HARTKE Bass Head LH 500

HARTKE Bass Head LH500 | 500-Watt Tube Preamp Bass Amplifier

• 500W @ 4 Ohms — Enough power to drive any bass cabinet on the market, with 350W output available at 8 ohms for flexible speaker pairing.

• 12AX7 Class-A Tube Preamp — High-voltage tube front-end delivers warm, natural, musical tone that sits perfectly in any mix.

• Tone Stack EQ — Bass and Treble shelving controls plus a mid-peak EQ for precise, professional-grade sound shaping.

• Brite Switch — Selectable high-frequency boost for added top-end clarity and presence.

• Built-in Limiter — Switchable limiter with LED indicator protects your speakers and maintains consistent output at high volumes.

• Front-Panel XLR Balanced DI — Send a studio-quality signal directly to a PA or recording interface — no external DI box required.

• Rear 1/4" Effects Loop — Dedicated send/return loop for seamlessly integrating pedals or rack-mounted outboard gear.

• Rack-Mountable 2U Steel Chassis — Road-tough metal build with handles, fits any standard 19" rack for pro-level transport and setup.

Specifications:

• Output Power: 500W @ 4 ohms / 350W @ 8 ohms

• Preamp Tube: 12AX7 Class-A (High Voltage)

• Passive Input Sensitivity: 100kΩ, 20mV

• Active Input Sensitivity: 100kΩ, 60mV

• Total Harmonic Distortion: <0.5%

• Signal to Noise Ratio: ~78dB

• Effects Loop: 0dBm Send / 0dBm Return

• Dimensions: 19" × 14.5" × 3.25" / 483 × 369 × 83mm

• Weight: 23.10 lb / 10.50 kg