Content | Precision Headphone Amplifier
- Based on the headphone amplifier section of the Rupert Neve Designs 5060 Centerpiece
- Three switchable inputs (XLR, RCA, mini-jack)
- Solid steel housing
- Output impedance: 0.08 Ohm at 1KHz
- Frequency response: +/- 0.2 dB from 10 to 12,0000 Hz
- Power supply: 24 V via an external 6 W power supply (included) or via battery
- Dimensions (W x D x H): 165 x 117 x 48 mm
| The LD Systems HPA 1 is a versatile headphone amplifier with high power output for stage, studio and home recording and is the perfect solution for wired in-ear-monitoring.. The compact device in a rugged, ergonomically shaped plastic housing with soft-touch surface and practical belt clip is very extensively equipped.
In addition to locking XLR connectors for the stereo signal L/R input, the HPA 1 has a balanced 3.5 mm stereo jack as AUX input, which can be used in parallel for clicks or playback. It is protected for safe operation against excessive input levels; a hollow pin socket with negative internal contact enables the connection of a network adapter for fixed operation.
A 3.5 mm stereo jack is provided as earphone and headphone output. Volume level and balance can be set with easy-grip knobs, a push-button switches between the summed mono and stereo signals. A full-fledged limiter is integrated for distortion-free playback and as protection against feedback.
The LD Systems HPA 1 has bi-colour LEDs to facilitate the features overview, which displays the response of the limiter during peaks and the battery status. At 165 grams, the headphone amplifier is distinctly light-weight and can be operated for up to 12 hours thanks to a high quality 9 V block battery.
- 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
| Palmer Monicon, and the volume is right!
With Palmer Monicon, your monitor volume is always under control. The passive mini-mixer with the oversized control is inserted between the stereo output of the notebook, PC or interface and an active monitor system and thus permits convenient and precise volume control of the monitors from the workstation. The passive circuitry with only a few components has absolutely no affect on the sound. Mute and mono buttons make it possible to mute the outputs and merge the stereo output signal into a mono master signal.
The inputs and outputs of the controller are equipped with XLR connectors and the 3.5mm stereo TRS sockets usually found on computers. Combo input sockets also permit connection with 6.3 mm TRS plugs. Thus the Palmer Monicon is compatible with both professional and consumer equipment. Genuine wood sides make the practical studio tool in its massive powder-coated sheet steel housing an elegant looking "little helper" that is a typical Palmer product.
- Type: passive
- Number of channels: 2
- Number of inputs: 2
- Input connections: XLR Combo / 3.5mm stereo jack
- Input type: balanced/unbalanced
- Maximum input level: +20 dBu
- Input impedance: 10 kohms balanced/ 5 kohms unbalanced
- Number of outputs: 2
- Output connections: XLR/m, 3.5 mm stereo jack
- Output type: balanced/unbalanced
- Max output level: +20 dBu
- Output impedance: 600 ohms
- Frequency response: 10Hz - 40 kHz +/- 1 dB
- THD: 0,001 %
- Max. attenuation: 85 dB (attenuator), 112 dB (attenuator + mute)
- Controls: Attenuation, Mute, Mono
- Housing material: sheet steel/wood
- Housing surface: powder-coated
- Width: 164 mm
- Height: 62 mm
- Depth: 85 mm
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- All-passive volume control circuit
- Stereo and AUX inputs
- Dual outputs
- Additional mono output
- Balanced and unbalanced connection
- Integrated high quality headphone amplifier
- Mono, mute and PFL switches
- Stereo volume, AUX and headphone level controls
- Elegant design with solid wood side panels
- Built to last
The Palmer Monicon® L is a precise, analogue volume control that connects between a computer or audio interface and active monitor speakers. The switch is completely passive and distortion-free, the LED displays and built-in headphone amplifier are powered via the included power supply.
Symmetric combo sockets serve as stereo input. The Monicon® L’s AUX input features RCA sockets and a 3.5 mm stereo jack. The compact console offers outputs for two monitor pairs and a mono summed output via XLR sockets. The stereo or AUX input can be selected alternately, the two outputs individually and together. In addition to its large volume controller, the Monicon® L is also equipped with mono, mute and PFL switches, a 6.35 mm headphone output, and separate AUX and headphone controllers for convenient operation.
Product type
Other Studio and Recording Equipment
Channels
2
Inputs
2
Input connectors
3.5 mm TRS , RCA , XLR
Input type
balanced/unbalanced (depending on TS/TRS connection)
Max. input level
20 dBu
Input impedance
(balanced) 10k Ohm(s) , (unbalanced) 5k Ohm(s)
Outputs
3
Output connectors
XLR
Output type
balanced/unbalanced (depending on TS/TRS connection)
Max. output level
20 dBu
Output impedance
600 Ohm(s)
Frequency response
10 - 40000 Hz
THD
0.001 %
Max. attenuation
(Attenuator + Mute) 112 dB , (Attenuator) 85 dB
Controls
attenuation , input selector , mono , mute , output selector , PFL source
Cabinet material
sheet steel , wood
Cabinet surface
Powder coated
Width
218 mm
Height
77 mm
Depth
100 mm
Weight
1,14 kg | The new HP4 from PreSonus answers the need for a headphone distribution
amplifier with professional specifications in a small package at an affordable
price. The HP4 features four discrete headphone outputs on the front panel
each with its own volume potentiometer and 150mW of amplification per channel.
The HP4 also features adjustment over control room monitors with a separate
volume control, monitor mute switch and mono switch giving you an extremely
powerful monitoring solution at an amazingly low price.
Features
? Four High Power Headphone Outputs
? Ultra loud (150mW per channel)
? Ultra quiet operation
? Musical Wide Dynamic Range
? Control Room Monitor Outputs with Level Control
? Mono or Stereo Operation
? Monitor Mute Switch
? Daisy Chain an Infinite Number of Units
? Compact package
Technical Specifications
Input
TRS Impedance 10K Ohms
Panel Controls
Headphone Level 1 to 12
Monitor / Feed Output -80dB to +10dB
Mono Switch
Monitor / Feed Mute
Power Supply
Type Linear
Input 16VAC/1000mA
Output
TRS Balanced 51 Ohms Impedance
Performance
THD+Noise (Unweighted) 0.002%
Noise Floor -98dB
Signal To Noise >95dB
Power Supply Rejection >98dB
Power 16 Watts
Physical
Weight 5lbs./ 2.3 kg.
Dimensions 5.5 x 5.5 x 1.75
Mounting Max Rack and Universal Rack Tray
Chassis Steel
Panel Brushed Aluminum
Sides Cast Aluminum |
INPUT: 1 audio stereo, 1Vpp/50kΩ on a 6.5mm stereo phone socket.
OUTPUTS: 5 audio stereo, 500mW/8Ω on 6.5mm stereo phone sockets.
AUDIO BANDWIDTH (-3dB): 25kHz.
CONTROL: 5 stereo output level controls (front), 1 mono switch (rear).
GAIN RANGE: -60dB to +10dB.
S/N RATIO: 78dB.
THD: 0.08% @100mW.
POWER SOURCE: 12V DC, 370mA nom, 1A max.
DIMENSIONS: 16.5cm x 12cm x 4.5cm (6.5” x 4.72” x 1.77”) W, D, H.
WEIGHT: 0.68kg (1.5lbs) approx.
ACCESSORIES: 12V DC power supply.
OPTIONS: RK-1 19" rack adapter.
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