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Nady HPA-4 4-Channel Rackmount Headphone Amplifier

B&H # NAHPA4 Mfr # HPA-4
Usually ships in 7-14 business days

Availability Details

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This is a Special order item. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment. Item is non-cancelable and non-returnable.
PayPal Orders
PayPal orders will be charged when the order is placed.
International Orders
International orders will be charged when the order is placed.

Free Standard Shipping
Not eligible for free Expedited Shipping
You Pay: $93.99
Product Highlights
  • 1RU Rack Chassis
  • 4 Independent Stereo Channels
  • 1/4" Inputs and Outputs
  • Individual Volume Controls
  • Daisy-Chain Capability
  • Internal Switchable Power Supply

The HPA-4 from Nady is a high-quality stereo headphone amplifier that provides 4 independent channels in a compact and rugged 1RU rackmount chassis. Each channel features 1/4" phone and line stereo outputs, as well as servo-balanced L/R 1/4" inputs. Selector switches let you choose to send any input to any output. This creates terrific versatility, allowing all 4 headphone outputs to monitor the same input signal, or each monitor its own unique input.

Each channel has its own volume control, letting users pick the level that's best for them. Thanks to the versatile outputs, up to 4 units can be daisy-chained together for additional headphone and line distribution setups. The amplifier features high-quality components with a no-compromise circuit design to provide reference-quality audio and excellent headroom, even at high volume levels. The shielded internal power supply has a selectable voltage for convenient international use.

Compact and rugged 1RU rackmount chassis fits in any standard equipment rack
4 totally independent stereo channels
Each channel has 1/4" phone and line output connectors to support a variety of monitoring and line distribution options
Each channel has its own 1/4" servo-balanced L/R inputs
Input source select switches enable independent selection of any of the input signals for each headphone/line output. This lets you send the same signal to each output, different signals to each output, or a mix for terrific versatility
Independent volume controls adjust the level of both the headphone and line outputs on each channel
The versatile output options allow up to 4 units to be daisy-chained together for additional headphone and line distribution setups
The amplifier features high-quality components with a no-compromise circuit design to provide reference-quality audio and excellent headroom, even at high volume levels
The shielded internal power supply has a selectable voltage for convenient international use
Number of Channels 4
Input Connections 4 x 1/4" Servo-Balanced Inputs (L/R)
1 x AC Power Input
Output Connectors 4 x 1/4" Stereo Headphone Jacks
4 x 1/4" Stereo Line Outputs
Maximum Output Level 300mW @ 32 Ohms
Function Controls 1 x Power Switch
4 x Volume Knobs
4 x Input Select Switches
1 x Voltage Select Switch
Frequency Response 20Hz - 20kHz
THD + N 0.02%
Signal to Noise Ratio > 80dB
Display No
Power Requirements 100-240VAC, 50/60Hz, Selectable
Power Consumption 11.5VA
Fuse 100-120VAC: 630mA (Slow-Blow)
200-240VAC: 315mA (Slow-Blow)
100-240VAC: 500mA (Slow-Blow)
5x20mm Glass Type
Dimensions (HxWxD) 1.75 x 19 x 8.5" (44 x 483 x 217mm)
Weight 6.93 lbs (3.15kg)
Nady HPA-4 4-Channel Rackmount Headphone Amplifier
  • Power Cord
  • 1-Year Limited Warranty
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