LA4 - Receiver Benchmark - Free user manual and instructions
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| Type | Stereo Receiver (Line Preamplifier) |
| Dimensions (W x H x D) | 17.5 x 3.5 x 12.5 inches (445 x 89 x 318 mm) |
| Weight | 10.5 lbs (4.8 kg) |
| Power Supply | 100-240V AC, 50/60 Hz, 20W max |
| Inputs | 4x RCA unbalanced, 2x XLR balanced |
| Outputs | 2x RCA unbalanced, 2x XLR balanced |
| Frequency Response | 20 Hz - 20 kHz ±0.1 dB |
| Total Harmonic Distortion + Noise | <0.0003% at 1 kHz, 3V output |
| Signal-to-Noise Ratio | >120 dB (A-weighted) |
| Remote Control | Yes, included (infrared) |
| Color Options | Black or Silver |
| Display | None |
| Cleaning | Wipe with a soft, dry cloth. Do not use harsh chemicals. |
| Safety | Do not expose to moisture or operate near water. Unplug when not in use. |
| Spare Parts & Repairability | Contact Benchmark support for replacement parts and service information. |
Frequently Asked Questions - LA4 Benchmark
How do I connect my LA4 to an amplifier?
Use balanced XLR cables from the LA4's XLR outputs to your amplifier's XLR inputs for best performance. Alternatively, RCA cables can be used from the RCA outputs.
Can I use the LA4 as a headphone amplifier?
No, the LA4 is a line preamplifier and does not have a headphone output. It is designed to drive power amplifiers or active speakers.
What is the purpose of the volume control?
The volume control adjusts the signal level sent to your amplifier. It is a precision potentiometer for accurate left-right tracking.
Does the LA4 have a built-in DAC?
No, the LA4 is an analog-only preamplifier. For digital sources, you will need an external DAC.
How do I clean the LA4?
Use a soft, dry microfiber cloth to gently wipe the front panel and chassis. Avoid using any liquids or abrasive cleaners.
What are the power requirements?
The LA4 operates on 100-240V AC, 50/60 Hz. It consumes less than 20W. An IEC power cord is included.
How do I pair the remote control?
The remote control works out of the box with included batteries. Point it at the front infrared sensor. No pairing needed.
Can I stack other components on top of the LA4?
It is not recommended as the LA4 vents heat through its chassis. Allow at least 2 inches of clearance above for proper ventilation.
What should I do if the LA4 has no sound?
Check all connections, ensure the LA4 is powered on and the volume is turned up. Verify that your amplifier is on and working. Try swapping cables.
Are there any firmware updates?
The LA4 is an analog unit and does not require firmware updates. All controls are hardware based.
User questions about LA4 Benchmark
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USER MANUAL LA4 Benchmark
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Product information
Brand : Benchmark
Model : LA4
Category : Receiver