Asheville Music Tools ACV-1 - NOS- Analog Chorus / Vibrato

The ACV-1 NOS Edition features a NOS (New Old Stock) Matsushita (Panasonic) BBD, hand tested and selected by our team. We modified the circuit to emphasize the tonal characteristics of this BBD, and we increased the maximum delay time and modulation amount. The ACV-NOS Edition is wrapped with a premium, mauve powder coat with a gold-gloss sparkle overcoat and trimmed with solid aluminum GØRVA knobs. This limited run is only available until we run out of NOS BBDs. Please see the standard ACV manual for complete feature description & example settings.

The NOS edition features subtle, but noticeable, differences from our standard edition. During audio testing of the BBDs, we observed differences in the headroom, harmonics, distortion, and noise vs. frequency profiles which were consistently different from reissue BBDs. Listening tests clarified the significance of these measurements. The NOS BBD sound is more cohesive, with less smearing. It has a smoother presence with an almost dithered high end, and it possesses a distinct clarity in the fundamentals. To compliment these differences, we moved the center range of the filter down about 130Hz and increased the bass response. This revoicing emphasizes the midrange and the clarity of the bass setting while providing a richer, “meatier” high setting with less sparkle. Lastly, we removed the calibration restriction on the longest delay time, leaving it up to the whims of analog variance. The exact amount will vary from unit to unit, but more than 80ms is typical. This also increases the range of the LFO Amount. Note that, due to these expanded ranges, the Time and Amount positions in our suggested settings may need to be adjusted.

Our NOS artwork utilizes the original Matsushita logo used by Panasonic and is a homage to Kōnosuke Matsushita (11/1894 – 4/1989), a Japanese industrialist, early lighting design engineer, and the founder of Panasonic. Matsushita is referred to as the "God of Management" in Japan to this day.

Specifications:

• Type: 100% Analog signal and control path
• Delay Time: 3.1ms - ~80ms (uncalibrated so varies). Longer with LFO and external Control Voltages
• Feedback: 0 to near infinite. Capable of self-oscillation using tone or EXP input coupled with knob position.
• Rate: LFO RATE, from 0.1Hz to 14Hz (28Hz with CV control)
• Amount: LFO depth control from OFF to 60% of TIME sweep
• Mix: Center 50%. Adjust from full wet to full dry
• Tone: ~613Hz center tilt filter. Center = Flat to 0.3dB
• High +5dB to -10dB, Low +4dB to -7dB.
• Phase Switch: 180° phase shift of wet signal and feedback signal.
• LFO: Selectable Triangle, Sine or slewed Square wave
• Expression Switch: 4 position rotary selects Time, Feedback,
• Rate or Amount external control. All controls are additive to the front panel knob adding extended range. TRS jack usable with CV or Expression pedal, (CV range is 0-5V). Ring supplied current limited 5V output. Control input on Tip.
• Bypass Footswitch: effect on/off user selectable True Bypass or JFET Buffered (Accessible by removing ACV-1 Cover)
• Power: 9VDC @ 150mA. 70-90mA typical. Up to 250mA start up. Standard pedal center negative 2.1mm x 5.5mm barrel.
• Input impedance:1MΩ
• Output impedance: 1KΩ Max (5k max for buffered bypass)
• Max input level: +14.25dBμ (4.0V RMS)
• Max output level: +14dBμ (3.9V RMS)
• Noise Reduction: 2:1 broadband with 10dB HF emphasis
• Genuine Hammond die-cast aluminum enclosure,
• Dimensions: D=4.95” (12.5 cm), W=3.75” (9.4 cm), H=2.25” (5.8cm)
• Weight: 15oz (425g)