, 1.5 mm tickness steel chassis box, 8 mm tickness plexiglass front panel.
For better quality sound reproduction the output device don't use any type of protection as limiting the current so itís possible to drive low impedance loudspeakers with very good stability and energy power reservor .
Sonic performance delivers pure enjoyment: thanks to the direct signal drive mosfet regulator by tube circuits. What you listen is just the sound of your favourite tubes operating with exceptional linearity in a class A gain stage.
VFI-70L
series 3
Integrated Hybrid amplifier
This
integrated hybrid amplifier is the line version of our
model VFI 70 mm (mm phono input). The VFI 70L-3V has
four line level inputs and one tape output, speakers output
is for one system right/left for impedance from 2 to 16
ohms. The VFI 70 is one of the first hybrid amplifier
designed in 1982, this clever and really musical design
employ a tube triode in preamplification stages and a
hexfet's power transistor in output. The signal path come
only into one capacitor selected as MKP polipropilene
hi-quality for audio grade selection. This amplifier
perform a real impact sound feeling and hi-warm sound with
the benefit of tube triode input. Compare the VFI-70L
vs.other integrated amplifier no equal sound quality found
in the competitors...
- Optical bias control on cathode triode section (patend by Lector)
- Connectors input and output all gold plated
- Double power supply by two separate transformers (toroidal) for tube triode section and power section
- Class A for tube driver without feedback control ( only local feedback)
- Internal hand wire layout for sensible circuit as power supply,output stages ecc
- Capacitor on signal path made in polipropilene MKP
- Low feedback ammount on output stages
- Cherry wood veenering sides panel for increse rigidity structure ( optional)
- VFI 70L/M with remote control handset for volume ( optional)
- 50 Watt rms 8 ohm / 70 Watt rms 4 ohm
It is possible to order all options with remote control and cherry wood.
Phono step-up preamplifier for MC cartridge
The
MC AMP (vpp02 )
The MC-AMP is a step up units with tube amplifier that
operate on class A. This preamplifier make as adaptor
amplifier ( +22db) for MC cartridge so you can use your
moving coil directly to moving magnet input. The circuity
use only two tubes as ECC 88/6922 selecting at
very low noise operation . It's possible to change the
input resistance of MC cartridge by external RCA-
resistor plug for to have better interface between
cartridge and input tube.
We
supply four pair off plug-resistor set as per value
off: 30 ohm (Blu plug) 100 ohm (Black plug) 470 ohm (Green
plug) and 1000 ohm (Yellow plug). With this PLUG-RESISTOR
you can optimize the resistance value of your MC cartridge.
The exceptional signal to noise ratio togheter a hi-gain
operation allow to overtaking the limitation of transformer
step-up (distorsion and frequency response limits).
- Cherry wood veenerede for lateral side panels (optional)
- Separate power supply unit (series)
- Low noise selected tubes as 6922 ( 2 unit series)
- Hi-shielded metal frame chassis
- Two power supply toroidal transformer
- Cathode controlled circuit for reducing the noise ground (special circuit patended by Lector)
- Black ash plexiglass front panel as 8 mm thickness
Phono riaa preamplifier for MM
cartridge
The Phono-MMP
Genuine
all tube design
The
Phono M M P is a complete phono riaa all tubes
preamplifier that operate on class A without any local or
total feedback circuity. This preamplifier provide
the right amplification and equalization to standard riaa
at the phono moving magnet cartridge signal. The
circuity use three tubes, two ECC-81/12AT7 for moving
magnet input (as passive riaa equalization) and one
ECC-81/12AT7 for output as cathode follower adaptor, all
tubes are accurate selected at very low noise operation . A
innovative circuity designed from enginner of Lector
make the control of the bias by optical devices for
clear sound and phase control. A solid shielded cabinet as
hi-tickness off 1,5 mm reduce interference from emc field
for a better signal to noise ratio.
For
to built this riaa phono preamplifier we have design the
circuit with minimun capacitors on signal path (only 2 as
polypropilene grade) hi-reserved energy power supply with
capacitors filter located near to active device.
- Cherry wood veenerede for lateral side panels (optional)
- Low noise selected tubes as 12AT7 (3 unit as series)
- Hi-shielded metal frame chassis
- Hi-quality toroidal power supply transformer
- Cathode opto circuit for 12AT7 riaa moving magnet
- Black ash "piano finish" plexiglass front panel as 8 mm tickness
- passive riaa equalization by precision components
PHONO
AMP SYSTEM
This phono stage is a pure tube unit that offers both MM
and MC inputs. It operates only in pure class-A without any
local or total feedback circuitry, and provides the exact
right amplification and equalization to the RIAA standard
for both moving magnet and moving coil cartridges. The
circuitry uses five ECC-88/6922 tubes for moving coil
operation and two ECC-81/12AT7 for moving magnet (as
passive RIAA equalization), and one ECC-81/12AT7 for output
as a cathode follower adaptor. All tubes are carefully
selected for exceptionally low-noise operation. All
connectors are high-quality RCA fittings.
An
innovative bit of Lector-designed circuitry automatically
adjusts the control of the tubes’ bias by optical devices,
and another bit of special circuitry controls the cathode
operation for very low noise in the moving coil input. You
can change the input loading of MC cartridges by use of
external RCA plugs fitted with specific resistors for a
better interface between cartridge and input tube. 47 Kohms
is the default loading, and Lector supplies four other
pairs of plug-resistor sets: 30 ohms (Blue plug), 100 ohms
(Black plug), 470 ohms (Green plug), and 1000 ohms (Yellow
plug). Its exceptional signal to noise ratio, together with
its hi-gain operation, allows the Lector Phono Amp System
to overcome the limitations of transformer step-up
(possible distortion and frequency response limits, as well
as the inability to properly load MC cartridges) and
deliver pure tube-amplified music.
