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The Quilter Labs Bass Block V803 combines modern Class-D amplification with the warmth of vintage tube sounds. Featuring a robust 800W output and 3 Amp Voice options with a 4 knob EQ.
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The powerful Quilter Labs Bass Block V803 is a versatile bass amplifier that combines modern Class-D amplification with the warmth of vintage tube sounds. A robust 800W output ensures exceptional performance across various speaker setups, supported by a quiet, variable-speed fan for reliable, heavy-duty use.
The Bass Block V803 is designed to meet the demands of professional musicians, providing robust performance and flexibility. Whether seeking the precision of modern amplification or the nostalgic tone of vintage tube amps, this amplifier provides high-quality sound and reliable operation in a compact, modern package.
Additional Features: The rear panel offers dual Speakon™ Combo connectors for speaker compatibility, a locking AC cord for reliable power connection, and universal AC power support for use worldwide. The XLR Line Out pre-MASTER for consistent signal level regardless of where you set stage power.
User Convenience: Features a MUTE-ACTIVE-PASSIVE switch with a bright LED indicator, and an FX Return that can be used as a stealth input for backing tracks. The headphone output automatically switches from FRFR on MODERN to cab-sim on WARM and Q-TUBE settings.
VOICINGS:
*Modern- This setting duplicates the performance of the Bass Block 802, Our exclusive dual limiter prevents lower strings from bottoming out, even on high BASS settings, without choking or gagging the upper strings. Dynamic range is optimized, with a feeling of “grunt” or “effort” replacing the usual breakup at peak power. The power amp is “tight” with a high damping factor that keeps the speakers under control. Power delivery depends on speaker impedance, with up to 450W into 8 ohms and over 800W into 4 ohms.
*Warm- This position retains the dual limiter system for “bottomless” bass performance, but changes the amplifier impedance to “loosen up” the sound of most speakers, producing a warm “old-school” bass response normally associated with vintage tube amps. The rated power varies from 450 to 500W into either 8 or 4 ohm load, but due to the added voltage swing into resonant frequencies, the overall volume level sounds as big as the MODERN setting.
*QTUBE- This position uses the same amplifier character as WARM, but replaces the limiter system with a tube-like clipping circuit, providing a smooth transition from clean to breakup, similar to classic tube amps. Power at breakup ranges from 450W to 500 W into 8 and 4 ohm loads
INPUT SWITCH:
*PASSIVE- This position has 10dB more gain to match typical passive pickups.
*ACTIVE- This position is padded 10dB relative to PASSIVE, to balance the volume of an active bass with average control settings.
*MUTE- This position blocks the signal prior to the SPEAKER and SIG-OUT jacks, for noise-free instrument changes, with a bright red LED to remind the user that Mute is engaged. The FX LOOP is still active, so a tuner may be used on the MUTE position.
GAIN/EQ:
*GAIN- The GAIN control regulates the overall input volume to the preamp, along with the ACTIVE-PASSIVE switch settings.
*TREBLE- A shelving filter boosts or cuts frequencies starting above 500Hz, reaching full swing at about 2kHz. This controls the “snap” or plucking overtones of the bass strings.
*MIDRANGE- A selective midband filter boosts or cuts a band of frequencies centered at about 250Hz to 1kHz, depending on the Frequency setting. This can cut or boost the “twonk” or “bark” frequencies. Boosts can be used for emphasis, and cuts could help control midrange feedback howl on acoustic bass instruments.
*BASS- A selective 4th order shelving filter adjusts frequencies below 100Hz, acting mainly on the lowest strings of the bass guitar’s range. Boosting BASS will produce a deep rounded tone. If pushed into limiting (on the Modern or Warm Voice), the low frequencies are limited separately, allowing the overtones and higher strings to “catch up” with the bass foundation, preserving a sense of effort without bottoming out or choking off the upper strings.
*MASTER- Controls overall out output of the amp. After adjusting your Gain and tone as described above, use the MASTER control to match the overall output power to your speaker's capacity.
INPUTS:
*FLAT- A high impedance input matches both passive and active bass signals with no frequency shaping. All frequencies are treated equally, revealing the natural sound of your bass instrument.
*SCOOP- This input produces an initial tone that is similar to classic “tone stack” EQ sections which have an inherent mid scoop. This input has full bass, leaner midrange, and silkier highs
HIGHLIGHTS:
Quilter Bass Block V803 Bass Guitar Head Features
CALIFORNIA PROPOSITION 65 WARNING
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
Quilter Bass Block V803 Bass Guitar Head 800 Watts Specifications
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