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LANGEVIN HP-101 STUDIO HEADPHONE SYSTEM NOW THE MUSICIANS CAN MIX IT HOWEVER THEY LIKE! We subtitle this unit "THE MORE ME BOX" because this is possibly its most important feature. Along with the typical cue mix or the control room mix, the engineer can offer each musician a fader dedicated to their own instrument. Experience teaches us that each musician always wants to hear more of themselves and that trying to meet this demand with several musicians and with too few aux sends is quite a mind bending challenge. As long as each musician's headphone is plugged into a separate station, each can have their own custom mix within arms reach. This frees up the engineer to concentrate on recording and getting the best sound and allows the producer to focus on performances because the musicians’ monitoring needs are met quickly and easily. It also frees up console aux sends so that they may be used for effect sends. With this station you will be able to offer musicians a better sounding headphone amp than most major studios and be able to provide some significant improvements over basic stereo cue boxes or any other headphone system we know of. Each HP-101 station provides 8 x balanced inputs: four mono channels with FADER and PAN plus two stereo feeds with rotary switches providing stereo, mono and SIM processing. This cool SIM setting monos the bass which makes it sound more like listening to real speakers. Channel one has a PHASE switch, intended primarily for the vocalist. Voice is heard through the bones in the head as well as the phones. You may not hear much difference switching the phase in the control room but the person at the mic certainly will. Polarity gets inverted all the time in studios which may explain why sometimes the vocal is so loud in the phones or sounds different on playback to the singer. Our PHASE switch sure does come in handy. The 8 inputs appear on ELCO multi-connectors, wired to ADAT standard, making linking or daisy-chaining several stations easy. See ELCO pinout here. We approach cable making as a custom order which means prices depend on length and quantity and connector choice. Please contact us for a factory quote.
Additionally, a 12 channel version is available, the HP-112. All features are the
same as the HP-101 8 channel model except there are 4 more mono inputs.
Yes the HP-101 8 channel units and the HP-112 12 channel units can be
mixed in the same installation as far as the ELCO cabling is concerned
however, the 8 channel units won't receive signal channels 9-12 from
the 12 channel units. (Duh.) All the rest of the functions (talkback,
logic, Interrupt, Mic etc.) are 100% compatible between both models. See
HP-112 ELCO pinout here. The Mute controls the Power Amps directly and steps through ON, MUTE, LEFT MUTE and RIGHT MUTE then back to ON. Each station also has bass and treble EQ controls carefully optimized for headphones. The master stereo volume control feeds the built-in power amps which produce peak voltage (equivalent to) well over a hundred watts per channel to drive up to 4 headsets at any volume the musician may choose. No weeny little beetles like you’d find in your walkman here! The two features that impress the musicians the most are the easy
communication with one button and the fabulous sonic quality even at extreme levels. Ever
clever, the ELCO connectors also provide pins used for several other communication and monitoring functions,
including TALK and INTERRUPT. There are also hidden features on the
ELCO’s such as the ability for the control room to monitor each station’s headphone mix or the to hear the unswitched
"always-on" individual station microphone.
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Features And Specifications |
HP-101 ELCO Hook-up notes & HP-101 ELCO pinouts
How to wire the TALKBACK features into your control room
HP-101 Grounding Modification 11/2003
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Langevin Studio Headphone System SPECIFICATIONS: INPUTS: All inputs on ELCO/EDAC 56-pin connectors 40Kohm input Z • Channels 1 - 4: Balanced line-level mono with 60 mm fader and pan pot • Channels 5 - 6: Balanced line-level stereo with 60 mm fader switchable Mono, Stereo or Stereo Image Manipulation (SIM) • CMRR greater than 70dB with source Z< 150 ohm
HEADPHONE OUTPUTS: Four 1/4" stereo headphone jacks connected in parallel • Peak to peak voltage: typically 50 volts into 100 ohms • Power output: 3 watts RMS into any load from 4 to 100 ohms • Output impedance less than 0.1 ohm • Built-in protection against overvoltage, undervoltage, overloads, shorts to the supplies or outputs, thermal runaway, and most other catastrophes. • No power-down / power-up thumps, pops, or DC • Multi-mode MUTE button ("panic button") • THD + Noise: < .03% (-70dB) • Tone controls > +/- 12 dB @ 100 ohms & 10 Kohms (gentle slope)
COMMUNICATION: • DC control voltage enables individual stations to receive TalkBack signal • Built in MIC and TALK button, 2 LEDs show TalkBack mode • MIC and SWITCHED MIC signal available via ELCO input POWER SUPPLY: • Dedicated external PSU per station. • Power consumption (120/240VAC): 13 watts
GENERAL INFO: •
Dimensions: 11 1/4" x 7 3/4" x 2 1/2"
TECH HINTS for LOWEST NOISE: 1. They like balanced power from the Equitech.
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Optional accessories available for the HPA-101
See the
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Manufacturer's Suggested Retail Price: Langevin HP-101 8-channel model: $1,600 each with PSU Langevin HP-112 12-channel model: $2,000 each with PSU Mic stand mounting Bracket: $40 USD |
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Here's a cool thing: Bob
over at Sound
Anchors custom fabricated these massive heavy duty stands for a
client's HP-112 12 channel mixer. See how he integrated the power supply
mounting onto the base of the stand. Very clever! I am sure he would love
to sell more of them so if that turns you on, go chat with Bob over at Sound
Anchors. He also makes superb amplifier and speaker stands as well as
equipment racks.
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How To Wire up your Communication Features PDF
More Wiring Notes from Hutch:
The logic is based on a spare op-amp that is tricked out so that when the
two lines (Elco a & b) are simply shorted, the TALK function is engaged.
This was intended for footswitch and box-to-box operation mainly.
Alternatively each line (Elco a or b) can be shorted to ground to enable
TALK or INTERRUPT. This method is pretty easy to interface either with relays
or a dedicated hard-wired switch.
The last alternative gets a bit trickier, and relies on a differential
voltage applied to a and b. Can be thought of as "If a is (significantly)
more positive than b then INTERRUPT", "If b is (significantly) more
positive
than a then talk", "If both are similar then do nothing. This mode
might be
considered a differential comparator. If I remember that far back, it should
work with standard 5V logic and definitely does with 9-15 volt, and suggest
static protected 3-state buffers or open collector transistor logic for
reliability.
We were planning to offer an "control room interface box" but nobody
requested one, so ......
Reading between the lines, there is some DC on both lines, which fouls the
idea of straight TTL 2 state control (0volt). And if memory serves, a little
experimentation goes a long way, because there seemed to be lots of ways to
control either or both of those states, and awfully damn difficult to blow
something up re those 'logic' lines.
Of course we could have used an 'iso-oplitator' and schmitt, standard logic
levels, etc and dressed formally but we were a low-tech operation 12 years
ago, and had near zero board space left, and it was significantly
over-budget already, so snuck in this bogus remote circuit for a few
resistors and it works fine.
--Hutch
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