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Aguilar DB 680 Manual

Tube bass preamp
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Model DB 680
Tube Bass Preamp
Congratulations on purchasing Aguilar Amplification's DB 680 Tube Bass Preamp!
The DB 680 is designed and manufactured to provide the most discriminating bass player
with a studio and live performance tool worthy of a fine instrument. The DB 680
addresses the contemporary bass player's needs in all studio and live applications, and is as
effective for recording as a chain of the most desirable classic studio gear.
The DB 680 has two fully parametric EQs, not semi-parametric, for complete tone
shaping possibilities, a tube driven resonance circuit, tube effects loop, and variable
balanced outputs. For the road, there's a great sounding crossover, -40 pre and post-eq
outputs for the mixing console and footswitchable inputs and master mute (leaves tuner
input on for silent tuning). The chassis of the DB 680 is steel, and can withstand the
bumps and grinds of a tour.
Most importantly, the ten tube stages make for a sweet, warm tone and smooth feel
beyond compare!
All Aguilar products are hand made in NYC
www.aguilaramp.com

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Summary of Contents for Aguilar DB 680

  • Page 1 Model DB 680 Tube Bass Preamp Congratulations on purchasing Aguilar Amplification's DB 680 Tube Bass Preamp! The DB 680 is designed and manufactured to provide the most discriminating bass player with a studio and live performance tool worthy of a fine instrument. The DB 680 addresses the contemporary bass player’s needs in all studio and live applications, and is as...

  • Page 2: Specifications

    Specifications: All measurements taken with a line voltage of 120 VAC. All voltages are RMS. All noise measurements are unweighted. Tube complement: Five total; two 12AX7A/7025 high-mu twin triodes and three 12AU7 medium-mu twin triodes Input Impedance: 1 M ohm (passive mode) 56 K ohm (active mode) Output impedance: Normal output = 1K ohm.
  • Page 3 Input Gain Control: This pot controls the gain of the preamp section. Clean sounds are usually achieved by setting the input gain around 11 or 12 o’clock. A little bit of musical distortion will occur if set past one or two o’clock. Dual Parametric Equalization: There are two serially arranged active networks, +/-12db.

  • Page 4: Rear Panel

    Bright Switch: This switch is a passive RC pre-emphasis circuit at 5-7 kHz. The bright switch will add a brighter timbre to the entire range of your bass. Tube Effects Loop: The preamp contains a tube parallel effects loop with an adjustable send and mix control. On the front panel the send pot controls the level of your bass going to the effect.
  • Page 5 XLR Balanced Output: Unlike conventional DI outputs, this balanced configuration allows you to record directly to any line input (i.e. tape, hard disk recording system, etc.). No mic-pre is required! The output level has five positions to cover all possible recording and concert situations. Use the -40db pre-eq setting in a concert situation where the house mixer is taking a signal into the house-mixing console.
  • Page 6 USER TIPS FOR THE DB 680: Input Gain: Set this control between 10 and 1 o’clock, depending on the output level of your bass. If you have active electronics on your bass, you can still use the passive input on the DB 680.
  • Page 7 Parametric EQ Section: The top row, going from left to right, is as follows: frequency sweep (low to high mid- range), level of cut or boost (-12db to +12db), and bandwidth (two octave range). The bottom row, from left to right, is as follows: frequency sweep (high mid-range to very high frequencies), level of cut or boost (-12db to +12db), and bandwidth (two octave range).

  • Page 8: Limited Warranty

    Limited Warranty Aguilar Amplification’s DB 680 tube bass preamp is warranted to the original owner for a period of ten years from the date of purchase against defects in materials and workmanship. Tubes are covered by the warranty for a period of one year.

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