acoustic research a 04 integrated amplifier

Integrated Amplifier A-04

• Acoustic Research Inc.; Cambridge, MA
• United States of America (USA)
• Manufacturer / Brand
• Audio Amplifier or -mixer
• Radiomuseum.org ID

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

• Number of Transistors
• Semiconductors present.
• Semiconductors
• Main principle
• Audio-Amplification
• Power type and voltage
• Alternating Current supply (AC)
• Loudspeaker
• - This model requires external speaker(s).
• 116 W (undistorted)
• from Radiomuseum.org
• Model: Integrated Amplifier A-04 - Acoustic Research Inc.;
• Book-shelf unit.
• Dimensions (WHD)
• 430 x 88 x 356 mm / 16.9 x 3.5 x 14 inch

Acoustic Research Integrated Amplifier Model A-04. Power output: 58 watts per channel into 4Ω (stereo) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.03% Damping factor: 120 @ 8Ω Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line) Inputs: CD, Tuner, AUX, Tape, Phono MM, Phono MC Signal to noise ratio:70dB (MC),  80dB (MM), 96dB (line)   Power Requirements: 120VAC 60Hz 220/240VAC 50Hz 120/220/240VAC 50/60 Hz (depending on destination) Power Consumption max. 200 Watts  

• Net weight (2.2 lb = 1 kg)
• 7.6 kg / 16 lb 11.8 oz (16.74 lb)
• Mentioned in
• - - Manufacturers Literature (Service Manual)
• Model page created by Franz Scharner . See "Data change" for further contributors.
• Other Models

Here you find 27 models, 27 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil. All listed radios etc. from Acoustic Research Inc.; Cambridge, MA

 Collections | Museums | Literature

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• NORTH AMERICA

• Stereo, Home Cinema, Headphones Components
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FS: Vintage Acoustic Research AR A-04 Integrated Amplifier

By robin-hobart June 14, 2010 in Stereo, Home Cinema, Headphones Components

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Robin-hobart.

Item: AR A-04 Integrated Amplifier

Location: Hobart, Tas.

Item Condition: Excellent

Reason for selling: Surplus

Payment Method: Pickup - Cash, Paypal, COD Only

Extra Info: LOcal auditions welcome

Pictures: See attached

Not many of these around! Acquired this some time ago as part of my dedicated AR system (with AR 77 t/table, AR93 speakers), but grand plan sort of fizzled & now surplus to requirements. Rated at 40+40 watts into 8 ohms, this vintage piece of kit is in perfect working order. Excellent cosmetic condition. Supports MM and MC phono inputs, CD, tuner, aux. Fold-down front hides tone and tone defeat controls. Neat, elegant & quite heavy unit. Speaker terminals accept banana plugs at rear. Queries welcome.

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I remember this range , we had them in the shop .Looked great and sounded very nice in a Nad-ish sort of way .

Good luck with the sale.

Bump. No vintage enthusiasts out there?

This is surplus to my requirements and a very nice amp for the money.

Reasonable offers will not offend.

Guest indiancurry

Good luck! Not lucky enough to have their speakers which my mate has, but I have a subwoofer.

Bump - good match for a vintage system or old AR speakers

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AR A-04 Integrated Amplifier pg6

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AR A-07 integrated

• Thread starter WickedSharp
• Start date Sep 9, 2016

WickedSharp

Scratchy and crunchy is how i like it.

• Sep 9, 2016

Thoughts on this unit? $80 seem fair? Steve  

Well-Known Member

Seems like a good price for one. I remember when those came out - the last years of Teledyne's ownership of AR. Teledyne spent quite a bit on the R&D of that series, and then advertised them heavily in audio magazines, but ultimately they didn't sell many likely due to their sloped front panel and rather plain looks. Teledyne lost their shirts and sold AR to Jensen. But from what I remember, the amps were engineered quite well. Still, I'd test every function of it before buying.  

• Sep 10, 2016

Picked it up but haven't played with it yet. Can anyone share output specs at 8ohm? I can't find that info anywhere. It's quite clean. Missing one preamp jumper. The gentleman I got it from said he was the original owner as well as the original designer of the amp back in the early '90s. Then he told me it was a piece of history. Pictures later on...  

WickedSharp said: Picked it up but haven't played with it yet. Can anyone share output specs at 8ohm? I can't find that info anywhere. It's quite clean. Missing one preamp jumper. The gentleman I got it from said he was the original owner as well as the original designer of the amp back in the early '90s. Then he told me it was a piece of history. Pictures later on... Click to expand...

Had the A-06. It was my first serious amplifier. Didn't know what I had at the time, but it was real sweet sounding. Sold it because I got seduced by the sexiness of imported British gear and bought a Rega integrated. Wish I had never sold it.  

• Sep 11, 2016

I did find this... A07-Verstärker-Daten: - Vollverstärker mit 7 Eingängen: Phono (MM/MC), CD/AUX, Tuner, Tape 1, Tape 2, VCR 1, VCR 2 (VCR1 und 2 mit Video-Signal-Switch) - Pre-Amp-Ausgang - Vorverstärker-Eingang - Maximale Dauerlast (auch Sinus-Wert genannt): 75 W an 8 Ohm, 110 W an 4 Ohm - Dynamische Last (Peak-Level): 90W an 8 Ohm, 140 W an 4 Ohm So we'd call this 75 wpc at 8 Ohm?  

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Manual Library / Acoustic Research

Acoustic Research Amplifier UK

Stereo Integrated Amplifier

Specifications

Power output: 45 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.06%

Input sensitivity: 0.2mV (MC), 3mV (MM), 150mV (line)

Signal to noise ratio: 73dB (MC), 80dB (MM), 80dB (line)

Channel separation: 50dB (MM)

Speaker load impedance: 4Ω (minimum)

Dimensions: 430 x 66 x 280mm

Acoustic Research Integrated Amplifiers

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