Acoustic 1973 450 Solid State Bass Amplifier and 404 Bass Cabinet USED

Acoustic

Used amplifier and cabinet.  Sold as pair. Comes with original owners manual and cover(s). Recently serviced by an amp tech.

LOCAL SALE ONLY / WILL NOT SHIP 

 

MODEL 450 ELECTRICAL SPECIFICATIONS


1. OUTPUT

  • Power output (continuous) across 4 ohm load @ less than 5% distortion: 170 Watts RMS
  • Peak power output (instantaneous) across 4 ohm load @5% distortion: 450  Watts
  • Power output (continuous) across 2 ohm load @ 5% distortion: 170 Watts RMS
  • Peak power output (instantaneous) across 2 ohm load @ 5% distortion: 400 Watts
2. GAIN (All controls flat volume max.)
  • Preamp gain (from input to line output): 38 dB or 80X
  • Total gain: 63.5 dB or 1500X
  • Power amplifier gain from ext. inputs speaker output: 55 dB or 500X
3. SENSITIVITY
  • Input voltage for maximum output: Input 1: 15mv RMS / Input 2: 45 mv RMS
  • Input voltage capability (maximum): Input 1: 15 mv RMS / Input 2: 1.6V RMS
  • Nominal Input impedance: Input 1: 470K OHMS / Input 2: 69K OHMS
4. NOISE (all controls flat, inputs shorted)

 

  • Noise-to-full-output ratio
    • -volume minimum: 78 dB below full output
    • volume maximum: 78 dB below full output

5. FREQUENCY RESPONSE

  • At 10 Watt level:  -3dB, 27 Hz to 21K Hz
  • Power bandwidth 1/2 power point

6. AUXILIARY OUTPUTS

  • Output Voltage: 250 mv RMS
  • Impedance: 5000 ohms
  • Booster Output: 275 mv RMS
  • Impedance: 1 K ohms
7. DISTORTION CIRCUIT (all controls flat, distortion control and volume control max.)
  • Minimum Input Required to Clip Power Amp: 425 Microvolts

8. RANGE OF TONE CONTROLS

  • Bass: +15 dB Boost, -15 dB cut @ 50 Hz
  • Treble:  +15 dB Boost, -25 dB cut @ 10KHz
  • Mid-Range: +7 dB Boost, -30 dB cut @ 400 Hz
  • Bright Switch Boost: 6 dB per octave from 200 Hz to 5KHz

9. RANGE OF GRAPHIC EQUALIZER 

  • Section 1: +/- 16 dB @ 70 Hz
  • Section 2: +/- 16 dB @ 140 Hz
  • Section 3: +/- 16 dB @ 280 Hz
  • Section 4: +/- 16 dB @ 1100 Hz
  • Section 5: +/- 16 dB @ 2200 Hz 

MODEL 404 SPEAKER CABINET SPECIFICATIONS

  • Speaker Complement:  6 Eminence 12" Speakers
  • Cabinet Design:  Sealed System
  • Cabinet Construction:  3/4" Braced Plywood
  • Speaker Access:  Snap-Off Grill Frame
  • Speaker Mounting (each speaker):  .8 Bolts (8-32 Threads)
  • Cabinet Size:  ...42" H × 28" W x 15" D
  • Shipping Weight:  137 Ibs.
  • Nominal Impedance:  4 ohms
  • Power Handling Capacity: 200 Watts Continuous