Millennia HV-3D User manual

1
HV-3D
READ THIS FIRST!
Any changes or modifications not expressly approved by MILLENNIA MEDIA, INC. could
void your authority to operate this equipment under the EC or FCC rules.
1. Copyright: You acknowledge that no title to the intellectual property in the HV-3D is trans-
ferred to you.
2.Inspection:Inspectpackingbox(es),HV-3D,andcable(s)fordamage,unusualmarks,orshort-
ages.Itisyourresponsibilitytoreportdamage,shortage,ormisshipmentsinatimelymanner.
MillenniaMedia and/or its dealers willnot be responsible for claimsarising from damage in
shipping,norwillclaimsforshortageormisshipmentsbehonored,morethan10daysaftership
date.
3. Read this manual carefully and completely before attempting to use the HV-3D. Improper
operation could result in damage to product. It is the user's responsibility to understand the
safe use and operation of this device.
4. The shipping box of the HV-3D system will include (1) Owner's Manual, (2) HV-3D, (3) a
UL approved power cord, (4) Owner's Registration Card. Fill out the Owner's Registration
Card and return to Millennia Media at your earliest ability.
The material contained in this manual consists of information that is property of Millennia
Media, Inc. and is intended solely for use by the purchasers of the equipment described in this
manual. Millennia Media, Inc. expressly prohibits the duplication of any portion of this manual
or the use thereof for any purpose other than the operation and/or maintenance of the equip-
ment described in this manual without the express written permission of Millennia Media,
Inc.. Under copyright laws, this manual may not be duplicated in whole or in part without the
written consent of Millennia Media, Inc..
HV-3D is a trademark of Millennia Media, Inc. All other trademarks are property of their
respective holders. Serial numbers are located on the rear left side of each unit. We suggest
that you record the serial numbers in the space provided below. Refer to it whenever you call
an authorized Millennia Media repair facility or the manufacturer. Make sure that you return
your completed warranty card immediately.
Features and specifications subject to change without notice.
© 2000- Millennia Media, Inc., All rights reserved
Serial Nos. ______________________________________________________________
Purchase Date ___________________________________________________________
Where Purchased _________________________________________________________

2
HV-3D
SAFETY PRECAUTIONS
For your safety and the safety of others, be sure to read and understand all safety and opera-
tional instructions before attempting to use the HV-3D. WARNING: The HV-3D internal
circuitry carries lethal voltages. Carefully observe all warnings, precautions, and instructions
on the HV-3D and as described in the instructions supplied with the unit.
1. WATER, MOISTURE, AND SPILLAGE
Do not attempt to use the HV-3D in, near, or around water or in unusually moist environments,
such as near a sink or swimming pool. Prevent liquids or any other materials or objects from
spilling or falling into the HV-3D unit.
2. HEAT AND VENTILATION
Be sure to allow adequate ventilation to HV-3D and avoid using or installing unit in close proxim-
ity to heat sources, such as heaters, stoves, radiators, power amplifiers, spotlights, or other heat-
producing appliances or equipment.
3. POWER SOURCES AND POWER CORD PROTECTION
The HV-3D Power Supply should be connected to a power source only of the type described in
the operating instructions or as marked on the Power Supply. Route the power cord so that it is
not likely to be walked on or pinched by having objects placed on it. Pay particular attention to
plugs, receptacles, and the point where the AC power cord exits the HV-3D.
4. GROUNDING
For your safety, it is extremely important that the grounding pin of the 3-wire power cable (in-
cluded with unit) be inserted into a grounding type 3-pin power outlet. If you are unable to insert
the plug into an existing outlet, contact an electrician to install a properly grounded 3-pin power
outlet,preferablythatwithOFIprotection,ifavailable.
5. DAMAGE REQUIRING SERVICE
Thisunitshouldberepaired or serviced by qualified personnel whenever:
· The AC power cord has been damaged, or
· A 130 Volt DC microphone cable has been damaged, or
· Objects have fallen or liquid has spilled into any HV-3D unit, or
·Theunitdoesnotfunctionproperlyorexhibitsamarkedchangeinperformance,or
· The unit has been abused, dropped, or damaged, or
· The unit has been exposed to rain or moisture
6. SERVICING
Lethal voltages are found inside the HV-3D chassis. The user should not attempt to repair or
service this unit. All servicing and/or repairs should be referred to Millennia Media.
If, after reading all instructions, precautions, and warnings, you have remaining questions, please
contact Millennia Media directly before attempting to use your HV-3D. Retain this owner’s
manual as a record of your purchase to aid positive identification in the event of loss.

3
HV-3D
QUICK START!
READTHIS!! TheHV-3Doperateswithlethaloperatingvoltages—
thevoltageinsidetheHV-3Dcankillyou.Never,underanycircumstances,
removethetopcover.Refertoaqualifiedelectronicstechniciananyandall
servicingandotheroperationswhichrequirethetopcovertoberemoved.
Congratulationson your purchase of the MillenniaMedia HV-3D High Voltage Microphone
Preamplifier.TheHV-3Disthe result of meticulous listening tests on numerous circuit, topology,
andpackaging designs. Your HV-3D is a finely tuned instrument intended for critical professional
applications—we feel it offers the world's mostsonicallyneutralmicrophonepreamplification.
Withthe emergence of 24+ bit digital audio, recordingengineers are faced with a new require-
mentforundistorted dynamic range. The HV-3D meetsthischallengeexceptionallywell.
Before connecting power to the HV-3D, assure that the rear panel voltage selection fuse block
switch is set correctly. In the USA, the HV-3D is shipped with the voltage selection block set to
100-120 VAC. If you change the voltage selection block to 200-240 VAC usage, be sure to
changebothfusestothecorrecttypes.See "Rear Panel" instructions for proper fuse requirements.
The HV-3D enclosure measures 19" wide x 3.5" high x 12.5" deep and is designed for mount-
ing into a standard 2U, 19" equipment rack. If the HV-3D is mounted in a road case or other
rack which is prone to strong vibration or shock, it is recommended that the rear of the HV-
3D be supported or otherwise reinforced to withstand such conditions. The HV-3D runs cool
but should be mounted with at least one rack space open above and below the unit.
The HV-3Disdesignedonacommongroundtopology.Forhighqualityoperation,andforyour
ownsafetyand the safety of others, do not defeat thepurpose of the earth grounding pin on the
A/C power cord.
HV-3DFRONT-ENDPROTECTION
Back-to-backZenerdiodes protect the super-matched bipolar inputtransistorsagainsthightran-
sientenergyspikes common when insertingandextractingXLR connectors. However, tomaintain
topperformanceandprotect the HV-3D's sensitive front-end, itisadvised that you do not insert or
extractXLRconnectorswithpreampACpoweron. Get in the habit of turning preamp power off
wheninsertingorremovingmicrophone input or line output cables.
MillenniaMediahaslong enjoyed a reputation for what many engineers call the world's most
musicallyaccurateanddynamically stable microphone preamplifier. With B&K(DPA)highvoltage
micinput option,afullybalanced audiopath,enormous non-padded inputandoutputheadroom,
superiortechnicalspecifications, world-class internal componentry, optionalA/Dconversion, and
unparalleled sonic performance, the HV-3seriesof microphone preamps is already becoming a
trueclassicin the professional audio industry—andwillremain contemporary well intothenext
century.Hence,MillenniaMedia.

4
HV-3D
HV-3D REAR PANEL
(1) CONVENTIONAL MIC INPUTS "48V IN (1 - 8)"
Conventional3-pinfemaleXLRinputjacksforusewithallconventionalbalancedmicrophones,bothphantom
andnon-phantompowered.Provides+48VPhantompowering.Standardinputimpedanceisapproximately
6,200ohms.Pin1isground.Pin2ispositivepolarity.Pin3isnegativepolarity.ConnectorcontactsareNeutrik
Galvatronicgoldplated.ItissuggestedthatXLRcableconnectorsusedwiththeHV-3Demployidenticalplating.
(2) HIGH VOLTAGE MIC INPUTS "130V IN (1 - 8)"
Four pin female XLR connector for use only with B&K (DPA) models 4003, 4004, 4009, and 4012 micro-
phones. On HV-3D units without this option, a metal plate will cover the unused XLR holes. Pin 1 is
ground.Pin2isnotconnected.Pin3is+130VoltsDC power,andpin4isunbalancedaudiosignal.Connecting
anythingotherthantheabovelistedB&K(DPA)modelstothisconnectormayresultinseriousdamageto
microphone,theHV-3Dunit,orboth.ConnectorcontactsareNeutrikGalvatronic goldplated.Itissuggested
thatXLR cableconnectorsusedwiththeHV-3Demployidenticalplating.
(3) LINE LEVEL OUTPUTS "OUT (1 - 8)"
Conventional three pin male XLR connectors providing balanced, line level microphone output. Pin 1 is
ground.Pin2ispositivepolarity.Pin3isnegativepolarity.Theline leveloutputiscapableof driving600ohm
loadsandlong,highcapacitancecables.Outputsmaybeconfiguredin anunbalancedconfigurationbyeither
groundingoneoftheaudio polarities(pin2orpin3),ortakingoneaudiopolaritydirectlyasanunbalanced
signal.Intheformerconfiguration,theoutputisautomaticallyincreasedby6dB.ConnectorcontactsareNeutrik
Galvatronicgoldplated.ItissuggestedthatXLRcableconnectorsusedwiththeHV-3Demployidenticalplating.
(4) EARTH/AUDIO GROUND JUMPER
A barrier terminal which ties earth ground to audio ground. If ground "hum" loops are experienced when
usingtheHV-3D,removing thisjumpermayhelp. Usingthisjumpertoliftground,theintegrityofthechassis/
earthgroundconnectionisnevercompromised.Donot defeatthe earthgroundingpin ontheACplug.
(5) AC VOLTAGE MAINS SELECTION "100-120" or "200-240"
A power entry module with a removable fuse holder block. This fuse holder block is selectable for 100 to
120 Volt or 200 to 240 Volt worldwide mains powering. The fuse block contains two fuses — one fuse is
in series with the hot power line while the other fuse is in series with the neutral power line. Both fuses
must be installed. To change the mains voltage selection, remove IEC power connector and assure that the
HV-3D is not connected to mains power. With a non-conductive tool, gently pry the fuse block away from
the power entry module. Remove the two fuses and replace both with type as shown below. Slide out the
internalPCBoard, turnitover,andreinsertthePCB so that thedesiredACmainsvoltageappearsintheviewing
window.Doublecheckthatthefusesinstalledcorrespondto theACmainsvoltagerangewhichappears inthe
viewingwindow.Gentlypushthefuseblockbackuntilflushandsnug.
FUSES:
For100-120VACmains2ch,use5x20mm,400mA,slowblow,250V,Littelfuse218orequiv.
For100-120VACmains4ch,use5x20mm,630mA,slowblow,250V,Littelfuse218orequiv.
For100-120VACmains8ch,use5x20mm,1.00A,slowblow,250V,Littelfuse218or equiv.
For200-240VACmains2ch,use5x20mm,200mA,slowblow,250V,Littelfuse218orequiv.
For200-240VACmains4ch,use5x20mm,315mA,slowblow,250V,Littelfuse218orequiv.
For 200-240 VAC mains 8 ch, use 5 x 20 mm, 500 mA, slow blow, 250 V, Littelfuse 218 or equiv.

5
HV-3D

6
HV-3D
(6) POWER ENTRY "IEC Power Receptacle"
AnIEC-typeAC line-power receptacle for use with removable cords. Useonlythe power cord
provided with the HV-3D unit or equivalent U/L approved type SV, SVT, SJ, or SJT AC power
supply cord.Do notdefeat thethird pinearth ground. Ifground lifting is desired, remove the
Earth/Audio Ground Jumper strap (item number 4 above).
HV-3D FRONT PANEL
(1) HIGH RESOLUTION GAIN CONTROL
Detented, 36-position gain control employing a superior quality Grayhill mil-spec gold plated
rotary switch. Switch gain is approximately 1.5 dB per step and is inter-channel matched to
betterthan 0.08 dB at all settings. Aftera brief warm-up period, adjustment of thisswitch is
virtuallysilent. Two illuminating pushbutton switches (Green and Amber) determine the gain
"range"ofthe rotary switch. When the pushbutton switchesarenotdepressed(non-illuminated),
themicpreamp gain provided is as printed on the frontpanel (9.0 dB, 10.5 dB, 12.0 dB, etc..).
Whenthegreenpushbuttonswitch(only)isdepressed and illuminated, add 18 dB to the gain
settingsasprinted on the front panel. When the green and amber switchesareboth depressed and
illuminated,add 36 dB to thegain settings as printed onthe front panel. For example, with both
pushbuttonswitchesdepressed and the rotaryswitchat12:00 o'clock position, the preampgain
would be 54 dB (18 + 36).
(2) PHANTOM POWER SELECT SWITCH ("+48V")
Illuminatingpushbutton switch which providesphantompower(+48VDC) to themicrophone
inserted into that channel. When this switch is depressed (illuminated red), phantom power is
applied simultaneously through dual 6.81k ohm resistors to pins 2 and 3 of the three pin
female XLR input. Use phantom power with condensor and other microphones requiring
traditional phantom supply. CAUTION: Applying phantom power to ribbon microphones
could damage them. Do not use phantom with ribbons, moving coil, and other microphones
which do not require phantom power. Use care, as well, to not insert or extract mic cables
from the HV-3D when phantom power is active.
(3)HIGHVOLTAGESELECTSWITCH("+130V")Optional
IlluminatingpushbuttonswitchwhichselectsthefourpinXLRinput(+130VDC)forB&K(Dan-
ishPro Audio) high voltage microphones type 4003, 4004,4009, and 4012. When this switch is
depressed(illuminated amber), the HV-3D receives mic-level audiofrom the four pin XLR input.
Ifyouare using a B&K (DPA) high voltage microphone with four pin XLR connectors, depress
thisswitchso that it illuminates. If a conventionalmicrophoneisused,donot depress this switch.
TheHV-3D will not combine ("mix") both conventional and high voltage microphoneson one
channel.NOTE:The HV-3D is designed to provide uninterrupted DC power to B&K (DPA) high
voltagemicrophones,regardlesswherethisswitchis set. Use care that high voltage microphone
cablesarenot inserted or extracted from the unitwhenpowerison.
(...continuedonpage8)

7
HV-3D

8
HV-3D
(4) SIGNAL INDICATORS "OL" & "SP" LEDs
Thegreen "signal present" (SP) LED indicates that a nominal signal is present atthe microphone
input. It is set to illuminate in the neighborhood of -35 dBu. The red "overload" (OL) LED has
beenset to illuminate when thebalanced output reaches a levelof +25 dBu. However, the HV-
3Dcanproduceunclipped,undistortedlevelsovertwicethisvoltage.Hence,theoverloadLEDisnotan
indicationof preamp clipping. Rather, it is ageneral reference showing a nominal "system" peak
level.Ifclippingisoccuringinyourrecording path, check all devices connected after the HV-3D
andreducesystem gains accordingly. In the event that B&K (DPA) 4004 or 4012microphonesare
usedwith hazardous sound pressures (over 130dB, SPL), an attenuator may berequired between
microphoneandpreamp.
(5) PILOT INDICATOR LIGHT
LEDwhich,whenilluminated,showsthattheHV-3Dunitispoweredupandactive.
(6) POWER SWITCH "POWER"
Rocker switch for switching AC line power on and off.

9
HV-3D
HV-3D GENERAL SPECIFICATIONS
THD + Noise, 20 Hz - 30 kHz, 35 dB gain < .0007%, typ .002 % maximum, +27 dBu out
FrequencyResponse-3dBpoints Sub 2 Hz to beyond 500 kHz
FrequencyResponse,Interchannel Deviation < .10 dB
MaximumInput Level +23 dBu
MaximumOutputLevel +32dBu
Input Impedance 6,200 ohms, nominal
OutputImpedance 24.3 ohms
Noise (Commonsource) -73 dB @ 60 dB gain (-133 dB EIN)
(30 ohm source) -71 dB @ 60 dB gain (-131 dB EIN)
(150 ohm source) -68 dB @ 60 dB gain (-128 dB EIN)
Common Mode Rejection Ratio > 70 dB @ 35 dB gain, 100 mV, to 20 kHz
>85dBtypical
Three-pin XLR Polarity Pin2 = positive polarity, Pin 1 = ground
Four-pin XLR Polarity Pin1=ground,Pin2=noconnection
Pin3=+130 VDC (limited to 7 mA)
Pin 4 = unbalanced audio
ELECTRO-MECHANICAL SPECIFICATIONS
Power Consumption 30 Watts (4 ch), nominal
Power Requirements 100VAC to 240VAC, 50/60Hz, selectable
Fuses(2 required) 2 ea (5 x 20mm, slow-blow, 250V)
see "Rear Panel" section of manual for values
Internal DC Power +130V,+48V, +25V, -25V
Dimensions 19" W x 12.5" D x 3.5" H
Net Weight aproximately 25 pounds (8 ch)
Millennia Media reserves the right to change specifications, delivery, and pricing without notice.

10
HV-3D
A WORD ABOUT DPA (Brüel & Kjær) MICROPHONES
At present, Danish Pro Audio (formerly Brüel & Kjær Pro Audio Division) manufactures two
families of 4000-series professional recording microphones. One family is +48VDC phantom
powered, the other is +130VDC direct powered. A primary difference between omni families
(4003/4 vs. 4006/7) is that the high voltage microphones are transformerless whereas the
phantom powered varieties are transformer coupled. Millennia Media has used both varieties
extensively with symphony orchestra, choir, jazz ensemble, pop recording, and so forth. We
have found the transformerless high voltage omni version to perform substantially better than
its transformer-coupled omni counterpart. The transformerless version (4003) sounds gener-
ally "clearer" and more true to the source; especially during wide frequency and amplitude
extensions. And this is saying a lot considering that DPA's transformer-coupled microphones
sound extremely pure.
The following is a brief summary of certain DPA high-voltage microphone products and
specifications. Most of this material is taken directly from DPA's documentation is is thought
to be accurate, however, Millennia Media assumes no responsibility for errors or subsequent
changes in the following specifications. Those desiring up-to-date information concerning DPA
microphones should contact DPA directly.
4003 4004 4012
PATTERN Omni Omni Cardioid
SELF-NOISE 15 dB(a) 24 dB(a) 19 dB(a)
SPL (max) 154 dB SPL 168 dB SPL 168 dB SPL
FREQ (-3dB) 8 Hz - 30 kHz 8 Hz - 45 kHz 35 Hz - 25 kHz
IMPEDANCE < 30 ohms < 30 ohms < 30 ohms
SENSITIVITY 50 mV / Pa 10 mV / Pa 9 mV / Pa
A number of options are available for the 4003 microphone. One grid, the 0777, provides
superior omnidirectional response throughout the high frequencies. Another grid, the 0297,
provides a high frequency presence boost. The standard grid provides the most accurate
response on-axis. A development called the APE (acoustic pressure equalizer) tailors the 4003
to respond like vintage M-50 or newer TLM-50 microphones. The various APE attachments
boost mid to high frequencies arriving on axis without exhibiting proximity effect at lower
frequencies. When used with various grids, numerous polar patterns and response curves can
be achieved.
DPA offers a service of factory-matching new pairs of microphones for tight stereo tracking of
sensitivity and frequency response. Millennia Media highly recommends this service and can
assist customers in obtaining these microphones. The HV-3D micamp circuits maintain near-
perfectly flat, inter-channel matched frequency response and less than 1/4 degree of
interchannel phase error — a perfect compliment to a factory-matched pair of DPA micro-
phones.

11
HV-3D
WARRANTY
Millennia Media will repair this product, free of charge, in the USA, in the event of defect of
materialsorworkmanshipforone (1) year following date of purchase. This warranty is extended
onlyto the original purchaser.Thislimitedwarranty covers failures due onlytodefectsin materials
andworkmanshipwhichoccur during normal, intended use and does not cover damage which
occursinshipmentorfailureswhicharecaused by products not supplied by Millennia Media. This
limitedwarrantydoesnot cover failures which arise fromaccident,misuse,abuse,neglect,mishan-
dling,misapplication,faulty installation, improper adjustment, alterationormodificationof
product,incompatibilities,line-powersurges,actsofGod,orserviceperformedbyanyoneother
thanMillennia Media or its authorizedagent. Vacuum tube failures are not covered under war-
ranty.
LIMITS AND EXCLUSIONS
Therearenoexpresswarrantiesexceptaslisted above. Millennia Media shall not be liable for
special,subsequent,incidental,consequential,orpunitive damages, including, but not limited to:
damagetorecordings, microphones, mixing consoles,oranyassociated equipment, downtime
costs,lossofgoodwill, or claims of any party dealing with purchaser for such damages resulting
fromtheuseofthisproduct.Allwarranties,expressandimplied,includingthewarrantiesof
merchantabilityandfitnessfora particular purpose are limited to the applicable warranty period
setforthabove.
Somestatesdonot allow the exclusion or limitation ofincidentalorconsequentialdamages,or
lengthoftimean implied warranty remains in effect. As such, the above exclusions may not apply.
Thiswarrantygivesyouspecificlegalrightsandyoumayalsohaveotherrightswhichcanvary
fromstate to state.
MUSIC & MEDIA SYSTEMS
MillenniaMedia,Inc.
4200-BDay Spring Court
Placerville, CA 95667-9500
T 530-647-0750
F 530-647-9921
[email protected]
http://www.mil-media.com
The HV-3D is hand-crafted in USA
Manual printed in USA