ADC 660 (Current)

A lightweight, no-frills stethoscope built for comfort and clarity - favored in clinical settings where reliability counts for more than extras.

Overview

The ADC 660 Proscope is a single-head nurse-style stethoscope. It was built for routine exams and blood pressure measurement, and it does that without fuss. It belongs to ADC's Proscope line. It is lightweight, durable and acoustically responsive, and it is a quiet favorite in institutions where staff work shifts, not showrooms. It isn't a cardiologist's dual-head scope with tunable diaphragms and chrome finishes. It's the tool you grab because it's there, it works, and it won't weigh down your pocket after eight hours.

American Diagnostic Corp makes the 660, and outlets like Surgo Surgical Supply distribute it. It is positioned as a general-exam instrument that balances sensitive acoustics with long-wearing comfort. There isn't much proprietary tech in it, but ADC does claim a 50% improvement in acoustic response over traditional designs thanks to its proprietary diaphragm. That is a bold claim for a budget-focused model, though it lines up with user reports of clear, reliable sound transmission. The diaphragm-only chestpiece keeps things simple. There is no flipping between bell and diaphragm, which some nurses and caregivers prefer.

The model number "660" also turns up in vintage audio circles, where it refers to a rare phono cartridge from the same manufacturer. This entry covers the medical device: the ADC 660 Proscope Single Head Nurses Stethoscope. The two products share a name and nothing else. The stethoscope is still in production and widely available through medical suppliers, while the cartridge is long discontinued. All details here are about the stethoscope.

Specifications

Manufacturer	American Diagnostic Corp
Product type	Nurse's Stethoscope
Chestpiece type	Non-chill, diaphragm-only nurse-style chestpiece
Chestpiece diameter	1 3/4"
Chestpiece construction	Lightweight aluminum
Binaurals	Adjustable aluminum binaurals with PVC eartips
Tubing	Flexible 21" PVC tubing made without phthalates
Tubing color options	Choice of 16 tubing colors
Weight	2.41 oz. (68.4g)
Overall length	31.5" (80cm)
Country of manufacture	US
Colour	Grey
Manufacturer Ref	660G
Warranty	1 year
Includes	Spare pair of black mushroom eartips

Key Features

Diaphragm-Only Design for Focused Listening

The diaphragm-only chestpiece is the defining trait of the ADC 660. Dual-head models switch between bell and diaphragm. This one uses a single non-chill diaphragm optimized for mid- to high-frequency sounds, which suits lung and heart auscultation during routine checks. ADC claims the proprietary diaphragm boosts acoustic response by up to 50% over competing designs, a significant jump if accurate. No independent testing data is available. The product literature does keep stressing "sensitive acoustics," which suggests the engineering focus was clarity without amplification. For frequent blood pressure readings or quick respiratory checks, you place it and listen.

Lightweight Aluminum Construction

The 660 weighs just 2.41 oz (68.4g) and is built around a lightweight aluminum chestpiece and binaurals. It isn't premium machined metal meant to last decades. It's functional, durable aluminum, chosen for low mass and resistance to corrosion. Overall length is 31.5" (80cm), and the 21" flexible PVC tubing stays pliable without kinking under normal use. The tubing is phthalate-free, a small detail for healthcare workers concerned about chemical exposure over time.

Comfort and Fit

The adjustable aluminum binaurals allow a customized fit for different ear angles and head sizes. They come with PVC eartips, and a spare set of black mushroom-style eartips is included for replacing worn pairs or getting a more secure fit. The model doesn't specify Adsoft Plus silicone eartips, a feature on higher-end ADC models. The PVC tips are standard issue and widely replaceable. The non-chill rim on the chestpiece prevents the cold shock on patient skin, which makes exams less stressful, especially for pediatric or sensitive patients.

Collectibility & Value

The ADC 660 remains in active production and is sold new through medical supply channels. It isn't a vintage collectible in the traditional sense, and it doesn't trade on nostalgia or rarity. Current pricing starts at CAD 50.24 per unit, with a list price of CAD 58.22. That makes it affordable for institutions buying in bulk, and it's available in cases of 50. A one-year warranty is standard. There is no documented secondary market, no known failure patterns, and no maintenance requirements beyond routine cleaning.