Harley Benton GPA-400
Professional music gear - detailed information and where to buy
Harley Benton
GPA-400
Product Info
Article Number:
319961
Brand:
Harley Benton
Model:
GPA-400
Category:
Electric Guitar Power Amps
Price:
$207.90
* Prices may vary. Check retailer for current pricing and availability.
The GPA-400 is a surprisingly capable little power amp, perfect for gigging musicians or home studios needing a clean, powerful boost without the bulk. Its Class-D design delivers serious headroom in a compact 19in rack format, making it a great value for those on a budget looking to upgrade their existing preamp.
Product Description
- Harley Benton GPA-400
- 19 "Guitar Power Amplifier
- Lightweight Class-D technology with switch-mode power supply
- 2x 200 W @ 4 Ohm
- 2x 100 W @ 8 Ohm
- 2x 50 W @ 16 Ohm
- Bridged 400 W @ 8 Ohm and 200 W @ 16 Ohm
- Frequency range: 20 Hz - 20 kHz
- Input sensitivity: 335 mV
- Damping factor: > 80
- Signal- noise ratio: > 90 dB
- Total harmonic distortion (thd): < 0.15%
- Power consumption: 18 W (standby current)
- Dimensions (W x D x H): 482 x 250 x 44 mm
- Format: 19"/ 1 HE
- Weight: 3 kg
PROS
- • Remarkably lightweight for a power amp, eases rack mounting significantly
- • Clean, powerful Class-D amplification avoids typical harshness
- • Impressive power output across various impedance loads
- • Excellent signal-to-noise ratio minimizes unwanted background hiss
CONS
- • Limited connectivity; lacks effects loops or balanced inputs
- • Harley Benton's quality control can be inconsistent across units
- • 19in rack format restricts placement options for some users
Product Video
Key Features
Power (Watts)
2x 200W @ 4 Ohm, 2x 100W @ 8 Ohm, 2x 50W @ 16 Ohm, Bridged 400W @ 8 Ohm, 200W @ 16 Ohm
Class
Class-D
Channels
1
Impedance
4, 8, 16 Ohms
Connections
RCA Input, Speaker Outputs (4x)
Weight
3 kg
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Frequently Asked Questions
Class-D amps generally have extremely low latency, so you shouldn't experience any perceptible delay with digital amps.
It's largely transparent – it's designed to amplify your existing signal cleanly. Expect a tight, defined low end and crisp highs without coloration.
While it offers substantial power, it's best suited for a single cabinet or two smaller ones; pushing multiple large cabs might stress the amplifier and its power supply.
