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Hartke HA3500 350Watt Hybrid Bass Amp Head - Vintage / Used

   
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This is the original legendary Hartke HA3500 vintage bass amplifier with the iconic "Transient Attack", in great condition including a pro SKB polycarbonite rack case for the head! 

The HA3500 became one of the best-selling bass heads in the industry, remaining a staple for gigging musicians for decades due to its signature blend of tube and solid-state preamps, 10-band graphic EQ, and built-in compression.

Sculpt Your Tone

Featuring two Pre-Amp input knobs, allowing custom blending of tube and solid state tone, and ten-band graphic EQ, the 3500 is ideal for the player who wants plenty of power and control. But we don't stop there. A dedicated preset button allows you to set a equalization curve and two fully adjustable contour knobs provide even more shaping of your distinctive sound. A built-in compressor adds real "punch" to your bass sound, and also allows you to smooth out volume differences between notes. Rugged construction and professional features make the 3500 totally road-worthy. Two independent inputs accommodate both passive and active bass guitars. LEDs that show you the settings of the graphic equalizer in low-light environments as well as a two-color LED that continuously shows the status of the compression circuitry in response to your playing. Electronically balanced direct output provides routing signal to professional mixing consoles for both live performance and recording environments. A ground lift switch helps prevent hum or buzz from entering the signal, and a pre/post switch allows the direct signal to be derived either before or after the amp EQ section. With all the features you need for complete tonal control, along with ample power and rugged design, the 3500 will ensure complete bass euphoria no matter what kind of music you play.

Key Specifications:
Power Output: 350 watts at 4 ohms, 250 watts at 8 ohms
Preamp Section: Selectable Solid-State and Tube preamps (can be blended)
EQ: 10-band graphic EQ
Tone Controls: Rotary Bass & Treble contour knobs
Inputs: Active and Passive 1/4" inputs
Direct Output: Balanced XLR direct out
Additional Features: Adjustable compression, effects loop (Send/Return)
Dimensions: Standard 2U rack-mountable space
 

Specifications

Input Sensitivity Passive Input  100 k Ohms, 20 mV 
Active Input  100 k Ohms, 60 mV 
Rated Power 350 watts @ 4 ohms,, 240 watts @ 8 ohms 
Total Harmonic Distortion  less than .5%
Signal To Noise Ratio  approx. 78 dB 
Contour Low Pass  ±18 dB @ 100 Hz
Contour High Pass ±18 dB @ 10 kHz
 Ten-Band Graphic Equalizer ±15 dB, center detented @ 30 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 3 kHz, 5 kHz, 8 kHz 
Compression Ratio  2:1 to infinity 
Send Output Level 0 dBM 
Return Input Level  0 dBM