Allnic H-7000V User guide

ALLNIC AUDIO

H-7000 / H-7000V PHONO STAGE PREAMPLIFIER

IMPORTANT NOTICE

CAUTION: Before rotating the front panel input selector knob, please ensure your H-

7000 / H-7000V is on MUTE. Without MUTE, the sound accompanying switching from
one input to another could be amplified to a level potentially damaging to some

loudspeakers.

OWNER’S MANUAL

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ALLNIC AUDIO
H-7000 / H-7000V PHONO-STAGE PREAMPLIFIER

Thank you for purchasing the Allnic Audio H-7000 / H-7000V Phono-stage
Preamplifier. We are certain your trust in Allnic Audio and its dealers worldwide,
as well as your appreciation for the sound of this high-quality device, will be
rewarded by its excellent operation for years to come.

Please read this entire manual before you connect the H-7000 / H-7000V Phono­stage Preamplifier to the other components of your system and the wall outlet.

*** Information and specifications for the Allnic Audio product described
in this manual are subject to change without notice.

*** For a list of Allnic Audio distributers around the world, please visit Allnic

Audio’s website:

http://allnicaudio.com

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TABLE OF CONTENTS:

___________________________________________________________________
INTRODUCING THE H-7000 / H-7000V PHONO STAGE 4

___________________________________________________________________
WHAT’S IN THE BOX? 6

___________________________________________________________________
SAFETY 6

___________________________________________________________________

CLEANING 7
Chassis
Connectors
_________________________________ __________________________________

INITIAL SET-UP 7
Location, Location, Location
Power Connection
Inputs
Outputs
Moving Coil (MC) Transformer Controls
Impedance Control
A Note On Phase
___________________________________________________________________

INITIAL POWER ON 10
___________________________________________________________________

OPERATION 10
___________________________________________________________________

TUBES 11
___________________________________________________________________

SPECIFICATIONS 11
___________________________________________________________________

WARRANTY 12

___________________________________________________________________

TABLES AND FIGURES 13

Please read about SAFETY before you attempt to use the H-7000 / H-7000V - we care
about our customers and the equipment, and we want you to enjoy this product for a
long time!

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INTRODUCING THE H-7000 / H-7000V PHONO-STAGE PREAMPLIFIER

The two versions of the H-7000 are Allnic Audio’s second from the top of the line phono-stage preamplifier model.
Each version comes in two colors, silver or black, depending on your order specification. Like all Allnic Audio
products, it uses Permalloy (iron and nickel alloy) for its transformer cores. Allnic is grateful to Mr. G.W. Elmen of
Western Electric for inventing Permalloy for transformer core use, and in so doing, providing an enormous service
to recorded music listeners everywhere.

The H-7000 / H-7000V have the following features:

• LCR TYPE RIAA EQUALIZATION:

RIAA equalization is a specification for the correct playback of vinyl records, established by the Recording
Industry Association of America. The purpose of the equalization is to permit longer playback times and
improve sound quality.

RIAA equalization is a form of establishing a flat frequency response for the playback of recorded music. The
necessity for this equalization process arises from mechanical difficulties inherent in record production. In
order to prevent the cutting needle from over-cutting into the next record groove in the bass, as a record is
cut, some bass frequencies are attenuated. In the treble region, in order for high frequency sounds not to be
masked by the noise inherent in moving a stylus over and through a modulated vinyl surface, some treble
frequencies are boosted. With the application of the correct filtering techniques on playback, the result is a
flat frequency response with better signal to noise ratios.

The H-7000V is equipped with Allnic’s “Multi-Curve” LCR units (one for each channel) which have four (4)
Turn-overs (frequency options) and four (4) Roll-offs (gain reductions in dB). These new units provide for the
reproduction of various recording curves (both for bass attenuation and treble boost) used by different
companies prior to the establishment of the RIAA standard. There are 4 Turn-over options, at: 250Hz, 400Hz,
500Hz RIAA and 700Hz. There are 4 Roll-off options (at 10KHz): -5dB, -11dB, -13.7dB RIAA and 16dB (See
Figure 8).

There are four de-emphasis methods that can be applied at playback:

A. Active filters (Negative feedback types):

Different quantities of negative feedback are applied, with deeper feedback to the high frequencies and
shallower to the low frequencies. The benefits of this method are improved signal to noise ratios, low cost
and consistent operation. Some of the shortfalls are looser bass reproduction and possibly a pinched and
compressed high frequency playback due to excess feedback ratios.

B. Passive filters (CR type):

The frequencies are filtered to fit the RIAA specification by varying the amount of attenuation at different
frequencies through a complex capacitor-resistor network. This technique results in no voltage overload, purer
reproduction (because there is no feedback), and more accurate RIAA compensation. However, there are
problems because the system provides no gain, and insertion loss and impedance matching issues arise.

C. Hybrid filters (use of both CR and negative feedback types):

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In this method, both types of filters applied separately; an active filter is applied to the low frequencies and

a passive filter to the high frequencies. Unfortunately, both the advantages and disadvantages of each of these
two types of filters, already discussed, affect the playback system at the same time.

D. LCR filters, which are used in the H-7000 / H-7000V:

Two pieces of a linear reactor (a kind of choke coil) comprise the main part of these filters, assisted by
precise CR filters, in order to lower impedances and insertion loss.

In vacuum tube circuits, active and passive filters usually are operated on one hundred plus kilo ohms of
impedance. An LCR RIAA filter's impedance is a constant 600 ohms.

Furthermore, an LCR RIAA filter's series resistance is less than 13 ohms (as a comparative, some famous
ones are 31 ohms). The lower the impedance, the more dynamic is the sound reproduction, with better
bass response and speed.

But LCR RIAA units have drawbacks as well. These drawbacks are high cost and the difficulty of impedance
matching; the latter has been the primary hindrance to the commercialization of this superb method in
the construction of phono stage amplifiers. However, Allnic Audio manufactures a high quality LCR RIAA
unit and has developed a 600 ohms impedance matching method.

• The H-7000 / H-7000V phono-stage is all transformer coupled. One may order an H-7000 / H7000V

with an internal electronic, that is, “active” head-amplifier (pre-preamplifier) for one of the two
MC input pairs.

• No negative feedback design with only two gain stages

• For superior signal to noise ratios, the H-7000 / H-7000V is equipped with pure vacuum tube, high

speed, automatic voltage regulation for each channel and a power supply unit separate from the
phono stage itself.

• High quality MC Step-up Transformers with Permalloy cores are used for the H-7000 / H-7000V’s

MC inputs.

• Pure Class A operation

• Pure balanced operation

• As are all Allnic Audio products, the H-7000 / H-7000V is fully RoHS (EU Reduction of Hazardous

Substances regulation) compliant in construction and materials

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WHAT’S IN THE BOX?

Please check that the shipping box contains the following:

• One (1) Allnic H-7000 or H-7000V phono stage – in silver or black, depending on your order

specification

• One (1) Power Supply – in silver or black, depending on your order specification

• One (1) 5U4G or equivalent tube

• One (1) power umbilical cord

• One (1) IEC type power cord

• One (1) Owner’s Manual

• For the version of the H-7000 / H-7000V with the electronic (active) head-amp ONLY, a vinyl

pouch with five (5) pairs of resistors (see the section below on impedance matching for the
values)

Note:

1) The H-7000 / H-7000V ships with the tubes installed. Before!!! connecting the H-7000 / H-7000V to its

power supply, remove ALL protective cushioning material inside the tube chimneys. The tube chimneys
should contain NOTHING except the tubes.

2) The H-7000 / H-7000V power supply will work with most IEC type aftermarket power cords. The Allnic

ZL-3000 and ZL-5000 power cables will make an excellent match. Of course, only you can determine the
power cord that works most synergistically with the H-7000 / H-7000V in your system.

3) The power supply ships with the 5U4G or equivalent tube packed separately. BEFORE!!! connecting the

power supply to the wall outlet, remove the power supply cover and install the 5U4G or supplied
equivalent in its tube socket.

Be sure the H-7000 / H-7000V power supply unit is labeled for the AC voltage of your location. If it is not, please
contact Allnic Audio or its authorized representative.

We advise that you keep the boxes and other packing materials that your H-7000 / H-7000V came in. It will be
useful if you sell your H-7000 / H-7000V, or in the unlikely event you need to ship it or the power supply for
service.

SAFETY

• BEFORE!!! connecting the power supply to the wall outlet, remove the power supply cover and install

the 5U4G or supplied equivalent in its tube socket.

• BEFORE!!! connecting the H-7000 / H-7000V to the power supply, remove ALL protective cushioning

material inside the tube chimneys before operation. The tube chimneys should contain NOTHING
except the tubes.

• Always ensure your H-7000 / H-7000V is on MUTE before rotating the front panel input selector knob.

Without MUTE, the sound accompanying switching from one input to another could be amplified to a
level potentially damaging to some loudspeakers.

• Disconnect the power cord by pulling the plug, not the cable.

• Do not attempt any repairs.

• Do not remove the units’ chassis covers except as directed by this manual or with specific authorization

from Allnic Audio or its authorized representative.

• Keep the power cords away from heat sources.

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• Keep the units away from liquids – do not allow any liquid to enter the interior of the units.

• When the units are moved from a cold to a warm environment, allow sufficient time for any

condensation to evaporate in both units before plugging the power supply unit into an AC connection.

• Do not attempt any repairs.

• See the notes on “Location, Location, Location”.

CLEANING

A. Chassis

Use only a soft, lint-free cloth dampened slightly with water only (NO cleaning fluids!) to clean the faceplate and chassis
of the H-7000 / H-7000V and its power supply.

B. Connectors

You may use any good quality contact cleaner recommended for such applications to clean the contacts from
time to time, as you deem appropriate.

INITIAL SET-UP

A. LOCATION, LOCATION, LOCATION

Like all audio products using tubes, the Allnic Audio H-7000 / H-7000V and its power supply need to be placed
on a solid stand in a location that provides good air circulation around both the phono stage and the power supply.

• DO NOT cover the top of the H-7000 / H-7000V phono stage or the ventilation slots in the top of the

power supply chassis.

• DO NOT place the units on carpet or foam.

• DO NOT subject the units to knocks and shocks as you move them around. This advice is meant

particularly for those who may want to place the H-7000 / H-7000V or its power supply on some kind of
after-market isolation feet or similar devices. Dropping one side of either of the H-7000 / H-7000V units,
or the whole of either unit, is not a good thing to do.

• DO NOT place the units near a strong light or heat.

• DO NOT place anything heavy on the units.

• DO NOT allow rubber or vinyl materials to rest on either units’ chassis for long periods of time. This could

discolour the metal.

• DO place the units on a shelf or stand that is stable and not subject to vibration or sudden shock.

• DO consider using a high quality power cord and inter-connects, for both inputs and outputs. The H-7000

/ H-7000V is a highly sensitive piece of electronic designed for neutrality and will output what you put
into it. Allnic’s Zero Loss Technology cables will work synergistically with the H-7000 / H-7000V.

• DO try to place the H-7000 / H-7000V and its power supply away from major sources of RFI and EMI;

though well shielded, the H-7000 / H-7000V units will function best away from large power transformers
and other sources of such interference.

B. POWER CONNECTIONS

The H-7000 / H-7000V power supply uses a standard three prong male IEC connection for AC input. You need to
use a power cord with a female three prong IEC connector at one end.

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The H-7000 / H-7000V power supply connects to the phono stage itself using the supplied umbilical cable.
Connect the units to each other using the umbilical cable with the appropriate screw-on connections to the
receptacle labeled “DC Source Input” on the rear of the phono stage and the connection terminal labeled “DC
Source Output” on the left side of the rear of the power supply (Please refer to Figures 1 and 2).

The H-7000 / H-7000V power supply you have purchased is set internally for AC 110 or 120 volt – 60 HZ operation.
There is no way to change this to another AC setting without return of the unit to the factory for rewiring, at the
owner’s cost, including transport both directions.

C. INPUTS

For all versions of the H-7000 / H-7000V, there are two (2) sets of two (2) pairs of single-ended (RCA) inputs. These two
pairs are located in the middle of the rear of the phono stage (See Figure 4) and labeled “input” in the middle above
them. Each channel pair of inputs is aligned vertically, with the left channel input at the top and the right channel input
on the bottom. The two left hand pairs of inputs (facing the back of the phono stage) have an “MC1” and “MC2” label
above the two left channel connectors; these are the two input pairs for a moving coil cartridge. The right hand pairs
of inputs have an “MM” label above the left channel connectors, “MM1” and “MM2”; these are the two input pairs for
a moving magnet cartridge. Each pair of moving coil and moving magnet connections has a number label between the
left and right channel input connections.

In each case, for both MC and MM connections, the left hand vertically aligned pair of connections (again, facing the back
of the unit) corresponds to input 1 for the button switch on the front panel of the phono stage, while the right hand
vertically aligned pair is input 2.

Between the two sets of MC and MM input connections is a screw type connector. This connector is the ground
connection for a ground wire from a cartridge and/or turntable.

When you are facing the front of the H-7000 / H-7000V, the two pairs of MC connections are on the right/centre of the
unit, with the two MM connections immediately to their left on the other side of the ground connection.

The H-7000 / H-7000V has been designed and manufactured to work most synergistically with Allnic Audio
preamplifiers, pre-phono stages (head-amps), equalization products and ZL Technology cables.

D. OUTPUTS

The H-7000 / H-7000V is equipped with one pair of unbalanced or “single-ended” (RCA) outputs and one pair of true
balanced (XLR) output connections. The left channel output connections are labeled “left output” and are just to the
left of the DC Source Input. The right channel output connections are labeled “right output” and are on the far left hand
side of the rear of the phono stage unit (See Figure 4). In each pair, the balanced (XLR) connection is labeled “1”, and
the unbalanced (RCA) connection is labeled “2”.

Above each pair of outputs, comprised of one single-ended (RCA) connection and one balanced (XLR) connection, is a
switch for selecting either the balanced or the single-ended connector. The switches are labeled “unbalanced output”.
Moving the unbalanced output switches to the right (facing the rear of the unity) sets the outputs to their respective
unbalanced (RCA) connector. Of course, the opposite position in each case sets the switches for the balanced
connectors. Be sure to have both switches set for the connection you are using. You may have both balanced and
unbalanced outputs connected at the same time without introducing hum PROVIDED you have the output switches
set to unbalanced output.

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E. MOVING COIL (MC) STEP-UP TRANSFORMER CONTROLS

On the top of each channel’s MC step-up transformer on the centre rear of the chassis deck of the phono stage unit,
there is a rotating control. Turn the control knobs to select from four (+22, +26, +28, +32dB) gain factors. The four
control positions are labeled as both gain and the turn ratio of the MC transformer; for example, the lowest gain
position of +22dB automatically corresponds to a turn ratio of x13 (see Figure 7). You should always use identical
settings for both transformers to avoid channel imbalance.

NOTE:

Please mute your H-7000 / H-7000V, and/or reduce your preamplifier’s volume control during transformer gain
adjustments. Be aware if you are increasing gain, that you may hit an uncomfortably loud volume level.

F. IMPEDANCE / PHONO EQUALIZATION CONTROL

The Impedance control is located at the rear of the top plate of the H-7000 / H-7000V chassis (see Figure 5,6). It has

four positions, 10, 20, 30 and 47 KΩ (thousand ohms). Use the impedance control to match the H-7000 / H-7000V to
the impedance of your cartridges. For MM cartridges always set the control at 47 KΩ. Vary the impedance settings to
match your MC cartridges. By experimenting with the impedance settings and the transformer controls together, you
can obtain optimum performance from your MC cartridges.

You will need to experiment to find the “sweet spot” combination for each MC cartridge because even the cables from

your cartridge to the tonearm, your internal tonearm cable, and your phono cable will all affect impedance level. We
suggest starting with the specifications from your cartridge and using the impedance level closest to that. Please refer
to Table one to see the possible combinations for MC cartridges and the resulting operating impedances and gain.

In the Specifications section, you will read that the MC input impedance for the H-7000 / H-7000V is up to 444 ohms.

This value represents the internal impedance of the cartridge itself and is at the very extreme of what would normally
be expected for the internal impedance of an MC cartridge.

The H-7000V’s phono equalization curve controls, of which there are two pairs, one for each channel, are on top of the

transformers located just in front of the Moving Coil transformer controls. Use the rotary knobs to set the equalization for
each record. The RIAA standard, which is used for most records, is a Turn-over of 500 Hz and Roll-off of -13.7 dB; this
standard is indicated for each control knob (See Figure 7). Be sure to set the controls identically for both channels. A
selection of some of the more common possible non-RIAA settings are found in Table 2 of this Manual.

G. A NOTE ON PHASE

Phase issues generally will result in lack of bass and/or focus of the stereo image. You may need to reverse
connections on your cartridge if you are having phase issues. As is usual in these circumstances, some trial and
error experimentation may be required to find the correct position. The process is simplified for you with the H­7000, as it has a phase control switch on the front panel of the phono stage unit.

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INITIAL POWER-ON

Once you have your H-7000 / H-7000V in place, installed the 5U4G tube or supplied equivalent in the power supply,
replaced the power supply cover, connected the power umbilical cable between the powers supply and the
preamplifier, and made all connections to your turntable and preamplifier or integrated amplifier, you are ready to
turn on the power for your H-7000 / H-7000V.

Before you power up the H-7000 / H-7000V, though, also be sure you have:

• removed ALL the cushion materials/”O” rings from the tubes

• selected the output connections that you want to use, single ended (RCA) or balanced (XLR), on the two

switches on the back of the phono stage

• turned the volume down or muted your preamplifier

• pressed the button switch on the left hand side of the front panel of the phono stage, labeled “muting”

below and having button in and out icons for operate and mute, respectively, to the in/down “mute” position
(See Figure 3)

• pressed the button switch on the right hand side of the front panel of the phono stage to the appropriate

phase position, either “normal” (pressed in) or “inverted” (out position). We suggest starting with “normal”.
position (See Figure 3)

• rotated the knob labeled “input selector” to the appropriate input, corresponding to the input you will use

initially (See Figure 3), either MC1 or MC2, or MM1 or MM2

• if you are using a moving coil cartridge, set the MC transformer controls on the top of the chassis to the

factor that you will try initially

• set the Phono Equalization controls for both channels for the setting for the first record you will use

• checked that all your connections are snug

To turn on the H-7000 / H-7000V, press in the button switch on the front of the power supply marked with on and off
icons (see Figure 2). Of course, the off position is the reverse, pressing the button again so it is returned to the maximum
raised position.

OPERATION

When the power supply is on, the light on its front panel will illuminate and, if it is in the “operate” position, the light
above the muting switch on the front panel of the Allnic Audio H-7000/ H-7000V phono stage will illuminate after a
forty (40) second automatic protective “mute” period. The light above the phase switch will illuminate as well, if the
switch is in the “normal” position at turn on.

To avoid potentially damaging surges to the speakers, switch between MM or MC input, or between inputs 1 and 2
of either, only with the H-7000 / H-7000V in “MUTE” mode and with your line-stage preamplifier or integrated
amplifier volume down or in MUTE.

From this point on, operation is straight-forward. All functions except for MC transformers’ gain selection are controlled
from the front panel. Of course, BE CAREFUL about differences in gain between your sources. Generally, disc players and
tuners will have greater gain than phono stages. That means the volume setting for listening to your turntable might be
too high for listening to CDs.

When you are finished listening, turn off your power amplifier(s); then turn off your preamplifier and then turn off the
H-7000 / H-7000V last by pressing the on-off switch on the front panel of the power supply so it returns to the out
position.

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In the case of any failure, please contact Allnic Audio or its authorized representative for assistance.

THE CURRENT METERS

These illuminated meters indicate the current supply to the gain tubes in the H-7000 / H-7000V. They are indicators of
failure or damage to the function of the unit. There is one meter for each channel. The needle should be between the
two parallel lines just left of centre on the meter face. Any failure of the tubes or circuits in one or the other of the H­7000 / H-7000V’s channels is indicated by the needle on the meter for the respective channel moving out from
between these two parallel lines.

• If the needle has moved to the left of the parallel lines on a meter, it means that one or both the E810F tubes

for that channel is failing.

• If the needle on either meter moves to the right of the parallel lines, it means that one or the other of the

voltage regulator tubes (7233 or 6485) for that channel is failing.

In the case of any failure indicated by a meter, please contact Allnic Audio or its authorized representative for
assistance.

TUBES

The H-7000 / H-7000V uses the following tubes (Please see Figures 5,6):

• Four (4) x E810F

• Two (2) x 7233

• Two (2) x 5654

• One (1) x 5U4G, 5U4GB (in, and the only tube in, the power supply)

All consequences of changing or attempting to change tubes are borne by the user unless by express agreement between
the owner and Allnic Audio or its authorized representative. Allnic Audio and its authorized representatives are not liable
in any way whatsoever for any injury or loss incurred by the user or for damage to the H-7000 / H7000V, any of its parts, or
tubes or replacement tubes resulting from the user changing or attempting to change tubes.

SPECIFICATIONS FOR THE ALLNIC AUDIO H-7000 / H-7000V PHONO STAGE

Inputs:

Moving Coil (MC) × two (2) pairs unbalanced (RCA)
Moving Magnet (MM) x two (2) pairs unbalanced (RCA)

Outputs:

One (1) pair x unbalanced (RCA)
One (1) pair x balanced (XLR)

Ground:

One (1) x screw type terminal

Frequency (RIAA):

20Hz ~ 20KHz (±0.5db)
30Hz ~ 15kHz (±0.3dB)

Voltage Gains:

MM +40db (1KHz)

MC +62, +66, +68, +72db (1Khz)

Input Impedance:

MC up to 444Ω (See “Impedance Control” in the Initial Set-Up section)
MM 47 KΩ

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Maximum Input Voltage (MM,
non-clipping):

20Hz / 10mV
100Hz / 50mV

1KHz / 220mV
10KHz / 690mV

THD (Total Harmonic Distortion):

Less than 0.3% (1KHz, Output 1V)
Output Impedance:

200Ω (Constant)

S/N Ratio:

-85db (CCIR, 1KHz)

Tubes:

E810F (or 7788: there are no other equivalents to these tubes) × 4 (gain stages,
left and right channels)
7233 (no equivalent) × 2 (Voltage Regulators)

5654 (equivalent to 6AK6, A4361, CV1762) × 2 (Voltage Regulators)
5U4G,5U4GB(in, and the only tube in the power supply) x 1 (Rectifier)

Fuse:

AC 2A, 250V

Dimensions:

- Phono Stage:

- Power supply:

430mm (16.9 inches) x 350mm (13.8 inches) x 173mm (6.82 inches) (W x D x H)

170mm (6.7 inches) x 275mm (10.8 inches) x 118mm (4.65 inches) (W x D x H)

Weight:
Phono Stage:
Power supply: Both
units in original
packing:

15.7 Kg (34.62 lbs) unpacked

8.1 Kg (18 lbs) unpacked

30 Kg (66 lbs)

WARRANTY

FOR WARRANTY SERVICE, PLEASE CONTACT YOUR AUTHORIZED ALLNIC DEALER.

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 Allnic Audio or its authorized
representative. For the warranty to be valid, a defective product must be returned to Allnic Audio’s authorized
representative for service prior to any unauthorized attempt to repair. Any repair work on an Allnic Audio product not
specifically authorized by Allnic Audio or its authorized representative will void the warranty on the product.

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FIGURES

FIGURE 1: Power Supply – Rear View

FIGURE 2: Power Supply – Front View

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FIGURE 3: H-7000 / H-7000V

Front View

FIGURE 4: H-7000 / H-7000V Rear

View

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FIGURE 5: H-7000

Top View

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FIGURE 6: H-7000V

Top View

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FIGURE 7: H-7000 / H-7000V

Step-up Transformer Gain Controls

FIGURE 8: H-7000V

EQ Controls

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TABLES

Table 1:

Impedance Combination Table

T / R

1.

1 / 13 1 / 20 1 / 26 1 / 40

S R

2.

+22dB +26dB +28dB +32dB

20 K ohms 118 ohms 50 ohms 30 ohms 12 ohms

30 K ohms 177 ohms 75 ohms 45 ohms 19 ohms

47 K ohms 278 ohms 117 ohms 70 ohms 29 ohms

75 K ohms 444 ohms 188 ohms 111 ohms 47 ohms

1. Turn Ratio of Step-up Transformer

2. Secondary Load Resistor

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Table 2:

H-7000V

Some Common Equalization Settings

RECORD LABEL

TURN-OVER

ROLL-OFF

HMV, EMI-ANGEL,
WESTMINSTER, EPIC, & COLUMBIA

500Hz

(Early versions 250Hz)

-16dB (Sometimes -13.7dB)
(Early versions 0dB)

DECCA

L'OISEAU-LYRE

500Hz

*Early ffrr 700Hz

-11dB

-11dB

ARGO, RCA (New Orthophonic), &
BRUNSWICK
(RIAA)

500Hz

-13.7dB

RCA (1949-51)

RCA (1951-52)

700Hz

500Hz

-13.7dB

-13.7dB

TELEFUNKEN & (German) DECCA

400Hz

-5dB

PHILIPS

400Hz

-5dB

MERCURY

400Hz

-11dB

MELODIYA, DG & ETERNA

500Hz

(Sometimes 250Hz)

-13.7dB

(Sometimes -11dB or -16dB)

NARTB

500Hz

-16dB

CAPITOL (1942)

400Hz

-11dB