FOSTEX PH-100 10-WAY HEADPHONE AMPLIFIER

The new PH-100 is a remarkably quiet, 1U rackmount headphone distribution amplifier.
Each output has its own amplifier as well as its own level control - so different individual
listening requirements can be met with ease. Multiple PH-100s can also be cascaded
to handle a large number of listeners making it ideal for orchestral, multimedia, education
and trade show applications. The PH-100 is especially handy in the studio environment
because an output from the mixer can send a talkback signal to the Aux input (complete
with level control) of the PH-100 and be distributed to all headphone outputs. This great
cue system makes for more effective communication between engineer/producer and
musicians.
Flexibility is further enhanced with all ten outputs being available both on the front and r
ear panels.

    * Ideal for studio, orchestral, education, multimedia, conference and exhibition applications
    * 10 headphone outs - each with its own amplifier
    * Each input routes to its direct output, plus Aux 1 source (cue feed)
    * Multiple inputs: XLR, phone, RCA pin jacks
    * +4dBu or -10dBV switchable for balanced inputs
    * Individual level controls with peak reading LED
    * Stereo or mono input select
    * Cascade inputs & outputs for ?daisy chaining? units
    * Aux In with level control for cue feed from main mixer

SPECIFICATIONS:

INPUT
INPUT L, R (balanced)
Connector XLR-3-31 x 2, phone x 2
Input Level +4dBU (XLR-3-31), -10dBV (phone)
Input Impedance more than 10k ohm

INPUT L/MONO, R (unbalanced)
Connector RCA pin x 2
Input Level -10dBV
Input Impedance more than 10k ohm

AUX In L/MONO, R (unbalanced)
Connector RCA pin x 2
Input Level -10dBV
Input Impedance more than 10k ohm

CHANNEL IN 1-10 (unbalanced)
Connector RCA pin x 2
Input Level -10dBV
Input Impedance more than 10k ohm

OUTPUT
PHONES OUT 1-10
Connector Phone x 20
(10 each on front/rear, priority on front outputs)
Maximum Output Level 500mW
Impedance 8 ? 32 ohm
Frequency Response 30Hz ? 20kHz +/-1dB
Residual Noise less than -65dBV
THD less than 0.3%

CASCADE OUT L,R
Connector RCA pin x 2
Output Level -10dBV
Frequency Response 30Hz ? 20kHz +/-1dB
S/N less than -80dBV
THD less than 0.1%

PHYSICAL
Dimensions 484 (W) x 49 (H) x 267 (D)
Weight approx. 4kgs.
Power 120V / 230V
Power Consumption 18W

The PHDA02 - a reference class headphone amplifier with Stereo, Mono, and Dual Mono operation modes.

In Stereo mode, the L/R input signal is fed to the left and right earphones while the volume level is set by the Stereo/Left control. The front panel inputs provide simultaneous connection of two headphones in parallel. In Mono mode, the left and right channels are summed, and the resulting mono signal is fed to both the left and right earphones. Again, volume is governed by the Stereo/Left control. In Dual Mono mode, the left and right channels can be used independently with individual level controls for the left and right earphones.

The PHDA02 operates with all headphones with an impedance of 8 up to 200 Ohms. Impedance matching is achieved by a specially designed switchable transformer. Uncommon and costly, this solution provides superior performance, dynamic range, and signal-to-noise ratio at all loads.

Combo input sockets allow for balanced XLR and unbalanced TS headphone connection while parallel XLR outputs facilitate daisy chaining multiple units. The integrated power supply operates with mains from 100 VAC to 240 VAC.

The PHDA02 is equipped with low-noise op amps, and the output amplifiers' discrete power transistors are mounted on heatsinks. Dimensions are 1 U 9.5“.

• Model Name: LDHPA1
• Product Type: headphone amplifier
• Type: 1-channel stereo
• Inputs: Main Input (Stereo), 1 x Aux In (Stereo)
• Input Connections: XLR-F (L + R Input, balanced), 3.5 mm stereo jack (Aux In)
• Input Impedance: 6 kOhm (XLR In), 10 kOhm (3.5 mm jack)
• Input Sensitivity: 3 dBu (XLR In), -6 dBV (3.5 mm jack)
• Max. Input Level: 16 dBu (XLR In), 7 dBV (3.5 mm jack)
• Protection Circuits: Audio Limiter, Max. Input leveling, Power OFF -Mute relay
• Headphone Outputs: 1
• Headphone Output Connectors: 3.5 mm stereo jack
• Power Output: 2 x 1.65 Vrms / 1% THD 33 Ohm Load
• Minimal Connected Impedance per Channel: 16 ohms
• Frequency Response: 20 Hz - 40,000 Hz
• THD 1 kHz Sine: 0.04%
• Controls: Power/Volume, Balance L/R, Stereo/Mono (Focus) switch,
• Indicators: Signal (Green) / Peak (Amber), Battery (low battery: red) / Power LED (Power ON: green)
• Power Supply: 9 V DC block battery, DC jack
• Operating Voltage: 9 V DC
• Power Consumption: Nom. 70 mA / Max. 150 mA
• Housing Material: plastic
• Housing Surface: soft-touch
• Housing Colour: black
• Width: 80 mm
• Height: 42.5 mm
• Depth: 133 mm
• Accessories (included): belt clip, 1 m 3.5 mm stereo jack cable

MyMONITOR - Personal Headphone Monitor Mixer Overview

Problem: A performer needs to hear him/herself through headphones exclusively or mixed
with the output of a mixer, CD player, tape deck, or other stereo line level source. Only the
mic signal, however, should be going to the main mixer.
Solution: Connect MyMONITOR between the mic and line source, and the mixer. The Mic
and line Monitor levels can then be adjusted for mix and volume through the headphones.
Only the mic signal will go to the board. And since MyMONITOR can be AC or battery powered,
the unit can be used on a large stage or wherever there is no AC outlet nearby. Dynamic or
condenser mics can be used since phantom power would come through the Mic Thru jack from
the mixer or other source.

MyMONITOR - Personal Headphone Monitor Mixer Specifications:

Signal To Noise Ratio 90dB
Gain 15dB (1/4 in), 50dB (XLR)
Maximum Input Level -20dB mic, 40dB Monitor
Output Impedance 10 ohms
Power Requirements 12V DC (Adapter included) or one 9V battery
Phantom Power ON/OFF switch
Power LED indicator
Dimensions 4.5x2.75x1.5 inches (112mm x 72mm x 40mm)
Weight 1.3lb (590g)

Overview

With Sennheiserʼs HDVD 800, sound is perfect. The HDVD 800 is able to connect with digital sources and is equipped with a high-quality Burr-Brown digital/analog converter (DAC) that converts digital audio data into analog signals with a resolution of 24 bits and a sampling rate of up to 192 kHz. This enables the HDVD 800 to transmit the entire frequency spectrum of high-end audio sources without any loss of frequencies.

In addition to the symmetrical inputs, the HDVD 800 also has an asymmetrical input socket; incoming signals are symmetrized before further processing takes place. Digital sources can be connected to the rear of the unit via an XLR (AES/EBU) input, optical and coaxial (S/PDIF) digital inputs or USB. All digital inputs accept signals up to 24 bit at 192 KHz*. Designed and manufactured in Germany, this high-end, solid-state amplifier harmonize perfectly and deliver an ultimate acoustic performance when paired with any of Sennheiserʼs audiophile headphones.

Features
D/A transducer for all common formats up to 24 bit / 192 kHz
D/A transducer can be used for CD and DVD players
AES/BU, S/PDIF, USB inputs
Symmetrical (XLR) and asymmetrical (RCA) analog inputs
Symmetrical output
Sockets for four sets of headphones (two of which symmetrical)