LD Systems HPA 4
Professional music gear - detailed information and where to buy
LD Systems
HPA 4
Product Info
* Prices may vary. Check retailer for current pricing and availability.
The LD Systems HPA 4 is a surprisingly useful little headphone amp for budget-conscious recording studios or live rigs. It's perfect for tracking sessions where you need to send different mixes to multiple musicians – a real workhorse for simple monitoring needs, though don’t expect audiophile performance.
Product Description
- LD Systems HPA 4
- 4-Channel headphone amplifier
- 4 Adjustable headphone outputs
- 6.3 mm Stereo jack connectors
- RCA L / R and 6.3 mm jack input
- Switchable mono stereo
- Operates with external DC power supply
- Max. output power: 4x 100 mW
- Input impedance: 1 kOhm
- Incl. 24 V DC power supply
PROS
- • Four independent channels simplify monitoring for multiple musicians.
- • RCA inputs offer broad compatibility with existing studio gear.
- • Compact design saves valuable rack space in cramped environments.
- • The included power supply removes the need for separate purchases.
CONS
- • Output power is modest; not ideal for high-impedance headphones.
- • Build quality feels budget-oriented; plastic enclosure feels somewhat flimsy.
- • Mono/Stereo switch lacks a true mono sum – just a simple inversion.
Product Video
Key Features
Channels
4
Power
4x 100 mW
Impedance Range
1 kOhm
Connections
RCA L/R, 6.3 mm Stereo jacks
Weight
Approximately 1.5 kg
Similar Products
KNA Pickups PAS-24 Audio Interface
USB Audio Interfaces
$142
Audio Interface, Studio quality with 24-bit/192 kHz, Loopback function, Controls:...
Ekustik Woody Queen Absorber Oak Creme
Broadband Acoustic Absorbers
$318
Absorber, For medium and high frequencies, For optimising the room sound in...
Palmer Monicon S G2
Studio Monitor Controllers
$54
Passive Monitor Controller, Inputs: 1 x Stereo (RCA), Outputs: 1x Stereo (RCA), MONO switch for...
Kawai K-200 ATX 4 WDB Piano
Pianos
$9,119
Piano, With AnytimeX-4 equipment, Millennium III mechanics with ABS carbon parts of...
Teenage Engineering TX-6 Black
Digital Mixing Desks
$1,319
Portable Professional Mixer, Six stereo inputs, Three stereo outputs (Main / Cue /...
Frequently Asked Questions
While it will technically power them, the volume will be quite low, and you’ll lose some detail due to the limited headroom.
No, these are standard unbalanced 6.3mm stereo jacks; don't expect any noise reduction benefits from balanced connections.
LD Systems generally keeps power supplies clean, but at this price point, a very sensitive listening environment *might* pick up a faint hum – it's unlikely to be a significant issue.
