Vintage Acoustic 470 Bass / Guitar Amplifier
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Listed:8 years ago
Views:947
Watchers:27
Offers:1
Sparta, TN, United States
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1970's Acoustic Control Corporation Model 470 Lead / Bass Guitar Amplifier
This is an incredibly L O U D amplifier, with a sound reminiscent of the old Sunn amps. It is equally suitable for bass or guitar. Rated at 170 Watts RMS into your choice of a 2, 4 or 8-ohm load.
The condition is excellent; photos are intended to show any visible wear and tear, This amp has been cared for. It is ready to go.
In some photos, it is shown with a 2 X 15 Acoustic 106 cabinet. The cabinet is also available, however, this listing is for the amp head only.
From the Owner's Manual: "Acoustic's Model 470 is a versatile guitar amplifier with many special features including a dual channel preamplifier. Model 470 produces 170 watts RMS power into a 4 ohm speaker with less than 5% distortion. The LEAD/BASS Switch located on the front panel is unique in that it allows the amplifier to be used as either a lead guitar or a bass guitar amplifier. Besides having a quality sound and a powerful sound system, Model 470 excels in flexibility due to its advanced engineering."
Some consider this to be the best amplifier made by Acoustic Control, and while I do not have adequate knowledge to affirm that, I will say that this is one of the best amps I have encountered by any manufacturer. I am a huge fan of vintage tube amps, and yet I like the massive sound of this vintage solid state amp. It is a beast.
Acoustic designed this amplifier to be equally suitable for guitar or bass, and I have tested it with both instruments. You select the preference for guitar or bass with a switch on the right side of the amp below the power switch. In the Lead position, this is a wide-band flat amplifier, you hear fundamental tones plus harmonics; in the Bass position, harmonics beyond 1200 Hz are de-emphasized. The ground polarity switch is also located here. There are two instrument inputs, the top input is louder than the bottom input, which is 10dB lower in gain - useful with high output pickups.
This is a two channel amplifier. Channels are selected by a switch on the front panel, or by the footswitch (not included). Each of the channels can dialed in using rotary controls for volume, treble, mid and bass. These tone controls are the 'cut and boost' type In addition, there is a Normal/Bright switch for each channel.
The effects are excellent; this amp offers distortion, tremelo and reverb. Distortion and reverb 'mix' are adjusted by the corresponding rotary controls. Tremelo has independent controls for speed and intensity. A rocker switch allows you to select whether distortion is on both channels, or on channel B only.
The 5-band equalizer allows further tone shaping with -20 to +20 dB of control on each band via the sliders. Bands are 70, 140, 280, 1100, and 2200 HZ. The mid tone control on each channel can also be used as part of the Graphic Equalizer for frequencies between 460 to 700 Hz.
Selectable voltages: 107V, 120V, 210V, or 240V at 50 or 60Hz, using slide switches inside amplifier.
Owner's Manual -
Service Manual -
Booster Output - allows you to drive an additional power amplifier and speakers using the Model 470 head to control the extra amplifier.
Line Output - allows you to control a bank of power amps and associated speakers from one main control amplifier. As it is tied to the output of the preamplifier, the output of this jack is lowered as amp volume is lowered. This jack cannot drive a speaker directly.
Accessory Jack - a TRS jack is used to send and return signal to effects.
Speakers: Any impedance between 2 ohms and 4 ohms will give optimum results; that is, 170 Watts RMS. 4 ohms is the best match because with a 4-ohm load, the amplifier runs slightly cooler. Use of impedances less than 2 ohms may reduce maximum power output and cause extraordinary heating, while use of impedances greater than 4 ohms will reduce the maximum power output available and will enable operation at reduced temperatures.
Size Physical Dimensions ....24-5/8" W x 7" H x 12-1/2" D Weight 30 lbs. AC power cord - 14 feet.
This is an incredibly L O U D amplifier, with a sound reminiscent of the old Sunn amps. It is equally suitable for bass or guitar. Rated at 170 Watts RMS into your choice of a 2, 4 or 8-ohm load.
The condition is excellent; photos are intended to show any visible wear and tear, This amp has been cared for. It is ready to go.
In some photos, it is shown with a 2 X 15 Acoustic 106 cabinet. The cabinet is also available, however, this listing is for the amp head only.
From the Owner's Manual: "Acoustic's Model 470 is a versatile guitar amplifier with many special features including a dual channel preamplifier. Model 470 produces 170 watts RMS power into a 4 ohm speaker with less than 5% distortion. The LEAD/BASS Switch located on the front panel is unique in that it allows the amplifier to be used as either a lead guitar or a bass guitar amplifier. Besides having a quality sound and a powerful sound system, Model 470 excels in flexibility due to its advanced engineering."
Some consider this to be the best amplifier made by Acoustic Control, and while I do not have adequate knowledge to affirm that, I will say that this is one of the best amps I have encountered by any manufacturer. I am a huge fan of vintage tube amps, and yet I like the massive sound of this vintage solid state amp. It is a beast.
Acoustic designed this amplifier to be equally suitable for guitar or bass, and I have tested it with both instruments. You select the preference for guitar or bass with a switch on the right side of the amp below the power switch. In the Lead position, this is a wide-band flat amplifier, you hear fundamental tones plus harmonics; in the Bass position, harmonics beyond 1200 Hz are de-emphasized. The ground polarity switch is also located here. There are two instrument inputs, the top input is louder than the bottom input, which is 10dB lower in gain - useful with high output pickups.
This is a two channel amplifier. Channels are selected by a switch on the front panel, or by the footswitch (not included). Each of the channels can dialed in using rotary controls for volume, treble, mid and bass. These tone controls are the 'cut and boost' type In addition, there is a Normal/Bright switch for each channel.
The effects are excellent; this amp offers distortion, tremelo and reverb. Distortion and reverb 'mix' are adjusted by the corresponding rotary controls. Tremelo has independent controls for speed and intensity. A rocker switch allows you to select whether distortion is on both channels, or on channel B only.
The 5-band equalizer allows further tone shaping with -20 to +20 dB of control on each band via the sliders. Bands are 70, 140, 280, 1100, and 2200 HZ. The mid tone control on each channel can also be used as part of the Graphic Equalizer for frequencies between 460 to 700 Hz.
- Band 1 (70) = 50 to 110 Hz; Band 2 (140) = 110 to 220 Hz; Band 3 (280) = 220 to 460 Hz; Mid-range tone control = 460 to 700 Hz; Band 4 (1100) = 700 to 1500 Hz; Band 5 (2200) = 1500 to 2800 Hz.
Selectable voltages: 107V, 120V, 210V, or 240V at 50 or 60Hz, using slide switches inside amplifier.
Owner's Manual -
Service Manual -
Booster Output - allows you to drive an additional power amplifier and speakers using the Model 470 head to control the extra amplifier.
Line Output - allows you to control a bank of power amps and associated speakers from one main control amplifier. As it is tied to the output of the preamplifier, the output of this jack is lowered as amp volume is lowered. This jack cannot drive a speaker directly.
Accessory Jack - a TRS jack is used to send and return signal to effects.
Speakers: Any impedance between 2 ohms and 4 ohms will give optimum results; that is, 170 Watts RMS. 4 ohms is the best match because with a 4-ohm load, the amplifier runs slightly cooler. Use of impedances less than 2 ohms may reduce maximum power output and cause extraordinary heating, while use of impedances greater than 4 ohms will reduce the maximum power output available and will enable operation at reduced temperatures.
Size Physical Dimensions ....24-5/8" W x 7" H x 12-1/2" D Weight 30 lbs. AC power cord - 14 feet.
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| Listed | 8 years ago |
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| Condition | Excellent (Used) Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more |
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