Ampeg

LF Drivers: 1 x 18” Cast
Voice Coil: 4”
Magnet Weight (each): 109 oz
RMS Power Handling: 500-Watts
Frequency Response (-3dB): 35Hz-2kHz
Usable Low Frequency (-10dB): 28Hz
Nominal Impedance: 4-Ohms
Sensitivity: 97dB
Maximum SPL: 130dB
Dimensions (W x H x D inches): 24 x 25 x 22.5
Weight: 86 Pounds

LF Drivers: 4 x 10”
Voice Coil: 2”
Magnet Weight (each): 30 oz
HF Drivers: Horn/Driver
Voice Coil: 1”
Magnet Weight (each): 8 oz
RMS Power Handling: 500-Watts
Frequency Response (-3dB): 48Hz-18kHz
Usable Low Frequency (-10dB): 28Hz
Nominal Impedance: 4-Ohms
Sensitivity: 98dB
Maximum SPL: 125dB
Dimensions (W x H x D inches): 24 x 30 x 19
Shipping Weight: 110 Pounds
Handling Weight: 85 Pounds

LF Drivers: 8 x 10”
Voice Coil: 2”
Magnet Weight (each): 30 oz
RMS Power Handling: 2 x 400-Watts (Stereo)
RMS Power Handling: 800-Watts (Mono)
Frequency Response (-3dB): 58Hz-5kHz
Usable Low Frequency (-10dB): 40Hz
Nominal Impedance: 2 x 8-Ohms (Stereo)
Nominal Impedance: 4-Ohms (Mono)
Sensitivity: 100dB
Maximum SPL: 130dB
Dimensions (W x H x D inches): 26 x 48 x 16
Shipping Weight: 165 Pounds
Handling Weight: 140 Pounds

RMS Power Output: 300-Watts x 2/900 (mono-bridged @ 8 Ohms)
RMS Power Output: 490-Watts x 2/1200 (mono-bridged @ 4 Ohms)
RMS Power Output (2 Ohms): 600-Watts x 2
Preamp: Tubes (3 x 12AX7)
Power Amp: Solid State
Tone Controls: 3-Band
Mid Tone Control: 5-Position
Graphic EQ: Yes, 9-Band
Ultra Low/High Boosts: Yes
Balanced Line Out: Yes x 2 Pre/Post with Level
Effects Loop: Yes x 2
Preamp Out/Power Amp In: Yes x 2
Dimensions (W x H x D inches): 19 x 5.6 x 15.5
Weight: 39.5 Pounds

Specification:

All-tube bass amplifier.

Power 300W RMS @ 4ohm and 2  Ohm.

Preamp with 3 x 12AX7 tubes.

Driver based on 1x 12AX7 and 2 x 12AU7.

Power amp with 6x 6550.

Normal and Bright inputs.

Bass/ Mid/ Treble + 5-way Mid switch.

6 band graphic equalizer.

Ultra Low and Ultra Hi filters.

Effects Loop.

XLR DI output with Pre/Post switch.