HPA4 - Audio Amplifier Benchmark - Free user manual and instructions
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| Product Type | Headphone Amplifier |
| Brand | Benchmark |
| Model | HPA4 |
| Inputs | Balanced XLR, Unbalanced RCA |
| Outputs | Balanced 4-pin XLR, Unbalanced 1/4" TRS |
| Frequency Response | 20 Hz - 20 kHz ±0.05 dB |
| THD+N | < -120 dB (typical) |
| Maximum Output Power | 2.5 W into 32 ohms (per channel) |
| Gain | Adjustable, up to 18 dB |
| Impedance Range | 16 ohms - 600 ohms |
| Power Supply | AC 100-240 V, 50/60 Hz, internal linear |
| Dimensions (W x D x H) | 8.5 x 10.5 x 2.1 inches (216 x 267 x 53 mm) |
| Weight | 5.5 lbs (2.5 kg) |
| Construction | Aluminum chassis, steel top cover |
| Cooling | Passive, no fan |
| Protection | Short circuit, overcurrent, thermal |
| Cleaning | Wipe with dry or slightly damp cloth |
| Spare Parts | Contact Benchmark for authorized service |
| Manual Language | English (available in other languages via request) |
Frequently Asked Questions - HPA4 Benchmark
What is the Benchmark HPA4?
The HPA4 is a high-performance headphone amplifier designed for professional and audiophile use. It features balanced inputs and outputs, ultra-low distortion, and precise volume control.
Can I use the HPA4 with my studio monitors?
No, the HPA4 is a dedicated headphone amplifier. For speakers, consider a separate power amplifier or integrated amplifier.
What headphone types are compatible?
The HPA4 works with most headphones having an impedance of 16 to 600 ohms. It provides ample power for high-impedance audiophile models.
How do I connect balanced headphones?
Use a 4-pin XLR balanced cable. The HPA4 has a dedicated 4-pin XLR output for balanced headphones. Ensure the cable is wired correctly.
What is the warranty for the HPA4?
Benchmark offers a 5-year limited warranty on the HPA4, covering defects in materials and workmanship.
How to clean the HPA4?
Unplug the unit and wipe with a soft, dry cloth. Avoid liquids and abrasives. For stubborn dirt, use a slightly damp cloth.
Can I use the HPA4 with a portable device?
Yes, but it requires an AC power source. It is not battery-powered. Use it with a DAC or audio interface for best results.
Does the HPA4 have a remote control?
No, the HPA4 is manually operated with front panel controls. Volume and gain are adjusted via knobs.
How to troubleshoot no sound?
Check connections: ensure input source is active, cables are fully inserted, and the mute switch is off. Verify gain and volume levels.
Where to download the manual?
The user manual is available for free in PDF format on the official Benchmark website or from third-party manual repositories.
User questions about HPA4 Benchmark
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USER MANUAL HPA4 Benchmark
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Product information
Brand : Benchmark
Model : HPA4
Category : Audio Amplifier