Model 1700 Differential AC Amplifier

Price: $3,130.00 
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Ideal for multiple-unit recordings, evoked potentials,
EEG/EMG/EKG/ERG recordings, long-term potentiation and more.

A-M Systems Model 1700 Differential AC Amplifier

Low Noise

1 µV p-p
Driven Shield Capability

Easy to Use

Analog Controls
Record or Stimulate Modes


Optional Headstages
Customizeable Gain and Controls

The Model 1700 Differential AC Amplifier is perfect for excitable tissue recordings, whether in a reseach laboratory or teaching environment.

Common applications include, but are not limited to:

Multiple-Unit Recordings

Evoked Potentials

EEG/EMG/EKG/ERG recordings

Long-term Potentiation

The Model 1700 Differential AC Amplifier contains 4 independent amplifier channels in a single enclosure enabling the researcher to record multiple signals simultaneously. Each channel contains a high-gain, low-noise differential stage followed by low-pass, high pass, and notch filters. A connection is also provided for a stimulator input so that recording or stimulating through the same electrode is possible without having to change cabling.

Standard gain settings are x100, x1000 or x10,000, but they can be modified to meet your specific requirements. High and Low Pass filters are 2nd order Butterworth filters, and like the gain, the standard settings can be modified to meet your needs if required.

The Model 1700 Differential AC Amplifier is designed for use with low impedance (<1.5 MΩ) electrodes, and is therefore suitable for use with suction, nerve cuff, hook, surface, and simple metal electrodes. Optional record only headstages are available for situations where you would like to record from electrodes with higher impedances such as those used when recording neural spike action potentials.

Contact us to test-drive a Model 1700 in your own rig. No purchase required.


Awake functional MRI detects neural circuit dysfunction in a mouse model of autism. Tsurugizawa, et al. Science Advances 05 Feb 2020: Vol. 6,(6), eaav452

Signal Diversification Is Associated with Corollary Discharge Evolution in Weakly Electric Fish. Matasaburo Fukutomi and Bruce A. Carlson Journal of Neuroscience 12 August 2020, 40 (33) 6345-635

An implantable system for long-term assessment of atrial fibrillation substrate in unanesthetized rats exposed to underlying pathological conditions. Klapper-Goldstein, et al. Sci Rep 10, 553 (2020)

Selective and Context-Dependent Social and Behavioral Effects of Δ9-Tetrahydrocannabinol in Weakly Electric Fish. Neeley B, Overholt T, Artz E, Kinsey S, G, Marsat G. Brain Behav Evol 2018;91:214-227

  • Voltage, fB = 10 Hz-10 kHz, typical: 1.0 µV, p-p
Offset Voltage
  • Average Drift , maximum: ± 30.0 µV/Deg C
Bias Current
  • Initial Bias Current, maximum: ± 0.4 nA
Offset Current
  • Input Offset Current, maximum: ± 0.4 nA
Input Impedance
  • 1012 Ω || 50 pF
Inter-channel Crosstalk
  • 90 dB at 1 kHz
Voltage Range
  • x100: .11 VAC or .11 VDC ± 5%
  • x1000: .011 VAC or .11 VDC ± 5%
  • x10000: .0011 VAC or .11 VDC ± 5%
  • Common Mode Rejection (CMR): 75 dB
Slew Rate
  • 2 V/µS
Rated Output
  • Voltage Output: ± 11 V
  • Current Output: 5 mA
  • Output Resistance: >5 Ωs
Low Cut-Off Filter
  • Cut-Off Frequencies: 0.1, 1.0, 10.0, 100, 300 Hz
  • Cut-Off Rate: 40 dB/decade
High Cut-Off Filter
  • Cut-Off Frequencies: 0.5, 1.0, 5.0, 10, 20 kHz
  • Cut-Off Rate: 40 dB/decade
Notch Filter
  • Center Frequency: 50 Hz or 60 Hz (factory preset)
  • Rejection: >35 dB

Optional Record-Only Headstage

Many users are interested in the simultaneous recording of spike activity and LFPs or EEG. However, spike activity is often performed with high-impedance electrodes (impedance values greater than 1.5 MΩ) and thus require pre-amplifying headstages for effective recording of the neural signal.

Optional record-only headstages can be paired with the Model 1700 in order to perform such recordings. For a minimal modification fee, A-M Systems can modify any channel (or multiple channels) to work with the headstage. We currently offer single and dual channel headstages, and we will be offering a miniature four channel headstage in the near future.

In addition, we can modify the Model 1700 to record both spike and LFP/EEG from the same electrode-headstage combination, by routing the post headstage signal to two separate Model 1700 channels, where each channel has independent gain and filtering. Please contact us for pricing and ordering information.

Modification of Model 1700

It is important to note that modifying the Model 1700 to work with a headstage does comes with a functional cost. Putting a headstage on the front end of one of these units eliminates the ability to use the stimulation mode on that channel of the amplifier, thereby preventing the user from passing current to the site through the electrode. In addition, the headstage is a DC unit, thus the amplifier will saturate if the offset between the electrode and the reference is too large. In the modified units, this is 1 V, which should still provide plenty of room to record most signals.

When we modify a unit for use with a headstage, we decrease the gain on the inner channels by a factor of 10, so the overall gain remains as indicated on the switch labels. The modification consists of supplying power to drive the headstage, and this requires a slight circuit modification.

Please contact us for an accurate price quote for the modification.

A driven shield is used with the INPUT connector to minimize the effect of capacitance on the cable, thus increasing common mode rejection. The shield is driven by a low impedance source with a differential signal voltage from the amplifier. This driven shield (the silver braid) should not be connected to ground, as this will cause noise in the input signal. Instructions on how to convert pin H to a ground or shield can be found in the manual. By default, new instruments are shipped from the factory with the mesh configured as a driven shield.

While minimizing the distance between the electrodes and the amplifier is always preferred, in some situations extended cables are necessary. We have found 12 feet to be the limit before signals start to be impacted. Extended cables can be purchased from A-M Systems.

Model 1700 Input Control Box for Recording and Stimulation

While we do not have an adapter, the 5-pin to BNC (Catalog# 701850) can be used as an input cable.

Yes, products 693050 (Record only cable adapter) and 693055 (recording and stimulating cable adapter) will allow you to connect cables with 5-pin male connectors to the DB9 connector.

Record-only input cables are available in two lengths, 3 feet and 12 feet. Four 693000 3-foot-long record-only input cables are included at no charge with every Model 1700. For convenience, these cables have exposed conductors on one end ready for soldering/crimping to electrode connectors of your choice.

A pre-made record-only cable that terminates in microclips is also available (Catalog #693025).

If you are interested in a cable with a different input connector, please contact us for customization options.

If you want to use the stimulation functionality of the Model 1700, pre-made recording and stimulating cables are available. Product 701750 connects to stimulators with double banana connectors while Product 701850 connects to stimulators with BNC connectors.

Model 1700 DB9 Connector Adapter Model 1700 DB9 Connector to Test Leads Model 1700 DB9 Connector to Double-Banana Model 1700 DB9 Connector to BNC

Based on customer feedback, the Input Control Box enables users to easily swap plus and minus electrode inputs to a channel, as well as record differentially or monopolarly. Has convenient BNC input connectors.

Model 1700 Input Control Box for Recording and Stimulation

For many years, A-M Systems Model 1700 utilized 5-pin connectors for its input and stimulation connections. For those users who have custom cables they would still like to use with our new DB9 version Model 1700, we have two adapter cables available for you. For users requiring only an INPUT cable adapter, product 693050 mates with a male 5-pin connector and converts it to the DB9 record inputs. For users that also require stimulation functionality, product 693055 has two female 5-pin connectors; one for the record cable,and one for the stimulation cable.

Catalog # Product Price
693000 Record-Only Input Cable (DB9 to Open Leads)-3 Feet
Price: $84.00
693012 Record-Only Input Cable (DB9 to Open Leads)-12 Feet
Price: $98.00
692700 Record-Only Input Cable, 3 Ft.-DB9 to Test Clips
Price: $106.00
692800 Record-Only Input Cable, 3 Ft.-DB9 to Double Banana
Price: $106.00
692900 Record-Only Input Cable, 3 Ft.-DB9 to BNC
Price: $106.00
693040 Stimulate/Record Input Cable, DB9 to 2 Sets of Open Leads-3 Ft.
Price: $106.00
693050 Stimulate/Record Input Cable, DB9 to 2 Sets of Open Leads-12 Ft.
Price: $120.00
692750 Stimulate/Record Input Cable, 3 Ft.-DB9 to Test Clips & Open Leads
Price: $130.00
692850 Stimulate/Record Input Cable, 3 Ft.-DB9 to Double Banana & Open Leads
Price: $130.00
692950 Stimulate/Record Input Cable, 3 Ft.-DB9 to BNC & Open Leads
Price: $130.00
693060 Record-Only 5-Pin Connector to DB9 Adapter
Price: $145.00
693055 Stimulate/Record 5-Pin Connector to DB9 Adapter
Price: $195.00
701900 Single-Channel Headstages Input Cable Set (Qty. 4)-4 in.
Price: $45.00
701912 Single-Channel Headstages Input Cable Set (Qty. 4)-12 in.
Price: $49.00
693200 Model 1700 Mini D/C Coupled Headstage-with DB9 Connector
Price: $390.00
692100 Model 1700 Input Control Box with BNC Connectors
Price: $125.00

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How to Request a Quote at A-M Systems
 A-M Systems instruments are not approved for use with human subjects in either a clinical or research environment.
 Due to a large volume of domestic and international orders, fulfillment may take as long as six weeks.
Catalog #:690000
Price: $3,130.00