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Sale JDS Labs cMoyBB v2.03 Headphone Amplifier (1x9V)

JDS Labs cMoyBB v2.03 Headphone Amplifier (1x9V)

Fully assembled, hand tested Bass Boost cMoy v2.03 headphone amplifier. Includes 9V battery. PCB color may vary. Best for most users. The external DC jack can be used to power...

Unavailable Available Only few left Out of stock Pre-order
JDS-cMoyBB-2.03
Headphone amps + dacs
JDS Labs
$99.00
Unavailable

Fully assembled, hand tested Bass Boost cMoy v2.03 headphone amplifier. Includes 9V battery. PCB color may vary. Best for most users. The external DC jack can be used to power the amplifier, however it does not charge battery. Made in the USA.

The standard features of the Bass Boost cMoy are summarised below:

Exclusive Bass Boost Switch

The cMoyBB ships with an internal bass boost toggle switch. Switched off, the original, flat audio signal is amplified. Switched on, bass is increased up to 9.4 dB, just shy of a perceived 2x increase in bass volume.

Printed Circuit Board (PCB)

Most cMoys are built on protoboard and use thin wires to transfer the audio signal, making them prone to interference and signal degradation.

The cMoyBB v2.03 uses a top-layer ground plane and tightly optimized signal traces, easily outperforming hand-soldered protoboard connections. Proprietary software was used during design of the PCB to check for proper impedance characteristics and negligible crosstalk. Such attention to detail cannot be achieved in protoboard amplifiers, or even in circuit boards designed by most hobbyists.

Power System

A Texas Instruments TLE2426 precision rail splitter and 25V, low noise Nichicon 470 uF capacitor are used to eliminate the unbalanced resistor divider power system found in standard cMoys. The cMoyBB handles more than double the voltage of most cMoys, meaning the dynamic range of high impedance headphones can be extended even further when using a high voltage DC adapter. Version 2.03 optionally allows for a second TLE2426 rail splitter, giving the cMoyBB more current handling capability than ever!

The cMoyBB v2.03 also employs ceramic decoupling capacitors on all IC power pins. Decoupling helps to prevent IC supply ringing, which significantly enhances opamp stability and sound quality.

DC Auxiliary Power Input Jack

Any regulated 9-24V DC power adapter with a 1.3mm x 3.5mm DC jack can be used to power the cMoyBB amplifier. Connecting a DC power adapter to a non-rechargeable cMoyBB automatically and safely disconnects the 9V battery.

cMoyBBs equipped with NiMH recharging circuitry use the same jack to charge the battery. The cMoyBB can be used while charging.

Enclosure

The cMoyBB v2.03 is cased inside of a brand new* Altoids Peppermint tin, protecting the circuit from some forms of external EMI / RF interference. Foam support keeps the battery securely in place.

* Despite each tin being brand new, Altoids tins occasionally have some sort of scratch or dent (not always!). Additionally, you should anticipate minor jack mounting imperfections due to the hand built nature of the product. Please excuse these possible minor cosmetic defects. Thank you!

Features:
  • Alps RK097 Volume Control and On/Off Switch
  • Bass Boost Toggle Switch
  • DC Auxiliary Power Jack
  • Automatic On/Off (senses headphone cord)
  • Texas Instruments OPA2227 Opamp in Gold-Plated DIP Socket
  • Texas Instruments TLE2426 Precision Virtual Ground (2x optional)
  • Decoupling Capacitors on All IC Supply Pins
  • Custom 2-Layer PCB: Compact Layout with Ground Plane
Specifications:
  • Run-Time: 8-50 hrs
  • Frequency Response: +0.01, -0.01 dB (20Hz-20kHz)
  • Output Impedance = Impedance of Opamp
  • Volume Potentiometer Taper: 3B
  • Enclosure Size: 116 x 64 x 21 mm
  • Weight: 3.6 oz (100g)
Included:
  • New Bass Boost cMoy v2.03 Headphone Amplifier
  • Free 9V battery (with standard amplifier)
  • Instructions Sheet
* Please note an interconnect cable is not included and available as an additional accessory.
headphone ampHeadphone Amps + DACsJDS Labs

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