Demeter Amplification Unveils Bass-400D Hybrid Bass Amplifier

Amplification guru James Demeter was at NAMM this year to introduce the prototype of the Bass 400-D bass amp. Based on last year’s VTBP-M-800D, the 400-D matches Demeter’s classic VTBP-201 tube preamp circuitry with a 400-watt class D power amplifier.

Demeter Amplification Bass-400D Hybrid Bass Amp

The amp starts with a quarter-inch input and active/passive switch to match the preamplifer to your bass’s output. Its tone section includes a four band EQ with controls for treble, middle, and bass as well as presence, which gives up to 12dB of boost at 4kHz. A Mode Switch allows for more general shaping with Dark, Normal, and Bright options.

Demeter fits the back panel with both power an amplifier input and a preamplifier output for extra versatility. It has a pair of Speakon/quarter-inch combo outputs that pump out 400 watts at 4 ohms and 250 watts at 8 ohms. Finally, the Bass 400-D has a studio XLR output with pre or post EQ and ground lift switches. The amp can be upgraded to a Jensen DB-E output transformer for a improved isolation as an option.

The Demeter Amplification Bass-400D is hand wired in the U.S. Though it’s still in its prototype phase, the amp is expected to launch this summer with a MAP price of $999 or $1,199 with the Jensen transformer upgrade.

Demeter Amplification Bass-400D Hybrid Bass Amp Specs:

Preamp Output Impedance:1kohm (unbalanced)
Minimum Load Impedance:10K
Maximum Preamp Output:+24dBB
EQ Gain:+ or - 12dB
Signal to Noise Ratio:- 80dB
Frequency Response:10Hz to 40kHz
Tubes:Hand Selected 12AX7a
Preamp Outputs:1/4″ unbalanced, 3-pin XLR Direct Out
Operating Voltage:115V or 230V AC
Power Supply:220V DC
Filament:6.3 V DC
Power Outputs:Speakon/1/4″ Combo Speaker Jacks
Output Impedance:4 ohm, 8 ohm, 16 ohm
Output Power:400 Watts RMS @ 4 ohms, 250 Watts RMS @ 8 ohm

For more information:
Demeter Amplification

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  1. Jonathan

    Seems like a really neet bass amp, might have to buy this one :( good buy money.